How to use the android button

1. 2. Package Com.hangsheng.button;
   6. import android.app.Activity;
   8. import Android.os.Bundle;
   10. import Android.view.View;
   12. import Android.widget.Button;
   16. Public class ex07_widgetbuttonactivity extends Activity {
   18. /** called when the activity is first created. * /
   20. @Override
   22. Public void onCreate (Bundle savedinstancestate) {
   24. Super. OnCreate (savedinstancestate);
   26. Setcontentview (R.layout.main); //Associated layout template file Main.xml
   28. Find_and_modify_button (); //Call member function Find_and_modity_button
   30. }
   32. private void Find_and_modify_button () {
   34. Button button = (button) Findviewbyid (R.id.button); //Instantiate a button object with a resource with ID as button in the resource
   36. Button.setonclicklistener (Button_listener); //Set the listener for the object button
   40. };
   42. Private button.onclicklistener button_listener =new Button.onclicklistener () { // member button Listener Object
   44. @Override
   46. Public void OnClick (View v) { //button event
   48. //TODO auto-generated method stub
   50. Settitle ("button was clicked");
   52. }
   54. };
   56. }

Layout template file Main.xml:

2. <? XML version="1.0" encoding="Utf-8" ?>
4. <linearlayout xmlns:android="http://schemas.android.com/apk/res/android"
6. android:layout_width="fill_parent"
8. android:layout_height="fill_parent"
10. android:orientation="vertical" >
14. <TextView
16. android:layout_width="fill_parent"
18. android:layout_height="wrap_content"
20. Android:text="@string/hello" />
24. <Button
26. android:id="@+id/button"
28. android:layout_width="wrap_content"
30. android:layout_height="wrap_content"
32. Android:text="This is button" />
36. </linearlayout>

How to use the android button