第一种:通过FragmentTabHost+Fragment来实现其点击顶部实现切换页面的效果!
页面结构如下:
第一步:编写布局文件
activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
>
<android.support.v4.app.FragmentTabHost
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="@android:id/tabhost"
>
<!--
系统要求,具体原因暂时还未追究,不然就会报错
这个FrameLayout并不是显示内容的fragment
且其id必须为tabcontent
-->
<FrameLayout
android:id="@android:id/tabcontent"
android:layout_width="0dp"
android:layout_height="0dp"
android:layout_weight="0"/>
</android.support.v4.app.FragmentTabHost>
<!--
用来存放标签所对应的内容,用来显示我们的fragment
若其放置在FragmentTabHost下边,则标签就位于上边,
反之,标签则位于下边
-->
<FrameLayout
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1"
android:id="@+id/fragment"
>
</FrameLayout>
</LinearLayout>
第二步:Activity要继承于FragmentActivity
/**
* 由于AppCompatActivity继承FragmentActivity
* 所以无需再去继承FragmentActivity
*/
public class MainActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
.....
第三步:添加Tab到TabHost中,且让Tab与 Tab所要显示的内容(fragment)绑定在一起
public class MainActivity extends FragmentActivity {
private FragmentTabHost mTabHost;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
//添加Tab到TabHost中,且让Tab与 Tab所要显示的内容(fragment)绑定在一起
mTabHost=(FragmentTabHost) findViewById(android.R.id.tabhost);
/**
* 在setup()里边,其才去获取到TabWidget,所以在此之前,不能直接调用getTabWidget()方法;
*/
mTabHost.setup(this, getSupportFragmentManager(), R.id.fragment);
/**
*addTab:添加标签到TabHost中
* setIndicator:表示设置标签的logo
*/
mTabHost.addTab(mTabHost.newTabSpec("message").setIndicator("消息"),
MessageFragment.class, null);
mTabHost.addTab(mTabHost.newTabSpec("connect").setIndicator("联系人"),
WatchFragment.class, null);
mTabHost.addTab(mTabHost.newTabSpec("watch").setIndicator("看点"),
ConnectFragment.class, null);
}
}
第四步:编写XML和fragment。
ConnectFragment.java:
public class ConnectFragment extends Fragment {
@Nullable
@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
View view=inflater.inflate(R.layout.activity_connetion,null);
return view;
}
}
activity_connection.xml:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:gravity="center"
android:layout_height="match_parent">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Connetion"
android:textSize="30dp"
/>
</LinearLayout>
总结:1>
Tab存在于TabWidget内,而TabWidget是存在于TabHost内。与此同时,
在TabHost内无需在写一个TabWidget,系统已经内置了一个TabWidget
2>关于fragment内容的布局,其位置可以放置在FragmentTabHost外面的上边,里边,或者外边的下边都可以;
当放置在上边时,那么标签是位于底部的;
当放置在里边或者外面的下边时,则此时,标签是位于顶部的;
第二种:通过FragmentTabHost+Fragment来实现其点击底部实现切换页面的效果!**
第一步:activity_main.xml(主布局文件)
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
>
<!-- 存放主要页面内容 -->
<FrameLayout
android:id="@+id/maincontent"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1"
>
</FrameLayout>
<!-- 底层菜单 -->
<android.support.v4.app.FragmentTabHost
android:id="@android:id/tabhost"
android:layout_width="match_parent"
android:layout_height="wrap_content"
>
<FrameLayout
android:id="@android:id/tabcontent"
android:layout_width="0dp"
android:layout_height="0dp"
android:layout_weight="0"
>
</FrameLayout>
</android.support.v4.app.FragmentTabHost>
</LinearLayout>
第二步:activity_connection.xml布局((由于只有文字不同,这里只给出一个))
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:gravity="center"
android:layout_height="match_parent">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Connetion"
android:textSize="30dp"
/>
</LinearLayout>
第三步:ConnectFragment.java同上,只显示一个
public class ConnectFragment extends Fragment {
@Nullable
@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
View view=inflater.inflate(R.layout.activity_connetion,null);
return view;
}
}
第四步:tabcontent.xml(具体底部菜单详细布局)
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:gravity="center_horizontal"
android:layout_height="match_parent">
<ImageView
android:id="@+id/image"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
/>
<TextView
android:id="@+id/text"
android:padding="2dp"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textColor="@android:color/white"
/>
</LinearLayout>
第四步:bt_selector.xml(底部菜单点击背景)
<selector xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent" android:layout_height="match_parent">
<item android:drawable="@drawable/icon_setting" android:state_pressed="true" />
<item android:drawable="@drawable/icon_setting" android:state_selected="true" />
</selector>
第五步:MainActivity.java(主代码)
public class MainActivity extends AppCompatActivity {
private FragmentTabHost fragmentTabHost;
private String texts[]={"消息","联系人","看点","动态"};
private int imageButton[]={R.drawable.icon_setting,R.drawable.icon_setting,R.drawable.icon_setting,R.drawable.icon_setting};
private Class fragmentArray[]={MessageFragment.class,ConnectFragment.class, WatchFragment.class, DynamicFragment.class};
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
//实例化tabhost
fragmentTabHost=(FragmentTabHost)findViewById(android.R.id.tabhost);
fragmentTabHost.setup(this,getSupportFragmentManager(),R.id.maincontent);
for (int i=0;i<texts.length;i++){
TabHost.TabSpec spec=fragmentTabHost.newTabSpec(texts[i]).setIndicator(getView(i));
fragmentTabHost.addTab(spec,fragmentArray[i],null);
fragmentTabHost.getTabWidget().getChildAt(i).setBackgroundResource(R.color.colorAccent);
}
}
private View getView(int i) {
//取得布局实例
View view=View.inflate(MainActivity.this, R.layout.tabcontent, null);
//取得布局对象
ImageView imageView=(ImageView) view.findViewById(R.id.image);
TextView textView=(TextView) view.findViewById(R.id.text);
//设置图标
imageView.setImageResource(imageButton[i]);
//设置标题
textView.setText(texts[i]);
return view;
}
}
如果想在FragmentTabHost中背景显示颜色的话,就用
.setBackgroundResource(R.color.colorAccent)
如果想显示背景图片的话,就用
.setBackgroundResource(R.drawable.bt_selector);