在用ActivityGroup实现的TabHost时，由tab1切换到tab2再切换回来时，会重新加载tab1里的activity
public class MainUIActivity extendsActivityGroup{
private Context context=this;
private TabHost mTabhost;
private String TAB1="首页";
private String TAB2="收藏";
private String TAB3="3";
private String TAB4="4";
private String TAB5="更多";
//定义数组来存放按钮图片
private int mImageViewArray[] = {R.drawable.tab_home_btn,R.drawable.tab_message_btn,R.drawable.tab_selfinfo_btn,
R.drawable.tab_square_btn,R.drawable.tab_more_btn};
//Tab选项卡的文字
private String mTextviewArray[] = {TAB1, TAB2, TAB3, TAB4, TAB5};
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.tab_main);
mTabhost=(TabHost) findViewById(R.id.tabhost1);
mTabhost.setup();
mTabhost.setup(this.getLocalActivityManager());
Intent i1=new Intent(this,MainActivity.class);
Intent i_collect=new Intent(this,CollectActivity.class);
//Intent i1=new Intent(this,MainActivity.class);
//Intent i1=new Intent(this,MainActivity.class);
//Intent i1=new Intent(this,MainActivity.class);
mTabhost.addTab(mTabhost.newTabSpec(TAB1).setIndicator(getTabItemView(0)).setContent(R.id.zhuye).setContent(i1));
//注意，这里是newTabSpec(TAB2),每个tab选项卡要写的不一样，这样才能保存原来的状态
mTabhost.addTab(mTabhost.newTabSpec(TAB2).setIndicator(getTabItemView(1)).setContent(R.id.zhuye2).setContent(i_collect));
mTabhost.addTab(mTabhost.newTabSpec(TAB1).setIndicator(getTabItemView(2)).setContent(R.id.zhuye3).setContent(i1));
mTabhost.addTab(mTabhost.newTabSpec(TAB1).setIndicator(getTabItemView(3)).setContent(R.id.zhuye4).setContent(i1));
mTabhost.addTab(mTabhost.newTabSpec(TAB1).setIndicator(getTabItemView(4)).setContent(R.id.zhuye5).setContent(i1));
}
/**
* 给Tab按钮设置图标和文字
*/
private View getTabItemView(int index){
View view = LayoutInflater.from(context).inflate(R.layout.tab_item, null);
ImageView imageView = (ImageView) view.findViewById(R.id.tab_icon);
imageView.setImageResource(mImageViewArray[index]);
TextView textView = (TextView) view.findViewById(R.id.tab_name);
textView.setText(mTextviewArray[index]);
return view;
}
public static Intent createIntent(Context context) {
Intent i = new Intent(context, MainActivity.class);
i.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
return i;
}
}
解决方法在上面的代码中已经写了，就是为每个tab选项卡设置不同的tag
