I'm working with a customized camera activity, and loading the captured image in a listview activity. The loading function is only workable before i have switched to custom camera, it is working fine with existing camera application.
cameraActivity.java
public class custom_camera extends Activity {
private Camera mCamera;
private custom_camera_preview mPreview;
private PictureCallback mPicture;
private ImageButton capture;
private ImageButton switchCamera;
private Context myContext;
private LinearLayout cameraPreview;
private boolean cameraFront = false;
private Uri mCapturedImageURI;
LayoutInflater controlInflater = null;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.camera_main);
controlInflater = LayoutInflater.from(getBaseContext());
View viewControl = controlInflater.inflate(R.layout.control, null);
LinearLayout.LayoutParams layoutParamsControl = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.FILL_PARENT, LinearLayout.LayoutParams.FILL_PARENT);
this.addContentView(viewControl, layoutParamsControl);
getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
myContext = this;
initialize();
}
private int findFrontFacingCamera() {
int cameraId = -1;
// Search for the front facing camera
int numberOfCameras = Camera.getNumberOfCameras();
for (int i = 0; i < numberOfCameras; i++) {
CameraInfo info = new CameraInfo();
Camera.getCameraInfo(i, info);
if (info.facing == CameraInfo.CAMERA_FACING_FRONT) {
cameraId = i;
cameraFront = true;
break;
}
}
return cameraId;
}
private int findBackFacingCamera() {
int cameraId = -1;
//Search for the back facing camera
//get the number of cameras
int numberOfCameras = Camera.getNumberOfCameras();
//for every camera check
for (int i = 0; i < numberOfCameras; i++) {
CameraInfo info = new CameraInfo();
Camera.getCameraInfo(i, info);
if (info.facing == CameraInfo.CAMERA_FACING_BACK) {
cameraId = i;
cameraFront = false;
break;
}
}
return cameraId;
}
public void onResume() {
super.onResume();
if (!hasCamera(myContext)) {
Toast toast = Toast.makeText(myContext, "Sorry, your phone does not have a camera!", Toast.LENGTH_LONG);
toast.show();
finish();
}
if (mCamera == null) {
//if the front facing camera does not exist
if (findFrontFacingCamera() < 0) {
Toast.makeText(this, "No front facing camera found.", Toast.LENGTH_LONG).show();
switchCamera.setVisibility(View.GONE);
}
mCamera = Camera.open(findBackFacingCamera());
mCamera.setDisplayOrientation(90);
mPicture = getPictureCallback();
mPreview.refreshCamera(mCamera);
}
}
public void initialize() {
cameraPreview = (LinearLayout) findViewById(R.id.camera_preview);
mPreview = new custom_camera_preview(myContext, mCamera);
cameraPreview.addView(mPreview);
capture = (ImageButton) findViewById(R.id.takepicture);
capture.setOnClickListener(captrureListener);
switchCamera = (ImageButton) findViewById(R.id.button_ChangeCamera);
switchCamera.setOnClickListener(switchCameraListener);
}
View.OnClickListener switchCameraListener = new View.OnClickListener() {
#Override
public void onClick(View v) {
//get the number of cameras
int camerasNumber = Camera.getNumberOfCameras();
if (camerasNumber > 1) {
//release the old camera instance
//switch camera, from the front and the back and vice versa
releaseCamera();
chooseCamera();
} else {
Toast toast = Toast.makeText(myContext, "Sorry, your phone has only one camera!", Toast.LENGTH_LONG);
toast.show();
}
}
};
public void chooseCamera() {
//if the camera preview is the front
if (cameraFront) {
int cameraId = findBackFacingCamera();
if (cameraId >= 0) {
//open the backFacingCamera
//set a picture callback
//refresh the preview
mCamera = Camera.open(cameraId);
mCamera.setDisplayOrientation(90);
mPicture = getPictureCallback();
mPreview.refreshCamera(mCamera);
}
} else {
int cameraId = findFrontFacingCamera();
if (cameraId >= 0) {
//open the frontFacingCamera
//set a picture callback
//refresh the preview
mCamera = Camera.open(cameraId);
mCamera.setDisplayOrientation(90);
mPicture = getPictureCallback();
mPreview.refreshCamera(mCamera);
}
}
}
#Override
protected void onPause() {
super.onPause();
//when on Pause, release camera in order to be used from other applications
releaseCamera();
}
private boolean hasCamera(Context context) {
//check if the device has camera
if (context.getPackageManager().hasSystemFeature(PackageManager.FEATURE_CAMERA)) {
return true;
} else {
return false;
}
}
private PictureCallback getPictureCallback() {
PictureCallback picture = new PictureCallback() {
#Override
public void onPictureTaken(byte[] data, Camera camera) {
//make a new picture file
File pictureFile = getOutputMediaFile();
if (pictureFile == null) {
return;
}
try {
//write the file
FileOutputStream fos = new FileOutputStream(pictureFile);
fos.write(data);
fos.close();
Toast toast = Toast.makeText(myContext, "Picture saved: " + pictureFile.getName(), Toast.LENGTH_LONG);
toast.show();
} catch (FileNotFoundException e) {
} catch (IOException e) {
}
//refresh camera to continue preview
mPreview.refreshCamera(mCamera);
Intent i = new Intent(getApplicationContext(),listview_page.class);
startActivity(i);
}
};
return picture;
}
View.OnClickListener captrureListener = new View.OnClickListener() {
#Override
public void onClick(View v) {
mCamera.takePicture(null, null, mPicture);
}
};
//make picture and save to a folder
private static File getOutputMediaFile() {
//make a new file directory inside the "sdcard" folder
File mediaStorageDir = new File("/sdcard/", "JCG Camera");
//if this "JCGCamera folder does not exist
if (!mediaStorageDir.exists()) {
//if you cannot make this folder return
if (!mediaStorageDir.mkdirs()) {
return null;
}
}
//take the current timeStamp
String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss").format(new Date());
File mediaFile;
//and make a media file:
mediaFile = new File(mediaStorageDir.getPath() + File.separator + "IMG_" + timeStamp + ".jpg");
return mediaFile;
}
private void releaseCamera() {
// stop and release camera
if (mCamera != null) {
mCamera.release();
mCamera = null;
}
}
}
listview.java
public class listview_page extends Activity{
private ArrayList<MyImage> images;
private ImageAdapter imageAdapter;
private ListView listView;
private Uri mCapturedImageURI;
private static final int RESULT_LOAD_IMAGE = 1;
private static final int REQUEST_IMAGE_CAPTURE = 2;
private DAOdb daOdb;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.listview_main);
// Construct the data source
images = new ArrayList();
// Create the adapter to convert the array to views
imageAdapter = new ImageAdapter(this, images);
// Attach the adapter to a ListView
listView = (ListView) findViewById(R.id.main_list_view);
listView.setAdapter(imageAdapter);
addItemClickListener(listView);
initDB();
}
/**
* initialize database
*/
private void initDB() {
daOdb = new DAOdb(this);
// add images from database to images ArrayList
for (MyImage mi : daOdb.getImages()) {
images.add(mi);
}
}
public void btnAddOnClick(View view) {
final Dialog dialog = new Dialog(this);
dialog.setContentView(R.layout.custom_dialog_box);
dialog.setTitle("iTongue");
dialog.findViewById(R.id.btnChoosePath).setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
activeGallery();
}
});
dialog.findViewById(R.id.btnTakePhoto).setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
activeTakePhoto();
Intent i = new Intent(getApplicationContext(),custom_camera.class);
startActivity(i);
}
});
// show dialog on screen
dialog.show();
}
/**
* take a photo
*/
private void activeTakePhoto() {
Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
if (takePictureIntent.resolveActivity(getPackageManager()) != null) {
String fileName = "temp.jpg";
ContentValues values = new ContentValues();
values.put(MediaStore.Images.Media.TITLE, fileName);
mCapturedImageURI = getContentResolver().insert(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, values);
takePictureIntent.putExtra(MediaStore.EXTRA_OUTPUT, mCapturedImageURI);
startActivityForResult(takePictureIntent, REQUEST_IMAGE_CAPTURE);
}
}
/**
* to gallery
*/
private void activeGallery() {
Intent intent = new Intent(Intent.ACTION_PICK, android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
startActivityForResult(intent, RESULT_LOAD_IMAGE);
}
#Override protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
switch (requestCode) {
case RESULT_LOAD_IMAGE:
if (requestCode == RESULT_LOAD_IMAGE && resultCode == RESULT_OK && null != data) {
Uri selectedImage = data.getData();
String[] filePathColumn = {MediaStore.Images.Media.DATA};
Cursor cursor = getContentResolver().query(selectedImage, filePathColumn, null, null, null);
cursor.moveToFirst();
int columnIndex = cursor.getColumnIndex(filePathColumn[0]);
String picturePath = cursor.getString(columnIndex);
cursor.close();
MyImage image = new MyImage();
image.setTitle("Tongue Image");
image.setDescription("test choose a photo from gallery and add it to " + "list view");
image.setDatetime(System.currentTimeMillis());
image.setPath(picturePath);
images.add(image);
daOdb.addImage(image);
}
case REQUEST_IMAGE_CAPTURE:
if (requestCode == REQUEST_IMAGE_CAPTURE && resultCode == RESULT_OK) {
String[] projection = {MediaStore.Images.Media.DATA};
Cursor cursor = managedQuery(mCapturedImageURI, projection, null, null, null);
int column_index_data = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
cursor.moveToFirst();
String picturePath = cursor.getString(column_index_data);
MyImage image = new MyImage();
image.setTitle("Tongue Image");
image.setDescription("test take a photo and add it to list view");
image.setDatetime(System.currentTimeMillis());
image.setPath(picturePath);
images.add(image);
daOdb.addImage(image);
}
}
}
/**
* item clicked listener used to implement the react action when an item is
* clicked.
*
* #param listView
*/
private void addItemClickListener(final ListView listView) {
listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
#Override public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
MyImage image = (MyImage) listView.getItemAtPosition(position);
Intent intent = new Intent(getBaseContext(), DisplayImage.class);
intent.putExtra("IMAGE", (new Gson()).toJson(image));
startActivity(intent);
}
});
}
#Override protected void onSaveInstanceState(Bundle outState) {
// Save the user's current game state
if (mCapturedImageURI != null) {
outState.putString("mCapturedImageURI", mCapturedImageURI.toString());
}
// Always call the superclass so it can save the view hierarchy state
super.onSaveInstanceState(outState);
}
#Override protected void onRestoreInstanceState(Bundle savedInstanceState) {
// Always call the superclass so it can restore the view hierarchy
super.onRestoreInstanceState(savedInstanceState);
// Restore state members from saved instance
if (savedInstanceState.containsKey("mCapturedImageURI")) {
mCapturedImageURI = Uri.parse(savedInstanceState.getString("mCapturedImageURI"));
}
}
}
My first time posting a question, sorry for the massive code.
You can do it by following way
1st way: You make Application class and save set and get according to requesrment
you remember that you must defined it in menifest file like as
2nd way: make interface class
3rd way: making static object
Related
Hi I am using camera and gallery button. When I select camera, I display by opening camera, taking picture and sending that picture to next activity through intent. This works fine.
But when I select gallery button, it opens gallery image but it's not displaying image in next activity. There is no error. Just a blank black screen.
It displays as,
I/Choreographer: Skipped 2103 frames! The application may be doing too much work on its main thread.
Please help to solve this.
Thanks.
public class TestCameraActivity extends AppCompatActivity {
private CameraPreview mImageSurfaceView;
public Camera camera = null;
public static final int MEDIA_TYPE_IMAGE = 1;
private static final int REQUEST_CAMERA_PERMISSION = 1;
private static final int REQUEST_WRITE_PERMISSION = 2;
private FrameLayout cameraPreviewLayout;
private float mDist;
private Bitmap bm;
private float ratio = 9f / 16f;
private Button gallery;
private int SELECT_FILE = 1;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.test_camera);
setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
cameraPreviewLayout = (FrameLayout) findViewById(R.id.camera_preview);
Button captureButton = (Button) findViewById(R.id.button);
gallery = (Button) findViewById(R.id.galleries);
gallery.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
Intent intent = new Intent();
intent.setType("image/*");
intent.setAction(Intent.ACTION_GET_CONTENT);//
startActivityForResult(Intent.createChooser(intent, "Select File"),SELECT_FILE);
}
});
captureButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
camera.takePicture(null, null, pictureCallback);
}
});
}
#Override
protected void onResume() {
super.onResume();
requestCameraPermission();
}
Camera.PictureCallback pictureCallback = new Camera.PictureCallback() {
#Override
public void onPictureTaken(byte[] data, Camera camera) {
bm = BitmapFactory.decodeByteArray(data, 0, data.length);
if (getResources().getConfiguration().orientation == Configuration.ORIENTATION_PORTRAIT) {
// Setting post rotate to 90
Matrix mtx = new Matrix();
mtx.postRotate(90);
bm = Bitmap.createBitmap(bm, 0, 0, bm.getWidth(), bm.getHeight(), mtx, true);
bm = Bitmap.createBitmap(bm, 0, 0, bm.getWidth(), (int) (bm.getWidth() * ratio));
} else {// LANDSCAPE MODE
//No need to reverse width and height
Bitmap scaled = Bitmap.createScaledBitmap(bm, bm.getWidth(), bm.getHeight(), true);
bm = scaled;
}
if (bm == null) {
Toast.makeText(TestCameraActivity.this, "khoong duoc roi", Toast.LENGTH_LONG).show();
return;
}
// capturedImageHolder.setImageBitmap(bm);
Intent intent = new Intent(TestCameraActivity.this, CaptureResultActivity.class);
ByteArrayOutputStream bs = new ByteArrayOutputStream();
bm.compress(Bitmap.CompressFormat.PNG, 60, bs);
intent.putExtra("bitmap", bs.toByteArray());
startActivity(intent);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
requestWritePermission();
} else {
asyncSave();
}
// camera.startPreview();
}
};
public void asyncSave() {
new AsyncTask<Bitmap, Void, Boolean>() {
#Override
protected Boolean doInBackground(Bitmap... bitmaps) {
return saveBitmapImage(bitmaps[0]);
}
#Override
protected void onPostExecute(Boolean aBoolean) {
if (aBoolean) {
Toast.makeText(TestCameraActivity.this, "Save Image Success", Toast.LENGTH_SHORT).show();
} else {
Toast.makeText(TestCameraActivity.this, "Failed to save image...", Toast.LENGTH_SHORT).show();
}
}
}.execute(bm);
}
private boolean saveBitmapImage(Bitmap bitmap) {
File pictureFile = getOutputMediaFile(MEDIA_TYPE_IMAGE);
if (pictureFile == null) {
Log.d("BBB", "Error creating media file, check storage permissions: ");
return false;
}
try {
FileOutputStream fos = new FileOutputStream(pictureFile);
bitmap.compress(Bitmap.CompressFormat.PNG, 100, fos);
// fos.write(data);
fos.close();
galleryAddPic(pictureFile);
return true;
} catch (FileNotFoundException e) {
Log.d("BBB", "File not found: " + e.getMessage());
} catch (IOException e) {
Log.d("BBB", "Error accessing file: " + e.getMessage());
}
return false;
}
private static File getOutputMediaFile(int type) {
File mediaStorageDir = new File(Environment.getExternalStoragePublicDirectory(
Environment.DIRECTORY_PICTURES), "MyCameraApp");
if (!mediaStorageDir.exists()) {
if (!mediaStorageDir.mkdirs()) {
Log.d("MyCameraApp", "failed to create directory");
return null;
}
}
// Create a media file name
String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss").format(new Date());
File mediaFile;
if (type == MEDIA_TYPE_IMAGE) {
mediaFile = new File(mediaStorageDir.getPath() + File.separator +
"IMG_LINH" + timeStamp + ".jpg");
} else {
return null;
}
return mediaFile;
}
// zoom
#Override
public boolean onTouchEvent(MotionEvent event) {
// Get the pointer ID
Camera.Parameters params = camera.getParameters();
int action = event.getAction();
if (event.getPointerCount() > 1) {
// handle multi-touch events
if (action == MotionEvent.ACTION_POINTER_DOWN) {
mDist = getFingerSpacing(event);
} else if (action == MotionEvent.ACTION_MOVE && params.isZoomSupported()) {
camera.cancelAutoFocus();
handleZoom(event, params);
}
} else {
// handle single touch events
if (action == MotionEvent.ACTION_UP) {
handleFocus(event, params);
}
}
return true;
}
private void handleZoom(MotionEvent event, Camera.Parameters params) {
int maxZoom = params.getMaxZoom();
int zoom = params.getZoom();
float newDist = getFingerSpacing(event);
if (newDist > mDist) {
//zoom in
if (zoom < maxZoom)
zoom++;
} else if (newDist < mDist) {
//zoom out
if (zoom > 0)
zoom--;
}
mDist = newDist;
params.setZoom(zoom);
camera.setParameters(params);
}
public void handleFocus(MotionEvent event, Camera.Parameters params) {
int pointerId = event.getPointerId(0);
int pointerIndex = event.findPointerIndex(pointerId);
// Get the pointer's current position
float x = event.getX(pointerIndex);
float y = event.getY(pointerIndex);
List<String> supportedFocusModes = params.getSupportedFocusModes();
if (supportedFocusModes != null && supportedFocusModes.contains(Camera.Parameters.FOCUS_MODE_AUTO)) {
camera.autoFocus(new Camera.AutoFocusCallback() {
#Override
public void onAutoFocus(boolean b, Camera camera) {
// currently set to auto-focus on single touch
}
});
}
}
/**
* Determine the space between the first two fingers
*/
private float getFingerSpacing(MotionEvent event) {
// ...
float x = event.getX(0) - event.getX(1);
float y = event.getY(0) - event.getY(1);
return (float) Math.sqrt(x * x + y * y);
}
//Request Permission
private void requestCameraPermission() {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
if (ContextCompat.checkSelfPermission(this,
Manifest.permission.CAMERA)
!= PackageManager.PERMISSION_GRANTED) {
if (ActivityCompat.shouldShowRequestPermissionRationale(this,
Manifest.permission.CAMERA)) {
} else {
ActivityCompat.requestPermissions(this,
new String[]{Manifest.permission.CAMERA},
REQUEST_CAMERA_PERMISSION);
}
} else {
camera = Camera.open();
mImageSurfaceView = new CameraPreview(this, camera);
cameraPreviewLayout.addView(mImageSurfaceView);
}
} else {
camera = Camera.open();
mImageSurfaceView = new CameraPreview(this, camera);
cameraPreviewLayout.addView(mImageSurfaceView);
}
}
#Override
public void onRequestPermissionsResult(int requestCode, #NonNull String[] permissions,
#NonNull int[] grantResults) {
switch (requestCode) {
case REQUEST_CAMERA_PERMISSION: {
// If request is cancelled, the result arrays are empty.
if (grantResults.length > 0
&& grantResults[0] == PackageManager.PERMISSION_GRANTED) {
camera = Camera.open(0);
mImageSurfaceView = new CameraPreview(this, camera);
cameraPreviewLayout.addView(mImageSurfaceView);
} else {
super.onRequestPermissionsResult(requestCode, permissions, grantResults);
// permission denied, boo! Disable the
// functionality that depends on this permission.
}
return;
}
case REQUEST_WRITE_PERMISSION: {
if (grantResults.length > 0
&& grantResults[0] == PackageManager.PERMISSION_GRANTED) {
asyncSave();
} else {
super.onRequestPermissionsResult(requestCode, permissions, grantResults);
// permission denied, boo! Disable the
// functionality that depends on this permission.
}
return;
}
// other 'case' lines to check for other
// permissions this app might request
}
}
//Request Write Permission
private void requestWritePermission() {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
// Here, thisActivity is the current activity
if (ContextCompat.checkSelfPermission(this,
Manifest.permission.WRITE_EXTERNAL_STORAGE)
!= PackageManager.PERMISSION_GRANTED) {
// Should we show an explanation?
ActivityCompat.requestPermissions(this,
new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE},
REQUEST_WRITE_PERMISSION);
// }
} else {
asyncSave();
}
} else {
//api < 21
}
}
//Add photo to the gallery
private void galleryAddPic(File f) {
Intent mediaScanIntent = new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE);
Uri contentUri = Uri.fromFile(f);
mediaScanIntent.setData(contentUri);
this.sendBroadcast(mediaScanIntent);
}
#Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
try {
if (resultCode == Activity.RESULT_OK) {
if (requestCode == SELECT_FILE)
onSelectFromGalleryResult(data);
}
} catch (Exception e) {
Toast.makeText(this, "Please try again", Toast.LENGTH_LONG)
.show();
}
}
private static Bitmap StringToBitMap(String encodedString){
try {
byte [] encodeByte= Base64.decode(encodedString,Base64.DEFAULT);
Bitmap bitmap=BitmapFactory.decodeByteArray(encodeByte, 0, encodeByte.length);
return bitmap;
} catch(Exception e) {
e.getMessage();
return null;
}
}
private void onSelectFromGalleryResult(Intent data) {
Bitmap bm=null;
if (data != null) {
try {
bm = MediaStore.Images.Media.getBitmap(getApplicationContext().getContentResolver(), data.getData());
} catch (IOException e) {
e.printStackTrace();
}
Intent intent = new Intent(TestCameraActivity.this, CaptureResultActivity.class);
ByteArrayOutputStream bs = new ByteArrayOutputStream();
bm.compress(Bitmap.CompressFormat.PNG, 60, bs);
intent.putExtra("bitmap", bs.toByteArray());
startActivity(intent);
}
}
}
First For open Gallery you need to open as per the API level. After API 19 you need to open gallery in other way.
if (Build.VERSION.SDK_INT < 19) {
Intent intent = new Intent();
intent.setType("image/*");
intent.setAction(Intent.ACTION_GET_CONTENT);
startActivityForResult(Intent.createChooser(intent, "Select Picture"), PICK_IMAGE_REQUEST);
} else {
Intent intent = new Intent(Intent.ACTION_OPEN_DOCUMENT);
intent.addCategory(Intent.CATEGORY_OPENABLE);
intent.setType("image/*");
startActivityForResult(intent, PICK_IMAGE_REQUEST);
}
And on the ActivityResult()
public void onActivityResult(int requestCode, int resultCode, Intent data) {
if (requestCode == PICK_IMAGE_REQUEST
&& resultCode == Activity.RESULT_OK) {
Uri uri = data.getData();
mImageCaptureUri = Uri.fromFile(new File(uriToFilename(uri)));
}
}
private String uriToFilename(Uri uri) {
String path = null;
if (Build.VERSION.SDK_INT < 11) {
path = RealPathUtil.getRealPathFromURI_BelowAPI11(getActivity(), uri);
} else if (Build.VERSION.SDK_INT < 19) {
path = RealPathUtil.getRealPathFromURI_API11to18(getActivity(), uri);
} else {
path = RealPathUtil.getRealPathFromURI_API19(getActivity(), uri);
}
return path;
}
Here is RealPathUtil class
import android.annotation.SuppressLint;
import android.content.Context;
import android.database.Cursor;
import android.net.Uri;
import android.provider.DocumentsContract;
import android.provider.MediaStore;
import android.support.v4.content.CursorLoader;
public class RealPathUtil {
#SuppressLint("NewApi")
public static String getRealPathFromURI_API19(Context context, Uri uri) {
String filePath = "";
if (DocumentsContract.isDocumentUri(context, uri)) {
String wholeID = DocumentsContract.getDocumentId(uri);
// Split at colon, use second item in the array
String[] splits = wholeID.split(":");
if (splits.length == 2) {
String id = splits[1];
String[] column = { MediaStore.Images.Media.DATA };
// where id is equal to
String sel = MediaStore.Images.Media._ID + "=?";
Cursor cursor = context.getContentResolver().query(MediaStore.Images.Media.EXTERNAL_CONTENT_URI,
column, sel, new String[] { id }, null);
int columnIndex = cursor.getColumnIndex(column[0]);
if (cursor.moveToFirst()) {
filePath = cursor.getString(columnIndex);
}
cursor.close();
}
} else {
filePath = uri.getPath();
}
return filePath;
}
#SuppressLint("NewApi")
public static String getRealPathFromURI_API11to18(Context context, Uri contentUri) {
String[] proj = { MediaStore.Images.Media.DATA };
String result = null;
CursorLoader cursorLoader = new CursorLoader(context, contentUri, proj, null, null, null);
Cursor cursor = cursorLoader.loadInBackground();
if (cursor != null) {
int column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
cursor.moveToFirst();
result = cursor.getString(column_index);
}
return result;
}
public static String getRealPathFromURI_BelowAPI11(Context context, Uri contentUri) {
String[] proj = { MediaStore.Images.Media.DATA };
Cursor cursor = context.getContentResolver().query(contentUri, proj, null, null, null);
int column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
cursor.moveToFirst();
return cursor.getString(column_index);
}
}
I am new to android. I just downloaded an example camera program. I can take one image each time I click the "capture" button.
Now I want to know if it is possible to take two images continuously (one with flash and one without flash). Does anybody have a hint on how to do that? Thanks a lot.
I posted the sample code here:
public class AndroidCameraExample extends Activity {
private Camera mCamera;
private CameraPreview mPreview;
private PictureCallback mPicture;
private Button capture, switchCamera;
private Context myContext;
private LinearLayout cameraPreview;
private boolean cameraFront = false;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
myContext = this;
initialize();
}
private int findFrontFacingCamera() {
int cameraId = -1;
// Search for the front facing camera
int numberOfCameras = Camera.getNumberOfCameras();
for (int i = 0; i < numberOfCameras; i++) {
CameraInfo info = new CameraInfo();
Camera.getCameraInfo(i, info);
if (info.facing == CameraInfo.CAMERA_FACING_FRONT) {
cameraId = i;
cameraFront = true;
break;
}
}
return cameraId;
}
private int findBackFacingCamera() {
int cameraId = -1;
//Search for the back facing camera
//get the number of cameras
int numberOfCameras = Camera.getNumberOfCameras();
//for every camera check
for (int i = 0; i < numberOfCameras; i++) {
CameraInfo info = new CameraInfo();
Camera.getCameraInfo(i, info);
if (info.facing == CameraInfo.CAMERA_FACING_BACK) {
cameraId = i;
cameraFront = false;
break;
}
}
return cameraId;
}
public void onResume() {
super.onResume();
if (!hasCamera(myContext)) {
Toast toast = Toast.makeText(myContext, "Sorry, your phone does not have a camera!", Toast.LENGTH_LONG);
toast.show();
finish();
}
if (mCamera == null) {
//if the front facing camera does not exist
if (findFrontFacingCamera() < 0) {
Toast.makeText(this, "No front facing camera found.", Toast.LENGTH_LONG).show();
switchCamera.setVisibility(View.GONE);
}
mCamera = Camera.open(findBackFacingCamera());
mPicture = getPictureCallback();
mPreview.refreshCamera(mCamera);
}
}
public void initialize() {
cameraPreview = (LinearLayout) findViewById(R.id.camera_preview);
mPreview = new CameraPreview(myContext, mCamera);
cameraPreview.addView(mPreview);
capture = (Button) findViewById(R.id.button_capture);
capture.setOnClickListener(captrureListener);
switchCamera = (Button) findViewById(R.id.button_ChangeCamera);
switchCamera.setOnClickListener(switchCameraListener);
}
OnClickListener switchCameraListener = new OnClickListener() {
#Override
public void onClick(View v) {
//get the number of cameras
int camerasNumber = Camera.getNumberOfCameras();
if (camerasNumber > 1) {
//release the old camera instance
//switch camera, from the front and the back and vice versa
releaseCamera();
chooseCamera();
} else {
Toast toast = Toast.makeText(myContext, "Sorry, your phone has only one camera!", Toast.LENGTH_LONG);
toast.show();
}
}
};
public void chooseCamera() {
//if the camera preview is the front
if (cameraFront) {
int cameraId = findBackFacingCamera();
if (cameraId >= 0) {
//open the backFacingCamera
//set a picture callback
//refresh the preview
mCamera = Camera.open(cameraId);
mPicture = getPictureCallback();
mPreview.refreshCamera(mCamera);
}
} else {
int cameraId = findFrontFacingCamera();
if (cameraId >= 0) {
//open the backFacingCamera
//set a picture callback
//refresh the preview
mCamera = Camera.open(cameraId);
mPicture = getPictureCallback();
mPreview.refreshCamera(mCamera);
}
}
}
#Override
protected void onPause() {
super.onPause();
//when on Pause, release camera in order to be used from other applications
releaseCamera();
}
private boolean hasCamera(Context context) {
//check if the device has camera
if (context.getPackageManager().hasSystemFeature(PackageManager.FEATURE_CAMERA)) {
return true;
} else {
return false;
}
}
private PictureCallback getPictureCallback() {
PictureCallback picture = new PictureCallback() {
#Override
public void onPictureTaken(byte[] data, Camera camera) {
//make a new picture file
File pictureFile = getOutputMediaFile();
if (pictureFile == null) {
return;
}
try {
//write the file
FileOutputStream fos = new FileOutputStream(pictureFile);
fos.write(data);
fos.close();
Toast toast = Toast.makeText(myContext, "Picture saved: " + pictureFile.getName(), Toast.LENGTH_LONG);
toast.show();
} catch (FileNotFoundException e) {
} catch (IOException e) {
}
//refresh camera to continue preview
mPreview.refreshCamera(mCamera);
}
};
return picture;
}
OnClickListener captrureListener = new OnClickListener() {
#Override
public void onClick(View v) {
Camera.Parameters parameters = mCamera.getParameters();
parameters.setFlashMode(Camera.Parameters.FLASH_MODE_ON);
mCamera.setParameters(parameters);
mCamera.takePicture(null, null, mPicture);
}
};
//make picture and save to a folder
private static File getOutputMediaFile() {
//make a new file directory inside the "sdcard" folder
File mediaStorageDir = new File("/sdcard/", "JCG Camera");
//if this "JCGCamera folder does not exist
if (!mediaStorageDir.exists()) {
//if you cannot make this folder return
if (!mediaStorageDir.mkdirs()) {
return null;
}
}
//take the current timeStamp
String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss").format(new Date());
File mediaFile;
//and make a media file:
mediaFile = new File(mediaStorageDir.getPath() + File.separator + "IMG_" + timeStamp + ".jpg");
return mediaFile;
}
private void releaseCamera() {
// stop and release camera
if (mCamera != null) {
mCamera.release();
mCamera = null;
}
}
}
I developed an app in which the user can capture an image either from camera or gallery. For that, the user can click on the imageview, then a dialog shows up and the user can choose to capture from camera or gallery.
If the user chooses to capture the image from gallery or with the front camera then it works fine and the captured image shows up in the imageview. But if the user chooses the back camera and takes the photo and return back to activity, then the image does not show up in the imageview at all.
Here my full source code:
public class PostActivity extends Activity implements OnClickListener {
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_INDETERMINATE_PROGRESS);
setContentView(R.layout.post);
image = (ImageView) findViewById(R.id.image);
ab = getActionBar();
ab.setDisplayHomeAsUpEnabled(true);
image.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
show(); //here the dialog box is called, to choose the capture option
}
});
image.setTag(null);
captureImageInitialization();
}
private void show() {
dialog.show();
}
private void captureImageInitialization() {
final Item[] items = {
new Item("Camera", R.drawable.ic_action_camera_dark),
new Item("Gallery", R.drawable.ic_action_collection),
};
ListAdapter adapter = new ArrayAdapter<Item>(this,
android.R.layout.select_dialog_item, android.R.id.text1, items) {
public View getView(int position, View convertView, ViewGroup parent) {
// User super class to create the View
View v = super.getView(position, convertView, parent);
TextView tv = (TextView) v.findViewById(android.R.id.text1);
// Put the image on the TextView
tv.setCompoundDrawablesWithIntrinsicBounds(
items[position].icon, 0, 0, 0);
// Add margin between image and text (support various screen
// densities)
int dp5 = (int) (5 * getResources().getDisplayMetrics().density + 0.5f);
tv.setCompoundDrawablePadding(dp5);
return v;
}
};
AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setTitle("Take Image from ...");
builder.setAdapter(adapter, new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int item) {
if (item == 0) {
Intent intent = new Intent(
"android.media.action.IMAGE_CAPTURE");
startActivityForResult(intent, PICK_FROM_CAMERA);
} else {
Intent intent = new Intent();
intent.setType("image/*");
intent.setAction(Intent.ACTION_GET_CONTENT);
startActivityForResult(intent, PICK_FROM_FILE);
}
}
});
dialog = builder.create();
}
public static class Item {
public final String text;
public final int icon;
public Item(String text, Integer icon) {
this.text = text;
this.icon = icon;
}
#Override
public String toString() {
return text;
}
}
#Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
switch (requestCode) {
case PICK_FROM_CAMERA:
mImageCaptureUri = data.getData();
imagepath = getPath(mImageCaptureUri);
BitmapFactory.Options options0 = new BitmapFactory.Options();
options0.inSampleSize = 2;
options0.inScaled = false;
options0.inDither = false;
options0.inPreferredConfig = Bitmap.Config.ARGB_8888;
bmp = BitmapFactory.decodeFile(imagepath, options0);
Matrix matrix = new Matrix();
ExifInterface exif;
int m = 0;
try {
exif = new ExifInterface(imagepath);
int orientation = exif.getAttributeInt(
ExifInterface.TAG_ORIENTATION, 1);
Log.d("EXIF", "Exif: " + orientation);
if (orientation == 6) {
m = 90;
} else if (orientation == 3) {
m = 180;
} else if (orientation == 8) {
m = 270;
}
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
matrix.postRotate(m);
bmp = Bitmap.createBitmap(bmp, 0, 0, bmp.getWidth(),
bmp.getHeight(), matrix, false);
ByteArrayOutputStream baos0 = new ByteArrayOutputStream();
image.setImageBitmap(getRoundedCornerBitmap(bmp));
image.setTag("1");
bmp.compress(Bitmap.CompressFormat.JPEG, 100, baos0);
byte[] imageBytes0 = baos0.toByteArray();
krt1 = Base64.encodeToString(imageBytes0, Base64.DEFAULT);
break;
case PICK_FROM_FILE:
mImageCaptureUri = data.getData();
imagepath = getPath(mImageCaptureUri);
BitmapFactory.Options options = new BitmapFactory.Options();
options.inSampleSize = 2;
options.inScaled = false;
options.inDither = false;
options.inPreferredConfig = Bitmap.Config.ARGB_8888;
bmp = BitmapFactory.decodeFile(imagepath, options);
ExifInterface exif2;
int m2 = 0;
try {
exif2 = new ExifInterface(imagepath);
int orientation = exif2.getAttributeInt(
ExifInterface.TAG_ORIENTATION, 1);
Log.d("EXIF", "Exif: " + orientation);
if (orientation == 6) {
m2 = 90;
} else if (orientation == 3) {
m2 = 180;
} else if (orientation == 8) {
m2 = 270;
}
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
ByteArrayOutputStream baos2 = new ByteArrayOutputStream();
Matrix matrix2 = new Matrix();
matrix2.postRotate(m2);
bmp = Bitmap.createBitmap(bmp, 0, 0, bmp.getWidth(),
bmp.getHeight(), matrix2, false);
image.setImageBitmap(getRoundedCornerBitmap(bmp));
image.setTag("1");
bmp.compress(Bitmap.CompressFormat.JPEG, 100, baos2);
byte[] imageBytes2 = baos2.toByteArray();
krt1 = Base64.encodeToString(imageBytes2, Base64.DEFAULT);
break;
}
}
public String getPath(Uri uri) {
String res = null;
String[] proj = { MediaStore.Images.Media.DATA };
Cursor cursor = getApplicationContext().getContentResolver().query(uri,
proj, null, null, null);
if (cursor.moveToFirst()) {
;
int column_index = cursor
.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
res = cursor.getString(column_index);
}
cursor.close();
return res;
}
This issue with the back camera is really weird, because I never had such an issue. (BTW tested on Samsung device). Any help is appreciated.
I am using this code for taking the image from front facing camera -
public class CameraController {
private Context context;
private boolean hasCamera;
private Camera camera;
private int cameraId;
public CameraController(Context c){
context = c.getApplicationContext();
if(context.getPackageManager().hasSystemFeature(PackageManager.FEATURE_CAMERA)){
cameraId = getFrontCameraId();
if(cameraId != -1){
hasCamera = true;
}else{
hasCamera = false;
}
}else{
hasCamera = false;
}
}
public boolean hasCamera(){
return hasCamera;
}
public void getCameraInstance(){
camera = null;
if(hasCamera){
try{
camera = Camera.open(cameraId);
prepareCamera();
}
catch(Exception e){
hasCamera = false;
}
}
}
public void takePicture(){
if(hasCamera){
camera.takePicture(null,null,mPicture);
}
}
public void releaseCamera(){
if(camera != null){
camera.stopPreview();
camera.release();
camera = null;
}
}
private int getFrontCameraId(){
int camId = -1;
int numberOfCameras = Camera.getNumberOfCameras();
CameraInfo ci = new CameraInfo();
for(int i = 0;i < numberOfCameras;i++){
Camera.getCameraInfo(i,ci);
if(ci.facing == CameraInfo.CAMERA_FACING_FRONT){
camId = i;
}
}
return camId;
}
private void prepareCamera(){
SurfaceView view = new SurfaceView(context);
try{
camera.setPreviewDisplay(view.getHolder());
}catch(IOException e){
throw new RuntimeException(e);
}
camera.startPreview();
Camera.Parameters params = camera.getParameters();
params.setJpegQuality(100);
camera.setParameters(params);
}
private PictureCallback mPicture = new PictureCallback(){
#Override
public void onPictureTaken(byte[] data, Camera camera){
File pictureFile = getOutputMediaFile();
if(pictureFile == null){
Log.d("TEST", "Error creating media file, check storage permissions");
return;
}
try{
Log.d("TEST","File created");
FileOutputStream fos = new FileOutputStream(pictureFile);
fos.write(data);
fos.close();
}catch(FileNotFoundException e){
Log.d("TEST","File not found: "+e.getMessage());
} catch (IOException e){
Log.d("TEST","Error accessing file: "+e.getMessage());
}
}
};
private File getOutputMediaFile(){
// To be safe, you should check that the SDCard is mounted
// using Environment.getExternalStorageState() before doing this.
File mediaStorageDir = new File(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES),"MyCameraApp");
// This location works best if you want the created images to be shared
// between applications and persist after your app has been uninstalled.
// Create the storage directory if it does not exist
if(!mediaStorageDir.exists()){
if(!mediaStorageDir.mkdirs()){
return null;
}
}
// Create a media file name
String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss").format(new Date());
File mediaFile;
mediaFile = new File(mediaStorageDir.getPath()+File.separator+"IMG_"+timeStamp+".jpg");
return mediaFile;
}
}
Hope this helps you.
I am having a NullPointerException in my android code on this section
String title = titleEt.getText().toString();
String description = descriptionEt.getText().toString();
Log.i("title",title);
Log.i("description",description);
audioRecordPasser.onAudioRecordPass(title, "hiphop", description, fileUri.getPath());
getDialog().dismiss();
The exception is on the line
audioRecordPasser.onAudioRecordPass(title, "hiphop", description, fileUri.getPath());
audioRecordPasser is an interface.
The complete code implementation is
public class UploadFragment extends DialogFragment implements AdapterView.OnItemSelectedListener, View.OnClickListener {
Spinner genres;
ImageView photo;
TextView submit;
String fileName = "";
EditText titleEt, descriptionEt;
private static final String KEY = "choice";
public Uri fileUri; // file url to store image/video
OnAudioRecordPass audioRecordPasser;
public UploadFragment(){
}
#Override
public Dialog onCreateDialog(Bundle savedInstanceState) {
AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
// Get the layout inflater
LayoutInflater inflater = getActivity().getLayoutInflater();
View v = inflater.inflate(R.layout.fragment_upload, null);
builder.setView(v);
submit = (TextView) v.findViewById(R.id.upload_textView_submit);
genres = (Spinner) v.findViewById(R.id.upload_spinner_genre);
photo = (ImageView) v.findViewById(R.id.upload_imageView_photo);
titleEt = (EditText) v.findViewById(R.id.upload_edittext_title);
descriptionEt = (EditText) v.findViewById(R.id.upload_editText_description);
ArrayAdapter<String> dataAdapter = new ArrayAdapter<String>(getActivity(),
R.layout.ngoma_spinner, getResources().getStringArray(R.array.genres));
dataAdapter
.setDropDownViewResource(android.R.layout.simple_dropdown_item_1line);
genres.setAdapter(dataAdapter);
genres.setOnItemSelectedListener(this);
submit.setOnClickListener(this);
photo.setOnClickListener(this);
return builder.create();
}
#Override
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
}
#Override
public void onNothingSelected(AdapterView<?> parent) {
}
private static final int INT_CODE = 1;
#Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.upload_textView_submit:
Log.i("URI", fileUri.getPath());
// audioRecordPasser.onAudioRecordPass(titleEt.getText().toString(),"hiphop",descriptionEt.getText().toString(),fileUri.getPath());
if (validateInput()==false){
Toast.makeText(getActivity(),"Fields cannot be blank.",Toast.LENGTH_SHORT).show();
}
else {
String title = titleEt.getText().toString();
String description = descriptionEt.getText().toString();
Log.i("title",title);
Log.i("description",description);
audioRecordPasser.onAudioRecordPass(title, "hiphop", description, fileUri.getPath());
getDialog().dismiss();
}
break;
case R.id.upload_imageView_photo:
UploadPhotoDialog uploadDialog = new UploadPhotoDialog();
uploadDialog.setTargetFragment(this, INT_CODE);
uploadDialog.show(getActivity().getSupportFragmentManager(), "uploadPhoto");
break;
}
}
/**
* **************************************************************************************************
*/
private static final int CAMERA_CAPTURE_IMAGE_REQUEST_CODE = 100;
public static final int MEDIA_TYPE_IMAGE = 1;
private static int RESULT_LOAD_IMAGE = 1;
/**
* Select image from gallery
*/
private void selectFromGallery() {
Intent i = new Intent(Intent.ACTION_PICK,
android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
startActivityForResult(i, RESULT_LOAD_IMAGE);
}
/**
* Capturing Camera Image will lauch camera app requrest image capture
*/
private void captureImage() {
Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
fileUri = getOutputMediaFileUri(MEDIA_TYPE_IMAGE);
intent.putExtra(MediaStore.EXTRA_OUTPUT, fileUri);
// start the image capture Intent
startActivityForResult(intent, CAMERA_CAPTURE_IMAGE_REQUEST_CODE);
}
/**
* Here we store the file url as it will be null after returning from camera
* app
*/
// directory name to store captured images and videos
private static final String IMAGE_DIRECTORY_NAME = "ngoma";
#Override
public void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
// save file url in bundle as it will be null on screen orientation
// changes
outState.putParcelable("file_uri", fileUri);
}
/*
#Override
protected void onRestoreInstanceState(Bundle savedInstanceState) {
super.onRestoreInstanceState(savedInstanceState);
// get the file url
fileUri = savedInstanceState.getParcelable("file_uri");
}*/
#Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
// get the file url
//fileUri = savedInstanceState.getParcelable("file_uri");
}
/**
* Receiving activity result method will be called after closing the camera
*/
#Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
// if the result is capturing Image
if (requestCode == CAMERA_CAPTURE_IMAGE_REQUEST_CODE) {
if (resultCode == Activity.RESULT_OK) {
// successfully captured the image
// display it in image view
previewCapturedImage();
} else if (resultCode == Activity.RESULT_CANCELED) {
// user cancelled Image capture
Toast.makeText(getActivity().getApplicationContext(),
"User cancelled image capture", Toast.LENGTH_SHORT)
.show();
} else {
// failed to capture image
Toast.makeText(getActivity().getApplicationContext(),
"Sorry! Failed to capture image", Toast.LENGTH_SHORT)
.show();
}
} else if (requestCode == RESULT_LOAD_IMAGE && resultCode == Activity.RESULT_OK
&& null != data) {
Uri selectedImage = data.getData();
fileUri = selectedImage;
String[] filePathColumn = {MediaStore.Images.Media.DATA};
Cursor cursor = getActivity().getContentResolver().query(selectedImage,
filePathColumn, null, null, null);
cursor.moveToFirst();
int columnIndex = cursor.getColumnIndex(filePathColumn[0]);
String picturePath = cursor.getString(columnIndex);
cursor.close();
// String picturePath contains the path of selected Image
previewFromGallery(picturePath);
}
}
/**
* Display image from a path to ImageView
*/
private void previewCapturedImage() {
try {
// bimatp factory
BitmapFactory.Options options = new BitmapFactory.Options();
// downsizing image as it throws OutOfMemory Exception for larger
// images
options.inSampleSize = 8;
final Bitmap bitmap = BitmapFactory.decodeFile(fileUri.getPath(),
options);
Log.i("previewCapturedImage", fileUri.getPath());
photo.setImageBitmap(bitmap);
} catch (NullPointerException e) {
e.printStackTrace();
}
}
private void previewFromGallery(String picturePath) {
photo.setImageBitmap(BitmapFactory.decodeFile(picturePath));
}
/**
* ------------ Helper Methods ----------------------
* */
/**
* Creating file uri to store image/video
*/
public Uri getOutputMediaFileUri(int type) {
fileUri = Uri.fromFile(getOutputMediaFile(type));
Log.i("getOutputMediaFileUri", fileUri.getPath());
return fileUri;
}
/**
* returning image / video
*/
private static File getOutputMediaFile(int type) {
// External sdcard location
File mediaStorageDir = new File(
Environment
.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES),
IMAGE_DIRECTORY_NAME);
// Create the storage directory if it does not exist
if (!mediaStorageDir.exists()) {
if (!mediaStorageDir.mkdirs()) {
Log.d(IMAGE_DIRECTORY_NAME, "Oops! Error creating "
+ IMAGE_DIRECTORY_NAME + " directory.");
return null;
}
}
// Create a media file name
String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss",
Locale.getDefault()).format(new Date());
File mediaFile;
if (type == MEDIA_TYPE_IMAGE) {
mediaFile = new File(mediaStorageDir.getPath() + File.separator
+ "IMG_" + timeStamp + ".jpg");
} else {
return null;
}
return mediaFile;
}
public void choiceSelector(String data) {
if (data.equalsIgnoreCase("camera")) {
captureImage();
} else if (data.equalsIgnoreCase("gallery")) {
selectFromGallery();
}
}
public interface OnAudioRecordPass {
public void onAudioRecordPass(String title, String genre, String description, String photouri);
}
#Override
public void onAttach(Activity activity) {
super.onAttach(activity);
// This makes sure that the container activity has implemented
// the callback interface. If not, it throws an exception
try {
audioRecordPasser = (OnAudioRecordPass) activity;
} catch (ClassCastException e) {
throw new ClassCastException(activity.toString()
+ " must implement OnAudioRecordPass");
}
}
private boolean validateInput() {
if (titleEt.getText().toString().equalsIgnoreCase("") || descriptionEt.getText().toString().equalsIgnoreCase("")) {
return false;
} else {
return true;
}
}
}
Everything runs fine.In my logcat, I can see the values of title and desription and fileUri.getPath() variables.What could be the issue?
The logcat content
10-31 15:42:44.032 4101-4101/ngoma.android.shimba.com.ngoma E/AndroidRuntime﹕ FATAL EXCEPTION: main
java.lang.NullPointerException
at com.shimba.android.ngoma.activities.MainActivity.onAudioRecordPass(MainActivity.java:516)
at com.shimba.android.ngoma.fragments.UploadFragment.onClick(UploadFragment.java:101)
at android.view.View.performClick(View.java:3511)
at android.view.View$PerformClick.run(View.java:14105)
at android.os.Handler.handleCallback(Handler.java:605)
at android.os.Handler.dispatchMessage(Handler.java:92)
at android.os.Looper.loop(Looper.java:137)
at android.app.ActivityThread.main(ActivityThread.java:4440)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:511)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:787)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:554)
at dalvik.system.NativeStart.main(Native Method)
The problem is with the parameter fileUri.getPath()
May be this is not properly initialized and as a result its value is null
Check the value of fileUri variable value before passing it to the function.
This will solve your problem
In my app, I' using Tab. There are three tabs. In which 3rd tab is Activity group which has two activities. In first activity, there are two options for user. User can choose image from camera or from gallery. After selecting an image, user should move to child activity, which will display selected image in that activity. Till this app is working fine. But only problem here I'm facing is, image is not being cleared when I move back to parent activity from child activity. Means once I choose image from gallery/camera, user moves to child activity, and image is being displayed in child activity. Now when I press back button from child activity, user moves back to parent activity and again if user selects different image from galley/camera, that different image is not there in child activity. The previous image is there in child activity. Below is my code.
ABCGroup.java
public class ABCGroup extends ActivityGroup{
public static ABCGroup group;
private ArrayList<View> history;
View view;
int column_index;
#SuppressWarnings("deprecation")
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
this.history = new ArrayList<View>();
group = this;
view = getLocalActivityManager().startActivity("ParentActivity", new Intent(ABCGroup.this, Tab1.class).addFlags(Intent.FLAG_ACTIVITY_NO_HISTORY)).getDecorView();
replaceView(view);
}
public void replaceView(View v) {
history.add(v);
setContentView(v);
}
public void back() {
if(history.size() > 0)
{
history.remove(history.size()-1);
if(history.size()<=0)
{
finish();
}
else
{
setContentView(history.get(history.size()-1));
}
}
else
{
finish();
}
}
#Override
public void onBackPressed() {
ABCGroup.group.back();
}
#Override
public boolean onKeyDown(int keyCode, KeyEvent event){
if (keyCode == KeyEvent.KEYCODE_BACK){
ABCGroup.group.back();
return true;
}
return super.onKeyDown(keyCode, event);
}
#Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
InputStream stream = null;
if (requestCode == Tab1.REQUEST_ID && resultCode == Activity.RESULT_OK) {
try
{
stream = getContentResolver().openInputStream(data.getData());
Bitmap original = null;
original= BitmapFactory.decodeStream(stream);
Uri selectedImageUri = data.getData();
String selectedImagePath = getPath(selectedImageUri);
}
catch (Exception e)
{
e.printStackTrace();
}
if (stream != null)
{
try
{
stream.close();
}
catch (Exception e)
{
e.printStackTrace();
}
}
}
if (requestCode == 3 && resultCode == Activity.RESULT_OK)
{
getContentResolver().notifyChange(Tab1.mUri, null);
ContentResolver cr = getContentResolver();
try
{
Tab1.mPhoto = android.provider.MediaStore.Images.Media.getBitmap(cr, Tab1.mUri);
Second.bmp = Tab1.mPhoto;
ByteArrayOutputStream bytes = new ByteArrayOutputStream();
Tab1.mPhoto.compress(Bitmap.CompressFormat.JPEG, 100, bytes);
File direct = new File(Environment.getExternalStorageDirectory() + "/ABCGroup");
String mydate = java.text.DateFormat.getDateTimeInstance().format(Calendar.getInstance().getTime());
Toast.makeText(getBaseContext(), "Time :" + mydate, 5000).show();
if(!direct.exists())
{
direct.mkdir();
File file = new File(Environment.getExternalStorageDirectory()+File.separator + "/ABCGroup/image" + mydate +".jpg");
file.createNewFile();
FileOutputStream fo = new FileOutputStream(file);
fo.write(bytes.toByteArray());
fo.close();
}
else
{
File file = new File(Environment.getExternalStorageDirectory()+File.separator + "/ABCGroup/image" + mydate +".jpg");
file.createNewFile();
FileOutputStream fo = new FileOutputStream(file);
fo.write(bytes.toByteArray());
fo.close();
}
View mview = ABCGroup.group.getLocalActivityManager().startActivity("activity3", new Intent(ABCGroup.this, Second.class).addFlags(Intent.FLAG_ACTIVITY_NO_HISTORY)).getDecorView();
replaceView(mview);
}
catch (Exception e)
{
Toast.makeText(this, e.getMessage(), Toast.LENGTH_SHORT).show();
}
}
}
public String getPath(Uri uri) {
String[] projection = { MediaStore.Images.Media.DATA };
Cursor cursor = managedQuery(uri, projection, null, null, null);
column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
cursor.moveToFirst();
SharedPreferences preferences = PreferenceManager.getDefaultSharedPreferences(getBaseContext());
SharedPreferences.Editor editor = preferences.edit();
editor.putString("data", cursor.getString(column_index) );
editor.commit();
View mview = ABCGroup.group.getLocalActivityManager().startActivity("activity3", new Intent(ABCGroup.this, Second.class).addFlags(Intent.FLAG_ACTIVITY_NO_HISTORY)).getDecorView();
replaceView(mview);
return cursor.getString(column_index);
}
public void onResume()
{
super.onResume();
column_index = 0;
}
}
Tab1.java
public class Tab1 extends ActivityGroup {
Button gallery, camera;
private ArrayList<View> myActivityHistory;
ImageView iv;
private static final int TAKE_PICTURE = 3;
public static final int REQUEST_ID = 1;
private static final int HALF = 2;
public static Uri mUri;
public static Bitmap mPhoto;
int i = 0;
#SuppressWarnings("deprecation")
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
//setContentView(R.layout.tab1);
View viewToLoad = LayoutInflater.from(Tab1.this.getParent()).inflate(R.layout.tab1, null);
Tab1.this.setContentView(viewToLoad);
myActivityHistory = new ArrayList<View>();
gallery = (Button)viewToLoad.findViewById(R.id.gallery);
camera = (Button)viewToLoad.findViewById(R.id.camera);
iv = (ImageView)viewToLoad.findViewById(R.id.iv);
gallery.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v)
{
Intent intent = new Intent();
intent.setAction(Intent.ACTION_GET_CONTENT);
intent.addCategory(Intent.CATEGORY_OPENABLE);
intent.setType("image/*");
ABCGroup.group.startActivityForResult(intent, REQUEST_ID);
}
});
camera.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
Intent i = new Intent("android.media.action.IMAGE_CAPTURE");
File f = new File(Environment.getExternalStorageDirectory(), "photo.jpg");
i.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(f));
mUri = Uri.fromFile(f);
ABCGroup.group.startActivityForResult(i, TAKE_PICTURE);
}
});
}
public void replaceContentView(String id, Intent newIntent)
{
View mview = ABCGroup.group.getLocalActivityManager().startActivity(id,newIntent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TASK)).getDecorView();
ABCGroup.group.replaceView(mview);
}
}
Second.java
public class Second extends Activity {
public static Bitmap bmp;
Bitmap myBitmap;
String path;
ImageView iv;
int count = 0;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.second);
View viewToLoad = LayoutInflater.from(Second.this.getParent()).inflate(R.layout.second, null);
Second.this.setContentView(viewToLoad);
Button btn = (Button)viewToLoad.findViewById(R.id.button1);
iv = (ImageView)viewToLoad.findViewById(R.id.imageView1);
iv.setImageBitmap(bmp);
SharedPreferences preferences = PreferenceManager.getDefaultSharedPreferences(getBaseContext());
path = preferences.getString("data", "");
File imgFile = new File(path);
if(imgFile.exists()){
Toast.makeText(getBaseContext(), "" + path, 1000).show();
myBitmap = BitmapFactory.decodeFile(imgFile.getAbsolutePath());
iv.setImageBitmap(myBitmap);
}
btn.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
ABCGroup.group.back();
}
});
}
#Override
public void onBackPressed() {
super.onBackPressed();
Intent intent = new Intent(Second.this, Tab1.class);
Tab1 parentActivity = (Tab1)getParent();
parentActivity.replaceContentView("Profile", new Intent(Second.this, Tab1.class).addFlags(Intent.FLAG_ACTIVITY_NO_HISTORY ) );
}
public void onResume()
{
super.onResume();
}
}
Finally I got the answer
public void onResume()
{
super.onResume();
SharedPreferences preferences = PreferenceManager.getDefaultSharedPreferences(getBaseContext());
path = preferences.getString("data", "");
imgFile = new File(path);
Toast.makeText(getBaseContext(), "" + path, 2000).show();
if(imgFile.exists())
{
myBitmap = BitmapFactory.decodeFile(imgFile.getAbsolutePath());
iv.setImageBitmap(myBitmap);
}
}