最近设计安卓里面有个标题栏，里面有个后退键，可以完成后退之类的功能。

好，刚好可以用Toolbar去实现

上代码：activity_main.xml

<?xml version="1.0" encoding="utf-8"?><android.support.design.widget.CoordinatorLayout 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" tools:context=".MainActivity"> <android.support.design.widget.AppBarLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:theme="@style/AppTheme.AppBarOverlay"> <android.support.v7.widget.Toolbar android:id="@+id/toolbar" android:layout_width="match_parent" android:layout_height="wrap_content" android:background="?attr/colorPrimary" app:popupTheme="@style/AppTheme.PopupOverlay"> <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_centerInParent="true" android:layout_gravity="center" android:text="设置" android:textSize="22sp" /> </android.support.v7.widget.Toolbar> </android.support.design.widget.AppBarLayout></android.support.design.widget.CoordinatorLayout>

这里需要引用styles.xml在里面加样式

<resources> <!-- Base application theme. --> <style name="AppTheme" parent="Base.Theme.AppCompat.Light"> <!-- Customize your theme here. --> <item name="colorPrimary">@color/colorPrimary</item> <item name="colorPrimaryDark">@color/colorPrimaryDark</item> <item name="colorAccent">@color/colorAccent</item> </style> <style name="AppTheme.NoActionBar"> <item name="windowActionBar">false</item> <item name="windowNoTitle">true</item> </style> <style name="AppTheme.AppBarOverlay" parent="ThemeOverlay.AppCompat.Dark.ActionBar" /> <style name="AppTheme.PopupOverlay" parent="ThemeOverlay.AppCompat.Light" /></resources>

最后主程序：

package action.sun.com.testtoobar1;import android.os.Bundle;import android.support.design.widget.FloatingActionButton;import android.support.design.widget.Snackbar;import android.support.v7.app.AppCompatActivity;import android.support.v7.widget.Toolbar;import android.view.View;import android.view.Menu;import android.view.MenuItem;import android.view.Window;import android.view.WindowManager;import android.widget.Toast;public class MainActivity extends AppCompatActivity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar); //一定要加，为了去掉本身的标题文字 toolbar.setTitle(""); //初始化toolbar setSupportActionBar(toolbar); //左边的小箭头（注意需要在setSupportActionBar(toolbar)之后才有效果） toolbar.setNavigationIcon(R.mipmap.back); } @Override public boolean onCreateOptionsMenu(Menu menu) { // Inflate the menu; this adds items to the action bar if it is present. Toast.makeText(MainActivity.this, "选择了菜单", Toast.LENGTH_SHORT).show(); //初始化右边的菜单选项 //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(); Toast.makeText(MainActivity.this, "选择了后退按钮="+id, Toast.LENGTH_SHORT).show(); //noinspection SimplifiableIfStatement return super.onOptionsItemSelected(item); }}

到此代码完毕，就能够完成需要上图实现的效果了

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。