空游标查询MediaStore.Images.Media

时间:2014-10-14 21:05:47

标签: android

我尝试使用带有contentResolver的MediaStore.Images.Media提供的所有图像获取光标,但光标为空! (我在手机上试了很多图像)。代码是:

公共类MainActivity扩展了ActionBarActivity {

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


    Button buttonLoadImage = (Button) findViewById(R.id.buttonLoadPicture);
    buttonLoadImage.setOnClickListener(new View.OnClickListener() {
        @SuppressLint("NewApi")
        @Override
        public void onClick(View arg0) {
            String[] filePathColumn = { MediaStore.Images.Media.DATA };
            Cursor cursor = getContentResolver().query(MediaStore.Images.Media.INTERNAL_CONTENT_URI, filePathColumn, null,null,null);

            if(cursor.moveToFirst()==false) Log.i("my message","EMPTY");

            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));
        }
    });
}

你知道如何至少有一个非空的游标吗?非常感谢

1 个答案:

答案 0 :(得分:0)

使用EXTERNAL_CONTENT_URI代替INTERNAL_CONTENT_URI

Uri uri = MediaStore.Images.Media.EXTERNAL_CONTENT_URI;
String[] filePathColumn = { MediaStore.Images.Media.DATA };
Cursor cursor = getContentResolver().query(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, filePathColumn , null, null, null);

然后你将有一个包含所有文件路径的光标(MediaStore.Images.Media.DATA)