这里主要实现用Tab切换不同的Fragment,点击View显示or隐藏ActionBar,把ActionBar 设为透明,使界面更加友好,详细代码见资源里的ActionBarTabs。
ActionBar Tab主要用于Fragment之间的切换,其必须要设置ActionBar.TabListener,详细代码如下
ActionBarActivity.Java:
代码如下
importandroid.app.ActionBar;
importandroid.app.Activity;
importandroid.app.FragmentTransaction;
importandroid.app.ActionBar.Tab;
importandroid.os.Bundle;
importandroid.os.CountDownTimer;
importandroid.view.MotionEvent;
importandroid.view.Window;
publicclassActionBarActivityextendsActivity {
/** Called when the activity is first created. */
@Override
publicvoidonCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
//使ActionBar变得透明
requestWindowFeature(Window.FEATURE_ACTION_BAR_OVERLAY);
setContentView(R.layout.main);
finalActionBar actionBar = getActionBar();
actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
// remove the activity title to make space for tabs
actionBar.setDisplayShowTitleEnabled(false);
AFragment aFragment =newAFragment();
actionBar.addTab(actionBar.newTab().setText("Tab-A")
.setTabListener(newListenerA(aFragment)));
BFragment bFragment =newBFragment();
actionBar.addTab(actionBar.newTab().setText("Tab-B")
.setTabListener(newListenerB(bFragment)));
}
//点击显示or隐藏ActionBar
publicbooleanonTouchEvent(MotionEvent event){
ActionBar bar = getActionBar();
switch(event.getAction()){
caseMotionEvent.ACTION_UP:
if(bar.isShowing()) bar.hide();
elsebar.show();
break;
default:
break;
}
returntrue;
}
privateclassListenerAimplementsActionBar.TabListener {
privateAFragment mFragment;
// Called to create an instance of the listener when adding a new tab
publicListenerA(AFragment fragment) {
mFragment = fragment;
}
publicvoidonTabSelected(Tab tab, FragmentTransaction ft) {
ft.add(R.id.fragment, mFragment,null);
}
publicvoidonTabUnselected(Tab tab, FragmentTransaction ft) {
ft.remove(mFragment);
}
publicvoidonTabReselected(Tab tab, FragmentTransaction ft) {
// do nothing }
}
}
privateclassListenerBimplementsActionBar.TabListener {
privateBFragment mFragment;
// Called to create an instance of the listener when adding a new tab
publicListenerB(BFragment fragment) {
mFragment = fragment;
}
publicvoidonTabSelected(Tab tab, FragmentTransaction ft) {
ft.add(R.id.fragment, mFragment,null);
}
publicvoidonTabUnselected(Tab tab, FragmentTransaction ft) {
ft.remove(mFragment);
}
publicvoidonTabReselected(Tab tab, FragmentTransaction ft) {
// do nothing }
}
}
}
其中涉及到两个Fragment,在前面Fragment的笔记中讲过,这里就不再赘述。类AFragment实现如下,BFragment实现与这类似:
代码如下
publicclassAFragmentextendsFragment {
publicView onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
returninflater.inflate(R.layout.alayout, container,false);
}
}
【从零开始学android编程】Android编程之ActionBar Tabs用法实例分析
http://m.bbyears.com/flash/131468.html
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