Android studio简单的音乐播放器

好的，我可以为你提供一个简单的Android Studio音乐播放器的示例代码。以下是基本步骤：

1.在Android Studio中创建一个新项目。
2.将音乐文件存储在app/src/main/res/raw目录下。
3.在app/build.gradle文件中添加以下依赖项：

implementation 'com.google.android.exoplayer:exoplayer:2.11.2'

4.在app/src/main/java/包名/MainActivity.java文件中添加以下代码：

import android.net.Uri;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;
import androidx.appcompat.app.AppCompatActivity;
import com.google.android.exoplayer2.ExoPlayerFactory;
import com.google.android.exoplayer2.SimpleExoPlayer;
import com.google.android.exoplayer2.extractor.DefaultExtractorsFactory;
import com.google.android.exoplayer2.extractor.ExtractorsFactory;
import com.google.android.exoplayer2.source.ExtractorMediaSource;
import com.google.android.exoplayer2.source.MediaSource;
import com.google.android.exoplayer2.trackselection.DefaultTrackSelector;
import com.google.android.exoplayer2.ui.PlayerView;
import com.google.android.exoplayer2.upstream.DataSource;
import com.google.android.exoplayer2.upstream.DefaultDataSourceFactory;
import com.google.android.exoplayer2.util.Util;

public class MainActivity extends AppCompatActivity {

    private PlayerView mPlayerView;
    private SimpleExoPlayer mExoPlayer;

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

        mPlayerView = findViewById(R.id.player_view);
        Button mButtonPlay = findViewById(R.id.button_play);
        Button mButtonPause = findViewById(R.id.button_pause);

        mButtonPlay.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                initializePlayer();
            }
        });

        mButtonPause.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                releasePlayer();
            }
        });
    }

    private void initializePlayer() {
        mExoPlayer = ExoPlayerFactory.newSimpleInstance(this, new DefaultTrackSelector());
        mPlayerView.setPlayer(mExoPlayer);

        Uri uri = Uri.parse("android.resource://" + getPackageName() + "/" + R.raw.your_music_file_name);

        DataSource.Factory dataSourceFactory = new DefaultDataSourceFactory(this, Util.getUserAgent(this, getString(R.string.app_name)));
        ExtractorsFactory extractorsFactory = new DefaultExtractorsFactory();
        MediaSource mediaSource = new ExtractorMediaSource(uri, dataSourceFactory, extractorsFactory, null, null);

        mExoPlayer.prepare(mediaSource);
        mExoPlayer.setPlayWhenReady(true);
    }

    private void releasePlayer() {
        if (mExoPlayer != null) {
            mExoPlayer.release();
            mExoPlayer = null;
            Toast.makeText(this, "MediaPlayer released", Toast.LENGTH_SHORT).show();
        }
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        releasePlayer();
    }
}

5.在app/src/main/res/layout/activity_main.xml文件中添加以下代码：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

    <com.google.android.exoplayer2.ui.PlayerView
        android:id="@+id/player_view"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        android:background="@android:color/black"/>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal"
        android:gravity="center">

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

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

    </LinearLayout>

</LinearLayout>

这是一个简单的Android Studio音乐播放器的示例代码。你可以根据自己的需求进行更改和扩展。