android - ImageView 不显示图像

Question

我在我的应用程序中使用相机。我需要拍照并且应该在 imageview 中显示它。我正在使用以下代码从相机拍照并显示它。

    Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
    intent.putExtra(MediaStore.EXTRA_OUTPUT, capturedImageUri);
    startActivityForResult(intent, 0);
    imageView.setImageURI(capturedImageUri);

这仅适用于两个或有时三个图像，然后 imageview 不显示图像，但图像正确地存储在 SD 卡中。或者我也用过

   BitmapFactory.Options options = new BitmapFactory.Options();
   options.inPreferredConfig = Bitmap.Config.ARGB_8888; 
   Bitmap bitmap = BitmapFactory.decodeFile(photoPath, options);
   Imageview.setImageBitmap(bitmap);

但是我也遇到了同样的问题。任何人都可以帮助我吗？

Answer 1

capturedImageUri  will return path to captured Image not the actual Image..

此外，重要说明——如果您不需要全尺寸图像，请使用-

   // cameraIntent.putExtra(MediaStore.EXTRA_OUTPUT, mImageUri);   Comment this line
    Bitmap image = (Bitmap) data.getExtras().get("data");

要获取完整尺寸的位图，请使用以下代码-

  Intent cameraIntent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
                try
                {
                    // place where to store camera taken picture
                    tempPhoto = createTemporaryFile("picture", ".png");
                    tempPhoto.delete();
                }
                catch(Exception e)
                {

                    return ;
                }
                mImageUri = Uri.fromFile(tempPhoto);
                cameraIntent.putExtra(MediaStore.EXTRA_OUTPUT, mImageUri);
                startActivityForResult(cameraIntent, 1);

private File createTemporaryFile(String part, String ext) throws Exception
    {
           // File to store image temperarily.
        File tempDir= Environment.getExternalStorageDirectory();
        tempDir=new File(tempDir.getAbsolutePath()+"/.temp/");
        if(!tempDir.exists())
        {
            tempDir.mkdir();
        }
        return File.createTempFile(part, ext, tempDir);
    }




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

            ContentResolver cr = getApplicationContext().getContentResolver();
            try {
                cr.notifyChange(mImageUri, null);
                File imageFile = new File(tempPhoto.getAbsolutePath());


            } catch (Exception e) {
                e.printStackTrace();
            }

            Bitmap photo=null;
            if (resultCode == 1) {
                try {
                    photo = android.provider.MediaStore.Images.Media.getBitmap(cr, Uri.fromFile(tempPhoto));
imageView.setImageBitmap(photo);
                } catch (FileNotFoundException e) {

                    e.printStackTrace();
                } catch (Exception e) {

                    e.printStackTrace();


}