i want to switch between the front and back cameras on a button click .
when any one of the camera's is open , i need to release it and open the other one .
could anyone tell me the block of code to switch ?
Thank you in advance . . . .
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<Button
android:id="#+id/Button01"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_centerHorizontal="true"
android:background="#drawable/camera_btn"/>
<Button
android:id="#+id/Button02"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_alignParentRight="true"
android:background="#drawable/front_back_btn"/>
<ImageView
android:id="#+id/ImageView01"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_above="#+id/Button01"
android:contentDescription="#string/app_name">
</ImageView>
<com.example.surfacecamera.CameraView
android:id="#+id/CameraView01"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true" />
</RelativeLayout>
THIS IS MY ACTIVITY
and main java class is
package com.example.surfacecamera;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import android.app.Activity;
import android.os.Bundle;
import android.os.Environment;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.ImageView;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Bitmap.CompressFormat;
import android.hardware.Camera;
public class MainActivity extends Activity implements OnClickListener, Camera.PictureCallback {
CameraView cameraView;
ImageView imv;
Button b2 ;
int cameraCount = 0;
int camIdx = 0;
Camera cam;
Camera.CameraInfo cameraInfo = new Camera.CameraInfo();
#Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
//setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
setContentView(R.layout.activity_main);
Button pictureButton = (Button) this.findViewById(R.id.Button01);
Button b2 = (Button) this.findViewById(R.id.Button02);
imv = (ImageView) this.findViewById(R.id.ImageView01);
cameraView = (CameraView) this.findViewById(R.id.CameraView01);
cameraCount = Camera.getNumberOfCameras();
b2.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View arg0) {
}
});
pictureButton.setOnClickListener(this);
}
// From the OnClickListener
public void onClick(View v)
{
cameraView.takePicture(null, null, this);
}
// From the Camera.PictureCallback
public void onPictureTaken(byte[] data, Camera camera)
{
Bitmap bmp = BitmapFactory.decodeByteArray(data, 0, data.length);
imv.setImageBitmap(bmp);
String filename = "apicture.jpg";
File pictureFile = new File(Environment.getExternalStorageDirectory().getAbsolutePath() + "/" + filename);
try
{
FileOutputStream pfos = new FileOutputStream(pictureFile);
bmp.compress(CompressFormat.JPEG, 75, pfos);
pfos.flush();
pfos.close();
}
catch (FileNotFoundException e)
{
e.printStackTrace();
}
catch (IOException e)
{
e.printStackTrace();
}
}
}
and another class
package com.example.surfacecamera;
import java.io.IOException;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import android.content.Context;
import android.content.res.Configuration;
import android.hardware.Camera;
import android.hardware.Camera.Parameters;
import android.util.AttributeSet;
import android.util.Log;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
public class CameraView extends SurfaceView implements SurfaceHolder.Callback
{
SurfaceHolder mHolder;
int width;
int height;
Camera mCamera;
public CameraView(Context context, AttributeSet attrs)
{
super(context,attrs);
holderCreation();
}
public CameraView(Context context)
{
super(context);
holderCreation();
}
public void takePicture(Camera.ShutterCallback shutter, Camera.PictureCallback raw, Camera.PictureCallback jpeg)
{
mCamera.takePicture(shutter, raw, jpeg);
}
#SuppressWarnings("deprecation")
public void holderCreation()
{
// Install a SurfaceHolder.Callback so we get notified when the
// underlying surface is created and destroyed.
mHolder = getHolder();
mHolder.addCallback(this);
mHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
}
public void surfaceCreated(SurfaceHolder holder)
{
// The Surface has been created, acquire the camera and tell it where to draw.
mCamera = Camera.open();
Parameters params = mCamera.getParameters();
// If we aren't landscape (the default), tell the camera we want portrait mode
if (this.getResources().getConfiguration().orientation !=
Configuration.ORIENTATION_LANDSCAPE)
{
params.set("orientation", "portrait"); // "landscape"
// And Rotate the final picture if possible
// This works on 2.0 and higher only
//params.setRotation(90);
// Use reflection to see if it exists and to call it so you can support older versions
try {
Method rotateSet = Camera.Parameters.class.getMethod(
"setRotation", new Class[] { Integer.TYPE } );
Object arguments[] = new Object[] { new Integer(90) };
rotateSet.invoke(params, arguments);
} catch (NoSuchMethodException nsme) {
// Older Device
Log.v("CameraView","No Set Rotation");
} catch (IllegalArgumentException e) {
Log.v("CameraView","Exception IllegalArgument");
} catch (IllegalAccessException e) {
Log.v("CameraView","Illegal Access Exception");
} catch (InvocationTargetException e) {
Log.v("CameraView","Invocation Target Exception");
}
}
mCamera.setParameters(params);
try
{
mCamera.setPreviewDisplay(holder);
}
catch (IOException exception)
{
mCamera.release();
mCamera = null;
}
}
public void surfaceDestroyed(SurfaceHolder holder) {
// Surface will be destroyed when we return, so stop the preview.
// Because the CameraDevice object is not a shared resource, it's very
// important to release it when the activity is paused.
mCamera.stopPreview();
mCamera.release();
mCamera = null;
}
public void surfaceChanged(SurfaceHolder holder, int format, int w, int h)
{
width = w;
height = h;
// Now that the size is known, set up the camera parameters and begin the preview.
Camera.Parameters parameters = mCamera.getParameters();
//parameters.setPreviewSize(w, h);
mCamera.setParameters(parameters);
mCamera.startPreview();
}
}
Related
In version 23 of the android API there was the introduction of the class ImageWriter.
I need to use this class in an app that should run on api 19.
How can I re-implement the class? Is there some equivalent code (I have an Image instance I need to draw to a surface)?
Here you have a code which allows you to take a picture and preview it on a Surface. I'm sure you can adapt the code for your purpose.
Here's the XML code:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<SurfaceView
android:id="#+id/preview"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
/>
<RelativeLayout
android:layout_width="fill_parent"
android:layout_height="100dip"
android:layout_alignParentBottom="true"
android:gravity="center_vertical"
android:background="#A000">
<Button
android:layout_width="100dip"
android:layout_height="wrap_content"
android:text="Cancel"
android:onClick="onCancelClick"
/>
<Button
android:layout_width="100dip"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:text="Snap Photo"
android:onClick="onSnapClick"
/>
</RelativeLayout>
</RelativeLayout>
And here the Java code:
package app.test;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.List;
import android.app.Activity;
import android.hardware.Camera;
import android.os.Bundle;
import android.util.Log;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.view.View;
import android.widget.Toast;
public class PreviewActivity extends Activity implements SurfaceHolder.Callback, Camera.ShutterCallback, Camera.PictureCallback {
Camera mCamera;
SurfaceView mPreview;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
mPreview = (SurfaceView)findViewById(R.id.preview);
mPreview.getHolder().addCallback(this);
mPreview.getHolder().setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
mCamera = Camera.open();
}
#Override
public void onPause() {
super.onPause();
mCamera.stopPreview();
}
#Override
public void onDestroy() {
super.onDestroy();
mCamera.release();
Log.d("CAMERA","Destroy");
}
public void onCancelClick(View v) {
finish();
}
public void onSnapClick(View v) {
mCamera.takePicture(this, null, null, this);
}
#Override
public void onShutter() {
Toast.makeText(this, "Click!", Toast.LENGTH_SHORT).show();
}
#Override
public void onPictureTaken(byte[] data, Camera camera) {
//Here, we chose internal storage
try {
FileOutputStream out = openFileOutput("picture.jpg", Activity.MODE_PRIVATE);
out.write(data);
out.flush();
out.close();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
camera.startPreview();
}
#Override
public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
Camera.Parameters params = mCamera.getParameters();
List<Camera.Size> sizes = params.getSupportedPreviewSizes();
Camera.Size selected = sizes.get(0);
params.setPreviewSize(selected.width,selected.height);
mCamera.setParameters(params);
mCamera.setDisplayOrientation(90);
mCamera.startPreview();
}
#Override
public void surfaceCreated(SurfaceHolder holder) {
try {
mCamera.setPreviewDisplay(mPreview.getHolder());
} catch (Exception e) {
e.printStackTrace();
}
}
#Override
public void surfaceDestroyed(SurfaceHolder holder) {
Log.i("PREVIEW","surfaceDestroyed");
}
}
I have tried all the existing methods out there.. but everytime the application force closes. Here is the code. Please help me debugging it.
MainActivity.java
package com.example.camera1;
import android.os.Bundle;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.hardware.Camera;
import android.hardware.Camera.PictureCallback;
import android.app.Activity;
import android.view.Menu;
import android.view.View;
import android.widget.FrameLayout;
import android.widget.ImageView;
import android.widget.Toast;
public class MainActivity extends Activity {
private Camera cameraObject;
private ShowCamera showCamera;
private ImageView pic;
public static Camera isCameraAvailiable(){
Camera object = null;
try { object = Camera.open();
} catch (Exception e){
} return object;
}
private PictureCallback capturedIt = new PictureCallback() {
#Override
public void onPictureTaken(byte[] data, Camera camera) {
Bitmap bitmap = BitmapFactory.decodeByteArray(data , 0, data .length);
if(bitmap==null){
Toast.makeText(getApplicationContext(), "not taken", Toast.LENGTH_SHORT).show();
}
else{
Toast.makeText(getApplicationContext(), "taken", Toast.LENGTH_SHORT).show();
}
cameraObject.release();
}
};
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
pic = (ImageView)findViewById(R.id.imageView1);
cameraObject = isCameraAvailiable();
showCamera = new ShowCamera(this, cameraObject);
FrameLayout preview = (FrameLayout) findViewById(R.id.camera_preview);
preview.addView(showCamera);
}
public void snapIt(View view){
cameraObject.takePicture(null, null, capturedIt);
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
}
ShowCamera.java
package com.example.camera1;
import java.io.IOException;
import android.content.Context;
import android.hardware.Camera;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
public class ShowCamera extends SurfaceView implements SurfaceHolder.Callback {
private SurfaceHolder holdMe;
private Camera theCamera;
public ShowCamera(Context context,Camera camera) {
super(context);
theCamera = camera;
holdMe = getHolder();
holdMe.addCallback(this);
// TODO Auto-generated constructor stub
}
#Override
public void surfaceChanged(SurfaceHolder holder, int format, int width,
int height) {
// TODO Auto-generated method stub
}
#Override
public void surfaceCreated(SurfaceHolder holder) {
// TODO Auto-generated method stub
try {
theCamera.setPreviewDisplay(holder);
theCamera.startPreview();
} catch (IOException e)
{
}
}
#Override
public void surfaceDestroyed(SurfaceHolder holder) {
// TODO Auto-generated method stub
}
}
activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<FrameLayout
android:id="#+id/camera_preview"
android:layout_width="fill_parent"
android:layout_height="199dp" >
</FrameLayout>
<Button
android:id="#+id/button_capture"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:onClick = "snapIt"
android:text="#string/Capture"/>
<ImageView
android:id="#+id/imageView1"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:scaleType="fitXY"
android:src="#drawable/ic_launcher"/>
</LinearLayout>
I am making this for android gingerbread and above versions. where my target sdk is Android Kitkat.
While testing the app on gingerbread it opens the application but simply shows a white screen that is it doesnt load the layout and force closes.. please help..!!
To open the camera,use the following code appropriately:
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.GINGERBREAD) {
Camera.CameraInfo info=new Camera.CameraInfo();
for (int i=0; i < Camera.getNumberOfCameras(); i++) {
Camera.getCameraInfo(i, info);
if (info.facing == Camera.CameraInfo.CAMERA_FACING_FRONT) {
camera=Camera.open(i);
}
}
}
if (camera == null) {
camera=Camera.open();
}
Add the SurfaceView to a FrameLayout in order to display it.
Instead of returning the Camera,you could instead use the global Camera instance variable.The camera is released in onPause like this:
mCamera.release();
mCamera=null;
//remove SurfaceView from the FrameLayout you added it to
You can retain the Camera.Parameters object and use it to set the parameters to the value by placing a check in your surfaceChanged.
You could also consider starting your Camera in a seperate Thread in onCreate as it has been done here:
//This code is from AOSP ICS:
Thread mCameraOpenThread = new Thread(new Runnable() {
public void run() {
try {
mCameraDevice = Util.openCamera(Camera.this, mCameraId);
} catch (CameraHardwareException e) {
mOpenCameraFail = true;
} catch (CameraDisabledException e) {
mCameraDisabled = true;
}
}
});
This is the onCreate method:
super.onCreate(icicle);
mCameraOpenThread.start();
SurfaceView preview = (SurfaceView) findViewById(R.id.camera_preview);
SurfaceHolder holder = preview.getHolder();
holder.addCallback(this);
holder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
// Make sure camera device is opened.
try {
mCameraOpenThread.join();
mCameraOpenThread = null;
}
catch(InterruptedException e)
{
//ignore
}
The link to the code is here http://android.googlesource.com/platform/packages/apps/Camera/+/ics-factoryrom-2-release/src/com/android/camera/Camera.java
I'm new to android and I'm trying to make an app that accesses the camera with zoom and an overlay. To implement zoom I used this:
add Zoom controls of Camera in Camera
I've tried to initialize "params" using this:
Zoom In & Out Custom Camera - Null Pointer Exception
After initialising params in the constructor I still get the error "params cannot be resolved to a variable"
Have I missed something?
Any help would be greatly appreciated.
MainActivity.java
package com.reidbailey.droidscope;
import java.io.IOException;
import android.app.Activity;
import android.content.pm.ActivityInfo;
import android.graphics.PixelFormat;
import android.hardware.Camera;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup.LayoutParams;
import android.widget.ZoomControls;
public class MainActivity extends Activity implements SurfaceHolder.Callback{
Camera camera;
int currentZoomLevel = 0, maxZoomLevel = 0;
SurfaceView surfaceView;
SurfaceHolder surfaceHolder;
boolean cameraview = false;
LayoutInflater inflater = null;
/** Called when the activity is first created. */
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
getWindow().setFormat(PixelFormat.UNKNOWN);
surfaceView = (SurfaceView)findViewById(R.id.cameraview);
surfaceHolder = surfaceView.getHolder();
surfaceHolder.addCallback(this);
surfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
inflater = LayoutInflater.from(getBaseContext());
View view = inflater.inflate(R.layout.overlay, null);
LayoutParams layoutParamsControl= new LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT);
this.addContentView(view, layoutParamsControl);
}
#Override
public void surfaceChanged(SurfaceHolder holder, int format, int width,
int height) {
// TODO Auto-generated method stub
if(cameraview){
camera.stopPreview();
cameraview = false;
}
if (camera != null){
try {
camera.setPreviewDisplay(surfaceHolder);
camera.startPreview();
cameraview = true;
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
ZoomControls zoomControls = (ZoomControls) findViewById(R.id.CAMERA_ZOOM_CONTROLS);
params = camera.getParameters();
if(params.isZoomSupported()){
maxZoomLevel = params.getMaxZoom();
zoomControls.setIsZoomInEnabled(true);
zoomControls.setIsZoomOutEnabled(true);
zoomControls.setOnZoomInClickListener(new OnClickListener(){
public void onClick(View v){
if(currentZoomLevel < maxZoomLevel){
currentZoomLevel++;
camera.startSmoothZoom(currentZoomLevel);
}
}
});
zoomControls.setOnZoomOutClickListener(new OnClickListener(){
public void onClick(View v){
if(currentZoomLevel > 0){
currentZoomLevel--;
camera.startSmoothZoom(currentZoomLevel);
}
}
});
}
else
zoomControls.setVisibility(View.GONE);
}
#Override
public void surfaceCreated(SurfaceHolder holder) {
// TODO Auto-generated method stub
camera = Camera.open();
}
#Override
public void surfaceDestroyed(SurfaceHolder holder) {
// TODO Auto-generated method stub
camera.stopPreview();
camera.release();
camera = null;
cameraview = false;
}
}
activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >
<SurfaceView
android:id="#+id/cameraview"
android:layout_width="fill_parent"
android:layout_height="wrap_content" />
<ZoomControls
android:id="#+id/CAMERA_ZOOM_CONTROLS"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
</LinearLayout>
It's because params is nowhere defined in your code, hence the compiler is complaining. You can declare your variable in place where you're using it, so just add Camera.Parameters in front of your variable name:
Camera.Parameters params = camera.getParameters();
or - if you want to have it accessible in the whole MainActivity, place it below Camera declaration in MainActivity:
Camera camera;
//add params
Camera.Parameters params;
While accepted answer is correct.
As, me, if you too, where here for "cannot resolve Camera.Parameters"
You need to import proper library.
import android.hardware.Camera;
in copy paste i had imported incorrectly
import android.graphics.Camera;
I've developed a very simple app on android to get the webcam screen on a surfaceView and now I want to capture the surfaceView as an image onto SDCard but I only end up with a black screen after saving the picture below is my full app for get webcam screen on surface and also capture the image out of surfaceView:
imported packages
import android.app.Activity;
import android.content.pm.ActivityInfo;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.PixelFormat;
import android.hardware.Camera;
import android.os.Bundle;
import android.os.Environment;
import android.util.Log;
import android.view.*;
import android.widget.Button;
import android.widget.Toast;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
methods for getting webcam screen on a surfaceview
Camera camera;
SurfaceView surfaceView;
SurfaceHolder surfaceHolder;
boolean previewing = false;
private String mScreenshotPath = Environment.getExternalStorageDirectory() + "/myimages";
//private ArrayList<Element> mElements = new ArrayList<Element>();
private Button takePicture;
/** Called when the activity is first created. */
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
getWindow().setFormat(PixelFormat.UNKNOWN);
surfaceView = (SurfaceView)findViewById(R.id.camerapreview);
surfaceHolder = surfaceView.getHolder();
surfaceHolder.addCallback(this);
surfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
surfaceView.setDrawingCacheEnabled(true);
LayoutInflater controlInflater = LayoutInflater.from(getBaseContext());
View viewControl = controlInflater.inflate(R.layout.control, null);
ViewGroup.LayoutParams layoutParamsControl = new ViewGroup.LayoutParams(ViewGroup.LayoutParams.FILL_PARENT
,ViewGroup.LayoutParams.FILL_PARENT);
this.addContentView(viewControl,layoutParamsControl);
takePicture = (Button) findViewById(R.id.takepicture);
takePicture.setOnClickListener(this);
}
#Override
public void surfaceChanged(SurfaceHolder holder, int format, int width,
int height) {
// TODO Auto-generated method stub
if(previewing){
camera.stopPreview();
previewing = false;
}
if (camera != null){
try {
camera.setPreviewDisplay(surfaceHolder);
camera.startPreview();
previewing = true;
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
#Override
public void surfaceCreated(SurfaceHolder holder) {
// TODO Auto-generated method stub
camera = Camera.open();
}
#Override
public void surfaceDestroyed(SurfaceHolder holder) {
// TODO Auto-generated method stub
camera.stopPreview();
camera.release();
camera = null;
previewing = false;
}
on the same class my approach for capturing a surfaceView as image
#Override
public void onClick(View view) {
//To change body of implemented methods use File | Settings | File Templates.
Toast.makeText(getApplicationContext() , "pucture saved" , Toast.LENGTH_SHORT).show();
saveScreenshot();
//takePicture.setVisibility(View.GONE);
}
private boolean ensureSDCardAccess() {
File file = new File(mScreenshotPath);
if (file.exists()) {
return true;
} else if (file.mkdirs()) {
return true;
}
return false;
}
public void saveScreenshot() {
if (ensureSDCardAccess()) {
//Bitmap bitmap = Bitmap.createBitmap(surfaceView.getWidth(), surfaceView.getHeight(), Bitmap.Config.ARGB_8888);
surfaceHolder.getSurface().freeze();
Bitmap bitmap = surfaceView.getDrawingCache();
Canvas canvas = new Canvas(bitmap);
//surfaceView.draw(canvas);
File file = new File(mScreenshotPath + "/" + System.currentTimeMillis() + ".jpg");
FileOutputStream fos;
try {
fos = new FileOutputStream(file);
bitmap.compress(Bitmap.CompressFormat.JPEG, 100, fos);
fos.close();
} catch (FileNotFoundException e) {
Log.e("Panel", "FileNotFoundException", e);
} catch (IOException e) {
Log.e("Panel", "IOEception", e);
}
}
}
layouts :
//main.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
<SurfaceView
android:id="#+id/camerapreview"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
/>
</LinearLayout>
//control.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical"
android:layout_gravity="bottom"
>
<Button android:id="#+id/takepicture"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Take picture"
android:layout_gravity="right"
android:layout_margin="10dp"
/>
</LinearLayout>
As you can see I'm able to capture surfaceView in a bitmap object but my problem is, there isn't any clue of webcam screen on surfaceView during saving it in a bitmap object.
How can I have a persistence surfaceView so I'm not gonna miss the webcam screen?
I had a similar thing where I needed to save my image with an overlay. I achieved this by first saving the captured image, then putting it back into my view, and then saving that as the bitmap. It worked well enough for what i needed.
I'm learning how to program the video camera in android and wrote a very basic program (XML with SurfaceView and two buttons, one to start, one to stop video recording). Video Preview works fine, but after clicking the start_video button I'm getting an IllegalStateException in line 71 mediaRecorder.setVideoFrameRate(videoFramesPerSecond);:
IllegalStateException.<init>() line: 33
MediaRecorder.setVideoFrameRate(int) line: not available [native method]
CamtestActivity$2.onClick(View) line: 71
. I can't understand why this line is throwing this exception while the former line for example, does not.
Any hints? Thanks.
package com.grapp.camtest;
import java.io.IOException;
import android.app.Activity;
import android.content.pm.ActivityInfo;
import android.hardware.Camera;
import android.media.MediaRecorder;
import android.os.Bundle;
import android.util.Log;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.Window;
import android.view.WindowManager;
import android.widget.Button;
import android.widget.Toast;
public class CamtestActivity extends Activity implements SurfaceHolder.Callback{
private static final String TAG = "Camera-Tutorial";
private SurfaceView surfaceView;
private SurfaceHolder surfaceHolder;
private Camera camera;
private boolean previewRunning;
private MediaRecorder mediaRecorder;
private final int maxDurationInMs = 20000;
private final int videoFramesPerSecond = 20;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,WindowManager.LayoutParams.FLAG_FULLSCREEN);
setContentView(R.layout.main);
setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
surfaceView = (SurfaceView) findViewById(R.id.surface_camera);
surfaceHolder = surfaceView.getHolder();
surfaceHolder.addCallback(this);
surfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
Button start_video = (Button) findViewById(R.id.start_video);
Button stop_video = (Button) findViewById(R.id.stop_video);
stop_video.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
mediaRecorder.stop();
camera.lock();
}
});
start_video.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
try {
camera.unlock();
mediaRecorder = new MediaRecorder();
mediaRecorder.setCamera(camera);
mediaRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);
mediaRecorder.setOutputFormat(MediaRecorder.OutputFormat.DEFAULT);
mediaRecorder.setMaxDuration(maxDurationInMs);
mediaRecorder.setVideoFrameRate(videoFramesPerSecond);
mediaRecorder.setVideoSize(surfaceView.getWidth(), surfaceView.getHeight());
mediaRecorder.setVideoEncoder(MediaRecorder.VideoEncoder.DEFAULT);
mediaRecorder.setPreviewDisplay(surfaceHolder.getSurface());
mediaRecorder.setOutputFile("/sdcard/video.mp4");
mediaRecorder.prepare();
mediaRecorder.start();
} catch (IllegalStateException e) {
Log.e(TAG,e.getMessage());
e.printStackTrace();
} catch (IOException e) {
Log.e(TAG,e.getMessage());
e.printStackTrace();
}
}
});
}
#Override
public void surfaceCreated(SurfaceHolder holder) {
camera = Camera.open();
if (camera != null){
Camera.Parameters params = camera.getParameters();
camera.setParameters(params);
}
else {
Toast.makeText(getApplicationContext(), "Camera not available!", Toast.LENGTH_LONG).show();
finish();
}
}
#Override
public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
if (previewRunning){
camera.stopPreview();
}
Camera.Parameters p = camera.getParameters();
p.setPreviewSize(width, height);
camera.setParameters(p);
try {
camera.setPreviewDisplay(holder);
camera.startPreview();
previewRunning = true;
}
catch (IOException e) {
Log.e(TAG,e.getMessage());
e.printStackTrace();
}
}
#Override
public void surfaceDestroyed(SurfaceHolder holder) {
camera.stopPreview();
previewRunning = false;
camera.release();
}
}
From the documentation for setVideoFrameRate():
Sets the frame rate of the video to be captured.
Must be called after setVideoSource().
Call this after setOutFormat() but before prepare().
It seems like you have not yet called setVideoSource() before you try to setVideoFrameRate(). Try setting the video source and see if that solves your problem.