我已经为此搜索了大约三天的解决方案。我试了很多方法,但都做不好。(或者可能我在哪里做错了什么)。因此,我要做的是将"活动"标题更改为当前选项卡名称,每次更改选项卡时,活动标题也应该更改。
所以我有一个MainActivity,其中有3个选项卡和3个不同的选项卡片段。这里的主要活动:
public class MainActivity extends ActionBarActivity {
private Toolbar toolbar;
private ViewPager mPager;
private SlidingTabLayout mTabs;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
toolbar = (Toolbar) findViewById(R.id.app_bar);
setSupportActionBar(toolbar);
mPager = (ViewPager) findViewById(R.id.pager);
mPager.setAdapter(new CustomPagerAdapter(getSupportFragmentManager()));
mTabs = (SlidingTabLayout) findViewById(R.id.tabs);
mTabs.setDistributeEvenly(true);
mTabs.setViewPager(mPager);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_main, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
//Custom ViewPager for the tabs
class CustomPagerAdapter extends FragmentPagerAdapter {
String[] tabsTitles;
String vpPager;
public CustomPagerAdapter(FragmentManager fm) {
super(fm);
tabsTitles = getResources().getStringArray(R.array.tabTitles);
}
@Override
public Fragment getItem(int position) {
//if (position == 0){
// news_fragment news_fragment = new news_fragment();
// return news_fragment;
//}
if (position == 1){
login_fragment login_fragment = new login_fragment();
return login_fragment;
}
else if (position == 2){
about_fragment about_fragment = new about_fragment();
return about_fragment;
}
else {
news_fragment news_fragment = new news_fragment();
return news_fragment;
}
}
@Override
public CharSequence getPageTitle(int position) {
return tabsTitles[position];
}
@Override
public int getCount() {
return 3;
}
}
}
我正在使用这个SlidingTabLayout
试试这个:
viewpager
.setOnPageChangeListener(new ViewPager.OnPageChangeListener() {
@Override
public void onPageSelected(int position) {
// TODO Auto-generated method stub
actionBar.setTitle(tabsTitles[position]);
}
@Override
public void onPageScrolled(int arg0, float arg1, int arg2) {
// TODO Auto-generated method stub
}
@Override
public void onPageScrollStateChanged(int pos) {
// TODO Auto-generated method stub
}
});
更改活动时。运行Firstlt onCreate
方法。所以在你的onCreate
中得到ActionBar
并设置它的标题。
示例
ActionBar actionBar = getActionBar();
actionBar.setTitle("title");
注意:如果使用ActionBar
的支持库,请将getActionBar()
更改为getSupportActionBar()
。
也试试这个:
class CustomPagerAdapter extends FragmentPagerAdapter {
....
Toolbar toolbar;
public CustomPagerAdapter(FragmentManager fm, Toolbar toolbar) {
...
this.toolbar = toolbar;
}
@Override
public Fragment getItem(int position) {
toolbar.setTitle(getPageTitle(position));
...
}
...
}
在您的活动中设置一个自定义操作栏,通过膨胀一些布局,如(创建后):
android.app.ActionBar bar = getActionBar();
bar.setBackgroundDrawable(new ColorDrawable(Color.parseColor("#ffffff")));
bar.setDisplayShowHomeEnabled(false);
bar.setDisplayOptions(ActionBar.DISPLAY_SHOW_CUSTOM);
bar.setCustomView(R.layout.homescreen_actionbar);
在您的自定义布局和片段的onresume方法中使用getactivity()获取其id,并设置您的标题和iit将正常工作。