此处click21
是持续0秒的mp3
声音,我从click21.aiff
转换。但是当我运行它时,我收到nullpointexception
类型的错误错误
你能告诉我什么是问题吗?
MediaPlayer mp;
mp =MediaPlayer.create(this, R.drawable.click21);
mp.start();
错误日志
03-31 11:39:56.371: E/AndroidRuntime(811): FATAL EXCEPTION: main
03-31 11:39:56.371: E/AndroidRuntime(811): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.simba.silicon/com.simba.silicon.startscreen.CircleMenuScreen}: java.lang.NullPointerException
03-31 11:39:56.371: E/AndroidRuntime(811): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2211)
03-31 11:39:56.371: E/AndroidRuntime(811): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2261)
03-31 11:39:56.371: E/AndroidRuntime(811): at android.app.ActivityThread.access$600(ActivityThread.java:141)
03-31 11:39:56.371: E/AndroidRuntime(811): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1256)
03-31 11:39:56.371: E/AndroidRuntime(811): at android.os.Handler.dispatchMessage(Handler.java:99)
03-31 11:39:56.371: E/AndroidRuntime(811): at android.os.Looper.loop(Looper.java:137)
03-31 11:39:56.371: E/AndroidRuntime(811): at android.app.ActivityThread.main(ActivityThread.java:5103)
03-31 11:39:56.371: E/AndroidRuntime(811): at java.lang.reflect.Method.invokeNative(Native Method)
03-31 11:39:56.371: E/AndroidRuntime(811): at java.lang.reflect.Method.invoke(Method.java:525)
03-31 11:39:56.371: E/AndroidRuntime(811): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:737)
03-31 11:39:56.371: E/AndroidRuntime(811): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
03-31 11:39:56.371: E/AndroidRuntime(811): at dalvik.system.NativeStart.main(Native Method)
03-31 11:39:56.371: E/AndroidRuntime(811): Caused by: java.lang.NullPointerException
03-31 11:39:56.371: E/AndroidRuntime(811): at com.zippy.zippyapp.startscreen.CircleMenuScreen.onCreate(CircleMenuScreen.java:127)
03-31 11:39:56.371: E/AndroidRuntime(811): at android.app.Activity.performCreate(Activity.java:5133)
03-31 11:39:56.371: E/AndroidRuntime(811): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087)
03-31 11:39:56.371: E/AndroidRuntime(811): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2175)
03-31 11:39:56.371: E/AndroidRuntime(811): ... 11 more
答案 0 :(得分:0)
当然,您尝试为图像传递mp3文件。 您要做的是在res /文件夹中创建一个原始文件夹。
然后当您致电MediaPlayer时:
MediaPlayer md = MediaPlayer.create(context, R.raw.click21);
md.setOnPreparedListener(new OnPreparedListener() {
@Override
public void onPrepared(MediaPlayer mp) {
// TODO Auto-generated method stub
mp.start();
}
});
md.prepareAsync();