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java - Logo 未显示在操作栏上

转载 作者:行者123 更新时间:2023-12-02 04:43:48 24 4
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我试图简单地在 android 中的 ActionBar 上放置一个 Logo ,但似乎没有任何效果。我确实尝试了在这个网站和其他网站上找到的所有解决方案,但没有任何运气。任何帮助将不胜感激,

雅各布

这是我的java:

public class Home extends ActionBarActivity {

@Override
protected void onCreate(Bundle savedInstanceState) {

setTheme(R.style.AppTheme);
super.onCreate(savedInstanceState);

setContentView(R.layout.activity_home);





getSupportActionBar().setDisplayUseLogoEnabled(true);
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
getSupportActionBar().setLogo(R.drawable.ic_launcher);


mNavItems.add(new NavItem("Home", "Find everything you need to know in one place", R.drawable.home_icon));
mNavItems.add(new NavItem("Learn About Our Programs", "Learn about what we do to help the city", R.drawable.list));
mNavItems.add(new NavItem("About Us", "Get to know about us on the personal level", R.drawable.info_circled_alt));
mNavItems.add(new NavItem("Contact Us", "Want to know more about something? Send us an email or phone call", R.drawable.questionm));

// DrawerLayout
mDrawerLayout = (DrawerLayout) findViewById(R.id.drawerLayout);
mDrawerLayout.setDrawerShadow(R.drawable.drawer_shadow, GravityCompat.START);

// Populate the Navigtion Drawer with options
mDrawerPane = (RelativeLayout) findViewById(R.id.drawerPane);
mDrawerList = (ListView) findViewById(R.id.navList);
DrawerListAdapter adapter = new DrawerListAdapter(this, mNavItems);
mDrawerList.setAdapter(adapter);

// Drawer Item click listeners
mDrawerList.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
selectItemFromDrawer(position);
}
});
mDrawerToggle = new ActionBarDrawerToggle(this, mDrawerLayout, R.string.drawer_opem, R.string.drawer_close) {
@Override
public void onDrawerOpened(View drawerView) {
super.onDrawerOpened(drawerView);

invalidateOptionsMenu();
}

@Override
public void onDrawerClosed(View drawerView) {
super.onDrawerClosed(drawerView);
Log.d(TAG, "onDrawerClosed: " + getTitle());

invalidateOptionsMenu();
}


};


mDrawerLayout.setDrawerListener(mDrawerToggle);

}


@Override
protected void onPostCreate(Bundle savedInstanceState) {
super.onPostCreate(savedInstanceState);
mDrawerToggle.syncState();
}

@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Pass the event to ActionBarDrawerToggle
// If it returns true, then it has handled
// the nav drawer indicator touch event
if (mDrawerToggle.onOptionsItemSelected(item)) {
return true;
}

// Handle your other action bar items...

return super.onOptionsItemSelected(item);
}







private void selectItemFromDrawer(int position) {


// Close the drawer
mDrawerLayout.closeDrawer(mDrawerPane);
Intent intent;
switch (position) {


case 0:
new Handler().postDelayed(new Runnable() {
@Override
public void run() {

Intent i = new Intent(Home.this, Home.class);
i.addFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP | Intent.FLAG_ACTIVITY_NO_ANIMATION);
startActivity(i);


overridePendingTransition(R.animator.animation1, R.animator.animation2);
}
}, 300);
break;
case 1:
new Handler().postDelayed(new Runnable() {
@Override
public void run() {

Intent i = new Intent(Home.this, FindOpp.class);
i.addFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP | Intent.FLAG_ACTIVITY_NO_ANIMATION);
startActivity(i);


overridePendingTransition(R.animator.animation1, R.animator.animation2);;
}
}, 300);



break;


case 2:
new Handler().postDelayed(new Runnable() {
@Override
public void run() {

Intent i = new Intent(Home.this, About_Us.class);
i.addFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP | Intent.FLAG_ACTIVITY_NO_ANIMATION);
startActivity(i);


overridePendingTransition(R.animator.animation1, R.animator.animation2);;
}
}, 300);
break;

}
}


}

class NavItem {
String mTitle;
String mSubtitle;
int mIcon;

public NavItem(String title, String subtitle, int icon) {
mTitle = title;
mSubtitle = subtitle;
mIcon = icon;
}
}
class DrawerListAdapter extends BaseAdapter {

Context mContext;
ArrayList<NavItem> mNavItems;

public DrawerListAdapter(Context context, ArrayList<NavItem> navItems) {
mContext = context;
mNavItems = navItems;
}

@Override
public int getCount() {
return mNavItems.size();
}

@Override
public Object getItem(int position) {
return mNavItems.get(position);
}

@Override
public long getItemId(int position) {
return 0;
}

@Override
public View getView(int position, View convertView, ViewGroup parent) {
View view;

if (convertView == null) {
LayoutInflater inflater = (LayoutInflater) mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
view = inflater.inflate(R.layout.drawer_item, null);
}
else {
view = convertView;
}

TextView titleView = (TextView) view.findViewById(R.id.title);
TextView subtitleView = (TextView) view.findViewById(R.id.subTitle);
ImageView iconView = (ImageView) view.findViewById(R.id.icon);

titleView.setText( mNavItems.get(position).mTitle );
subtitleView.setText( mNavItems.get(position).mSubtitle );
iconView.setImageResource(mNavItems.get(position).mIcon);

return view;
}

}
class PreferencesFragment extends Fragment {


public PreferencesFragment() {
// Required empty public constructor
}


@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
return inflater.inflate(R.layout.fragment_prefences, container, false);
}

}

最佳答案

这可能对你有帮助,试试这个

getSupportActionBar().setDisplayShowHomeEnabled(true);
getSupportActionBar().setIcon(R.drawable.ic_launcher);

关于java - Logo 未显示在操作栏上,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/29866843/

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