外部分配对于这个过程来说太大了

时间:2011-11-23 23:52:33

标签: java android imageview gallery

昨晚我发布了一个关于这个问题的问题,但我不认为我解释得很好,以获得适当的帮助。所以基本上,我有一个应用程序,您可以按下一个按钮,让您从图库中选择一个图像,并在我在应用程序中显示的ImageView中显示它。一切都很好。但是,当我再次按下按钮并选择不同的图片时,应用程序强制关闭。

更新现在,如果我从图库中的下载照片文件夹中拍摄照片,它可以正常工作,可以随时切换照片。但当我回到我的相机照片文件夹来更改图片时,它会强行关闭。

更新2 它也适用于我的图库应用中的任何其他文件夹。只有一个有这个问题(强制关闭)的是“相机”文件夹

更新3 19660800字节的外部分配对于此过程来说太大了。造成了这个问题。有什么方法可以减少所选照片的​​尺寸吗?

        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.myimageview);

          ((Button) findViewById(R.id.taptoadd))
                  .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);


      }

这是日志

              11-23 16:33:15.871: D/dalvikvm(9171): GC_EXTERNAL_ALLOC freed 51K, 49% free 2793K/5447K, external 20868K/22916K, paused 50ms
    11-23 16:33:15.878: E/dalvikvm-heap(9171): 19660800-byte external allocation too large for this process.
    11-23 16:33:15.886: E/GraphicsJNI(9171): VM won't let us allocate 19660800 bytes
    11-23 16:33:15.906: D/dalvikvm(9171): GC_FOR_MALLOC freed <1K, 49% free 2792K/5447K, external 1668K/20868K, paused 18ms
    11-23 16:33:15.906: D/skia(9171): --- decoder->decode returned false
    11-23 16:33:15.906: D/AndroidRuntime(9171): Shutting down VM
    11-23 16:33:15.910: W/dalvikvm(9171): threadid=1: thread exiting with uncaught exception (group=0x40015560)
    11-23 16:33:15.937: E/AndroidRuntime(9171): FATAL EXCEPTION: main
    11-23 16:33:15.937: E/AndroidRuntime(9171): java.lang.OutOfMemoryError: bitmap size exceeds VM budget
    11-23 16:33:15.937: E/AndroidRuntime(9171):     at android.graphics.BitmapFactory.nativeDecodeStream(Native Method)
    11-23 16:33:15.937: E/AndroidRuntime(9171):     at android.graphics.BitmapFactory.decodeStream(BitmapFactory.java:470)
    11-23 16:33:15.937: E/AndroidRuntime(9171):     at android.graphics.BitmapFactory.decodeResourceStream(BitmapFactory.java:336)
    11-23 16:33:15.937: E/AndroidRuntime(9171):     at android.graphics.drawable.Drawable.createFromResourceStream(Drawable.java:697)
    11-23 16:33:15.937: E/AndroidRuntime(9171):     at android.graphics.drawable.Drawable.createFromStream(Drawable.java:657)
    11-23 16:33:15.937: E/AndroidRuntime(9171):     at android.widget.ImageView.resolveUri(ImageView.java:521)
    11-23 16:33:15.937: E/AndroidRuntime(9171):     at android.widget.ImageView.setImageURI(ImageView.java:305)
    11-23 16:33:15.937: E/AndroidRuntime(9171):     at snapshot.app.LinearLayoutsActivity.onActivityResult(LinearLayoutsActivity.java:48)
    11-23 16:33:15.937: E/AndroidRuntime(9171):     at android.app.Activity.dispatchActivityResult(Activity.java:3908)
    11-23 16:33:15.937: E/AndroidRuntime(9171):     at android.app.ActivityThread.deliverResults(ActivityThread.java:2528)
    11-23 16:33:15.937: E/AndroidRuntime(9171):     at android.app.ActivityThread.handleSendResult(ActivityThread.java:2574)
    11-23 16:33:15.937: E/AndroidRuntime(9171):     at android.app.ActivityThread.access$2000(ActivityThread.java:117)
    11-23 16:33:15.937: E/AndroidRuntime(9171):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:961)
    11-23 16:33:15.937: E/AndroidRuntime(9171):     at android.os.Handler.dispatchMessage(Handler.java:99)
    11-23 16:33:15.937: E/AndroidRuntime(9171):     at android.os.Looper.loop(Looper.java:130)
    11-23 16:33:15.937: E/AndroidRuntime(9171):     at android.app.ActivityThread.main(ActivityThread.java:3683)
    11-23 16:33:15.937: E/AndroidRuntime(9171):     at java.lang.reflect.Method.invokeNative(Native Method)
    11-23 16:33:15.937: E/AndroidRuntime(9171):     at java.lang.reflect.Method.invoke(Method.java:507)
    11-23 16:33:15.937: E/AndroidRuntime(9171):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
    11-23 16:33:15.937: E/AndroidRuntime(9171):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
    11-23 16:33:15.937: E/AndroidRuntime(9171):     at dalvik.system.NativeStart.main(Native Method)

1 个答案:

答案 0 :(得分:5)

您获得的错误意味着您加载的位图太大。你需要对它进行下采样。有关如何处理此问题的一些很好的示例,请参阅此问题:Strange out of memory issue while loading an image to a Bitmap object

更新:您需要先自己加载位图,然后将该位图设置为ImageView上的图像,而不是告诉ImageView将哪个URI作为位图加载。这非常简单。

要从您加载位图必须首先将URI转换为字符串(我认为您可以使用URI.getPath()虽然我不确定)包含图像的路径然后您可以加载位图:

Bitmap b = BitmapFactory.decodeFile(pathToImage);

这将解码整个位图,而不是要将位图下采样到所需的分辨率。让我们说你的imageview将是125x125像素,你的图像是1000x1000像素。 125/1000 = 8所以我们只需要解码每第8个像素。为此,我们执行以下操作:

int inSample = 8;

opts = new BitmapFactory.Options();
opts.inSampleSize = inSample;

Bitmap b = BitmapFactory.decodeFile(pathToImage, opts); // this bitmap will be 1/8 the size of the original

它很直接,应该解决你的记忆问题。请参阅我对此问题的回答的第二部分:Android GalleryView Recycling以获得更广泛的解释。