这是一个简单的钢琴应用程序,它可以工作,但有一个问题。大约20次点击后(有时它只是28次点击),即使我点击它没有播放任何声音的按钮。该应用程序没有崩溃或没有任何警告我。这没什么。没有声音。你有什么想法吗?
package com.example.playaudio;
import android.app.Activity;
import android.media.AudioManager;
import android.media.MediaPlayer;
import android.os.Bundle;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
public class MainActivity extends Activity implements OnClickListener{
private MediaPlayer mp;
private MediaPlayer mp2;
private MediaPlayer mp3;
private MediaPlayer mp4;
private MediaPlayer mp5;
private MediaPlayer mp6;
private MediaPlayer mp7;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
setVolumeControlStream(AudioManager.STREAM_MUSIC);
Button button1=(Button)findViewById(R.id.button_1);
Button button2=(Button)findViewById(R.id.button_2);
Button button3=(Button)findViewById(R.id.button_3);
Button button4=(Button)findViewById(R.id.button_4);
Button button5=(Button)findViewById(R.id.button_5);
Button button6=(Button)findViewById(R.id.button_6);
Button button7=(Button)findViewById(R.id.button_7);
button1.setOnClickListener(this);
button2.setOnClickListener(this);
button3.setOnClickListener(this);
button4.setOnClickListener(this);
button5.setOnClickListener(this);
button6.setOnClickListener(this);
button7.setOnClickListener(this);
}
public void onClick(View v) {
int resId;
int resId2;
int resId3;
int resId4;
int resId5;
int resId6;
int resId7;
switch (v.getId()) {
case R.id.button_1:
resId = R.raw.a;
mp = MediaPlayer.create(this, resId);
mp.start();
break;
case R.id.button_2:
resId2 = R.raw.b;
mp2 = MediaPlayer.create(this, resId2);
mp2.start();
break;
case R.id.button_3:
resId3 = R.raw.c;
mp3 = MediaPlayer.create(this, resId3);
mp3.start();
break;
case R.id.button_4:
resId4 = R.raw.d;
mp4 = MediaPlayer.create(this, resId4);
mp4.start();
break;
case R.id.button_5:
resId5 = R.raw.e;
mp5 = MediaPlayer.create(this, resId5);
mp5.start();
break;
case R.id.button_6:
resId6 = R.raw.f;
mp6 = MediaPlayer.create(this, resId6);
mp6.start();
break;
case R.id.button_7:
resId7 = R.raw.p;
mp7 = MediaPlayer.create(this, resId7);
mp7.start();
break;
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.activity_main, menu);
return true;
}
}
答案 0 :(得分:6)
看起来您正在创建一个新的MediaPlayer实例来播放每个声音。您应该重复使用它们或清理它们。
来自documentation of the MediaPlayer.create()方法:
为给定资源ID创建MediaPlayer的便捷方法。上 成功,prepare()已经被调用,绝不可以 再次打电话。
完成MediaPlayer后,您应该调用release()来释放 资源。如果没有发布,将导致过多的MediaPlayer实例 在一个例外中。
答案 1 :(得分:0)
简单的方法是添加onComplationListener
mp.setOnCompletionListener(new MediaPlayer.OnCompletionListener() {
@Override
public void onCompletion(MediaPlayer p1) {
p1.release();
}
});