6.1 程序管理器的界面展现

 

public class AppManagerActivity extends Activity {

      protected static final String TAG = "AppManagerActivity";

      private TextView  tv_avail_rom;

      private TextView   tv_avail_sd;

      private ListView   lv_app_manage;

      

      private LinearLayout  loading;

      private List<AppInfoBean> appInfoList;

      private MyAdapter adapter;

      

      private Handler  handler= new Handler(){

             public void handleMessage(android.os.Message msg) {

                  Log. i(TAG, "进入handler..." );

                   loading.setVisibility(View. GONE);  //移除loading

                   lv_app_manage.setAdapter( new MyAdapter());

            Log. i(TAG, "填充" );

                  

            };

            

      };

      

      

     @Override

    protected void onCreate(Bundle savedInstanceState) {

      super.onCreate(savedInstanceState);

       setContentView(R.layout. activity_app_manage);

      

       //找到关心的控件

       tv_avail_rom=(TextView) findViewById(R.id. tv_avail_rom);

       tv_avail_sd=(TextView) findViewById(R.id. tv_avail_sd);

       lv_app_manage=(ListView) findViewById(R.id. lv_app_manage);

       loading=(LinearLayout) findViewById(R.id. loading);

   

       //给TextView设置值

       tv_avail_rom.setText( "内存可用空间:" +getAvailableSpace(Environment.getDataDirectory ().getAbsolutePath()));

       tv_avail_sd.setText("SD卡可用空间:"+getAvailableSpace(Environment. getExternalStorageDirectory().getAbsolutePath()));

    

      // appInfoList=new ArrayList<AppInfoBean>();

      

      

      //填充数据到集合

      fillDateToLIst();

      

     }

    

    

    /**

     * 填充数据到集合的方法

     */

   public void   fillDateToLIst(){

        loading.setVisibility(View. VISIBLE);  //loading可见

         new Thread(){

              

             public void run() {

                   appInfoList = AppManager.getAppInfo(AppManagerActivity. this);

                   Log. i(TAG, "集合的大小:" +appInfoList .size());

                   handler.sendEmptyMessage(0);

             };

              

              

         }.start();

        

   }

  

 

   /**

    * 创建适配器

    */

   public class  MyAdapter extends BaseAdapter{

      @Override

      public int getCount() {

      

             return appInfoList.size();

      }

      

      

      @Override

      public View getView( int position, View convertView, ViewGroup parent) {

             View view= null;

             ViewHolder holder;

             if(convertView!= null&& convertView instanceof RelativeLayout){   //复用历史view

                  view=convertView;

                holder=(ViewHolder) view.getTag();   //复用孩子的id

            } else{      //创建新的view

                  

                  Log. i(TAG, "创建信息的item" );

                  view=View. inflate(getApplicationContext(), R.layout.list_app_item, null );

                  

                  holder= new ViewHolder();   //初始化静态类中控件,找到关心的控件

                  holder. iv_appicon=(ImageView) view.findViewById(R.id.iv_appicon );

                holder. tv_appname=(TextView) view.findViewById(R.id.tv_appname );

                  holder. tv_installlocation=(TextView)view.findViewById(R.id.tv_installlocation );

                  

                   view.setTag(holder);   //将holder追加到view上

           }

            

            

            

        AppInfoBean   appInfoBean = appInfoList.get(position);

        holder. iv_appicon.setImageDrawable(appInfoBean.getIcon());

        holder. tv_appname.setText(appInfoBean.getAppName());

      

            if( appInfoBean.isRoomApp()){

                  

                   holder. tv_installlocation.setText( "存储位置:内存" );

                  

                 } else{

                   holder. tv_installlocation.setText( "存储位置:外部存储" );

                  

                 }     

        

            

            

            

            

             return view;

      }

      

      

      @Override

      public Object getItem( int position) {

      

             return null;

      }

      @Override

      public long getItemId( int position) {

            

             return 0;

      }

        

   }

  

  

  

   /**

    * 创建静态来初始化条目中的控件

    */

   static class ViewHolder{

        

         ImageView  iv_appicon;

         TextView tv_appname;

         TextView  tv_installlocation;

   }

  

      /**

       * 获取某个目录的大小

       * @param path

       * @return

       */

      public String getAvailableSpace(String path){

            StatFs statf = new StatFs(path);

             long size = statf. getAvailableBlocks()*statf. getBlockSize();

             return Formatter. formatFileSize(this, size);

      }

    

   

    

}