Android studio媒体播放器无法工作_Android_Android Mediaplayer

Android studio媒体播放器无法工作

android

Android studio媒体播放器无法工作,android,android-mediaplayer,Android,Android Mediaplayer,我有一个问题，即在按下播放按钮时无法播放媒体播放器，即使歌曲在原始目录中下面是代码 public class MainActivity extends AppCompatActivity { private MediaPlayer mediaPlayer; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState);

我有一个问题，即在按下播放按钮时无法播放媒体播放器，即使歌曲在原始目录中

下面是代码

public class MainActivity extends AppCompatActivity {

    private MediaPlayer mediaPlayer;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        mediaPlayer = MediaPlayer.create(this,R.raw.song);

        Button play = (Button) findViewById(R.id.play);

        Button pause = (Button) findViewById(R.id.pause);


        play.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                //Toast.makeText(MainActivity.this,"Play",Toast.LENGTH_SHORT).show();
                mediaPlayer.start();
            }
        });


        pause.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                //Toast.makeText(MainActivity.this,"Pause",Toast.LENGTH_SHORT).show();
                mediaPlayer.pause();
            }
        });

    }


}

下面是布局文件：

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/activity_main"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    android:orientation="vertical"
    tools:context="com.example.android.musicplayer.MainActivity">


    <Button
        android:id="@+id/play"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Play"/>

    <Button
        android:id="@+id/pause"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Pause"/>


</LinearLayout>

我发现SoundPoolPlayer比mediaplayer更好
SoundPoolPlayer使用setOnCompletionListener从Android SoundPool定制扩展，没有MediaPlayer的低效缺点

创建：

SoundPoolPlayer mPlayer = SoundPoolPlayer.create(context, resId);
mPlayer.setOnCompletionListener(
    new MediaPlayer.OnCompletionListener() {
        @Override
        public void onCompletion(MediaPlayer mp) {  //mp will be null here
            Log.d("debug", "completed");
        }
    };
);

mPlayer.play()

mPlayer.pause();

mPlayer.stop();

mPlayer.resume();

mPlayer.isPlaying();

播放：

SoundPoolPlayer mPlayer = SoundPoolPlayer.create(context, resId);
mPlayer.setOnCompletionListener(
    new MediaPlayer.OnCompletionListener() {
        @Override
        public void onCompletion(MediaPlayer mp) {  //mp will be null here
            Log.d("debug", "completed");
        }
    };
);

mPlayer.play()

mPlayer.pause();

mPlayer.stop();

mPlayer.resume();

mPlayer.isPlaying();

暂停：

SoundPoolPlayer mPlayer = SoundPoolPlayer.create(context, resId);
mPlayer.setOnCompletionListener(
    new MediaPlayer.OnCompletionListener() {
        @Override
        public void onCompletion(MediaPlayer mp) {  //mp will be null here
            Log.d("debug", "completed");
        }
    };
);

mPlayer.play()

mPlayer.pause();

mPlayer.stop();

mPlayer.resume();

mPlayer.isPlaying();

停止：

SoundPoolPlayer mPlayer = SoundPoolPlayer.create(context, resId);
mPlayer.setOnCompletionListener(
    new MediaPlayer.OnCompletionListener() {
        @Override
        public void onCompletion(MediaPlayer mp) {  //mp will be null here
            Log.d("debug", "completed");
        }
    };
);

mPlayer.play()

mPlayer.pause();

mPlayer.stop();

mPlayer.resume();

mPlayer.isPlaying();

简历：

SoundPoolPlayer mPlayer = SoundPoolPlayer.create(context, resId);
mPlayer.setOnCompletionListener(
    new MediaPlayer.OnCompletionListener() {
        @Override
        public void onCompletion(MediaPlayer mp) {  //mp will be null here
            Log.d("debug", "completed");
        }
    };
);

mPlayer.play()

mPlayer.pause();

mPlayer.stop();

mPlayer.resume();

mPlayer.isPlaying();

显示：

SoundPoolPlayer mPlayer = SoundPoolPlayer.create(context, resId);
mPlayer.setOnCompletionListener(
    new MediaPlayer.OnCompletionListener() {
        @Override
        public void onCompletion(MediaPlayer mp) {  //mp will be null here
            Log.d("debug", "completed");
        }
    };
);

mPlayer.play()

mPlayer.pause();

mPlayer.stop();

mPlayer.resume();

mPlayer.isPlaying();

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