您好我想在 SD 卡上指定一个文件夹以检索该文件夹子文件夹(例如 /mnt/sdcard/Folder/SubFolder)中的所有图像。我有这个:
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.gallery);
GridView gridview = (GridView) findViewById(R.id.gallery);
registerForContextMenu(gridview);
id = getIntent().getExtras().getString("ID");
// Set up an array of the Thumbnail Image ID column we want
String[] projection = {MediaStore.Images.Thumbnails._ID};
// Create the cursor pointing to the SDCard
cursor = managedQuery( MediaStore.Images.Thumbnails.EXTERNAL_CONTENT_URI,
projection, // Which columns to return
null, // Return all rows
null,
MediaStore.Images.Thumbnails.IMAGE_ID);
// Get the column index of the Thumbnails Image ID
columnIndex = cursor.getColumnIndexOrThrow(MediaStore.Images.Thumbnails._ID);
在我的 gridview 的 setAdapter 中,我有:
gridview.setAdapter(new BaseAdapter() {
public View getView(int position, View convertView, ViewGroup parent) {
ImageView picturesView;
if (convertView == null) {
picturesView = new ImageView(mContext);
// Move cursor to current position
cursor.moveToPosition(position);
// Get the current value for the requested column
int imageID = cursor.getInt(columnIndex);
// Set the content of the image based on the provided URI
picturesView.setImageURI(Uri.withAppendedPath(MediaStore.Images.Thumbnails.EXTERNAL_CONTENT_URI, "" + imageID));
picturesView.setScaleType(ImageView.ScaleType.FIT_CENTER);
picturesView.setPadding(8, 8, 8, 8);
picturesView.setLayoutParams(new GridView.LayoutParams(100, 100));
}
else {
picturesView = (ImageView)convertView;
}
return picturesView;
}
public int getCount() {
return cursor.getCount();
}
public Object getItem(int position) {
return position;
}
public long getItemId(int position) {
return position;
}
});
这行得通,但向我显示 sdcard 中包含的所有图像...我尝试设置一个 URI 路径,例如“content:///mnt/sdcard/folder/subfolder”,但它不起作用...我怎么能在 MediaStore managedQuery 中指定要扫描的特定文件夹?
谢谢大家!:)