从相机加载图像时内存不足

Question

我在拍照后使用以下方法从相机中获取位图。在我的 phone 上它工作正常，但我有很多用户在这里遇到 OutOfMemory 错误。我在下面包含了堆栈跟踪。

public static Bitmap getLastTakenImage(Context context) {
    String[] projection = new String[]{
            MediaStore.Images.ImageColumns._ID,
            MediaStore.Images.ImageColumns.DATA,
            MediaStore.Images.ImageColumns.BUCKET_DISPLAY_NAME,
            MediaStore.Images.ImageColumns.DATE_TAKEN,
            MediaStore.Images.ImageColumns.MIME_TYPE
    };
    final Cursor cursor = context.getContentResolver()
            .query(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, projection, null,
                    null, MediaStore.Images.ImageColumns.DATE_TAKEN + " DESC");

    if (cursor.moveToFirst()) {
        String imageLocation = cursor.getString(1);
        File imageFile = new File(imageLocation);
        if (imageFile.exists() && imageFile.length() > 0) {
            Bitmap bm = BitmapFactory.decodeFile(imageLocation);
            return bm;
        }
    }
    return null;
}

堆栈跟踪：

java.lang.OutOfMemoryError
    at android.graphics.BitmapFactory.nativeDecodeStream(Native Method)
    at android.graphics.BitmapFactory.decodeStream(BitmapFactory.java:623)
    at android.graphics.BitmapFactory.decodeFile(BitmapFactory.java:378)
    at android.graphics.BitmapFactory.decodeFile(BitmapFactory.java:417)
    at com.app.SquareCamera.ImageUtility.getLastTakenImage(ImageUtility.java:243)
    at com.app.SquareCamera.CameraFragment.onViewCreated(CameraFragment.java:141)
    at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:973)
    at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1138)
    at android.support.v4.app.BackStackRecord.run(BackStackRecord.java:740)
    at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1501)
    at android.support.v4.app.FragmentActivity.onStart(FragmentActivity.java:551)
    at android.app.Instrumentation.callActivityOnStart(Instrumentation.java:1181)
    at android.app.Activity.performStart(Activity.java:5293)
    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2218)
    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2299)
    at android.app.ActivityThread.access0(ActivityThread.java:150)
    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1280)
    at android.os.Handler.dispatchMessage(Handler.java:99)
    at android.os.Looper.loop(Looper.java:137)
    at android.app.ActivityThread.main(ActivityThread.java:5283)
    at java.lang.reflect.Method.invokeNative(Native Method)
    at java.lang.reflect.Method.invoke(Method.java:511)
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1102)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:869)
    at dalvik.system.NativeStart.main(Native Method)

Answer 1

图像太大，无法在内存中完整加载。你需要缩小它：

BitmapFactory.Options opts = new BitmapFactory.Options();
opts.inSampleSize = 2; // Power of 2
Bitmap bm = BitmapFactory.decodeFile(imageLocation, opts);

Answer 2

您需要缩放图像以减少生成位图所需的存储空间这里是社区 post 你可以参考： Avoid OutOfMemoryException

Answer 3

你应该阅读 Loading Large Bitmaps Efficiently

,很抱歉我不能做一个common

从相机加载图像时内存不足

OutOfMemory when loading image from camera

android

android-camera

android-bitmap