android - 星系 s3 中的 OutOfMemoryError

Question

Intent localIntent = new Intent(
                android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
        File dir = Environment
                .getExternalStoragePublicDirectory(Environment.DIRECTORY_DCIM);
        random = new Random();
        seqNo = random.nextInt(1000000);
        photoName = String.valueOf(seqNo);
        output = new File(dir, photoName + ".jpeg");
        imgPath = Uri.fromFile(output);
        localIntent.putExtra(MediaStore.EXTRA_OUTPUT, imgPath);
        path = output.getAbsolutePath();
        startActivityForResult(localIntent, PICK_Camera_IMAGE);


protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
            if (requestCode== PICK_Camera_IMAGE && resultCode == RESULT_OK)  {


                        try {


                            File f = new File(path);

                            Matrix mat = new Matrix();
                            mat.postRotate(90);
//
                            Bitmap bmp = BitmapFactory.decodeStream(new FileInputStream(f), null, null);
                            Bitmap bmpPic = Bitmap.createBitmap(bmp, 0, 0, bmp.getWidth(), bmp.getHeight(), mat, true);  

注意:我使用此代码使用相机拍照。它在除 samsung galaxy s3 之外的所有设备中运行。当我在 s3 上运行时，它会出现类似 OutOfMemoryError 的错误。

日志:

04-27 11:26:49.775: E/AndroidRuntime(6356): java.lang.OutOfMemoryError
04-27 11:26:49.775: E/AndroidRuntime(6356):     at android.graphics.Bitmap.nativeCreate(Native Method)
04-27 11:26:49.775: E/AndroidRuntime(6356):     at android.graphics.Bitmap.createBitmap(Bitmap.java:640)
04-27 11:26:49.775: E/AndroidRuntime(6356):     at android.graphics.Bitmap.createBitmap(Bitmap.java:586)
04-27 11:26:49.775: E/AndroidRuntime(6356):     at com.example.camera.CameraAct$10$1.run(CameraAct.java:378)
04-27 11:26:49.775: E/AndroidRuntime(6356):     at android.os.Handler.handleCallback(Handler.java:615)
04-27 11:26:49.775: E/AndroidRuntime(6356):     at android.os.Handler.dispatchMessage(Handler.java:92)
04-27 11:26:49.775: E/AndroidRuntime(6356):     at android.os.Looper.loop(Looper.java:137)
04-27 11:26:49.775: E/AndroidRuntime(6356):     at android.app.ActivityThread.main(ActivityThread.java:4898)
04-27 11:26:49.775: E/AndroidRuntime(6356):     at java.lang.reflect.Method.invokeNative(Native Method)
04-27 11:26:49.775: E/AndroidRuntime(6356):     at java.lang.reflect.Method.invoke(Method.java:511)
04-27 11:26:49.775: E/AndroidRuntime(6356):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1006)

Answer 1

您需要在使用前减少位图的样本大小。这可用于执行此操作。

private Bitmap decodeFile(File file)
{
    try 
    {
        //********************* decode image size ********************
        BitmapFactory.Options options = new BitmapFactory.Options();
        options.inJustDecodeBounds = true;
        BitmapFactory.decodeStream(new FileInputStream(file), null, options);

        // ********************** Find the correct scale value. It should be the power of 2. ********************
        options.inSampleSize = BitmapConverter.calculateInSampleSize(options, 145, 105);
        options.inJustDecodeBounds = false;

        return BitmapFactory.decodeStream(new FileInputStream(file), null, options);
    } 
    catch(FileNotFoundException eFileNotFoundException) 
    {

        return null;
    }
}

然后你可以在需要时调用 Bitmap.recycle()，尽管我觉得没有必要。