show icon in actionbar/toolbar with AppCompat-v7 21

问题

I tried these - but still do not see the icon like before:

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

It seems to work when I use custom toolbar - but that would force me to touch all layouts - is there a better way to do so?

回答1:

getSupportActionBar().setDisplayShowHomeEnabled(true);

along with

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

回答2:

In modern Android UIs developers should lean more on a visually distinct color scheme for toolbars than on their application icon. The use of application icon plus title as a standard layout is discouraged on API 21 devices and newer.

If you disagree you can try with:

To create the toolbar in XML:

<android.support.v7.widget.Toolbar  
    android:id="@+id/my_awesome_toolbar"
    android:layout_height="wrap_content"
    android:layout_width="match_parent"
    android:minHeight="?attr/actionBarSize"
    android:background="?attr/colorPrimary" />

In your activity:

@Override
public void onCreate(Bundle savedInstanceState) {  
    super.onCreate(savedInstanceState);
    setContentView(R.layout.my_layout);

    Toolbar toolbar = (Toolbar) findViewById(R.id.my_awesome_toolbar);
    setSupportActionBar(toolbar);
}

Use the setLogo() method to set the icon. Code source.

回答3:

This worked for me:

    getSupportActionBar().setHomeButtonEnabled(true);
    getSupportActionBar().setDisplayShowHomeEnabled(true);
    getSupportActionBar().setDisplayUseLogoEnabled(true);
    getSupportActionBar().setLogo(R.drawable.ic_logo);
    getSupportActionBar().setDisplayShowTitleEnabled(false); //optional

as well as:

    getSupportActionBar().setHomeButtonEnabled(true);
    getSupportActionBar().setDisplayShowHomeEnabled(true);
    getSupportActionBar().setIcon(R.drawable.ic_logo); //also displays wide logo
    getSupportActionBar().setDisplayShowTitleEnabled(false); //optional

回答4:

simplest thing to do; just add:

app:navigationIcon="@drawable/ic_action_navigation_menu">

to the <android.support.v7.widget.Toolbar tag

where @drawable/ic_action_navigation_menu is the name of icon

回答5:

A better way for setting multiple options:

setIcon/setLogo method will only work if you have set DisplayOptions Try this -

actionBar.setDisplayOptions(ActionBar.DISPLAY_SHOW_HOME | ActionBar.DISPLAY_SHOW_TITLE);
actionBar.setIcon(R.drawable.ic_launcher);

You can also set options for displaying LOGO(just add constant ActionBar.DISPLAY_USE_LOGO). More information - displayOptions

回答6:

Try using:

ActionBar ab = getSupportActionBar();
ab.setHomeButtonEnabled(true);
ab.setDisplayUseLogoEnabled(true);
ab.setLogo(R.drawable.ic_launcher);

回答7:

if you want to set the home or back icon (not logo or static icon) so you can use

 getSupportActionBar().setDisplayHomeAsUpEnabled(true);
 getSupportActionBar().setHomeAsUpIndicator( getResources().getDrawable(R.drawable.home) );

回答8:

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

OR make a XML layout call the tool_bar.xml

<?xml version="1.0" encoding="utf-8"?>
<android.support.v7.widget.Toolbar xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:background="@color/colorPrimary"
    android:theme="@style/ThemeOverlay.AppCompat.Dark"
    android:elevation="4dp">

    <RelativeLayout
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:orientation="horizontal">

    <ImageButton
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:background="@color/colorPrimary"
        android:src="@drawable/ic_action_search"/>

    </RelativeLayout>
</android.support.v7.widget.Toolbar>

Now in you main activity add this line

 <include
     android:id="@+id/tool_bar"
     layout="@layout/tool_bar" />

回答9:

For Actionbar:

getActionBar().setDisplayHomeAsUpEnabled(true);
getActionBar().setHomeAsUpIndicator(R.drawable.ic_action_back);

For Toolbar:

getSupportActionBar().setDisplayHomeAsUpEnabled(true);
getSupportActionBar().setHomeAsUpIndicator(R.drawable.ic_action_back);

回答10:

If you dont want to set your toolbar as action bar using setSupportActionBar, you can add a logo next to your navigation icon (if you have a back button for example) like this:

toolbar.setLogo();

or in xml

<android.support.v7.widget.Toolbar 
    ....
    android:logo="@drawable/logo"
    app:logo="@drawable/logo"/>

And even if you have a title set on the Toolbar, the the title will still show.

Ex: The green check in the image below is the logo

回答11:

Try this:

import android.support.v7.app.ActionBar;
import android.support.v7.app.AppCompatActivity;
...
    ActionBar actionbar = getSupportActionBar();
    actionbar.setDisplayHomeAsUpEnabled(true);
    actionbar.setHomeAsUpIndicator(R.drawable.ic_launcher);

so your icon will be used for Home / back
or

import android.support.v7.app.ActionBar;
import android.support.v7.app.AppCompatActivity;
...
    ActionBar actionbar = getSupportActionBar();
    actionbar.setDisplayShowHomeEnabled(true);
    actionbar.setIcon(R.drawable.ic_launcher);

for static icon

回答12:

toolbar.setLogo(resize(logo, (int) Float.parseFloat(mContext.getResources().getDimension(R.dimen._120sdp) + ""), (int) Float.parseFloat(mContext.getResources().getDimension(R.dimen._35sdp) + "")));


public Drawable resize(Drawable image, int width, int height)
{
    Bitmap b = ((BitmapDrawable) image).getBitmap();
    Bitmap bitmapResized = Bitmap.createScaledBitmap(b, width, height, false);
    return new BitmapDrawable(getResources(), bitmapResized);
}

回答13:

In Xamarin.Android you can use these:

SupportActionBar.SetHomeButtonEnabled(true);
SupportActionBar.SetDisplayShowHomeEnabled(true);
SupportActionBar.SetDisplayUseLogoEnabled(true);
SupportActionBar.SetIcon(Resource.Drawable.ic_launcher);
SupportActionBar.SetDisplayShowTitleEnabled(false);

using Android.Support.V7.App.AppCompatActivity is required.

回答14:

Try this. For me it worked

getSupportActionBar().setDisplayShowHomeEnabled(true);
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
getSupportActionBar().setDisplayUseLogoEnabled(true);

回答15:

In Kotlin I did the following to just show the icon:

supportActionBar?.setDisplayShowHomeEnabled(true)
supportActionBar?.setIcon(R.drawable.ic_icon_small)

来源：https://stackoverflow.com/questions/26440279/show-icon-in-actionbar-toolbar-with-appcompat-v7-21

标签

android

android-appcompat