如何设置输出图像使用 com.android.camera.action.CROP [英] how to set the output image use com.android.camera.action.CROP

问题描述

我有代码来裁剪图像，如下所示:

I have code to crop an image, like this :

public void doCrop(){
Intent intent = new Intent("com.android.camera.action.CROP");
intent.setType("image/");
List<ResolveInfo> list = getPackageManager().queryIntentActivities(intent,0);
int size = list.size();
if (size == 0 ){
   Toast.makeText(this, "Cant find crop app").show();
   return;
} else{
   intent.setData(selectImageUri);
   intent.putExtra("outputX", 300);
   intent.putExtra("outputY", 300);
   intent.putExtra("aspectX", 1);
   intent.putExtra("aspectY", 1);
   intent.putExtra("scale", true);
   intent.putExtra("return-data", true);
   if (size == 1) {
       Intent i = new Intent(intent);
       ResolveInfo res = list.get(0);
       i.setComponent(new ComponentName(res.activityInfo.packageName, res.activityInfo.name));
       startActivityForResult(i, CROP_RESULT);
   }
}
}

public void onActivityResult (int requestCode, int resultCode, Intent dara){
   if (resultCode == RESULT_OK){
      if (requestCode == CROP_RESULT){
          Bundle extras = data.getExtras();
          if (extras != null){
              bmp = extras.getParcelable("data");
          }
          File f = new File(selectImageUri.getPath());
          if (f.exists()) f.delete();
          Intent inten3 = new Intent(this, tabActivity.class);
          startActivity(inten3);
      }
   }
}

从我读到的，代码 intent.putExtra("outputX", 300);intent.putExtra("outputY", 300); 用于设置裁剪结果的分辨率，但为什么我无法获得高于300x300的结果图像分辨率?当我设置 intent.putExtra("outputX", 800);intent.putExtra("outputY", 800);crop 函数没有结果或崩溃，对这种情况有什么想法吗?

from what i have read, the code intent.putExtra("outputX", 300); intent.putExtra("outputY", 300); is use to set the resolution of crop result, but why i can't get the result image resolution higer than 300x300? when I set the intent.putExtra("outputX", 800); intent.putExtra("outputY", 800); the crop function has no result or crash, any idea for this situation?

日志猫说！！！失败的绑定交易！！！

the log cat say "! ! ! FAILED BINDER TRANSACTION ! ! !

推荐答案

该 Intent 不是公共 Android API 的一部分，并且不能保证在所有设备上都能正常工作.它在 android 1.x 和 2.x 的早期版本中使用过，但不再使用，不推荐使用.这可能就是它到处崩溃或工作不正常的原因.

That Intent is not part of the public Android API and is not guaranteed to work on all devices. It was used in earlier versions of android 1.x and 2.x but it's not used anymore and is not recommended. That is probably why it's crashing all over the palce or working improperly.

使用诸如 Bitmap.createBitmap(..) 或 Bitmap.createScaledBitmap(..) 之类的方法来创建原始图像的调整大小或裁剪版本.这些是 Android API 的一部分，可以保证正常工作.

Use methods such as Bitmap.createBitmap(..) or Bitmap.createScaledBitmap(..) to create a resized or cropped version of your original image. These are part of the Android API and are guaranteed to work.

查看官方文档 此处 和 这里

要裁剪位图，可以使用Bitmap.createBitmap(Bitmap, int x, int y, int width, int height).例如，如果您需要从位图的每一侧裁剪 10 个像素，请使用以下命令:

To crop a bitmap, you can use Bitmap.createBitmap(Bitmap, int x, int y, int width, int height). For example, if you need to crop 10 pixels from each side of a bitmap then use this:

Bitmap croppedBitmap = Bitmap.createBitmap(originalBitmap, 10, 10, originalBitmap.getWidth() - 20, originalBitmap.getHeight() - 20);

如果您需要向用户显示选择器.然后你可以做这样的事情:

If you need to show the selector to the user. Then you can do something like this:

private static final String TEMP_PHOTO_FILE = "temporary_holder.jpg";  

Intent photoPickerIntent = new Intent(Intent.ACTION_PICK, android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
photoPickerIntent.setType("image/*");
photoPickerIntent.putExtra("crop", "true");
photoPickerIntent.putExtra(MediaStore.EXTRA_OUTPUT, getTempUri());
photoPickerIntent.putExtra("outputFormat", Bitmap.CompressFormat.JPEG.toString());
startActivityForResult(photoPickerIntent, REQ_CODE_PICK_IMAGE);


    private Uri getTempUri() {
    return Uri.fromFile(getTempFile());
    }

    private File getTempFile() {
    if (isSDCARDMounted()) {

    File f = new File(Environment.getExternalStorageDirectory(),TEMP_PHOTO_FILE);
    try {
    f.createNewFile();
    } catch (IOException e) {

    }
    return f;
    } else {
    return null;
    }
    }

    private boolean isSDCARDMounted(){
    String status = Environment.getExternalStorageState();
    if (status.equals(Environment.MEDIA_MOUNTED))
    return true;
    return false;
    }




protected void onActivityResult(int requestCode, int resultCode,
        Intent imageReturnedIntent) {
    super.onActivityResult(requestCode, resultCode, imageReturnedIntent);

    switch (requestCode) {
    case REQ_CODE_PICK_IMAGE:
        if (resultCode == RESULT_OK) {  
          if (imageReturnedIntent!=null){



               File tempFile = getTempFile();

              String filePath= Environment.getExternalStorageDirectory()
            + "/temporary_holder.jpg";
              System.out.println("path "+filePath);


    Bitmap selectedImage =  BitmapFactory.decodeFile(filePath);
    _image = (ImageView) findViewById(R.id.image);
    _image.setImageBitmap(selectedImage );

}
}
}

来自此处的代码

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