java OutOfMemoryError：位图大小超出VM预算

Question

I have ImageView & one button on my ImageActivity. when the button is clicked the available images are listed, when one of them is clicked, it is loaded into the ImageView.

imageView xml:

   <ImageView
        android:id="@+id/imageView"
        android:layout_width="300dip"
        android:layout_height="300dip"
        android:src="@android:drawable/alert_light_frame" 
   />

Please see the code:

public class ImageActivity extends Activity {

    private static final int SELECT_PICTURE = 1; 
    private String selectedImagePath;
    private ImageView imageView;

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.comments_detail);

    imageView = (ImageView) findViewById(R.id.imageView);

      ((Button) findViewById(R.id.BtnBrowse))
       .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);
                imageView.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); 
    }


}

Issue: The issue is that when i click the button the available images are displayed, i selects one of them & it is loaded in the ImageView, when i repeat these steps few time the application throws throws the exception: java.lang.OutOfMemoryError: bitmap size exceeds VM budget

I goggled it & found that this issue is because of memory leaks but i am unable to find whats wrong with my code. Can anyone spend some of his valuable time to help me?

Thanks.

Answer 1

If you do a series of setImageURIs , you are loading a series of bitmaps into the view. If you are getting the java.lang.OutOfMemoryError: bitmap size exceeds VM budget exception , that implies that the imageView does not recycle the previous bitmap when you load a new one. So you

• either need to encourage the imageView to recycle the previous bitmap - possibly with setImageView("")
• or get the bitmap from the URI and use setImageBitmap(android.graphics.Bitmap) instead; then you can do setImageBitmap(null) and bitmap.recycle() .

Answer 2

Well calling the system.gc() worked!! Before the image is assigned to the imageView, i called the System.gc(), to take care of memory & it works.

Look at the modified code:

public void onActivityResult(int requestCode, int resultCode, Intent data) 
{ 
    if (resultCode == RESULT_OK) 
    {
         if (requestCode == SELECT_PICTURE) 
         { 
            // calling GC to take care of memory, if you remove this one line of code
            // application will throw the error "VM out of memory error"
            System.gc();
            Uri selectedImageUri = data.getData(); 
            selectedImagePath = getPath(selectedImageUri); 
            imageView.setImageURI(selectedImageUri);  
       }  
   } 
} 

Thanks @Torid .

Can someone comment on it? is this correct way to call the GC in this situation?