3rd Lesson 1th-Basic Knowledge Android message processing mechanism

E:\Github\hello-world\APP_Addons_0001_Message\app\src\main\java\com\thisway\app_addons_0001_message\ Mainactivity.java

Package Com.thisway.app_addons_0001_message;import Android.os.handler;import android.os.looper;import Android.os.message;import Android.support.v7.app.appcompatactivity;import Android.os.bundle;import Android.view.menu;import Android.view.menuitem;import Android.widget.button;import Android.view.View;import Android.util.log;import Android.os.HandlerThread; Public classMainactivity extends Appcompatactivity {PrivateButton Mbutton; PrivateFinal String tag="messagetest"; Private intButtoncount =0; PrivateThread MyThread; PrivateMyThread myThread2; PrivateHandler Mhandler; PrivateHandler MHandler3; Private intMmessagecount =0; PrivateHandlerthread myThread3; classMyrunnable implements Runnable { Public voidrun () {intCount =0;  for (;;) {LOG.D (TAG,"MyThread"+count); Count++; Try{Thread.Sleep ( the); } Catch(interruptedexception e) {e.printstacktrace (); }            }        }    }    classMyThread extends Thread {PrivateLooper Mlooper; @Override Public voidrun () {super.run ();            Looper.prepare (); Synchronized ( This) {Mlooper=Looper.mylooper ();            Notifyall ();        } looper.loop (); }         PublicLooper Getlooper () {if(!isAlive ()) {                return NULL; }            //If The thread has been started, wait until the Looper have been created.Synchronized ( This) {                 while(IsAlive () && Mlooper = =NULL) {                    Try{wait (); } Catch(Interruptedexception e) {}}} returnMlooper; }} @Overrideprotected voidonCreate (Bundle savedinstancestate) {super.oncreate (savedinstancestate);        Setcontentview (R.layout.activity_main); Mbutton=(Button) Findviewbyid (R.id.button); Mbutton.setonclicklistener (NewView.onclicklistener () { Public voidOnClick (View v) {//Perform Action on ClickLOG.D (TAG,"Send Message"+buttoncount); Buttoncount++; Message msg=NewMessage ();                Mhandler.sendmessage (msg); Mhandler3.post (NewRunnable () {@Override Public voidrun () {LOG.D (TAG,"get Message for Thread3"+mmessagecount); Mmessagecount++;            }                });        }        }); MyThread=NewThread (NewMyrunnable (),"Messagetestthread");        Mythread.start (); MyThread2=NewMyThread ();        Mythread2.start (); Mhandler=NewHandler (Mythread2.getlooper (),NewHandler.callback () {@Override Publicboolean handlemessage (Message msg) {LOG.D (TAG,"Get Message"+mmessagecount); Mmessagecount++; return false;        }        }); MyThread3=NewHandlerthread ("MessageTestThread3");        Mythread3.start (); MHandler3=NewHandler (Mythread3.getlooper ()); } @Override Publicboolean Oncreateoptionsmenu (Menu menu) {//inflate the menu; This adds items to the action bar if it is present.getmenuinflater (). Inflate (R.menu.menu_main, menu); return true; } @Override Publicboolean onoptionsitemselected (MenuItem item) {//Handle Action Bar item clicks here. The Action Bar would//automatically handle clicks on the Home/up button, so long//As you specify a the parent activity in Androidmanifest.xml.        intID =Item.getitemid (); //noinspection simplifiableifstatement        if(id = =r.id.action_settings) {            return true; }        returnsuper.onoptionsitemselected (item); }}

E:\Github\hello-world\APP_Addons_0001_Message\app\src\main\res\layout\activity_main.xml

<linearlayout xmlns:android="http://schemas.android.com/apk/res/android"Xmlns:tools="Http://schemas.android.com/tools"Android:layout_width="match_parent"Android:layout_height="match_parent"android:paddingleft="@dimen/activity_horizontal_margin"Android:paddingright="@dimen/activity_horizontal_margin"Android:paddingtop="@dimen/activity_vertical_margin"Android:paddingbottom="@dimen/activity_vertical_margin"tools:context=". Mainactivity"android:orientation="Vertical"> <Button android:layout_width="fill_parent"Android:layout_height="wrap_content"Android:text="Send Message"Android:id="@+id/button"android:layout_gravity="Center_horizontal"/></linearlayout>

3rd Lesson 1th-Basic Knowledge Android message processing mechanism