播放音频

1.设置界面

2.配置权限

3.实现功能

package demo.jq.com.playaudiotest;import android.content.pm.PackageManager;import android.media.MediaPlayer;import android.net.Uri;import android.os.Environment;import android.support.annotation.NonNull;import android.support.v4.app.ActivityCompat;import android.support.v4.content.ContextCompat;import android.support.v4.os.EnvironmentCompat;import android.support.v7.app.AppCompatActivity;import android.os.Bundle;import android.util.Log;import android.view.View;import android.widget.Button;import android.widget.Toast;import java.io.File;import java.util.jar.Manifest;/** * @author jim * implements View.OnClickListener 继承接口 */public class MainActivity extends AppCompatActivity implements View.OnClickListener{    private MediaPlayer mediaPlayer = new MediaPlayer();    private static final String TAG = "MainActivity";    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        Button play = (Button) findViewById(R.id.play);        Button pause = (Button) findViewById(R.id.pause);        Button stop = (Button) findViewById(R.id.stop);        play.setOnClickListener(this);        pause.setOnClickListener(this);        stop.setOnClickListener(this);        if (ContextCompat.checkSelfPermission(MainActivity.this, android.Manifest.permission.WRITE_EXTERNAL_STORAGE)!= PackageManager.PERMISSION_GRANTED) {            ActivityCompat.requestPermissions(MainActivity.this,new String[]{android.Manifest.permission.WRITE_EXTERNAL_STORAGE},1);        } else {            initMediaPlayer();        }    }    private void initMediaPlayer() {        try {            Uri setDataSourceuri = Uri.parse("android.resource://demo.jq.com.playaudiotest/"+R.raw.music);            mediaPlayer.setDataSource(this,setDataSourceuri);            mediaPlayer.prepare();        } catch (Exception e) {            e.printStackTrace();        }    }    @Override    public void onRequestPermissionsResult(int requestCode,  String[] permissions,  int[] grantResults) {        switch (requestCode) {            case 1:                if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {                    initMediaPlayer();                } else {                    Toast.makeText(this,"拒绝权限将无法使用程序",Toast.LENGTH_SHORT).show();                    finish();                }                break;            default:        }    }    @Override    public void onClick(View v) {        switch (v.getId()) {            case R.id.play:                if (!mediaPlayer.isPlaying()) {                    mediaPlayer.start();                }                break;            case R.id.pause:                if (mediaPlayer.isPlaying()) {                    mediaPlayer.pause();                }                break;            case R.id.stop:                if (mediaPlayer.isPlaying()) {                    mediaPlayer.reset();                    initMediaPlayer();                }                break;            default:                break;        }    }    @Override    public void onDestroy() {        super.onDestroy();        if (mediaPlayer != null) {            mediaPlayer.stop();            mediaPlayer.release();        }    }}

这里有个关键就是获取音频文件的地址。

有几种情况，一种是播放sd卡，一种是播放应用中的音频，一种是播放在线的。

上面的案例是播放应用中的。

有意思的！确实能播放！