Getting Started with Android 003 (click events)

There are four ways to implement a click event.

1. Inner class Implementation method

1.0

 Packagecn.rfvip.clickevent;Importandroid.app.Activity;ImportAndroid.os.Bundle;ImportAndroid.view.View;ImportAndroid.view.View.OnClickListener;ImportAndroid.widget.Button; Public classMainactivityextendsActivity {@Overrideprotected voidonCreate (Bundle savedinstancestate) {Super. OnCreate (savedinstancestate);                  Setcontentview (R.layout.activity_main); //First button click Inner class implementationButton bt1=(Button) Findviewbyid (R.ID.BTN1); Bt1.setonclicklistener (NewOnclicklistener () {@Override Public voidOnClick (View v) {//TODO Auto-generated method stubsSYSTEM.OUT.PRINTLN ("first button click (Mode one: inner class implementation)");            }        }); }    }

1.1. One of the variants of the wording

 Packagecn.rfvip.clickevent;Importandroid.app.Activity;ImportAndroid.os.Bundle;ImportAndroid.view.View;ImportAndroid.view.View.OnClickListener;ImportAndroid.widget.Button; Public classMainactivityextendsActivity {@Overrideprotected voidonCreate (Bundle savedinstancestate) {Super. OnCreate (savedinstancestate);                  Setcontentview (R.layout.activity_main); //First button click Inner class implementationButton bt1=(Button) Findviewbyid (R.ID.BTN1); Bt1.setonclicklistener (NewMybtn1 ()); }     classMybtn1Implementsonclicklistener{@Override Public voidOnClick (View v) {//TODO Auto-generated method stubsSYSTEM.OUT.PRINTLN ("first button click (Mode one: internal class variants)"); }}   }

2. This implementation

 Packagecn.rfvip.clickevent;Importandroid.app.Activity;ImportAndroid.os.Bundle;ImportAndroid.view.View;ImportAndroid.view.View.OnClickListener;ImportAndroid.widget.Button; Public classMainactivityextendsActivityImplementsonclicklistener{@Overrideprotected voidonCreate (Bundle savedinstancestate) {Super. OnCreate (savedinstancestate);                  Setcontentview (R.layout.activity_main); //The second button clicks the Inner class implementationButton bt2=(Button) Findviewbyid (R.ID.BTN2); Bt2.setonclicklistener ( This); } @Override Public voidOnClick (View v) {//TODO Auto-generated method stubsSystem.out.println ("Second button click, Way two: This implementation implements Onclicklistener"); }    }

3, no ID implementation

android:onclick= "Getmeth" in Activity_main.xml

   < Button                Android:layout_width = "Wrap_content"         android:layout_height= "Wrap_content"        android:text= "Click 5 No ID implementation"         android:onclick= "Getmeth"          />

In the Mainactivity.java

 Public void Getmeth (View v)    {        System.out.println ("not Id implements  ");            }

Getting Started with Android 003 (click events)