Android开发手册Button按钮实现点击音效

<?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">
    <Button
        android:id="@+id/btnAudio"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="点击音效" />
</LinearLayout>

public class TestActivity extends AppCompatActivity {
    private Button btnAudio;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_test); 
        initView();
        btnAudio.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                //播放音频
                AudioBtnUtils btnUtils=new AudioBtnUtils(TestActivity.this);
            }
        });
    }
    private void initView() {
        btnAudio = (Button) findViewById(R.id.btnAudio);
    }
}

public class AudioBtnUtils {
    private SoundPool.Builder builder;
    private SoundPool soundpool;
    private int soundId;
    public AudioBtnUtils(Context context) {
        builder = new SoundPool.Builder();
        //AudioAttributes是一个封装音频各种属性的方法
        AudioAttributes.Builder attrBuilder = new AudioAttributes.Builder();
        //设置音频流的合适的属性
        attrBuilder.setLegacyStreamType(AudioManager.STREAM_SYSTEM);
        soundpool = builder.build();
        soundId = soundpool.load(context, R.raw.audio_btn_click, 1);
        //是否加载完成的监听
        soundpool.setOnLoadCompleteListener((soundPool, sampleId, status) -> {
            //加载完毕后再播放
            soundpool.play(soundId, 1f, 1f, 0, 0, 1);
        });
    }
}