ViewPager与ActionBar
之前使用过 viewpager indicator开源框架
1.在官方借鉴一些样式信息
android:theme="@style/CustomActionBarTheme"
//actionbar的样式
parent="@style/Theme.AppCompat.Light"
parent="">
@style/MyActionBarTabs
@style/MyActionBarTabs
parent="@style/Widget.AppCompat.ActionBar.TabView">
@drawable/actionbar_tab_indicator
@drawable/actionbar_tab_indicator
//top的选择器
android:state_pressed="false"
android:drawable="@drawable/tab_unselected_example" />
android:state_pressed="false"
android:drawable="@drawable/tab_selected_example" />
android:state_pressed="false"
android:drawable="@drawable/tab_unselected_focused_example" />
android:state_pressed="false"
android:drawable="@drawable/tab_selected_focused_example" />
android:state_pressed="true"
android:drawable="@drawable/tab_unselected_pressed_example" />
android:state_pressed="true"
android:drawable="@drawable/tab_selected_pressed_example" />
android:state_pressed="true"
android:drawable="@drawable/tab_unselected_pressed_example" />
android:state_pressed="true"
android:drawable="@drawable/tab_selected_pressed_example" />
2.获取actionbar对象 设置属性
ActionBar actionBar = getSupportActionBar();
actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
//添加头部信息
ActionBar.Tab tab = actionBar.newTab()
.setText("home")
.setTabListener(new MyTabListener(
this, "home", HomeFragment.class));
actionBar.addTab(tab);
//创建toblistener类
public class MyTabListener implements ActionBar.TabListener{
private Fragment mFragment;
private final Activity mActivity;
private final String mTag;
private final Class mClass;
/** Constructor used each time a new tab is created.
* @param activity The host Activity, used to instantiate the fragment
* @param tag The identifier tag for the fragment
* @param clz The fragment's Class, used to instantiate the fragment
*/
public MyTabListener(Activity activity, String tag, Class clz) {
mActivity = activity;
mTag = tag;
mClass = clz;
}
@Override
public void onTabSelected(ActionBar.Tab tab, FragmentTransaction ft) {
/* // Check if the fragment is already initialized
if (mFragment == null) {
// If not, instantiate and add it to the activity
mFragment = Fragment.instantiate(mActivity, mClass.getName());
ft.add(android.R.id.content, mFragment, mTag);
} else {
// If it exists, simply attach it in order to show it
ft.attach(mFragment);
}*/
//viewpager与actionbar关联
mViewpager.setCurrentItem(tab.getPosition());
}
@Override
public void onTabReselected(ActionBar.Tab tab, FragmentTransaction ft) {
}
}
3.创建fragment 与viewpager
mViewpager.setAdapter(new MyAdapter(getSupportFragmentManager()));
mViewpager.setOnPageChangeListener(new ViewPager.SimpleOnPageChangeListener(){
@Override
public void onPageSelected(int position) {
super.onPageSelected(position);
//actionbar与viewpager关联
getSupportActionBar().setSelectedNavigationItem(position);
}
});
//设置adapter 继承 FragmentPagerAdapter
public class MyAdapter extends FragmentPagerAdapter{
public MyAdapter(FragmentManager fm) {
super(fm);
}
@Override
public Fragment getItem(int position) {
//创建你要添加的fragment
Fragment fragment;
if (position==0){
fragment=new HomeFragment();
}else {
fragment=new AppFragment();
}
return fragment;
}
@Override
public int getCount() {
return 2;
}
}
//在布局中添加上这段
android:id="@+id/pager_title_strip"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="top"
android:background="#33b5e5"
android:textColor="#fff"
android:paddingTop="4dp"
android:paddingBottom="4dp" />
//在adapter中添加这个方法
@Override
public CharSequence getPageTitle(int position) {
return str[position];
}
ViewPager与ActionBar
