android 25 底部导航框架学习 BottomNavigationView

compile 'com.android.support:design:25.0.0'

2.res/menu/创建一个menu文件

<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android">
<itemandroid:id="@+id/add"
android:icon="@mipmap/ic_launcher"
android:title="call" />
<itemandroid:id="@+id/delete"
android:icon="@mipmap/ic_launcher"
android:title="message" />
<itemandroid:id="@+id/setting"
android:icon="@mipmap/ic_launcher"
android:title="setting" />

<itemandroid:id="@+id/me"
android:icon="@mipmap/ic_launcher"
android:title="me"/>
</menu>

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent">
<TextView
android:id="@+id/text"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerInParent="true"
android:text="Hello World!"
android:textSize="36sp"/>
<android.support.design.widget.BottomNavigationView
android:layout_width="match_parent"
android:id="@+id/navigation"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
app:itemBackground="@android:color/black"
app:itemIconTint="@android:color/white"
app:itemTextColor="@android:color/white"
app:menu="@menu/nat"/>

</RelativeLayout>

package com.example.administrator.myapplication;

import android.app.Activity;
import android.os.Bundle;
import android.support.annotation.NonNull;
import android.support.design.widget.BottomNavigationView;
import android.view.MenuItem;
import android.widget.TextView;

/**
* Created by Administrator on 2017/2/22.
*/
public class TestAct extends Activity {
BottomNavigationView navigationView;
TextView tv;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_test);
tv= (TextView) findViewById(R.id.text);
navigationView= (BottomNavigationView) findViewById(R.id.navigation);
navigationView.setOnNavigationItemSelectedListener(
new BottomNavigationView.OnNavigationItemSelectedListener() {
@Override
public boolean onNavigationItemSelected(@NonNull MenuItem item) {
tv.setText(item.getTitle().toString().toUpperCase());
return true;
}
});
}
}