Android打开系统的Document文档图片选择

    private void startAcitivty() {
        Intent intent = new Intent();
        intent.setAction("android.intent.action.GET_CONTENT");
        intent.setType("image/*");
        startActivityForResult(intent,1001);
    }

    
    @Override
    protected void onActivityResult(int req, int res, Intent intent) {
        Log.d("onActivityResult","1:" + req);
        Log.d("onActivityResult","2:" + res);
        Log.d("onActivityResult","3:" + intent);
        if (intent != null) {
            String data = intent.getDataString();
            try {
                Log.d("onActivityResult","4:" + URLDecoder.decode(data, "UTF-8"));
                queryImage(URLDecoder.decode(data, "UTF-8"));
            } catch (UnsupportedEncodingException e) {
                e.printStackTrace();
            }
        }
        
    }

    private void queryImage(String data) {
        String _path="_data";
        String _album="bucket_display_name";
        int idx = data.lastIndexOf(":");
        String id = null;
        if (idx != -1) {
            id = data.substring(idx + 1);
        }
        Log.d("onActivityResult","id:" + id);
        Cursor cursor = getContentResolver().query(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, null, "_id=" + id, null, null);
        if (cursor.moveToFirst()) {
            String path=cursor.getString(cursor.getColumnIndex(_path));
            String album=cursor.getString(cursor.getColumnIndex(_album));  
            Log.d("onActivityResult","path:" + path + "," + album);
            
            File f = new File(path);
            if (f.exists()) {
                Bitmap b = BitmapFactory.decodeFile(path);
                imageView.setImageBitmap(b);
            }
            
        }
        cursor.close();
    }