Question

如何从Main_Activity课程开始BroadcastReceiver？我进行了搜索，发现了这段代码，但我不知道在哪里放我的包名。

 Intent intent=new Intent();
 intent.setClassName("com.package.my", "com.package.my.abc");
 intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
 context.startActivity(intent);

我的包名是com.example.tes。

记录：

01-15 08:49:23.800: E/AndroidRuntime(1326): FATAL EXCEPTION: main

01-15 08:49:23.800: E/AndroidRuntime(1326): Process: com.example.tes, PID: 1326

01-15 08:49:23.800: E/AndroidRuntime(1326): java.lang.RuntimeException: Unable to start receiver com.example.tes.SMSReceiver: android.util.AndroidRuntimeException: Calling startActivity() from outside of an Activity  context requires the FLAG_ACTIVITY_NEW_TASK flag. Is this really what you want?

01-15 08:49:23.800: E/AndroidRuntime(1326):     at android.app.ActivityThread.handleReceiver(ActivityThread.java:2426)

01-15 08:49:23.800: E/AndroidRuntime(1326):     at android.app.ActivityThread.access$1700(ActivityThread.java:135)

01-15 08:49:23.800: E/AndroidRuntime(1326):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1272)

01-15 08:49:23.800: E/AndroidRuntime(1326):     at android.os.Handler.dispatchMessage(Handler.java:102)

01-15 08:49:23.800: E/AndroidRuntime(1326):     at android.os.Looper.loop(Looper.java:136)

01-15 08:49:23.800: E/AndroidRuntime(1326):     at android.app.ActivityThread.main(ActivityThread.java:5017)

01-15 08:49:23.800: E/AndroidRuntime(1326):     at java.lang.reflect.Method.invokeNative(Native Method)

01-15 08:49:23.800: E/AndroidRuntime(1326):     at java.lang.reflect.Method.invoke(Method.java:515)

01-15 08:49:23.800: E/AndroidRuntime(1326):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:779)

01-15 08:49:23.800: E/AndroidRuntime(1326):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:595)

01-15 08:49:23.800: E/AndroidRuntime(1326):     at dalvik.system.NativeStart.main(Native Method)

01-15 08:49:23.800: E/AndroidRuntime(1326): Caused by: android.util.AndroidRuntimeException: Calling startActivity() from outside of an Activity  context requires the FLAG_ACTIVITY_NEW_TASK flag. Is this really what you want?

01-15 08:49:23.800: E/AndroidRuntime(1326):     at android.app.ContextImpl.startActivity(ContextImpl.java:1034)

01-15 08:49:23.800: E/AndroidRuntime(1326):     at android.app.ContextImpl.startActivity(ContextImpl.java:1021)

01-15 08:49:23.800: E/AndroidRuntime(1326):     at android.content.ContextWrapper.startActivity(ContextWrapper.java:311)

01-15 08:49:23.800: E/AndroidRuntime(1326):     at android.content.ContextWrapper.startActivity(ContextWrapper.java:311)

01-15 08:49:23.800: E/AndroidRuntime(1326):     at com.example.tes.SMSReceiver.onReceive(SMSReceiver.java:47)

01-15 08:49:23.800: E/AndroidRuntime(1326):     at android.app.ActivityThread.handleReceiver(ActivityThread.java:2419)

01-15 08:49:23.800: E/AndroidRuntime(1326):     ... 10 more

Answer 1

为什么不使用app context启动它：

  Intent intent = new Intent (context, MainActivity.class);
  intent.setFlags (Intent.FLAG_ACTIVITY_NEW_TASK); 
  context.startActivity (intent);

如何在BroadcasrReceiver类中启动mainactivity？

1 个答案: