Android用tabhost实现 界面切换，每个界面为一个独立的activity

//  要extends TabActivity
public class Main_activity extends TabActivity {
private TabHost tabHost;//  建立Tabhost控件

protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);

tabHost = getTabHost();
addTab("act1", "界面1", blue_tooth_Activity.class);//添加
addTab("act2", "界面2", map_Activity.class);
addTab("act3", "界面3", plane_parameter_activity.class);

setContentView(tabHost);// 显示

}
/**
* 添加Activity标签
* @param tag   标识
* @param title 标签标题
* @param clazz 激活的界面
*/
private void addTab(String tag, String title, Class clazz) {
TabHost.TabSpec tabSpec = tabHost.newTabSpec(tag);
tabSpec.setIndicator(title);

Intent intent = new Intent(getApplicationContext(),clazz);
tabSpec.setContent(intent);
tabHost.addTab(tabSpec);
}

@Override
protected void onStop() {
super.onStop();
}
}