ContentProviderMedia获取 外部存储的 音频文件

import android.content.ContentResolver;
import android.content.Intent;
import android.database.Cursor;
import android.net.Uri;
import android.os.Bundle;
import android.provider.MediaStore;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.AdapterView;
import android.widget.CursorAdapter;
import android.widget.ListView;
import android.widget.SimpleCursorAdapter;

import java.io.File;

/**
* 获取 外部存储的 音频文件
* @author alice
*
*/
public class MainActivity extends AppCompatActivity {
private ListView listView;

// 获取外部存储的 音频文件 也可以 修改为 视频 Vedio 或内部存储private Uri mediaUri = MediaStore.Audio.Media.EXTERNAL_CONTENT_URI;private SimpleCursorAdapter adapter;@Overrideprotected void onCreate(Bundle savedInstanceState) {    super.onCreate(savedInstanceState);    setContentView(R.layout.activity_main);    listView = (ListView) findViewById(R.id.listView);    ContentResolver resolver = getContentResolver();    Cursor cursor = resolver.query(mediaUri,            new String[] { MediaStore.Video.Media._ID, MediaStore.Video.Media.DISPLAY_NAME, MediaStore.Video.Media.DATA, MediaStore.Video.Media.TITLE }, null, null, null);    adapter = new SimpleCursorAdapter(MainActivity.this, R.layout.item_layout, cursor,            new String[] { MediaStore.Video.Media.DISPLAY_NAME, MediaStore.Video.Media.DATA, MediaStore.Video.Media.TITLE },            new int[] { R.id.diaplayname_tv, R.id.data_tv, R.id.title_tv },            CursorAdapter.FLAG_REGISTER_CONTENT_OBSERVER);    listView.setAdapter(adapter);    listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {        @Override        public void onItemClick(AdapterView<?> parent, View view, int position, long id) {            // TODO Auto-generated method stub            Cursor c = (Cursor) adapter.getItem(position);            String path = c.getString(c.getColumnIndex(MediaStore.Video.Media.DATA));            // 系统播放音频文件            Intent intent = new Intent();            intent.setAction(Intent.ACTION_VIEW);            intent.setDataAndType(Uri.fromFile(new File(path)), "audio/*");            startActivity(intent);        }    });}

}

MainActivity的布局文件

<RelativeLayout    xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="match_parent"    android:layout_height="match_parent"    tools:context="alice.bw.com.day16contentprovidermedia.MainActivity">    <ListView        android:id="@+id/listView"        android:layout_width="match_parent"        android:layout_height="match_parent" >    </ListView></RelativeLayout>

item_layout

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:orientation="vertical" >    <TextView        android:id="@+id/diaplayname_tv"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="TextView" />    <TextView        android:id="@+id/data_tv"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="TextView" />    <TextView        android:id="@+id/title_tv"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="TextView" /></LinearLayout>

权限

<manifest xmlns:android="http://schemas.android.com/apk/res/android"          package="alice.bw.com.day16contentprovidermedia">    <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>    <application        android:allowBackup="true"        android:icon="@mipmap/ic_launcher"        android:label="@string/app_name"        android:supportsRtl="true"        android:theme="@style/AppTheme">        <activity android:name=".MainActivity">            <intent-filter>                <action android:name="android.intent.action.MAIN"/>                <category android:name="android.intent.category.LAUNCHER"/>            </intent-filter>        </activity>    </application></manifest>