Picasso 无法加载大图像（来自相机和本地 Uri）

Question

我在使用 Picasso 时遇到问题，尝试从图库和相机意图中的格式 content://com.android.providers.media.documents/document/imageXXYYZZ 的本地 Uri 加载大图像.

我正在使用标准调用加载图像：

Picasso.load(image_url)
        .resize(600, 240)
        .centerCrop()
        .into(imageTarget);

我在这里附加了一个Target，当我触发onBitmapFailed(Drawable errorDrawable) 错误时。另外，当我登录毕加索时，我得到：

06-23 12:13:54.267  22393-22393/it.b3lab.friendipity D/Picasso﹕ Main        created      [R100] Request{content://com.android.providers.media.documents/document/image%3A13345 resize(600,240) centerCrop}
06-23 12:13:54.277  22393-23010/it.b3lab.friendipity D/Picasso﹕ Dispatcher  enqueued     [R100]+9ms
06-23 12:13:54.285  22393-23038/it.b3lab.friendipity D/Picasso﹕ Hunter      executing    [R100]+15ms
06-23 12:13:54.813  22393-23010/it.b3lab.friendipity D/Picasso﹕ Dispatcher  batched      [R100]+546ms for error
06-23 12:13:55.014  22393-23010/it.b3lab.friendipity D/Picasso﹕ Dispatcher  delivered    [R100]+746ms
06-23 12:13:55.024  22393-22393/it.b3lab.friendipity I/picasso﹕ failed to load bitmap
06-23 12:13:55.024  22393-22393/it.b3lab.friendipity D/Picasso﹕ Main        errored      [R100]+756ms

只有当我尝试从图库（大约 1 MB 以上）和使用高分辨率相机智能手机（在我的情况下是在 Android 上运行的 Moto G）时从相机意图加载大图像时，才会发生这种情况5.0.1)。我在 Android 4.4 上使用 Samsung S2 时没有收到此错误。

任何帮助将不胜感激！谢谢

Answer 1

您需要将内容 uri 解析为绝对 uri。比如这样：

public String getAbsolutePathFromURI( Uri contentUri ) {
  String[] proj = { MediaStore.Images.Media.DATA };
  Cursor cursor = activity.getContentResolver().query( contentUri, proj, null, null, null );
  int columnIndex = cursor.getColumnIndexOrThrow( MediaStore.Images.Media.DATA );
  cursor.moveToFirst();
  String path = cursor.getString( columnIndex );
  cursor.close();
  return path;
}

Answer 2

我花了很多时间研究如何使用 Picasso 将大图像加载到图像视图中。它在 genymotion 上工作，但在我的 moto x 上没有工作。所以我最终决定在异步任务中手动调整图像大小，然后将其加载到图像视图中不使用毕加索。

new AsyncTask<String, Void, Void>() {
                @Override
                protected Void doInBackground(String... params) {
                    String path = params[0];
                    final Bitmap resizedBitmap = ImageUtils.getResizedBitmap(200, 200, PATH_TO_IMAGE);
                    getActivity().runOnUiThread(new Runnable() {
                        @Override
                        public void run() {
                            imageView.setImageBitmap(resizedBitmap);
                        }
                    });
                    return null;
                }
            }.execute(imageLoadPath);

你可以找到ImageUtils.getResizedBitmap()方法here

Answer 3

毕加索失败了，但这很完美

   public static void resizeImage(String file, int maxTargetWidth, int maxTargetHeight) {
    try {
        InputStream in = new FileInputStream(file);

        BitmapFactory.Options options = new BitmapFactory.Options();
        options.inJustDecodeBounds = true;
        BitmapFactory.decodeStream(in, null, options);
        close(in);

        int inWidth = options.outWidth;
        int inHeight = options.outHeight;

        in = new FileInputStream(file);
        options = new BitmapFactory.Options();
        options.inSampleSize = Math.max(inWidth / maxTargetWidth, inHeight / maxTargetHeight);
        Bitmap roughBitmap = BitmapFactory.decodeStream(in, null, options);

        Matrix m = new Matrix();
        RectF inRect = new RectF(0, 0, roughBitmap.getWidth(), roughBitmap.getHeight());
        RectF outRect = new RectF(0, 0, maxTargetWidth, maxTargetHeight);
        m.setRectToRect(inRect, outRect, CENTER);
        float[] values = new float[9];
        m.getValues(values);

        Bitmap resizedBitmap = createScaledBitmap(roughBitmap,
                (int) (roughBitmap.getWidth() * values[0]), (int) (roughBitmap.getHeight() * values[4]),
                true);

        resizedBitmap = rotateBitmap(file, resizedBitmap);
        FileOutputStream out = new FileOutputStream(file);
        resizedBitmap.compress(Bitmap.CompressFormat.JPEG, 80, out);
        close(out);
    } catch (Exception e) {
        error(e);
    }
}

private static Bitmap rotateBitmap(String src, Bitmap bitmap) {
    try {
        int orientation = new ExifInterface(src).getAttributeInt(TAG_ORIENTATION, 1);
        Matrix matrix = new Matrix();
        if (orientation == ORIENTATION_NORMAL) return bitmap;
        if (orientation == ORIENTATION_FLIP_HORIZONTAL) matrix.setScale(-1, 1);
        else if (orientation == ORIENTATION_ROTATE_180) matrix.setRotate(180);
        else if (orientation == ORIENTATION_FLIP_VERTICAL) {
            matrix.setRotate(180);
            matrix.postScale(-1, 1);
        } else if (orientation == ORIENTATION_TRANSPOSE) {
            matrix.setRotate(90);
            matrix.postScale(-1, 1);
        } else if (orientation == ORIENTATION_ROTATE_90) {
            matrix.setRotate(90);
        } else if (orientation == ORIENTATION_TRANSVERSE) {
            matrix.setRotate(-90);
            matrix.postScale(-1, 1);
        } else if (orientation == ORIENTATION_ROTATE_270) {
            matrix.setRotate(-90);
        } else return bitmap;
        try {
            Bitmap oriented = createBitmap(bitmap, 0, 0,
                    bitmap.getWidth(), bitmap.getHeight(), matrix, true);
            bitmap.recycle();
            return oriented;
        } catch (OutOfMemoryError e) {
            error(e);
        }
    } catch (IOException e) {
        error(e);
    }
    return bitmap;
}

Answer 4

试试这个：

Uri uri = Uri.parse(imageUri);
Picasso.with(context)
    .load(uri)
    .fit()
    .resize(600, 240)
    .skipMemoryCache()
    .transform(new DocumentExifTransformation(this, uri))
    .into(imageView);

如果我不工作，请看这里https://github.com/square/picasso/issues/539