ToolBar

先将app的theme改变为noActionBar

XML布局

xml version= "1.0" encoding= "utf-8" ?>

< FrameLayout xmlns: android = "http://schemas.android.com/apk/res/android"

xmlns: app = "http://schemas.android.com/apk/res-auto"

xmlns: tools = "http://schemas.android.com/tools"

android :layout_width= "match_parent"

android :layout_height= "match_parent"

>

< android.support.v7.widget.Toolbar

android :id= "@+id/myTool"

android :layout_width= "match_parent"

android :layout_height= "?attr/actionBarSize"

android :background= "#99ffcc"

android :theme= "@style/ThemeOverlay.AppCompat.Dark.ActionBar"

app :popupTheme= "@style/ThemeOverlay.AppCompat.Light"

> android.support.v7.widget.Toolbar >

FrameLayout >

RES资源

在res文件夹中创建menu文件夹 , 右键创建menu资源文件

< item

android :id= "@+id/menu1"

android :icon= "@drawable/ic_archive_black_48dp" 图标

android :title= "menu1" 标题

app :showAsAction= "always" > item > 显示的位置

always 总是显示

ifRoom 屏幕空间不足时就会隐藏

never 从不显示

JAVA

通过 setSupportActionBar();设置

加载menu资源文件

@Override

public boolean onCreateOptionsMenu(Menu menu) {

getMenuInflater().inflate(R.menu. toolbar , menu);

return true ;

}

设置监听

@Override

public boolean onOptionsItemSelected(MenuItem item) {

switch (item.getItemId()) {

case R.id. menu1 :

Toast. makeText ( this , "menu1" , Toast. LENGTH_SHORT ).show();

break ;

case R.id. menu2 :

Toast. makeText ( this , "menu2" , Toast. LENGTH_SHORT ).show();

break ;

case R.id. menu3 :

Toast. makeText ( this , "menu3" , Toast. LENGTH_SHORT ).show();

break ;

}

return true ;

}

actionBar = getSupportActionBar();

if ( actionBar != null ){

actionBar .setDisplayHomeAsUpEnabled( true ); //默认为小箭头 id为 android.R.id. home

actionBar .setHomeAsUpIndicator(R.drawable. ic_visibility_black_48dp );

}