Android Handler runnable use instance (key is stop in internal run)

. java

1  PackageCom.example.mydemo;2 3 Importandroid.app.Activity;4 ImportAndroid.os.Bundle;5 ImportAndroid.os.Handler;6 ImportAndroid.os.Message;7 ImportAndroid.view.View;8 ImportAndroid.view.View.OnClickListener;9 ImportAndroid.widget.Button;Ten ImportAndroid.widget.TextView; One  A  Public classMainactivityextendsActivity { -     PrivateTextView Text_view =NULL; -     PrivateButton start =NULL; the     PrivateButton end =NULL; -     Private intCount = 0; -     //The first thing to do when using handler is to create a handler -Handler Handler =NewHandler (); +     //to handle multithreading with handler, you can use the Runnable interface, where the interface is defined first -     //The run function that runs the interface in a thread +Runnable Update_thread =NewRunnable () { A          Public voidrun () { at             //the thread prints "Updatethread ..." text each time it executes and wraps it -             //TextView's append function is similar to the append in Qt and does not cover the front -             //content, but the append in Qt is automatically wrapped in the default mode . -             //text_view.append ("\nupdatethread ..."); -Text_view.settext (String.valueof (count++)); -             //delay 1s and add thread to thread queue in             if(Count >= 5) { -                 //handler.removecallbacks (update_thread);//stop with this line, you need to send a message outside to stop. Don't understand?  toMessage message =NewMessage (); +Message.what = 1; - handlerstop.sendmessage (message); the             } *Handler.postdelayed (Update_thread, 1000); $ Panax Notoginseng         } -     }; the  + @Override A      Public voidonCreate (Bundle savedinstancestate) { the         Super. OnCreate (savedinstancestate); + Setcontentview (r.layout.activity_main); -  $Text_view =(TextView) Findviewbyid (R.id.text_view); $Start =(Button) Findviewbyid (R.id.start); -Start.setonclicklistener (NewStartclicklistener ()); -End =(Button) Findviewbyid (r.id.end); theEnd.setonclicklistener (NewEndclicklistener ()); - Handler.post (update_thread);Wuyi     } the  -     Private classStartclicklistenerImplementsOnclicklistener { Wu          Public voidOnClick (View v) { -             //TODO auto-generated Method Stub About             //to send the thread interface immediately to the thread queue $ Handler.post (update_thread); -         } -     } -  A     Private classEndclicklistenerImplementsOnclicklistener { +          Public voidOnClick (View v) { the             //TODO auto-generated Method Stub -             //to remove an interface from the thread queue $Count = 0; the handler.removecallbacks (update_thread); the         } the     } the  -     FinalHandler Handlerstop =NewHandler () { in          Public voidhandlemessage (Message msg) { the             Switch(msg.what) { the              Case1: AboutCount = 0; the handler.removecallbacks (update_thread); the                  Break; the             } +             Super. Handlemessage (msg); -         } the Bayi     }; the}

. xml

1<linearlayout xmlns:android= "Http://schemas.android.com/apk/res/android"2Xmlns:tools= "Http://schemas.android.com/tools"3Android:layout_width= "Match_parent"4android:layout_height= "Match_parent"5android:orientation= "Vertical" >6 7<TextView8Android:id= "@+id/text_view"9Android:layout_width= "Fill_parent"Tenandroid:layout_height= "200dip" Oneandroid:text= "@string/hello_world" ATools:context= ". Mainactivity "/> -  -<Button theAndroid:id= "@+id/start" -Android:layout_width= "Fill_parent" -android:layout_height= "Wrap_content" -android:text= "Start"/> +  -<Button +Android:id= "@+id/end" AAndroid:layout_width= "Fill_parent" atandroid:layout_height= "Wrap_content" -android:text= "End"/> -  -</LinearLayout>

Android Handler runnable use instance (key is stop in internal run)