Android 媒体播放器启动/停止-崩溃

我想在按下ImageButton时执行此操作，声音开始，下一次单击后停止

开始和停止工作。但是当你按下后退按钮时，程序崩溃了

问题在哪里

代码：

错误：

当我单击开始/停止开始/停止10x:D时

3-02 14:21:05.395: W/MediaPlayer(233): info/warning (1, 44)
    03-02 14:21:05.494: I/MediaPlayer(233): Info (1,44)
    03-02 14:22:28.085: E/MediaPlayer(233): pause called in state 128
    03-02 14:22:28.085: E/MediaPlayer(233): error (-38, 0)
    03-02 14:22:28.085: E/MediaPlayer(233): Error (-38,0)
    03-02 14:22:33.455: E/MediaPlayer(233): start called in state 0
    03-02 14:22:33.455: E/MediaPlayer(233): error (-38, 0)
    03-02 14:22:33.455: E/MediaPlayer(233): Error (-38,0)
    03-02 14:22:35.964: W/KeyCharacterMap(233): No keyboard for id 0
    03-02 14:22:35.964: W/KeyCharacterMap(233): Using default keymap: /system/usr/keychars/qwerty.kcm.bin
    03-02 14:22:36.584: E/MediaPlayer(233): pause called in state 0
    03-02 14:22:36.584: E/MediaPlayer(233): error (-38, 0)
    03-02 14:22:36.584: E/MediaPlayer(233): stop called in state 0
    03-02 14:22:36.584: E/MediaPlayer(233): error (-38, 0)

当我按下后退按钮时

        03-02 14:22:36.635: D/AndroidRuntime(233): Shutting down VM
        03-02 14:22:36.635: W/dalvikvm(233): threadid=3: thread exiting with uncaught exception (group=0x4001b188)
        03-02 14:22:36.635: E/AndroidRuntime(233): Uncaught handler: thread main exiting due to uncaught exception
        03-02 14:22:36.655: E/AndroidRuntime(233): android.app.SuperNotCalledException: Activity {com.troll.sound/com.troll.sound.Sound} did not call through to super.onDestroy()
        03-02 14:22:36.655: E/AndroidRuntime(233):  at android.app.ActivityThread.performDestroyActivity(ActivityThread.java:3458)
        03-02 14:22:36.655: E/AndroidRuntime(233):  at android.app.ActivityThread.handleDestroyActivity(ActivityThread.java:3487)
        03-02 14:22:36.655: E/AndroidRuntime(233):  at android.app.ActivityThread.access$2800(ActivityThread.java:119)
        03-02 14:22:36.655: E/AndroidRuntime(233):  at 

android.app.ActivityThread$H.handleMessage(ActivityThread.java:1896)
    03-02 14:22:36.655: E/AndroidRuntime(233):  at android.os.Handler.dispatchMessage(Handler.java:99)
    03-02 14:22:36.655: E/AndroidRuntime(233):  at android.os.Looper.loop(Looper.java:123)
    03-02 14:22:36.655: E/AndroidRuntime(233):  at android.app.ActivityThread.main(ActivityThread.java:4363)
    03-02 14:22:36.655: E/AndroidRuntime(233):  at java.lang.reflect.Method.invokeNative(Native Method)
    03-02 14:22:36.655: E/AndroidRuntime(233):  at java.lang.reflect.Method.invoke(Method.java:521)
    03-02 14:22:36.655: E/AndroidRuntime(233):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:860)
    03-02 14:22:36.655: E/AndroidRuntime(233):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618)
    03-02 14:22:36.655: E/AndroidRuntime(233):  at dalvik.system.NativeStart.main(Native Method)
    03-02 14:22:36.685: I/dalvikvm(233): threadid=7: reacting to signal 3
    03-02 14:22:36.714: E/dalvikvm(233): Unable to open stack trace file '/data/anr/traces.txt': Permission denied

---

请在您的

onDestroy（）

实现中调用

super.onDestroy（）

。

我们现在如何判断是什么导致了您的崩溃？请提供日志..“未调用super.ondestory（）”存在一个问题。

        03-02 14:22:36.635: D/AndroidRuntime(233): Shutting down VM
        03-02 14:22:36.635: W/dalvikvm(233): threadid=3: thread exiting with uncaught exception (group=0x4001b188)
        03-02 14:22:36.635: E/AndroidRuntime(233): Uncaught handler: thread main exiting due to uncaught exception
        03-02 14:22:36.655: E/AndroidRuntime(233): android.app.SuperNotCalledException: Activity {com.troll.sound/com.troll.sound.Sound} did not call through to super.onDestroy()
        03-02 14:22:36.655: E/AndroidRuntime(233):  at android.app.ActivityThread.performDestroyActivity(ActivityThread.java:3458)
        03-02 14:22:36.655: E/AndroidRuntime(233):  at android.app.ActivityThread.handleDestroyActivity(ActivityThread.java:3487)
        03-02 14:22:36.655: E/AndroidRuntime(233):  at android.app.ActivityThread.access$2800(ActivityThread.java:119)
        03-02 14:22:36.655: E/AndroidRuntime(233):  at 

android.app.ActivityThread$H.handleMessage(ActivityThread.java:1896)
    03-02 14:22:36.655: E/AndroidRuntime(233):  at android.os.Handler.dispatchMessage(Handler.java:99)
    03-02 14:22:36.655: E/AndroidRuntime(233):  at android.os.Looper.loop(Looper.java:123)
    03-02 14:22:36.655: E/AndroidRuntime(233):  at android.app.ActivityThread.main(ActivityThread.java:4363)
    03-02 14:22:36.655: E/AndroidRuntime(233):  at java.lang.reflect.Method.invokeNative(Native Method)
    03-02 14:22:36.655: E/AndroidRuntime(233):  at java.lang.reflect.Method.invoke(Method.java:521)
    03-02 14:22:36.655: E/AndroidRuntime(233):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:860)
    03-02 14:22:36.655: E/AndroidRuntime(233):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618)
    03-02 14:22:36.655: E/AndroidRuntime(233):  at dalvik.system.NativeStart.main(Native Method)
    03-02 14:22:36.685: I/dalvikvm(233): threadid=7: reacting to signal 3
    03-02 14:22:36.714: E/dalvikvm(233): Unable to open stack trace file '/data/anr/traces.txt': Permission denied

03-02 14:22:36.655: E/AndroidRuntime(233): android.app.SuperNotCalledException: Activity {com.troll.sound/com.troll.sound.Sound} did not call through to super.onDestroy()