ViewPager加载Activity-白红宇

ViewPager加载Activity
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发布时间：2019-06-08
本文共 11212 字，大约阅读时间需要 37 分钟。
1 package com.hengxun.moblietoken;  2   3 import java.util.ArrayList;  4 import java.util.List;  5 import com.hengxun.moblietoken.dao.Dao;  6 import com.hengxun.update.UpdateManager;  7   8 import android.R.color;  9 import android.app.Activity; 10 import android.app.AlertDialog; 11 import android.app.LocalActivityManager; 12 import android.content.Context; 13 import android.content.DialogInterface; 14 import android.content.Intent; 15 import android.os.Bundle; 16 import android.os.Parcelable; 17 import android.support.v4.view.PagerAdapter; 18 import android.support.v4.view.ViewPager; 19 import android.support.v4.view.ViewPager.OnPageChangeListener; 20 import android.view.Gravity; 21 import android.view.KeyEvent; 22 import android.view.LayoutInflater; 23 import android.view.View; 24 import android.view.Window; 25 import android.widget.RelativeLayout; 26 import android.widget.TabHost; 27 import android.widget.TabHost.OnTabChangeListener; 28 import android.widget.TextView; 29  30 /** 31  *  32  * @author veandy 33  * @version 1.0.0 34  * @2012-5-31 下午2:02:15 35  *  36  */ 37 public class ViewPagerActivity extends Activity { 38  39     /* list集合 */ 40     List
     
       listViews; 41     /* 上下文对象 */ 42     Context context = null; 43     /* Activity对象 */ 44     LocalActivityManager manager = null; 45     /* 选项卡对象 */ 46     TabHost tabHost = null; 47     /* Viewpager...这个不会翻译 */ 48     private ViewPager pager = null; 49  50     @Override 51     protected void onCreate(Bundle savedInstanceState) { 52         super.onCreate(savedInstanceState); 53         requestWindowFeature(Window.FEATURE_NO_TITLE); 54         setContentView(R.layout.activity_view_pager); 55  56         context = ViewPagerActivity.this; 57         /* 实例化viewpager */ 58         pager = (ViewPager) findViewById(R.id.viewpager); 59  60         // 定放一个放view的list，用于存放viewPager用到的view 61         listViews = new ArrayList
      
       (); 62  63         manager = new LocalActivityManager(this, true); 64         /* 这个state就是当前Activity的状态参数，就是onCreate(Bundle 65          savedInstanceState)里面这个savedInstanceState*/ 66         manager.dispatchCreate(savedInstanceState); 67  68         Intent i1 = new Intent(context, Token.class); 69         listViews.add(getView("A", i1)); 70         Intent i2 = new Intent(context, PlatformHelperActivity.class); 71         listViews.add(getView("B", i2)); 72         Intent i3 = new Intent(context, SystemActivity.class); 73         listViews.add(getView("C", i3)); 74  75         tabHost = (TabHost) findViewById(R.id.tabhost); 76         tabHost.setup(); 77         tabHost.setup(manager); 78  79         // 这儿主要是自定义一下tabhost中的tab的样式 80         RelativeLayout tabIndicator1 = (RelativeLayout) LayoutInflater.from( 81                 this).inflate(R.layout.tabwidget, null); 82         final TextView tvTab1 = (TextView) tabIndicator1 83                 .findViewById(R.id.tv_title); 84         tvTab1.setTextSize(16); 85         tvTab1.setText("密码验证"); 86  87         RelativeLayout tabIndicator2 = (RelativeLayout) LayoutInflater.from( 88                 this).inflate(R.layout.tabwidget, null); 89         final TextView tvTab2 = (TextView) tabIndicator2 90                 .findViewById(R.id.tv_title); 91         tvTab2.setTextSize(16); 92         tvTab2.setText("平台助手"); 93  94         RelativeLayout tabIndicator3 = (RelativeLayout) LayoutInflater.from( 95                 this).inflate(R.layout.tabwidget, null); 96         final TextView tvTab3 = (TextView) tabIndicator3 97                 .findViewById(R.id.tv_title); 98         tvTab3.setTextSize(16); 99         tvTab3.setText("设置");100 101         Intent intent = new Intent(context, TestActivity.class);102         // 注意这儿Intent中的activity不能是自身103         // 比如“A”对应的是T1Activity，后面intent就new的T3Activity的。104         tabHost.addTab(tabHost.newTabSpec("A").setIndicator(tabIndicator1)105                 .setContent(intent));106         tabHost.addTab(tabHost.newTabSpec("B").setIndicator(tabIndicator2)107                 .setContent(intent));108         tabHost.addTab(tabHost.newTabSpec("C").setIndicator(tabIndicator3)109                 .setContent(intent));110 111         pager.setAdapter(new MyPageAdapter(listViews));112 113         tvTab1.setBackgroundDrawable(getResources().getDrawable(114                 R.drawable.button));115         tvTab1.setTextColor(getResources().getColor(color.black));116         tvTab1.setGravity(Gravity.CENTER);117         tvTab2.setGravity(Gravity.CENTER);118         tvTab3.setGravity(Gravity.CENTER);119 120         UpdateManager manager1 = new UpdateManager(this);121         manager1.checkUpdate();122 123         pager.setOnPageChangeListener(new OnPageChangeListener() {124             public void onPageSelected(int position) {125                 // 当viewPager发生改变时，同时改变tabhost上面的currentTab126                 tabHost.setCurrentTab(position);127                 switch (position) {128                 case 0:129 130                     tvTab1.setBackgroundDrawable(getResources().getDrawable(131                             R.drawable.button));132                     tvTab1.setTextColor(getResources().getColor(color.black));133                     tvTab1.setGravity(Gravity.CENTER);134                     tvTab2.setTextColor(getResources().getColor(color.white));135                     tvTab3.setTextColor(getResources().getColor(color.white));136                     tvTab2.setBackgroundColor(000000);137                     tvTab3.setBackgroundColor(000000);138                     break;139                 case 1:140                     tvTab2.setBackgroundDrawable(getResources().getDrawable(141                             R.drawable.button));142                     tvTab2.setTextColor(getResources().getColor(color.black));143                     tvTab2.setGravity(Gravity.CENTER);144                     tvTab1.setTextColor(getResources().getColor(color.white));145                     tvTab3.setTextColor(getResources().getColor(color.white));146                     tvTab1.setBackgroundColor(000000);147                     tvTab3.setBackgroundColor(000000);148 149                     break;150                 case 2:151 152                     tvTab3.setBackgroundDrawable(getResources().getDrawable(153                             R.drawable.button));154                     tvTab3.setTextColor(getResources().getColor(color.black));155                     tvTab3.setGravity(Gravity.CENTER);156                     tvTab2.setTextColor(getResources().getColor(color.white));157                     tvTab1.setTextColor(getResources().getColor(color.white));158                     tvTab1.setBackgroundColor(000000);159                     tvTab2.setBackgroundColor(000000);160 161                     break;162 163                 default:164                     break;165                 }166 167             }168 169             public void onPageScrolled(int arg0, float arg1, int arg2) {170             }171 172             public void onPageScrollStateChanged(int arg0) {173             }174         });175 176         // 点击tabhost中的tab时，要切换下面的viewPager177         tabHost.setOnTabChangedListener(new OnTabChangeListener() {178             public void onTabChanged(String tabId) {179 180                 if ("A".equals(tabId)) {181                     pager.setCurrentItem(0);182                 }183                 if ("B".equals(tabId)) {184 185                     pager.setCurrentItem(1);186                 }187                 if ("C".equals(tabId)) {188                     pager.setCurrentItem(2);189                 }190             }191         });192 193     }194 195     /**196      * 退后键的监听197      */198     @Override199     public boolean onKeyDown(int keyCode, KeyEvent event) {200         switch (keyCode) {201         case KeyEvent.KEYCODE_BACK:202             AlertDialog.Builder build = new AlertDialog.Builder(this);203             build.setTitle("注意")204                     .setMessage("关键时刻你确定要退出吗？")205                     .setPositiveButton("确定",206                             new DialogInterface.OnClickListener() {207                                 /**208                                  * 用户点击确定后马上finish209                                  */210                                 @Override211                                 public void onClick(DialogInterface dialog,212                                         int which) {213                                     // Thread.interrupted();214                                     finish();215 216                                 }217                             })218                     .setNegativeButton("取消",219                             new DialogInterface.OnClickListener() {220                                 /**221                                  * 用户点击取消不做任何动作222                                  */223                                 @Override224                                 public void onClick(DialogInterface dialog,225                                         int which) {226 227                                 }228                             }).show();229             break;230 231         default:232             break;233         }234         return false;235 236         // return super.onKeyDown(keyCode, event);237 238     }239 240     @Override241     protected void onDestroy() {242         super.onDestroy();243         ((Dao) this.getApplication()).setBeginForWhile(false);244         ((Dao) this.getApplication()).setBegin(false);245         System.out.println(((Dao) this.getApplication()).isBeginForWhile());246 247     }248 249     private View getView(String id, Intent intent) {250         return manager.startActivity(id, intent).getDecorView();251     }252 253     private class MyPageAdapter extends PagerAdapter {254 255         private List
       
         list;256 257         private MyPageAdapter(List
        
          list) {258             this.list = list;259         }260 261         @Override262         public void destroyItem(View view, int position, Object arg2) {263             ViewPager pViewPager = ((ViewPager) view);264             pViewPager.removeView(list.get(position));265         }266 267         @Override268         public void finishUpdate(View arg0) {269         }270 271         @Override272         public int getCount() {273             return list.size();274         }275 276         @Override277         public Object instantiateItem(View view, int position) {278             ViewPager pViewPager = ((ViewPager) view);279             pViewPager.addView(list.get(position));280             return list.get(position);281         }282 283         @Override284         public boolean isViewFromObject(View arg0, Object arg1) {285             return arg0 == arg1;286         }287 288         @Override289         public void restoreState(Parcelable arg0, ClassLoader arg1) {290         }291 292         @Override293         public Parcelable saveState() {294             return null;295         }296 297         @Override298         public void startUpdate(View arg0) {299         }300 301     }302 303 }