Button基础

一、程序执行效果

• 当按下OK按钮时，标题栏显示: this is OK button
• 当按下Exit按钮时，程序退出

二、代码

1. ex02.java

public class ex02 extends Activity {private Button mBtnOK;private Button mBtnExit; /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); mBtnOK = (Button)findViewById(R.id.Button01); mBtnExit=(Button)findViewById(R.id.Button02); mBtnOK.setOnClickListener(new View.OnClickListener() { public void onClick(View v) { setTitle("this OK button"); } }); mBtnExit.setOnClickListener(new View.OnClickListener() { public void onClick(View v) { finish(); } }); }}

 

2. main.xml(layout)

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent" ><Button android:id="@+id/Button01" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="@string/button_ok"></Button><Button android:id="@+id/Button02" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="@string/button_exit"></Button></LinearLayout>

 

3. strings.xml

<?xml version="1.0" encoding="utf-8"?><resources> <string name="hello">Hello World, ex02!</string> <string name="app_name">ex02</string> <string name="button_ok">OK</string> <string name="button_exit">Exit</string></resources>

 

--完--