自定義 action Bar

問題：有時需要將aciton items從坐向右排列，或者在action bar上顯示更多的內容。

//hiding default app icon
ActionBar actionBar = getActionBar();
actionBar.setDisplayShowHomeEnabled(false);
//displaying custom ActionBar
View mActionBarView = getLayoutInflater().inflate(R.layout.my_action_bar, null);
actionBar.setCustomView(mActionBarView);
actionBar.setDisplayOptions(ActionBar.DISPLAY_SHOW_CUSTOM)

actionBar.setDisplayShowCustomEnabled(true);

my_action_bar.xml:

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@color/turquoise">

    <ImageButton 
        android:id="@+id/btn_slide"
        android:layout_height="wrap_content"
        android:layout_width="wrap_content"
        android:background="@null"
        android:scaleType="centerInside"
        android:src="@drawable/btn_slide"
        android:paddingRight="50dp"
        android:onClick="toggleMenu"
        android:paddingTop="4dp"/>
</RelativeLayout>

或者動態添加action view

 RelativeLayout relative = new RelativeLayout(mActionBar.getThemedContext());
    mSearchView = new SearchView(mActionBar.getThemedContext());
    mSearchView.setLayoutParams(new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.MATCH_PARENT));
    mSearchView.setIconifiedByDefault(false);
    mSearchView.setGravity(Gravity.LEFT);
    relative.addView(mSearchView);
    mActionBar.setDisplayShowCustomEnabled(true);
    mActionBar.setCustomView(relative);