Android：创建图片库应用程序时出现 java.lang.OutOfMemoryError

Question

尝试创建一个从手机内存中读取图像的图库应用程序。但是在显示三张图片后，应用程序崩溃了。

代码如下

public class MainActivity extends ActionBarActivity {
private String[] FilePathStrings;
private String[] FileNameStrings;
private File[] listFile;
Gallery gallerry;
GridViewAdapter adapter;
File file;

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

       // Check for SD Card
       if (!Environment.getExternalStorageState().equals(
                    Environment.MEDIA_MOUNTED)) {
              Toast.makeText(this, "Error! No SDCARD Found!", Toast.LENGTH_LONG)
                           .show();
       } else {
              file = new File(Environment.getExternalStorageDirectory()
                           + File.separator + "/sdcard/download/media");
              file.mkdirs();
       }

       if (file.isDirectory()) {
              listFile = file.listFiles();
              FilePathStrings = new String[listFile.length];
              FileNameStrings = new String[listFile.length];
              String len=Integer.toString(listFile.length);
              Toast.makeText(this, len, Toast.LENGTH_LONG)
              .show();

              for (int i = 0; i <listFile.length; i++) {
                    FilePathStrings[i] = listFile[i].getAbsolutePath();
                    FileNameStrings[i] = listFile[i].getName();

              }
       }

       gallerry = (Gallery) findViewById(R.id.gridview);
       adapter = new GridViewAdapter(this, FilePathStrings, FileNameStrings);
       gallerry.setSpacing(2);
       gallerry.setAdapter(adapter);

       gallerry.setOnItemClickListener(new OnItemClickListener() {

              @Override
              public void onItemClick(AdapterView<?> parent, View view,
                           int position, long id) {

                    zoomImage(position);
              }

       });
}

private void zoomImage(int position) {
       //final Dialog dialog = new Dialog(MainActivity.this);
       //dialog.requestWindowFeature(Window.FEATURE_NO_TITLE);
       //dialog.getWindow().setBackgroundDrawableResource(
         //           android.R.color.transparent);
       //dialog.setContentView(R.layout.image_zoomdialog);
       ImageView imageview = (ImageView) findViewById(R.id.imageView1);
       Bitmap bmp = BitmapFactory.decodeFile(FilePathStrings[position]);
       imageview.setImageBitmap(bmp);
       //dialog.show();

}


}

class GridViewAdapter extends BaseAdapter {

   // Declare variables
   private Activity activity;
   private String[] filepath;
   private String[] filename;

   private static LayoutInflater inflater = null;

   public GridViewAdapter(Activity a, String[] fpath, String[] fname) {
          activity = a;
          filepath = fpath;
          filename = fname;
          inflater = (LayoutInflater) activity
                       .getSystemService(Context.LAYOUT_INFLATER_SERVICE);

   }

   public int getCount() {
          return filepath.length;

   }

   public Object getItem(int position) {
          return position;
   }

   public long getItemId(int position) {
          return position;
   }

   public View getView(int position, View convertView, ViewGroup parent) {

            // TODO Auto-generated method stub
    ImageView i = new ImageView(activity);

    Bitmap bmp = BitmapFactory.decodeFile(filepath[position]);
    //i.setImageResource(mImageIds[position]);
    i.setLayoutParams(new Gallery.LayoutParams(200, 200));
    i.setScaleType(ImageView.ScaleType.FIT_XY);
    i.setImageBitmap(bmp);
          return i;
   }
}

日志如下

05-03 17:22:04.285：E/AndroidRuntime(2243)：致命异常：主要 05-03 17:22:04.285: E/AndroidRuntime(2243): 进程: com.example.gallery, PID: 2243 05-03 17:22:04.285: E/AndroidRuntime(2243): java.lang.OutOfMemoryError 05-03 17:22:04.285: E/AndroidRuntime(2243): 在 android.graphics.BitmapFactory.nativeDecodeStream(Native Method) 05-03 17:22:04.285: E/AndroidRuntime(2243): 在 android.graphics.BitmapFactory.decodeStreamInternal(BitmapFactory.java:613) 05-03 17:22:04.285: E/AndroidRuntime(2243): 在 android.graphics.BitmapFactory.decodeStream(BitmapFactory.java:589) 05-03 17:22:04.285: E/AndroidRuntime(2243): 在 android.graphics.BitmapFactory.decodeFile(BitmapFactory.java:369) 05-03 17:22:04.285: E/AndroidRuntime(2243): 在 android.graphics.BitmapFactory.decodeFile(BitmapFactory.java:395) 05-03 17:22:04.285: E/AndroidRuntime(2243): 在 com.example.gallery.GridViewAdapter.getView(MainActivity.java:155) 05-03 17:22:04.285: E/AndroidRuntime(2243): 在 android.widget.AbsSpinner.onMeasure(AbsSpinner.java:193) 05-03 17:22:04.285: E/AndroidRuntime(2243): 在 android.view.View.layout(View.java:14844) 05-03 17:22:04.285: E/AndroidRuntime(2243): 在 android.view.ViewGroup.layout(ViewGroup.java:4641) 05-03 17:22:04.285: E/AndroidRuntime(2243): 在 android.widget.RelativeLayout.onLayout(RelativeLayout.java:1055) 05-03 17:22:04.285: E/AndroidRuntime(2243): 在 android.view.View.layout(View.java:14857) 05-03 17:22:04.285: E/AndroidRuntime(2243): 在 android.view.ViewGroup.layout(ViewGroup.java:4641) 05-03 17:22:04.285: E/AndroidRuntime(2243): 在 android.widget.FrameLayout.layoutChildren(FrameLayout.java:453) 05-03 17:22:04.285: E/AndroidRuntime(2243): 在 android.widget.FrameLayout.onLayout(FrameLayout.java:388) 05-03 17:22:04.285: E/AndroidRuntime(2243): 在 android.view.View.layout(View.java:14857) 05-03 17:22:04.285: E/AndroidRuntime(2243): 在 android.view.ViewGroup.layout(ViewGroup.java:4641) 05-03 17:22:04.285: E/AndroidRuntime(2243): 在 com.android.internal.widget.ActionBarOverlayLayout.onLayout(ActionBarOverlayLayout.java:374) 05-03 17:22:04.285: E/AndroidRuntime(2243): 在 android.view.View.layout(View.java:14857) 05-03 17:22:04.285: E/AndroidRuntime(2243): 在 android.view.ViewGroup.layout(ViewGroup.java:4641) 05-03 17:22:04.285: E/AndroidRuntime(2243): 在 android.widget.FrameLayout.layoutChildren(FrameLayout.java:453) 05-03 17:22:04.285: E/AndroidRuntime(2243): 在 android.widget.FrameLayout.onLayout(FrameLayout.java:388) 05-03 17:22:04.285: E/AndroidRuntime(2243): 在 android.view.View.layout(View.java:14857) 05-03 17:22:04.285: E/AndroidRuntime(2243): 在 android.view.ViewGroup.layout(ViewGroup.java:4641) 05-03 17:22:04.285: E/AndroidRuntime(2243): 在 android.view.ViewRootImpl.performLayout(ViewRootImpl.java:2018) 05-03 17:22:04.285: E/AndroidRuntime(2243): 在 android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1775) 05-03 17:22:04.285: E/AndroidRuntime(2243): 在 android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1024) 05-03 17:22:04.285: E/AndroidRuntime(2243): 在 android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:5796) 05-03 17:22:04.285: E/AndroidRuntime(2243): 在 android.view.Choreographer$CallbackRecord.run(Choreographer.java:761) 05-03 17:22:04.285: E/AndroidRuntime(2243): 在 android.view.Choreographer.doCallbacks(Choreographer.java:574) 05-03 17:22:04.285: E/AndroidRuntime(2243): 在 android.view.Choreographer.doFrame(Choreographer.java:544) 05-03 17:22:04.285: E/AndroidRuntime(2243): 在 android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:747) 05-03 17:22:04.285: E/AndroidRuntime(2243): 在 android.os.Handler.handleCallback(Handler.java:733) 05-03 17:22:04.285: E/AndroidRuntime(2243): 在 android.os.Handler.dispatchMessage(Handler.java:95) 05-03 17:22:04.285: E/AndroidRuntime(2243): 在 android.os.Looper.loop(Looper.java:136) 05-03 17:22:04.285: E/AndroidRuntime(2243): 在 android.app.ActivityThread.main(ActivityThread.java:5102) 05-03 17:22:04.285: E/AndroidRuntime(2243): 在 java.lang.reflect.Method.invokeNative(Native Method) 05-03 17:22:04.285: E/AndroidRuntime(2243): 在 java.lang.reflect.Method.invoke(Method.java:515) 05-03 17:22:04.285: E/AndroidRuntime(2243): 在 com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:785) 05-03 17:22:04.285: E/AndroidRuntime(2243): 在 com.android.internal.os.ZygoteInit.main(ZygoteInit.java:601) 05-03 17:22:04.285: E/AndroidRuntime(2243): at dalvik.system.NativeStart.main(Native Method)

希望这会有所帮助！

Answer 1

可能是您正在加载的图像太大导致堆大小快速增长并导致应用程序崩溃尝试缩小图像大小然后加载它。 您可以使用以下代码：

public static Bitmap getResizedBitmap(Bitmap image, int newHeight, int newWidth) {
int width = image.getWidth();
int height = image.getHeight();
float scaleWidth = ((float) newWidth) / width;
float scaleHeight = ((float) newHeight) / height;
// create a matrix for the manipulation
Matrix matrix = new Matrix();
// resize the bit map
matrix.postScale(scaleWidth, scaleHeight);
// recreate the new Bitmap
Bitmap resizedBitmap = Bitmap.createBitmap(image, 0, 0, width, height,
        matrix, false);
return resizedBitmap;
}