从android camera返回的字节中保存图像意图保存为小图像

Question

私人意图cameraIntent=null；

public void onCreate(Bundle savedInstanceState) {
              super.onCreate(savedInstanceState);

cameraIntent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE); 
startActivityForResult(cameraIntent, CAMERA_PIC_REQUEST);

}

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

if (requestCode == CAMERA_PIC_REQUEST) {  
    if (resultCode == RESULT_OK) {
      if ( data != null)
        {
           Bitmap myImage = null;
           Bitmap imageBitmap = (Bitmap) data.getExtras().get("data");
           ByteArrayOutputStream stream = new ByteArrayOutputStream();
           imageBitmap.compress(Bitmap.CompressFormat.JPEG, 100,stream);
           byte[] byteArray = stream.toByteArray();
           BitmapFactory.Options options = new BitmapFactory.Options();
           myImage = BitmapFactory.decodeByteArray(byteArray, 0,byteArray.length, options);
           fileOutputStream = new FileOutputStream(sPath);
           BufferedOutputStream bos = new BufferedOutputStream(fileOutputStream);
           myImage.compress(CompressFormat.JPEG, 100, bos);
           bos.flush();
           bos.close();
        }
    }
}
}

Answer 1

data.getExtras（“data”）只返回缩略图。为了获得全尺寸的图像，您需要向camera intent传递一个文件，以便在其中存储该图像，并在以后检索该图像。下面是一个粗略的例子。

开始意图：

File dir = new File(Environment.getExternalStorageDirectory() + "/dcim/myappname");
File mFile = File.createTempFile("myImage", ".png", dir);

Intent cameraIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
cameraIntent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(mFile));
startActivityForResult(cameraIntent, CAMERA_PIC_REQUEST);

onActivityResult内部：

if (resultCode == RESULT_OK) {
   Bitmap bm = BitmapFactory.decodeFile(mFile.getAbsolutePath());
}
// do whatever you need with the Bitmap