佈局方法：
Linearlayout線性佈局：
android:orientation="vertical"則每個控件佔據一行
android:orientation="horizontal"則每個控件佔據一列
長度單位：
px---像素
Dip--(dots per inch)
Dp--(device independent piexls)通常用來針對控件的大小
換算公式：px=dp*(dpi/160)
在dpi爲160的屏幕上：1dp=1px
Sp:scaled pixels，通常用來指定字體的大小
控件之------多選按鈕：
實現代碼:
package org.jason;
import android.app.Activity;
import android.os.Bundle;
import android.view.Menu;
importandroid.view.View;
importandroid.view.View.OnClickListener;
import android.widget.CheckBox;
import android.widget.CompoundButton;
import android.widget.CompoundButton.OnCheckedChangeListener;
publicclass MainActivity extends Activity {
private CheckBox runB;
private CheckBox swimB;
private CheckBox sleepB;
@Override
protectedvoid onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
//setContentView(R.layout.activity_main);
setContentView(R.layout.liner_layout);
//通過findViewById方法生成控件對象
runB=(CheckBox)findViewById(R.id.runid);
swimB=(CheckBox)findViewById(R.id.swimid);
sleepB=(CheckBox)findViewById(R.id.sleepid);
/*OnBoxClickListener listener=new OnBoxClickListener();
runB.setOnClickListener(listener);
sleepB.setOnClickListener(listener);
swimB.setOnClickListener(listener);*/
//生成listener對象
OnCheckedListener listener=new OnCheckedListener();
//調用對象的setOnCheckedChangeListener方法綁定監聽器
runB.setOnCheckedChangeListener(listener);
sleepB.setOnCheckedChangeListener(listener);
swimB.setOnCheckedChangeListener(listener);
}
//聲明一個類，實現OnCheckedChangeListener接口
class OnCheckedListener implements OnCheckedChangeListener{
@Override
publicvoid onCheckedChanged(CompoundButton buttonView,
boolean isChecked) {
// TODO Auto-generated method stub
//getId()方法通過控件對象獲取Id
//如果全選按鈕，則使用setCheck(boolean checked)方法
if(buttonView.getId()==R.id.runid){
System.out.println("run");
}elseif(buttonView.getId()==R.id.swimid){
System.out.println("swim");
}elseif(buttonView.getId()==R.id.sleepid){
System.out.println("sleep");
}
//isChecked返回值boolean類型，判斷是否選中
if(isChecked){
System.out.println("checked");
}else{
System.out.println("cancel");
}
}
}
/*class OnBoxClickListener implements OnClickListener{
@Override
public void onClick(View view) {
CheckBox box=(CheckBox)view;
if(view.getId()==R.id.runid){
System.out.println("run");
}else if(view.getId()==R.id.sleepid){
System.out.println("sleep");
}else if(view.getId()==R.id.swimid){
System.out.println("swim");
}
if(box.isChecked()){
System.out.println("box is checked");
}else{
System.out.println("box is unchecked");
}
}
單選按鈕（RadioButton）用法：
<RadioGroup>
<RadioButton
Andriod:…/>
<RadioButton
Android…./>
</RadioGroup>
Activity.java的方法與多選按鈕類似
Radiobutton與checkbox都使用同一個onCheckedChangedlistener接口，而radioGroup實現的是Radio接口