The two ways Android button buttons are implemented

First set of methods:

Res/laoyout/activity_main.xml Code:

<Relativelayoutxmlns: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:paddingbottom= "@dimen/activity_vertical_margin"Android:paddingleft= "@dimen/activity_horizontal_margin"Android:paddingright= "@dimen/activity_horizontal_margin"Android:paddingtop= "@dimen/activity_vertical_margin"Tools:context=". Mainactivity " >    <ButtonAndroid:id= "@+id/button"Android:layout_width= "Wrap_content"Android:layout_height= "Wrap_content"Android:layout_below= "@+id/textview1"Android:layout_margintop= "51DP"Android:layout_torightof= "@+id/textview1"Android:text= "button" /></Relativelayout>

Mainactivity.java Code:

 PackageCom.example.testbutton;Importandroid.app.Activity;ImportAndroid.os.Bundle;ImportAndroid.view.View;ImportAndroid.view.View.OnClickListener;ImportAndroid.widget.Button;ImportAndroid.widget.Toast; Public classMainactivityextendsActivity {@Overrideprotected voidonCreate (Bundle savedinstancestate) {Super. OnCreate (savedinstancestate);        Setcontentview (R.layout.activity_main); FinalButton BT =(Button) Findviewbyid (R.id.button); Bt.setonclicklistener (NewOnclicklistener () {@Override Public voidOnClick (View arg0) {//TODO auto-generated Method StubToast.maketext (mainactivity. This, "Pro, you clicked the button up", 1000). Show ();           }              }) ; }}

The second set of methods:

We can set the OnClick event in the button property in the layout file.

<Relativelayoutxmlns: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:paddingbottom= "@dimen/activity_vertical_margin"Android:paddingleft= "@dimen/activity_horizontal_margin"Android:paddingright= "@dimen/activity_horizontal_margin"Android:paddingtop= "@dimen/activity_vertical_margin"Tools:context=". Mainactivity " >    <ButtonAndroid:id= "@+id/button"Android:layout_width= "Wrap_content"Android:layout_height= "Wrap_content"Android:layout_below= "@+id/textview1"Android:layout_margintop= "51DP"Android:layout_torightof= "@+id/textview1" android:onclick= "Clickmyself" Android:text= "button" /></Relativelayout>

Mainactivity.java Code:

 PackageCom.example.testbutton;Importandroid.app.Activity;ImportAndroid.os.Bundle;ImportAndroid.view.View;ImportAndroid.widget.Button;ImportAndroid.widget.Toast; Public classMainactivityextendsActivity {@Overrideprotected voidonCreate (Bundle savedinstancestate) {Super. OnCreate (savedinstancestate);        Setcontentview (R.layout.activity_main); FinalButton BT =(Button) Findviewbyid (R.id.button); }    Public   void  clickmyself (view view) {Toast.maketext (mainactivity. This, "button was clicked",  ). Show (); }}

The two ways Android button buttons are implemented