NullPointerExeption而開始新的活動

我的最後一個話題：How to finish activity in broadcastreceiver onCallEnded()NullPointerExeption而開始新的活動

試着繼續監聽器IncomingCallActivity，所以編輯IcomingCallReceiver到：

public class IncomingCallReceiver extends BroadcastReceiver { 

@Override 
public void onReceive(Context context, Intent intent) { 


     Intent i = new Intent(context, IncomingCallActivity.class); 
     i.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK); 
     context.startActivity(i); }

現在越來越NullPointerExeption開始新的活動時......任何想法，爲什麼？

logcat的

FATAL EXCEPTION: main 
java.lang.RuntimeException: Unable to start activity 
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1651) 
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1667) 
at android.app.ActivityThread.access$1500(ActivityThread.java:117) 
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:935) 
at android.os.Handler.dispatchMessage(Handler.java:99) 
at android.os.Looper.loop(Looper.java:130) 
at android.app.ActivityThread.main(ActivityThread.java:3687) 
at java.lang.reflect.Method.invokeNative(Native Method) 
at java.lang.reflect.Method.invoke(Method.java:507) 
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:867) 
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:625) 
at dalvik.system.NativeStart.main(Native Method) 
Caused by: java.lang.NullPointerException 
at IncomingCallActivity.onCreate(IncomingCallActivity.java:34) 
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047) 
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1615) 
    ... 11 more

有了這個代碼：

公共類IncomingCallReceiver擴展廣播接收器{

@Override 
public void onReceive(Context context, Intent intent) { 
    SipAudioCall incomingCall = null; 
    try { 

     SipAudioCall.Listener listener = new SipAudioCall.Listener() { 

      ... 

      @Override 
      public void onCallEnded(SipAudioCall call) { 

      // IncomingCallActivity.finish(); 

      } 
     }; 

     Main mainActivity = (Main) context; 
     incomingCall = mainActivity.manager.takeAudioCall(intent, listener); 
     mainActivity.call = incomingCall; 

     Intent i = new Intent(context, IncomingCallActivity.class); 
     i.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK); 
     context.startActivity(i);

活動盯着不困難，但我需要移動偵聽器，以IncomingCallActivity

來源

2013-01-03 lizaczek

你可以請更新你所得到的logcat錯誤信息。 – pyus13

發佈您的IncomingCallActivity活動代碼 –

在第34行的IncomingCallActivity.java中存在問題 - 顯示它 – Viacheslav

Caused by: java.lang.NullPointerException 
at IncomingCallActivity.onCreate(IncomingCallActivity.java:34)

查看onCreate（）方法中的IncomingCallActivity中的34行。

祝你好運！

來源

2013-01-03 19:16:22

看這裏：

在IncomingCallActivity活動中檢查第34行並粘貼IncomingCallActivity活動代碼。

來源

2013-01-03 19:03:08

NullPointerExeption而開始新的活動

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