Getting Started with Android Development (iv) Send notification 4.1 toast notification

Toast notifications are the simplest message notifications in Android. Next show how to use the toast notification.

1. A new project, Toast.

2. Code in the Main.xml.

<relativelayout 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 " >     
         
    <button     
        android:id= "@+id/button" 
        android:layout_width= "wrap_content" 
        android:layout_ height= "Wrap_content" 
        android:layout_centerhorizontal= "true" 
        android:layout_centervertical= "true" 
        android:padding= "@dimen/padding_medium" 
        android:text= "@string/hello_world"/>     
         
</ Relativelayout>

3. Code in the Mainactivity.java.

public class Mainactivity extends activity {     
    Private button button;     
         
    @Override public 
    void OnCreate (Bundle savedinstancestate) {     
        super.oncreate (savedinstancestate);     
        Setcontentview (r.layout.main);     
        Button = (button) Findviewbyid (R.id.button);     
        Button.setonclicklistener (New Onclicklistener () {     
         
            @Override public 
            void OnClick (View v) {     
                Toast.maketext (Getbasecontext (), "Hi, I am a Toast",     
                        toast.length_short). Show ();}}     
         
}

4. Press F11 to debug on the simulator. Click on the Center button, it will pop up the toast notice.

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