I want to delete/remove or clear image from imageView every time when user again click to set another image to the imageView. i am getting OutOfMemoryError: bitmap size exceeds VM budget(Heap Size=7239KB, Allocated=2769KB, Bitmap Size=8748KB)
here is my code:
ImageView imageView;
private static final int SELECT_PICTURE = 1;
private String selectedImagePath;
Bitmap yourSelectedImage;
#Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
}
#Override
protected void onResume() {
super.onResume();
imageView = (ImageView) findViewById(R.id.imageView);
((ImageView) findViewById(R.id.imageView))
.setOnClickListener(new OnClickListener() {
public void onClick(View arg0) {
goToGallery();
}
});
}
public void onActivityResult(int requestCode, int resultCode, Intent data) {
if (resultCode == RESULT_OK) {
if (requestCode == SELECT_PICTURE) {
Uri selectedImageUri = data.getData();
selectedImagePath = getPath(selectedImageUri);
/*Toast.makeText(getBaseContext(), "" + selectedImagePath, 1000)
.show();
*///editText2.setText(selectedImagePath);
// Convert file path into bitmap image using below line.
yourSelectedImage = BitmapFactory
.decodeFile(selectedImagePath);
// put bitmapimage in your imageview
imageView.setImageBitmap(yourSelectedImage);
}
}
}
public String getPath(Uri uri) {
String[] projection = { MediaStore.Images.Media.DATA };
Cursor cursor = managedQuery(uri, projection, null, null, null);
int column_index = cursor
.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
cursor.moveToFirst();
return cursor.getString(column_index);
}
private void goToGallery()
{
// in onCreate or any event where your want the user to
// select a file
Intent intent = new Intent();
intent.setType("image/*");
intent.setAction(Intent.ACTION_GET_CONTENT);
startActivityForResult(
Intent.createChooser(intent, "Select Picture"),
SELECT_PICTURE);
}
Setting a resource to 0 did not work for me. The following did work though:
imageView.setImageBitmap(null);
use the special resource Id '0'. It is not a valid res id, hence the image is blanked.
image.setImageDrawable(null);
will clear the image in the imageview.
When you set another image to the current ImageView the previous one is no longer used for the ImageView. Hence, no need to do extra work.
viewToUse.setImageResource(android.R.color.transparent);
I think using setImageResource with a color identifier will give you crashing issues on Android 2.2.1, make sure to test it.
edit_countflag.setBackgroundColor(0);
Related
I have just started in developing in Android. So far I am learning stuff. I am stuck with this problem. In my onCreate method, i have a button to select an image in the device and the onActivityResult to get the image and display the image in an ImageView
After researching and looking for answers in the internet, someone advice that I am missing the onSaveInstanceState. so I created it. Here is my code.
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Button buttonLoadImage = (Button)findViewById(R.id.buttonLoadPicture);
targetImage = (ImageView) findViewById(R.id.imgView);
buttonLoadImage.setOnClickListener(new Button.OnClickListener() {
#Override
public void onClick(View arg0) {
Intent intent = new Intent(Intent.ACTION_PICK, android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
startActivityForResult(intent, RESULT_LOAD_IMG);
}
});
}
#Override
public void onSaveInstanceState(Bundle savedInstanceState){
savedInstanceState.putParcelable("BitmapImage", bitmap);
super.onSaveInstanceState(savedInstanceState);
}
#Override
protected void onRestoreInstanceState(Bundle savedInstanceState){
image = savedInstanceState.getParcelable("BitmapImage");
targetImage.setImageBitmap(image);
}
#Override
protected void onActivityResult( int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
try {
if (requestCode == RESULT_LOAD_IMG && resultCode == RESULT_OK){
Uri targetUri = data.getData();
String[] filePathColumn = { MediaStore.Images.Media.DATA };
Cursor cursor = getContentResolver().query(targetUri, filePathColumn, null, null, null);
cursor.moveToFirst();
int columnIndex = cursor.getColumnIndex(filePathColumn[0]);
imgDecodableString = cursor.getString(columnIndex);
cursor.close();
this.bitmap = BitmapFactory.decodeStream(getContentResolver().openInputStream(targetUri));
targetImage.setImageBitmap(bitmap);
}
}
catch (FileNotFoundException e){
e.printStackTrace();
}
}
After building and running the code, selecting image and displaying it in ImageView works fine. When i change the orientation, image selected is still displayed. However when i rotate back again, the image displayed is gone.
Where am i doing wrong. Any advice and help is appreciated.
Are you storing 'bitmap' correctly? Here you are storing it to a local variable:
Bitmap bitmap;
bitmap = BitmapFactory.decodeStream(getContentResolver().openInputStream(targetUri));
targetImage.setImageBitmap(bitmap);
And here you are using a field:
savedInstanceState.putParcelable("BitmapImage", bitmap);
Looks like the field isn't being set so the onSaveInstanceState is storing a null value. Try removing Bitmap bitmap; or change bitmap = BitmapFactory... to this.bitmap = BitmapFactory.
EDIT:
Also try storing bitmap here:
image = savedInstanceState.getParcelable("BitmapImage");
targetImage.setImageBitmap(image);
By changing it to:
image = savedInstanceState.getParcelable("BitmapImage");
this.bitmap = image;
targetImage.setImageBitmap(this.bitmap);
I'm not sure what image is though as you haven't include the delcaration in the post.
Hi How to write text in photos? I searched in google but I couldn't find where to search and find. Please provide me tutorial or guide for this solution. Taking a picture from gallery or from drawable and writing text on photos.
So far, I selected an image from gallery and displayed in imageview. But I couldn't find how to write text on that photo. Please guide me to provide solution.
public class GetImageActivity extends Activity {
private static final int SELECT_PICTURE = 1;
private String selectedImagePath;
private ImageView img;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
img = (ImageView)findViewById(R.id.ImageView01);
((Button) findViewById(R.id.Button01))
.setOnClickListener(new OnClickListener() {
public void onClick(View arg0) {
Intent intent = new Intent();
intent.setType("image/*");
intent.setAction(Intent.ACTION_GET_CONTENT);
startActivityForResult(Intent.createChooser(intent,"Select Picture"), SELECT_PICTURE);
}
});
}
public void onActivityResult(int requestCode, int resultCode, Intent data) {
if (resultCode == RESULT_OK) {
if (requestCode == SELECT_PICTURE) {
Uri selectedImageUri = data.getData();
selectedImagePath = getPath(selectedImageUri);
System.out.println("Image Path : " + selectedImagePath);
img.setImageURI(selectedImageUri);
}
}
}
public String getPath(Uri uri) {
String[] projection = { MediaStore.Images.Media.DATA };
Cursor cursor = managedQuery(uri, projection, null, null, null);
int column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
cursor.moveToFirst();
return cursor.getString(column_index);
}
}
Thanks.
You can obtain Canvas from the Bitmap and draw directly on it.
Suppose you got image path, decoded it into the Bitmap object, then you can do following
Bimtap bitmap = loadBitmap(path);
Canvas c = new Canvas(bitmap);
c.drawText(text, x, y, paint)
Here's more detailed code
Draw text on bitmap
Fetching images one by one to android app then saving count of pictures on textview. Here if same image fetched again in to android app then don't want to increase the count of textview, how to handle this?
public class GetImageActivity extends Activity {
private static final int SELECT_PICTURE = 1;
private String selectedImagePath;
private ImageView img;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
img = (ImageView)findViewById(R.id.ImageView01);
((Button) findViewById(R.id.Button01))
.setOnClickListener(new OnClickListener() {
public void onClick(View arg0) {
Intent intent = new Intent();
intent.setType("image/*");
intent.setAction(Intent.ACTION_GET_CONTENT);
startActivityForResult(Intent.createChooser(intent,"Select Picture"), SELECT_PICTURE);
}
});
}
public void onActivityResult(int requestCode, int resultCode, Intent data) {
if (resultCode == RESULT_OK) {
if (requestCode == SELECT_PICTURE) {
Uri selectedImageUri = data.getData();
selectedImagePath = getPath(selectedImageUri);
System.out.println("Image Path : " + selectedImagePath);
img.setImageURI(selectedImageUri);
}
}
}
public String getPath(Uri uri) {
String[] projection = { MediaStore.Images.Media.DATA };
Cursor cursor = managedQuery(uri, projection, null, null, null);
int column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
cursor.moveToFirst();
return cursor.getString(column_index);
}
}
You must be getting a URI of the image. Maintain a HashSet of the URIs. HashSet will remove the duplicates for you.
In the textview you can just show the size of the HashSet, that will always show the unique number of images.
PS: md5 is also a solution, but TOO TOO slow for your use case. In case you have the same image coming with different URIs (same images placed at different places on the storage), you may have to go for md5 if you want to make that unique.
you can do it by using md5 checksum
if two images are identical then their checksum value will also be identical.
I am using a very simple code to pick image from gallery, it work on my phone.
but testing it on three to four phones(Galaxy S3,Tablet etc..) it does not work.
Environment It Works:
if the image size i took or was in gallery below 500kb then it works
Environment It Does'nt Work:
if the image size i took or was in gallery above 500kb then it works
ImageView myimg;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// Toast.makeText(this, UUID.randomUUID().toString(),
// Toast.LENGTH_LONG).show();
myimg = (ImageView) findViewById(R.id.imageView1);
mybutton = (Button) findViewById(R.id.myButton);
mybutton.setOnClickListener(this);
}
public void onClick(View v) {
if (v == mybutton) {
Intent intent = new Intent(Intent.ACTION_GET_CONTENT);
intent.setType("image/*");
startActivityForResult(intent, 0);
}
}
#Override
protected void onActivityResult(int requestCode, int resultCode,
Intent imageReturnedIntent) {
switch (requestCode) {
case 0:
if (resultCode == RESULT_OK) {
Uri selectedImage = imageReturnedIntent.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 filePath = cursor.getString(columnIndex); // file path of
// selected
// image
cursor.close();
// Convert file path into bitmap image using below line.
Bitmap yourSelectedImage = BitmapFactory.decodeFile(filePath);
// put bitmapimage in your imageview
myimg.setImageBitmap(yourSelectedImage);
}
}
}
Any one put some light on it how to handle this situation?
Any help would be appreciated.
I am trying to use Android's built-in gallery. I am able to get the gallery and the albums, but whenever I want to display the image, the gallery straightaway directs me back to my app. I am unable to view the image despite it has been called.
This is my code:
public class CameraTab extends Activity implements OnClickListener{
private static final int SELECT_PICTURE = 1;
private String selectedImagePath;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.camera_tab);
ImageButton cameraBtn = (ImageButton)findViewById(R.id.camera_btn);
cameraBtn.setOnClickListener(this);
ImageButton galleryBtn = (ImageButton)findViewById(R.id.gallery_btn);
galleryBtn.setOnClickListener(this);
}
public void onClick(View v) {
// TODO Auto-generated method stub
if (v == this.findViewById(R.id.camera_btn)){
/// some codes here
}
if (v == this.findViewById(R.id.gallery_btn)){
Intent intent = new Intent();
intent.setType("image/*");
intent.setAction(Intent.ACTION_GET_CONTENT);
startActivityForResult(Intent.createChooser(intent,
"Select Picture"), SELECT_PICTURE);
}
}
public void onActivityResult(int requestCode, int resultCode, Intent data) {
if (resultCode == RESULT_OK) {
if (requestCode == SELECT_PICTURE) {
Uri selectedImageUri = data.getData();
selectedImagePath = getPath(selectedImageUri);
}
}
}
public String getPath(Uri uri) {
String[] projection = { MediaStore.Images.Media.DATA };
Cursor cursor = managedQuery(uri, projection, null, null, null);
int column_index = cursor
.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
cursor.moveToFirst();
return cursor.getString(column_index);
}
}
Can anyone please help me? Any help would be appreciated!! Thanks!!
The problem is a misunderstanding of Intent.ACTION_GET_CONTENT intent. It's intented to be used to choose a content (in this case image/*) from the archive.
If you want to show an image, just create a new activity with an ImageView in its layout. Pass the image URI using setData.
I think the Action you want to use is Intent.ACTION_VIEW.
try this
final Intent intent = new Intent(Intent.ACTION_VIEW);
final Uri uri = <The URI to your file>;
// Uri either from file eg.
final Uri uri = Uri.fromFile(yourImageFileOnSDCard);
// or from media store like your method getPath() does but with the URI
// from http://developer.android.com/reference/android/provider/MediaStore.Images.Media.html#EXTERNAL_CONTENT_URI
intent.setDataAndType(uri, "image/*");
startActivity(intent);
The string "image/* is the mime type to be used.
Now the gallery is opened with the given picture selected. To return to your app the user has to press the back button, as usual ;)
private Context context;
public void onCreate(Bundle savedInstanceState) {
...
context = this;
}
I used a scaled Bitmap below because on some devices the images in the Gallery might be too large for being displayed on an ImageView (I had this problem before).
#Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (resultCode == RESULT_OK) {
if (requestCode == SELECT_PICTURE) {
Uri selectedImageUri = data.getData();
selectedImagePath = getPath(selectedImageUri);
Bitmap b = new BitmapDrawable(context.getResources(),
selectedImagePath).getBitmap();
int i = (int) (b.getHeight() * (512.0 / b.getWidth()));
bitmap = Bitmap.createScaledBitmap(b, 512, i, true);
// To display the image, you need to set it to an ImageView here
ImageView img = (ImageView) findViewById(R.id.myImageView);
img.setImageBitmap(bitmap);
}
}
}