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;

@Override
protected 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>