Android Material Design Toolbar笔记1

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.yxw.shipingwangzhang">

<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:roundIcon="@mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="@style/AppTheme">
<activity android:name=".MainActivity" android:label="主页">

<intent-filter>
<action android:name="android.intent.action.MAIN" />

<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>

设置menu.xml

<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto">
<item
android:id="@+id/backup"
android:icon="@drawable/ic_backup"
android:title="title"
app:showAsAction="always" />
<item
android:id="@+id/delete"
android:icon="@drawable/ic_delete"
android:title="Delete"
app:showAsAction="ifRoom"/>
<item
android:id="@+id/setting"
android:icon="@drawable/ic_settings"
android:title="Settings"
app:showAsAction="never"/>

</menu>

设置MainActivity

package com.example.yxw.shipingwangzhang;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.support.v7.widget.Toolbar;
import android.view.Menu;
import android.view.MenuItem;
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);
setSupportActionBar(toolbar);
}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
//把menu.xml设置到Toolbar
getMenuInflater().inflate(R.menu.toolbar,menu);
return true;
}

@Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()){
//设置点击事件Toolbar
case R.id.backup:
Toast.makeText(this,"backup",Toast.LENGTH_SHORT).show();
break;
case R.id.delete:
Toast.makeText(this,"delete",Toast.LENGTH_SHORT).show();
break;
case R.id.setting:
Toast.makeText(this,"setting",Toast.LENGTH_SHORT).show();
break;
default:
}
return true;
}
}