显示specfic文件夹中的视频缩略图与Android的列表视图 [英] Display specfic folder videos in a listview with Thumbnails android
本文介绍了显示specfic文件夹中的视频缩略图与Android的列表视图的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我试图从SD卡的文件夹XYZ列表视图来显示视频文件，我已经成功地显示，但问题是，它显示存储在SD卡的所有视频文件，甚至开出夹的abc其实我想只存储视频文件在文件夹XYZ来显示。由于有4天，我正在Google上搜寻，但没有找到任何解决方案。我的code是显示所有的视频和完美的工作：
私人光标videocursor;
私人诠释video_column_index;
ListView的videolist;
诠释计数;
的String [] thumbColumns = NULL;
文件videoFiles;
@覆盖
保护无效的onCreate（捆绑savedInstanceState）{
super.onCreate（savedInstanceState）;
的setContentView（R.layout.activity_main）; init_phone_video_grid（）;
@燮pressWarnings（德precation）
私人无效init_phone_video_grid（）{
System.gc（）的;
的String [] = PROJ {MediaStore.Video.Media._ID，
MediaStore.Video.Media.DATA，
MediaStore.Video.Media.DISPLAY_NAME，
MediaStore.Video.Media.SIZE};
videocursor = managedQuery（MediaStore.Video.Media.EXTERNAL_CONTENT_URI，PROJ，
NULL，NULL，NULL）;
数= videocursor.getCount（）;
videolist =（ListView控件）findViewById（R.id.list）;
videolist.setAdapter（新VideoAdapter（getApplicationContext（）））;
videolist.setOnItemClickListener（videogridlistener）;
} 私人OnItemClickListener videogridlistener =新OnItemClickListener（）{
公共无效onItemClick（适配器视图＆LT;＆GT;母公司，视图V，INT位置，
长ID）{
System.gc（）的;
video_column_index = videocursor
.getColumnIndexOrThrow（MediaStore.Video.Media.DATA）;
videocursor.moveToPosition（位置）;
字符串文件名= videocursor.getString（video_column_index）;
意向意图=新意图（MainActivity.this，ViewVideo.class）;
intent.putExtra（videofilename，文件名）;
startActivity（意向）;
}
};
公共类VideoAdapter延伸BaseAdapter {
私人语境vContext; 公共VideoAdapter（上下文C）{
vContext = C;
} 公众诠释的getCount（）{
返回计数;
} 公共对象的getItem（INT位置）{
返回的位置;
} 众长getItemId（INT位置）{
返回的位置;
} 公共查看getView（INT位置，查看convertView，父母的ViewGroup）{
System.gc（）的;
ViewHolder持有人;
字符串ID = NULL;
convertView = NULL;
如果（convertView == NULL）{
convertView = LayoutInflater.from（vContext）.inflate（R.layout.listitem，父母，假）;
持有人=新ViewHolder（）;
holder.txtTitle =（TextView中）convertView.findViewById（R.id.txtTitle）;
holder.txtSize =（TextView中）convertView.findViewById（R.id.txtSize）;
holder.thumbImage =（ImageView的）convertView.findViewById（R.id.imgIcon）; video_column_index = videocursor.getColumnIndexOrThrow（MediaStore.Video.Media.DISPLAY_NAME）;
videocursor.moveToPosition（位置）;
ID = videocursor.getString（video_column_index）;
video_column_index = videocursor.getColumnIndexOrThrow（MediaStore.Video.Media.SIZE）;
videocursor.moveToPosition（位置）;
// ID + =大小（KB）：+ // videocursor.getString（video_column_index）;
holder.txtTitle.setText（ID）;
holder.txtSize.setText（大小（KB）：+ videocursor.getString（video_column_index））; 的String [] = PROJ {MediaStore.Video.Media._ID，
MediaStore.Video.Media.DISPLAY_NAME，
MediaStore.Video.Media.DATA};
@燮pressWarnings（德precation） 光标光标= managedQuery（
MediaStore.Video.Media.EXTERNAL_CONTENT_URI，PROJ，
MediaStore.Video.Media.DISPLAY_NAME +=？，
新的String [] {ID}，NULL）;
cursor.moveToFirst（）; 长IDS = cursor.getLong（cursor.getColumnIndex（MediaStore.Video.Media._ID））; ContentResolver的crThumb = getContentResolver（）;
BitmapFactory.Options选项=新BitmapFactory.Options（）;
options.inSampleSize = 1;
位图curThumb = MediaStore.Video.Thumbnails.getThumbnail（
crThumb，IDS，MediaStore.Video.Thumbnails.MICRO_KIND，
选项）;
holder.thumbImage.setImageBitmap（curThumb）;
curThumb = NULL; }
返回convertView;
}
} 静态类ViewHolder { TextView的txtTitle;
TextView的txtSize;
ImageView的thumbImage;
}
解决方案
试试这个
公共静态最后的String [] = VIDEO_PROJECTION {MediaStore.Video.Media._ID，MediaStore.Video.Media.TITLE，
MediaStore.Video.Media.DATA};公共静态最终乌里VIDEO_SOURCE_URI = MediaStore.Video.Media.EXTERNAL_CONTENT_URI;
使用内容解析查询数据
CursorLoader cursorLoader =新CursorLoader（getActivity（），VIDEO_SOURCE_URI，VIDEO_PROJECTION，MediaStore.Video.Media.DATA +怎么样？，新的String [] {％FOLDER_NAME％} ，
MediaStore.Video.Media.DATA +COLLATE NOCASE ASC;）;
据猎犬从FOLDER_NAME的所有视频文件。因为可以有一个或多个文件夹与名称所以最好是提供绝对路径。
I am trying to display video files in listview from folder 'xyz' on sdcard, i have successfully displayed but problem is that it displays all video files stored on sdcard even out of folder 'abc' actually i want only video files stored in folder 'xyz' to be displayed. I am googling since 4 days but didn't find any solution for that. My code is that is showing all videos and working perfectly :
private Cursor videocursor;
private int video_column_index;
ListView videolist;
int count;
String[] thumbColumns = null ;
File videoFiles;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
init_phone_video_grid();
@SuppressWarnings("deprecation")
private void init_phone_video_grid() {
System.gc();
String[] proj = { MediaStore.Video.Media._ID,
MediaStore.Video.Media.DATA,
MediaStore.Video.Media.DISPLAY_NAME,
MediaStore.Video.Media.SIZE };
videocursor = managedQuery( MediaStore.Video.Media.EXTERNAL_CONTENT_URI,proj,
null, null,null);
count = videocursor.getCount();
videolist = (ListView) findViewById(R.id.list);
videolist.setAdapter(new VideoAdapter(getApplicationContext()));
videolist.setOnItemClickListener(videogridlistener);
}
private OnItemClickListener videogridlistener = new OnItemClickListener() {
public void onItemClick(AdapterView<?> parent, View v, int position,
long id) {
System.gc();
video_column_index = videocursor
.getColumnIndexOrThrow(MediaStore.Video.Media.DATA);
videocursor.moveToPosition(position);
String filename = videocursor.getString(video_column_index);
Intent intent = new Intent(MainActivity.this, ViewVideo.class);
intent.putExtra("videofilename", filename);
startActivity(intent);
}
};
public class VideoAdapter extends BaseAdapter {
private Context vContext;
public VideoAdapter(Context c) {
vContext = c;
}
public int getCount() {
return count;
}
public Object getItem(int position) {
return position;
}
public long getItemId(int position) {
return position;
}
public View getView(int position, View convertView, ViewGroup parent) {
System.gc();
ViewHolder holder;
String id = null;
convertView = null;
if (convertView == null) {
convertView = LayoutInflater.from(vContext).inflate(R.layout.listitem, parent, false);
holder = new ViewHolder();
holder.txtTitle = (TextView) convertView.findViewById(R.id.txtTitle);
holder.txtSize = (TextView) convertView.findViewById(R.id.txtSize);
holder.thumbImage = (ImageView) convertView.findViewById(R.id.imgIcon);
video_column_index = videocursor.getColumnIndexOrThrow(MediaStore.Video.Media.DISPLAY_NAME);
videocursor.moveToPosition(position);
id = videocursor.getString(video_column_index);
video_column_index = videocursor.getColumnIndexOrThrow(MediaStore.Video.Media.SIZE);
videocursor.moveToPosition(position);
// id += " Size(KB):" + // videocursor.getString(video_column_index);
holder.txtTitle.setText(id);
holder.txtSize.setText(" Size(KB):" + videocursor.getString(video_column_index));
String[] proj = { MediaStore.Video.Media._ID,
MediaStore.Video.Media.DISPLAY_NAME,
MediaStore.Video.Media.DATA };
@SuppressWarnings("deprecation")
Cursor cursor = managedQuery(
MediaStore.Video.Media.EXTERNAL_CONTENT_URI, proj,
MediaStore.Video.Media.DISPLAY_NAME + "=?",
new String[] { id }, null);
cursor.moveToFirst();
long ids = cursor.getLong(cursor.getColumnIndex(MediaStore.Video.Media._ID));
ContentResolver crThumb = getContentResolver();
BitmapFactory.Options options = new BitmapFactory.Options();
options.inSampleSize = 1;
Bitmap curThumb = MediaStore.Video.Thumbnails.getThumbnail(
crThumb, ids, MediaStore.Video.Thumbnails.MICRO_KIND,
options);
holder.thumbImage.setImageBitmap(curThumb);
curThumb = null;
}
return convertView;
}
}
static class ViewHolder {
TextView txtTitle;
TextView txtSize;
ImageView thumbImage;
}
解决方案
Try this
public static final String[] VIDEO_PROJECTION = {MediaStore.Video.Media._ID, MediaStore.Video.Media.TITLE,
MediaStore.Video.Media.DATA};
public static final Uri VIDEO_SOURCE_URI = MediaStore.Video.Media.EXTERNAL_CONTENT_URI;
Querying the data using the content resolver
CursorLoader cursorLoader = new CursorLoader(getActivity(), VIDEO_SOURCE_URI, VIDEO_PROJECTION, MediaStore.Video.Media.DATA + " like ? ", new String[]{"%FOLDER_NAME%"},
MediaStore.Video.Media.DATA + " COLLATE NOCASE ASC;");
It retrievers all the video files from the FOLDER_NAME. Since there can be one or more folders with a name so it is better to provide absolute path.
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