我正在制作视频录制应用程序。我想列出我将存储在特定文件夹中的视频。通过以下代码，我可以从移动设备中获取所有视频。但我需要列出特定视频文件夹。任何人都可以指导我。谢谢你提前
public class VideoListActivity extends Activity {
private Cursor videocursor;
private int video_column_index;
ListView videolist;
int count;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_video_list);
init_phone_video_grid();
}
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.listView1);
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(VideoListActivity.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();
TextView tv = new TextView(vContext.getApplicationContext());
String id = null;
if (convertView == null) {
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);
ImageView iv = new ImageView(vContext);
ContentResolver crThumb = getContentResolver();
BitmapFactory.Options options=new BitmapFactory.Options();
options.inSampleSize = 1;
Bitmap curThumb = MediaStore.Video.Thumbnails.getThumbnail(crThumb, position, MediaStore.Video.Thumbnails.MICRO_KIND, options);
iv.setImageBitmap(curThumb);
tv.setText(id);
} else
tv = (TextView) convertView;
return tv;
}
}
}
答案 0 :(得分：1)
使用此代码：
package com.vt.soc;
import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.database.Cursor;
import android.graphics.Bitmap;
import android.net.Uri;
import android.os.Bundle;
import android.provider.MediaStore;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.BaseAdapter;
import android.widget.GridView;
import android.widget.ImageView;
import android.widget.Toast;
import android.widget.AdapterView.OnItemClickListener;
public class MainActivity extends Activity {
//set constants for MediaStore to query, and show videos
private final static Uri MEDIA_EXTERNAL_CONTENT_URI = MediaStore.Video.Media.EXTERNAL_CONTENT_URI;
private final static String _ID = MediaStore.Video.Media._ID;
private final static String MEDIA_DATA = MediaStore.Video.Media.DATA;
//flag for which one is used for images selection
private GridView _gallery;
private Cursor _cursor;
private int _columnIndex;
private int[] _videosId;
private Uri _contentUri;
String filename;
int flag = 0;
protected Context _context;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
_context = getApplicationContext();
setContentView(R.layout.activity_main);
//set GridView for gallery
_gallery = (GridView) findViewById(R.id.videoGrdVw);
//set default as external/sdcard uri
_contentUri = MEDIA_EXTERNAL_CONTENT_URI;
initVideosId();
//set gallery adapter
setGalleryAdapter();
}
private void setGalleryAdapter() {
_gallery.setAdapter(new VideoGalleryAdapter(_context));
_gallery.setOnItemClickListener(_itemClickLis);
flag = 1;
}
private AdapterView.OnItemClickListener _itemClickLis = new OnItemClickListener()
{
@SuppressWarnings({ "deprecation", "unused", "rawtypes" })
public void onItemClick(AdapterView parent, View v, int position, long id)
{
// Now we want to actually get the data location of the file
String [] proj={MEDIA_DATA};
// We request our cursor again
_cursor = managedQuery(_contentUri,
proj, // Which columns to return
MEDIA_DATA + " like ? ", // WHERE clause; which rows to return (all rows)
new String[] {"%Movies%"}, // WHERE clause selection arguments (none)
null); // Order-by clause (ascending by name)
// We want to get the column index for the data uri
int count = _cursor.getCount();
//
_cursor.moveToFirst();
//
_columnIndex = _cursor.getColumnIndex(MEDIA_DATA);
// Lets move to the selected item in the cursor
_cursor.moveToPosition(position);
// And here we get the filename
filename = _cursor.getString(_columnIndex);
//*********** You can do anything when you know the file path :-)
showToast(filename);
Intent i = new Intent(MainActivity.this, Player.class);
i.putExtra("videoPath", filename);
startActivity(i);
//
}
};
@SuppressWarnings("deprecation")
private void initVideosId() {
try
{
//Here we set up a string array of the thumbnail ID column we want to get back
String [] proj={_ID};
// Now we create the cursor pointing to the external thumbnail store
_cursor = managedQuery(_contentUri,
proj, // Which columns to return
MEDIA_DATA + " like ? ", // WHERE clause; which rows to return (all rows)
new String[] {"%Movies%"}, // WHERE clause selection arguments (none)
null); // Order-by clause (ascending by name)
int count= _cursor.getCount();
// We now get the column index of the thumbnail id
_columnIndex = _cursor.getColumnIndex(_ID);
//initialize
_videosId = new int[count];
//move position to first element
_cursor.moveToFirst();
for(int i=0;i<count;i++)
{
int id = _cursor.getInt(_columnIndex);
//
_videosId[i]= id;
//
_cursor.moveToNext();
//
}
}catch(Exception ex)
{
showToast(ex.getMessage().toString());
}
}
protected void showToast(String msg)
{
Toast.makeText(_context, msg, Toast.LENGTH_LONG).show();
}
//
private class VideoGalleryAdapter extends BaseAdapter
{
public VideoGalleryAdapter(Context c)
{
_context = c;
}
public int getCount()
{
return _videosId.length;
}
public Object getItem(int position)
{
return position;
}
public long getItemId(int position)
{
return position;
}
public View getView(int position, View convertView, ViewGroup parent)
{
ImageView imgVw= new ImageView(_context);;
try
{
if(convertView!=null)
{
imgVw= (ImageView) convertView;
}
imgVw.setImageBitmap(getImage(_videosId[position]));
imgVw.setLayoutParams(new GridView.LayoutParams(200, 200));
imgVw.setPadding(8, 8, 8, 8);
}
catch(Exception ex)
{
System.out.println("MainActivity:getView()-135: ex " + ex.getClass() +", "+ ex.getMessage());
}
return imgVw;
}
// Create the thumbnail on the fly
private Bitmap getImage(int id) {
Bitmap thumb = MediaStore.Video.Thumbnails.getThumbnail(
getContentResolver(),
id, MediaStore.Video.Thumbnails.MICRO_KIND, null);
return thumb;
}
}
}
并添加清单文件的权限：
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
答案 1 :(得分：0)
有点晚，但为未来的观众发帖
Uri uri= MediaStore.Video.Media.EXTERNAL_CONTENT_URI;
String condition=MediaStore.Video.Media.DATA +" like?";
String[] selectionArguments=new String[]{"%FolderPath%"};
String sortOrder = MediaStore.Video.Media.DATE_TAKEN + " DESC";
String[] projection = { MediaStore.Images.Media._ID, MediaStore.Images.Media.BUCKET_ID,
MediaStore.Images.Media.BUCKET_DISPLAY_NAME,MediaStore.Images.Media.DATA };
Cursor cursor = getContentResolver().query(uri,projection, condition, selectionArguments, sortOrder);
int idColumn = cursor.getColumnIndexOrThrow(MediaStore.Images.Media._ID);
int pathColumn=cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
if(cursor!=null){
ContentResolver resolver = getApplicationContext().getContentResolver();
while(cursor3.moveToNext()){
String filePath=cursor.getString(pathColumn);
int id = cursor.getInt(idColumn );
Bitmap thumbNail = bitmap=MediaStore.Video.Thumbnails.getThumbnail(resolver, imageID,
MediaStore.Video.Thumbnails.MICRO_KIND, null);
}
}
答案 2 :(得分：0)
use this code`
String path = Environment.getExternalStorageDirectory().toString()+"/Your Folder/";`
File f = new File(path);
File file[] = f.listFiles();
for (int i=0; i < file.length; i++)
{
Log.d("Files", "FileName:" + file[i].getName());
}
上面的代码为您提供了文件夹中的所有文件，之后您可以分开 使用它的扩展名
答案 3 :(得分：0)
尝试以下代码：
public static ArrayList<File> getListFiles(File parentDir) {
ArrayList<File> inFiles = new ArrayList<File>();
File[] files;
files = parentDir.listFiles();
if (files != null) {
for (File file : files) {
if (file.getName().endsWith(".mp4") ||
file.getName().endsWith(".gif")) {
if (!inFiles.contains(file)) inFiles.add(file);
if (!inFiles.contains(file)) inFiles.add(file);
}
}
}
return inFiles;
}
使用：
private static final String WHATSAPP_STATUSES_LOCATION =
"/storage/emulated/0/yourfoldername";
getListFiles(new File(WHATSAPP_STATUSES_LOCATION));