从onReceive（）方法获取意图

Question

我想将onReceive()方法的意图发送到onResume()方法。

在我看来，可以从onReceive()发送到onResume()。

但是，在onResume()方法中。

Intent intent_Main = getIntent();
String getmsg = intent_Main.getExtras().getString("states");
textView.setText("Broadcast message received:"+getmsg);

如果我使用intent_Main.getExtras().getString("states");语句，则应用程序已停止。

有什么问题？

我认为BroadcastReceiver或传输意图没有问题。

logcat的，

11-11 02:13:39.268 2666-2666/com.example.wonheelee.simplereceiver E/AndroidRuntime: FATAL EXCEPTION: main
                Process: com.example.wonheelee.simplereceiver, PID: 2666
                java.lang.RuntimeException: Unable to resume activity {com.example.wonheelee.simplereceiver/com.example.wonheelee.simplereceiver.MainActivity}: java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.String android.os.Bundle.getString(java.lang.String)' on a null object reference
                    at android.app.ActivityThread.performResumeActivity(ActivityThread.java:3103)
                    at android.app.ActivityThread.handleResumeActivity(ActivityThread.java:3134)
                    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2481)
                    at android.app.ActivityThread.-wrap11(ActivityThread.java)
                    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1344)
                    at android.os.Handler.dispatchMessage(Handler.java:102)
                    at android.os.Looper.loop(Looper.java:148)
                    at android.app.ActivityThread.main(ActivityThread.java:5417)
                    at java.lang.reflect.Method.invoke(Native Method)
                    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
                    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
                 Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.String android.os.Bundle.getString(java.lang.String)' on a null object reference
                    at com.example.wonheelee.simplereceiver.MainActivity.onResume(MainActivity.java:45)
                    at android.app.Instrumentation.callActivityOnResume(Instrumentation.java:1258)
                    at android.app.Activity.performResume(Activity.java:6312)
                    at android.app.ActivityThread.performResumeActivity(ActivityThread.java:3092)
                    at android.app.ActivityThread.handleResumeActivity(ActivityThread.java:3134) 
                    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2481) 
                    at android.app.ActivityThread.-wrap11(ActivityThread.java) 
                    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1344) 
                    at android.os.Handler.dispatchMessage(Handler.java:102) 
                    at android.os.Looper.loop(Looper.java:148) 
                    at android.app.ActivityThread.main(ActivityThread.java:5417) 
                    at java.lang.reflect.Method.invoke(Native Method) 
                    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726) 
                    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)