java - SetImageBitMap 在 api 23 android java 中不起作用

Question

我正在尝试使用位图将照片从图库上传到我的应用程序，在我的模拟器(api 22)中它可以工作，但由于某种原因，在我的手机(api 23)中它不起作用，图片不会仅显示空白页面。如果重要的话，这是我的代码:

public class Photoactivity extends Activity {

private static final int SELECTED_PICTURE=1;
ImageView iv;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_photoactivity);

    iv=(ImageView)findViewById(R.id.ImgView);
}
public void btnClick(View v){
        Intent i = new Intent(Intent.ACTION_PICK, android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
        startActivityForResult(i, SELECTED_PICTURE);

}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    // TODO Auto-generated method stub
    super.onActivityResult(requestCode, resultCode, data);

    switch (requestCode) {
        case SELECTED_PICTURE:
            if(resultCode==RESULT_OK){
                Uri selectedImage = data.getData();
                String[] filePathColumn = { MediaStore.Images.Media.DATA };
                Cursor cursor = getContentResolver().query(selectedImage,filePathColumn, null, null, null);
                cursor.moveToFirst();
                int columnIndex = cursor.getColumnIndex(filePathColumn[0]);
                String picturePath = cursor.getString(columnIndex);
                cursor.close();
                ImageView imageView = (ImageView) findViewById(R.id.ImgView);
                imageView.setImageBitmap(BitmapFactory.decodeFile(picturePath));

            }
            break;

        default:
            break;
    }

}

}

Answer 1

替换这个:

    case SELECTED_PICTURE:
        if(resultCode==RESULT_OK){
            Uri selectedImage = data.getData();
            String[] filePathColumn = { MediaStore.Images.Media.DATA };
            Cursor cursor = getContentResolver().query(selectedImage,filePathColumn, null, null, null);
            cursor.moveToFirst();
            int columnIndex = cursor.getColumnIndex(filePathColumn[0]);
            String picturePath = cursor.getString(columnIndex);
            cursor.close();
            ImageView imageView = (ImageView) findViewById(R.id.ImgView);
            imageView.setImageBitmap(BitmapFactory.decodeFile(picturePath));

        }
        break;

这样:

    case SELECTED_PICTURE:
        if(resultCode==RESULT_OK){
            InputStream is=getContentResolver().openInputStream(data.getData());
            imageView.setImageBitmap(BitmapFactory.decodeStream(is));
        }
        break;

更好的是，切换到使用 an image-loading library ，如Picasso ，因此此 I/O 可以在后台线程上完成，因此您的 UI 在加载图像时不会卡住。