Android项目实战之仿网易顶部导航栏效果

<?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" >  <include layout="@layout/head" />   <LinearLayout  android:layout_width="fill_parent"  android:layout_height="wrap_content">  <RadioGroup  android:id="@+id/add_tab_group"  android:layout_width="fill_parent"  android:layout_height="wrap_content"  android:gravity="center"  android:paddingTop="6dp"  android:paddingBottom="6dp"  android:background="@drawable/big_button_up"  android:orientation="horizontal"   >   <RadioButton   android:id="@+id/main_tab_addExam"   style="@style/MMTabButton1"   android:layout_weight="1.0"   android:checked="true"   android:text="添加考试" />   <RadioButton   android:id="@+id/main_tab_myExam"   style="@style/MMTabButton1"   android:layout_weight="1.0"     android:text="我的考试" />   <RadioButton   android:id="@+id/main_tab_message"   style="@style/MMTabButton1"   android:layout_weight="1.0"   android:text="我的通知" />   <RadioButton   android:id="@+id/main_tab_testing"   style="@style/MMTabButton1"   android:layout_weight="1.0"   android:text="测试" />  <RadioButton   android:id="@+id/main_tab_settings"   style="@style/MMTabButton1"   android:layout_weight="1.0"   android:text="设置" />  </RadioGroup>   </LinearLayout>   <LinearLayout  android:id="@+id/container"  android:layout_width="fill_parent"  android:layout_height="fill_parent"  android:layout_weight="1" >  </LinearLayout> </LinearLayout> 

import android.app.ActivityGroup; import android.app.AlertDialog; import android.app.LocalActivityManager; import android.content.Context; import android.content.DialogInterface; import android.content.Intent; import android.os.Bundle; import android.view.KeyEvent; import android.view.View; import android.view.animation.Animation; import android.view.animation.AnimationUtils; import android.widget.Button; import android.widget.LinearLayout; import android.widget.RadioGroup; import android.widget.TextView; import android.widget.RadioGroup.OnCheckedChangeListener;  public class AddExamActivity extends ActivityGroup {   protected Button btn_leftTop, btn_rightTop;  protected TextView tv_head;   private static LocalActivityManager manager;  private RadioGroup radioGroup;  private static LinearLayout container;  public static Context context;   @Override  protected void onCreate(Bundle savedInstanceState) {  // TODO Auto-generated method stub  super.onCreate(savedInstanceState);  setContentView(R.layout.addexam);  context=this;  initHead();   manager=getLocalActivityManager();  container= (LinearLayout)findViewById(R.id.container);  radioGroup=(RadioGroup) this.findViewById(R.id.add_tab_group);   container.removeAllViews();  container.addView(manager.startActivity(  "PAGE_0",  new Intent(context, MyExamActivity.class).addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP))  .getDecorView());   radioGroup.setOnCheckedChangeListener(new OnCheckedChangeListener() {   @Override  public void onCheckedChanged(RadioGroup group, int checkedId) {  // TODO Auto-generated method stub  switch (checkedId) {  case R.id.main_tab_addExam://添加考试   container.removeAllViews();   container.addView(manager.startActivity(   "PAGE_0",   new Intent(context, MyExamActivity.class).addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP))   .getDecorView());   break;  case R.id.main_tab_myExam://我的考试   container.removeAllViews();   container.addView(manager.startActivity(   "PAGE_1",   new Intent(context, MyMessageActivity.class).addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP))   .getDecorView());   break;  case R.id.main_tab_message://我的通知   container.removeAllViews();   container.addView(manager.startActivity(   "PAGE_2",   new Intent(context, SettingActivity.class).addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP))   .getDecorView());   break;  case R.id.main_tab_testing://测试   container.removeAllViews();   container.addView(manager.startActivity(   "PAGE_3",   new Intent(context, TestingActivity.class).addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP))   .getDecorView());   break;  case R.id.main_tab_settings://设置   container.removeAllViews();   container.addView(manager.startActivity(   "PAGE_4",   new Intent(context, MyExamActivity.class).addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP))   .getDecorView());   break;  default:   //tabHost.setCurrentTabByTag("我的考试");   break;  }  }  });  }  public static void changeTo(){  Animation slideLeftIn = AnimationUtils.loadAnimation(context, R.anim.slide_bottom_in_no_alpha);   container.removeAllViews();  container.addView(manager.startActivity(  "PAGE_4",  new Intent(context, MyExamActivity.class).addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP))  .getDecorView());  container.startAnimation(slideLeftIn);  }  protected void initHead() {  btn_leftTop = (Button) findViewById(R.id.btn_leftTop);  btn_rightTop = (Button) findViewById(R.id.btn_rightTop);  tv_head = (TextView) findViewById(R.id.tv_head);   btn_leftTop.setVisibility(View.INVISIBLE);  tv_head.setText("添加考试");  }   @Override  public boolean onKeyDown(int keyCode, KeyEvent event) {  // TODO Auto-generated method stub   if (keyCode == KeyEvent.KEYCODE_BACK) {   AlertDialog.Builder builder = new AlertDialog.Builder(getParent());  builder.setMessage("你确定退出吗？")   .setCancelable(false)   .setPositiveButton("确定",   new DialogInterface.OnClickListener() {   public void onClick(DialogInterface dialog,    int id) {    finish();    System.exit(0);   }   })   .setNegativeButton("返回",   new DialogInterface.OnClickListener() {   public void onClick(DialogInterface dialog,    int id) {    dialog.cancel();   }   });  AlertDialog alert = builder.create();  alert.show();  return true;  }   return super.onKeyDown(keyCode, event);  } }