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好的，我快到了。我收到了通知，但想打开应用程序并在您单击通知时在我拥有的 web 视图中加载一个 URL。我拥有的代码如下。当我单击通知时，它会打开 webview 活动，但随后会崩溃并且不会加载页面。

这是我的通知

private void sendGCMIntent(final Context theContext, Intent theMsg) 
    {   
        int icon = R.drawable.noti_msg, count;
        long when = Calendar.getInstance().getTimeInMillis();

        String msg = theMsg.getStringExtra("message");
        String url = theMsg.getStringExtra("photo");
        count = Integer.parseInt(theMsg.getStringExtra("count"));
        Bitmap photo = getBitmapFromURL(url);
        String nameEncode = theMsg.getStringExtra("name");

        String theMessage = Html.fromHtml(msg).toString().replace("\\", "");
        String name = Html.fromHtml(nameEncode).toString();

        String title = theContext.getString(R.string.app_name);
        Uri soundUri = Uri.parse("android.resource://" + getPackageName() + "/" + R.raw.msg);

        long[] vibraPattern = { 0, 500, 250, 500 };

        Intent notificationIntent = new Intent(theContext,MainActivity.class);
        notificationIntent.setData(Uri.parse("content://"+when));

        notificationIntent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP | Intent.FLAG_ACTIVITY_SINGLE_TOP);
        notificationIntent.addCategory("android.intent.category.LAUNCHER");
        PendingIntent contentIntent = PendingIntent.getActivity(theContext, 0, notificationIntent, PendingIntent.FLAG_CANCEL_CURRENT);

        NotificationManager notificationManager = (NotificationManager) theContext.getSystemService(Context.NOTIFICATION_SERVICE);

        NotificationCompat.Builder notification = new NotificationCompat.Builder(theContext);

        notification.setContentTitle(title);
        notification.setContentText("New message from: "+ name);
        notification.setSubText(theMessage);
        notification.setContentIntent(contentIntent);
        notification.setTicker("New message");
        notification.setNumber(count);
        notification.setSmallIcon(icon);
        notification.setLargeIcon(photo);
        notification.setAutoCancel(true);
        notification.setSound(soundUri);
        notification.setVibrate(vibraPattern);
        notification.setWhen(when);

        Notification notifies = notification.build();

        notificationManager.notify((int)when, notifies);    
    }

在我的 MainActivity 我有这个

  @Override
    protected void onNewIntent(Intent intent) {
        super.onNewIntent(intent);
        if(intent.getStringExtra("type").equals("message"))
        {
           String mUrl = intent.getStringExtra("mid");
           webView.loadUrl(mUrl);
        }
    }

这是日志错误

04-15 07:33:41.061: E/AndroidRuntime(19851): FATAL EXCEPTION: main
04-15 07:33:41.061: E/AndroidRuntime(19851): java.lang.NullPointerException
04-15 07:33:41.061: E/AndroidRuntime(19851):    at me.site.test.MainActivity.onNewIntent(MainActivity.java:230)
04-15 07:33:41.061: E/AndroidRuntime(19851):    at android.app.Instrumentation.callActivityOnNewIntent(Instrumentation.java:1168)
04-15 07:33:41.061: E/AndroidRuntime(19851):    at android.app.ActivityThread.deliverNewIntents(ActivityThread.java:2181)
04-15 07:33:41.061: E/AndroidRuntime(19851):    at android.app.ActivityThread.performNewIntents(ActivityThread.java:2194)
04-15 07:33:41.061: E/AndroidRuntime(19851):    at android.app.ActivityThread.handleNewIntent(ActivityThread.java:2203)
04-15 07:33:41.061: E/AndroidRuntime(19851):    at android.app.ActivityThread.access$1500(ActivityThread.java:139)
04-15 07:33:41.061: E/AndroidRuntime(19851):    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1295)
04-15 07:33:41.061: E/AndroidRuntime(19851):    at android.os.Handler.dispatchMessage(Handler.java:99)
04-15 07:33:41.061: E/AndroidRuntime(19851):    at android.os.Looper.loop(Looper.java:137)
04-15 07:33:41.061: E/AndroidRuntime(19851):    at android.app.ActivityThread.main(ActivityThread.java:4918)
04-15 07:33:41.061: E/AndroidRuntime(19851):    at java.lang.reflect.Method.invokeNative(Native Method)
04-15 07:33:41.061: E/AndroidRuntime(19851):    at java.lang.reflect.Method.invoke(Method.java:511)
04-15 07:33:41.061: E/AndroidRuntime(19851):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1004)
04-15 07:33:41.061: E/AndroidRuntime(19851):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:771)
04-15 07:33:41.061: E/AndroidRuntime(19851):    at dalvik.system.NativeStart.main(Native Method)
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1 回答 1

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您的问题是您正在从您的意图中读取 String Extra，但您从未在notificationIntent.

我怀疑您在NullPointerException以下行中得到了一个：

if(intent.getStringExtra("type").equals("message"))

你真的需要打电话：

notificationIntent.putExtra( "type", "message" );
notificationIntent.putExtra( "mid", /* some String value */ );

在你的sendGCMIntent方法中。

于 2013-04-15T11:24:10.567 回答