我有播放两个音频的代码，一个是列表中的随机音频，另一个是按钮点击设置。但每当按下按钮时，它都会随机强行关闭。请告诉我这个问题的解决方案。谢谢！
package com.example.btn;
import java.net.SocketException;
import java.util.Random;
import android.app.Activity;
import android.app.AlertDialog;
import android.media.MediaPlayer;
import android.os.Bundle;
import android.os.Handler;
import android.view.View;
public class MainActivity extends Activity {
Handler mHandler; // global instance
Runnable your_runnable; // global instance
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
public void yolo(final View view) {
if (view == view) {
view.setBackgroundResource(R.drawable.btn1);// Change to this when
// clicked
final MediaPlayer mp11 = MediaPlayer.create(getBaseContext(),R.raw.animals009);// get mp3 dir
mp11.start(); // play mp3
mHandler = new Handler();
your_runnable = new Runnable() {
@Override
public void run() {
view.setBackgroundResource(R.drawable.btn2);// Revert back
// to this after
// timer
int[] sounds={R.raw.animals010, R.raw.animals012, R.raw.animals013,R.raw.animals019,R.raw.animals114};
Random r = new Random();
int Low = 0;
int High = 7;
int rndm = r.nextInt(High-Low) + Low;
MediaPlayer mp1 = MediaPlayer.create(getApplicationContext(),sounds[rndm]);
mp1.start();
}
};
mHandler.postDelayed(your_runnable, 3000L);// 3sec timer
}
}
}
log cat
09-01 07:38:41.673: V/MediaPlayer(16923): isPlaying: 1
09-01 07:38:41.673: V/MediaPlayer-JNI(16923): isPlaying: 1
09-01 07:38:42.658: D/AndroidRuntime(16923): Shutting down VM
09-01 07:38:42.658: W/dalvikvm(16923): threadid=1: thread exiting with uncaught exception (group=0x4170fc08)
09-01 07:38:42.663: E/AndroidRuntime(16923): FATAL EXCEPTION: main
09-01 07:38:42.663: E/AndroidRuntime(16923): Process: com.example.btn, PID: 16923
09-01 07:38:42.663: E/AndroidRuntime(16923): java.lang.IllegalStateException: Could not execute method of the activity
09-01 07:38:42.663: E/AndroidRuntime(16923): at android.view.View$1.onClick(View.java:3969)
09-01 07:38:42.663: E/AndroidRuntime(16923): at android.view.View.performClick(View.java:4630)
09-01 07:38:42.663: E/AndroidRuntime(16923): at android.view.View$PerformClick.run(View.java:19339)
09-01 07:38:42.663: E/AndroidRuntime(16923): at android.os.Handler.handleCallback(Handler.java:733)
09-01 07:38:42.663: E/AndroidRuntime(16923): at android.os.Handler.dispatchMessage(Handler.java:95)
09-01 07:38:42.663: E/AndroidRuntime(16923): at android.os.Looper.loop(Looper.java:157)
09-01 07:38:42.663: E/AndroidRuntime(16923): at android.app.ActivityThread.main(ActivityThread.java:5335)
09-01 07:38:42.663: E/AndroidRuntime(16923): at java.lang.reflect.Method.invokeNative(Native Method)
09-01 07:38:42.663: E/AndroidRuntime(16923): at java.lang.reflect.Method.invoke(Method.java:515)
09-01 07:38:42.663: E/AndroidRuntime(16923): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1265)
09-01 07:38:42.663: E/AndroidRuntime(16923): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1081)
09-01 07:38:42.663: E/AndroidRuntime(16923): at dalvik.system.NativeStart.main(Native Method)
09-01 07:38:42.663: E/AndroidRuntime(16923): Caused by: java.lang.reflect.InvocationTargetException
09-01 07:38:42.663: E/AndroidRuntime(16923): at java.lang.reflect.Method.invokeNative(Native Method)
09-01 07:38:42.663: E/AndroidRuntime(16923): at java.lang.reflect.Method.invoke(Method.java:515)
09-01 07:38:42.663: E/AndroidRuntime(16923): at android.view.View$1.onClick(View.java:3964)
09-01 07:38:42.663: E/AndroidRuntime(16923): ... 11 more
09-01 07:38:42.663: E/AndroidRuntime(16923): Caused by: java.lang.ArrayIndexOutOfBoundsException: length=5; index=6
09-01 07:38:42.663: E/AndroidRuntime(16923): at com.example.btn.MainActivity.yolo(MainActivity.java:28)
09-01 07:38:42.663: E/AndroidRuntime(16923): ... 14 more
09-01 07:38:43.783: V/MediaPlayer(16923): message received msg=2, ext1=0, ext2=0
09-01 07:38:43.783: V/MediaPlayer(16923): playback complete
答案 0 :(得分：1)
创建后立即启动mp11。所以它会立即开始播放，这几乎是mp1正在播放的瞬间。如果您希望它被延迟，请在您的runnable中触发它。
Additinal：
查看logcat行Caused by: java.lang.ArrayIndexOutOfBoundsException: length=5; index=6
你已经用5个项目设置了你的声音[]，但是你正在生成一个0到7之间的随机数，所以你最终得到的数字超出了数组的范围。您应该将随机数生成更改为0到4之间。更灵活的方法是使用数组的长度：
Random r = new Random();
int index = r.nextInt(sounds.length - 1);
答案 1 :(得分：1)
1-2分钟后，按下按钮，我发现没有了 声音来了。你能告诉我怎么解决这个问题吗？
您对我的第一个答案的评论（顺便提一下，我非常肯定地回答了您的前两个问题），现在实际上是在询问一个全新的问题。这就是我在新答案中对这个新问题做出回应的原因。
首先，MediaPlayers占用系统资源。创建它们的整个负载通常是一个坏主意。特别是如果你在完成它们之后不进行清理（参见Releasing the MediaPlayer）。您描述的问题是，在使用您的应用程序1-2分钟后声音停止播放，这是系统资源耗尽的典型问题。
以下是使用MediaPlayer的资源安全模式：
MediaPlayer mediaPlayer;
...
public void btnOnClick(View view) {
// Setup the MediaPlayer with a resource
mediaPlayer = MediaPlayer.create(getContext(), R.raw.sound);
// Set a callback to listen for when the sound finishes playing
mediaPlayer.setOnCompletionListener(new MediaPlayer.OnCompletionListener() {
@Override
public void onCompletion(MediaPlayer mp) {
// The sound has finished playing so release the resources being used by the MediaPlayer
mediaPlayer.release();
mediaPlayer = null;
}
}
// Start playback
mediaPlayer.start();
}
顺便说一下，如果这是用于游戏或音板之类的东西，你的声音是短片的集合，你可能要考虑使用SoundPool而不是MediaPlayer。快速google for＆＃34; android SoundPool教程＆＃34;会出现像for example this one这样的大量内容。