Question

我的应用中的用户可以选择拍摄图像/从图库中选择，然后裁剪图像。在大多数设备上一切正常，但有些裁剪失败，并且无法保存裁剪的照片＆＃34;消息出现（我知道这发生在HTC上的一个m8我手边没有这个设备来检查它）。我正在使用xamarin进行开发，但它基本上与java中的代码相同。

以下是用于从图库中选择的代码：

protected void ChooseFromGallery ()
        {
            Intent intent = new Intent (Intent.ActionPick, MediaStore.Images.Media.ExternalContentUri);
            intent.SetType ("image/*");
            StartActivityForResult (intent, ChooseImageCode);

        }

此代码处理结果：

if (requestCode == ChooseImageCode && resultCode == Result.Ok)
        {
            Uri selectedImage = data.Data;
            var input = this.ContentResolver.OpenInputStream (selectedImage);
            SharedContext.Bitmap = BitmapFactory.DecodeStream (input);
            CropImage (selectedImage);
        }

这是裁剪图像方法：

protected void CropImage (Uri imageUri)
        {            
            Intent intent = new Intent ("com.android.camera.action.CROP");
            intent.SetType ("image/*");
            _targetUri = FileUtils.GetTempUri ();
            IList<ResolveInfo> list = PackageManager.QueryIntentActivities (intent, 0);

            int size = list.Count;

            if (size == 0)
            {
                Toast.MakeText (this, "Can not find image crop app", ToastLength.Short).Show ();
                return;
            }
            else
            {
                intent.SetData (imageUri);
                intent.PutExtra ("outputX", 640);
                intent.PutExtra ("outputY", 640);
                intent.PutExtra ("aspectX", 1);
                intent.PutExtra ("aspectY", 1);
                intent.PutExtra ("output", _targetUri);
                intent.PutExtra ("outputFormat", Bitmap.CompressFormat.Png);
                intent.PutExtra ("scale", true);

                if (size >= 1)
                {
                    Intent i = new Intent (intent);
                    ResolveInfo res = list [0];

                    i.SetComponent (new ComponentName (res.ActivityInfo.PackageName, res.ActivityInfo.Name));

                    StartActivityForResult (i, CropPictureRequestCode);
                } 
            }
        }

我有没有想念。

Answer 1

我一直在开发一款可以裁剪屏幕截图的应用：

**within fragment**

// get screen shot
Bitmap bmp = screenShot(v);
bmp = Bitmap.createBitmap(bmp, 0, 0, v.getWidth(), 450);

调用保存的方法：

// SAVE SCREEN SHOT TO INTERNAL STORAGE AND RETURN PATH TO IMAGE
// ****************************************************************
private String saveToInternalStorage(View v, Bitmap bitmapImage) {

    ContextWrapper cw = new ContextWrapper(v.getContext());

    TinyDB tinydb = new TinyDB(v.getContext());
    int counter = tinydb.getInt("counter"); // get workout #
    String imageDir = weekWorkout[counter];

    // path to /data/data/yourapp/app_data/imageDir
    File directory = cw.getDir(imageDir, Context.MODE_PRIVATE);
    // Create imageDir
    File mypath = new File(directory, imageDir + ".jpg");

    ArrayList<String> imageAddressJpgList = new ArrayList<String>();
    imageAddressJpgList = tinydb.getList("imageAddressJpgList");
    imageAddressJpgList.add(counter, imageDir + ".jpg");
    tinydb.putList("imageAddressJpgList", imageAddressJpgList);

    FileOutputStream fos = null;
    try {
        fos = new FileOutputStream(mypath);

        // Use the compress method on the BitMap object to write image to
        // the OutputStream
        bitmapImage.compress(Bitmap.CompressFormat.PNG, 100, fos);
        fos.close();
    } catch (Exception e) {
        e.printStackTrace();
    }

    return directory.getAbsolutePath();
}

// TAKES SCREEN SHOT
// ********************
public Bitmap screenShot(View view) {
    Bitmap bitmap = Bitmap.createBitmap(view.getWidth(), view.getHeight(),
            Config.ARGB_8888);
    Canvas canvas = new Canvas(bitmap);
    view.draw(canvas);
    return bitmap;
}

TinyDB是我在git btw上找到的一个已保存的参考魔术课。

我怀疑这会有所帮助，但我只是觉得我想开始参与。

裁剪图像有时会失败

1 个答案: