TabHost与Activity

1、mainactivity 的layout:

<?xml version="1.0" encoding="utf-8"?><TabHost xmlns:android="http://schemas.android.com/apk/res/android"    android:id="@android:id/tabhost"    android:layout_width="fill_parent"    android:layout_height="fill_parent" >    <LinearLayout android:orientation="vertical"          android:layout_width="fill_parent"         android:layout_height="fill_parent">        <FrameLayout            android:id="@android:id/tabcontent"            android:layout_width="fill_parent"            android:layout_height="0dp"            android:layout_weight="1" >        </FrameLayout>    <LinearLayout         android:layout_width="fill_parent"         android:layout_height="wrap_content"        android:orientation="vertical" >    <TabWidget         android:id="@android:id/tabs"        android:layout_width="fill_parent"    android:layout_height="wrap_content" >    </TabWidget>    </LinearLayout>   </LinearLayout></TabHost>

 

2、selector.xml

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="fill_parent"    android:layout_height="fill_parent"    android:orientation="vertical" >    <View        android:id="@+id/tabIndicator"        android:layout_width="fill_parent"        android:layout_height="3dp"        android:background="#a70000" />    <View        android:id="@+id/tabDivider"        android:layout_width="fill_parent"        android:layout_height="1dp"        android:background="#2b2e39" />    <LinearLayout        android:id="@+id/tabView"        android:layout_width="fill_parent"        android:layout_height="wrap_content"        android:gravity="center"        android:orientation="vertical"        android:padding="7dp" >        <ImageView            android:id="@+id/tab_iv_icon"            android:layout_width="30px"            android:layout_height="30px"            android:scaleType="fitCenter"            android:src="@drawable/ic_launcher" />         <TextView             android:id="@+id/tab_tv_text"             android:layout_width="wrap_content"             android:layout_height="wrap_content"             android:textSize="15.0sp" />    </LinearLayout></LinearLayout>

 

3、MainActivity

package com.example.tabhostdemo;import android.os.Bundle;import android.app.Activity;import android.app.TabActivity;import android.content.Intent;import android.view.Menu;import android.view.View;import android.widget.TabHost;import android.widget.TabWidget;import android.widget.TextView;import android.widget.TabHost.OnTabChangeListener;import android.widget.TabHost.TabSpec;public class MainActivity extends TabActivity{private TabHost tabHost;private TabWidget tabWidget;private int preTabId = 0;@Overrideprotected void onCreate(Bundle savedInstanceState) {// TODO Auto-generated method stubsuper.onCreate(savedInstanceState);setContentView(R.layout.activity_main);tabHost = this.getTabHost();tabWidget = this.getTabWidget();tabHost.setFocusable(true);tabHost.setOnTabChangedListener(new OnTabChangeListener() {@Overridepublic void onTabChanged(String tabId) {// TODO Auto-generated method stubint tId = Integer.parseInt(tabId);if(tId != preTabId){setTabBg(tId, true);setTabBg(preTabId, false);preTabId = tId;}}});Intent intent = new Intent(this, Activity1.class);tabHost.addTab(buildTabSpec("0", "标签1", intent));intent = new Intent(this, Activity2.class);tabHost.addTab(buildTabSpec("1", "标签2", intent));intent = new Intent(this, Activity3.class);tabHost.addTab(buildTabSpec("2", "标签3", intent));intent = new Intent(this, Activity4.class);tabHost.addTab(buildTabSpec("3", "标签4", intent));}private TabSpec buildTabSpec(String tabId, String tag1, Intent intent) {try {View view = View.inflate(this, R.layout.selector, null);((TextView) view.findViewById(R.id.tab_tv_text)).setText(tag1);if(tabId.equals("0")){view.findViewById(R.id.tabIndicator).setVisibility(View.VISIBLE);view.findViewById(R.id.tabDivider).setVisibility(View.INVISIBLE);} else{view.findViewById(R.id.tabIndicator).setVisibility(View.INVISIBLE);view.findViewById(R.id.tabDivider).setVisibility(View.VISIBLE);}return tabHost.newTabSpec(tabId).setIndicator(view).setContent(intent);} catch (Exception e) {e.printStackTrace();}return null;}   private void setTabBg(int tabId, boolean isSelected){    System.out.println("tabId:" + tabId);    View myTabView = tabWidget.getChildTabViewAt(tabId);View tabIndicator = myTabView.findViewById(R.id.tabIndicator);View tabDivider = myTabView.findViewById(R.id.tabDivider);View tabView = myTabView.findViewById(R.id.tabView);if(isSelected){tabIndicator.setVisibility(View.VISIBLE);tabDivider.setVisibility(View.INVISIBLE);tabView.setBackgroundColor(0x14161d);} else{tabIndicator.setVisibility(View.INVISIBLE);tabDivider.setVisibility(View.VISIBLE);tabView.setBackgroundColor(0x272c39);}    }}