Android开发中项目实现一个自定义Tab选项卡功能

import android.app.TabActivity;import android.content.Intent;import android.os.Bundle;import android.widget.*;import android.widget.TabHost.OnTabChangeListener;import android.os.Build;import android.view.View;import java.lang.reflect.Field;import android.view.LayoutInflater;public class testTabActivity extends TabActivity {    @Override   public void onCreate(Bundle savedInstanceState) {     super.onCreate(savedInstanceState);     int width =45;     int height =48;     final TabHost tabs = getTabHost();     final TabWidget tabWidget = tabs.getTabWidget();     Field mBottomLeftStrip;     Field mBottomRightStrip;     LayoutInflater.from(this).inflate(R.layout.tab_views, tabs.getTabContentView(), true);     tabs.addTab(tabs.newTabSpec("first tab")       .setIndicator("信息",getResources().getDrawable(R.drawable.m))       .setContent(new Intent(testTabActivity.this,OneActivty.class))       );     tabs.addTab(tabs.newTabSpec("second tab")     .setIndicator("收藏",getResources().getDrawable(R.drawable.n))     .setContent(R.id.content));     tabs.addTab(tabs.newTabSpec("second tab")       .setIndicator("设置",getResources().getDrawable(R.drawable.s))       .setContent(R.id.content));     for (int i =0; i < tabWidget.getChildCount(); i++) {              tabWidget.getChildAt(i).getLayoutParams().height = height;       tabWidget.getChildAt(i).getLayoutParams().width = width;           final TextView tv = (TextView) tabWidget.getChildAt(i).findViewById(android.R.id.title);      tv.setTextColor(this.getResources().getColorStateList(android.R.color.white));            if (Float.valueOf(Build.VERSION.RELEASE) <= 2.1) {        try {          mBottomLeftStrip = tabWidget.getClass().getDeclaredField ("mBottomLeftStrip");          mBottomRightStrip = tabWidget.getClass().getDeclaredField ("mBottomRightStrip");          if(!mBottomLeftStrip.isAccessible()) {           mBottomLeftStrip.setAccessible(true);          }          if(!mBottomRightStrip.isAccessible()){           mBottomRightStrip.setAccessible(true);          }         mBottomLeftStrip.set(tabWidget, getResources().getDrawable (R.drawable.no));         mBottomRightStrip.set(tabWidget, getResources().getDrawable (R.drawable.no));        } catch (Exception e) {         e.printStackTrace();        }     } else {          }     View vvv = tabWidget.getChildAt(i);  if(tabs.getCurrentTab()==i){      vvv.setBackgroundDrawable(getResources().getDrawable(R.drawable.tab_button));  }  else {      vvv.setBackgroundDrawable(getResources().getDrawable(R.drawable.bar));  }     }          tabs.setOnTabChangedListener(new OnTabChangeListener(){  @Override  public void onTabChanged(String tabId) {   // TODO Auto-generated method stub   for (int i =0; i < tabWidget.getChildCount(); i++) {   View vvv = tabWidget.getChildAt(i);   if(tabs.getCurrentTab()==i){       vvv.setBackgroundDrawable(getResources().getDrawable(R.drawable.tab_button));   }   else {       vvv.setBackgroundDrawable(getResources().getDrawable(R.drawable.bar));   }   }  }});   }}