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   源码介绍

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软件管理器类似于Windows下控制面板中的程序卸载功能，它可以实现对本机中的软件进行集中管理。通过软件管理器，我们可以实现查看已安装软件的详细信息、启动和卸载软件等功能。

从用户实际使用需求出发，基于Android平台的软件管理器，主要实现的功能有：

1)        以列表视图或网格视图显示用户程序或者所有程序；

2)        启动程序

3)        查看程序详细信息

4)        卸载程序

 

  /**
     * ItemClick的处理
     */
 @Override
 public void onItemClick(AdapterView<?> arg0, View arg1, int position, long arg3) { 
  final PackageInfo tempPkInfo = showPackageInfo.get(position);
  
  AlertDialog.Builder builder = new AlertDialog.Builder(this);
  builder.setTitle("选项");
  builder.setItems(R.array.choice, new DialogInterface.OnClickListener(){

   @Override
   public void onClick(DialogInterface dialog, int which) {
    switch(which){
    case 0:
     //start an app
     String packageName = tempPkInfo.packageName;
     ActivityInfo activityInfo = tempPkInfo.activities[0];
     if(activityInfo == null){
      Toast.makeText(MainActivity.this, "程序出错!", Toast.LENGTH_SHORT).show();
      return;
     }
     String activityName = activityInfo.name;
     Intent intent  = new Intent();
     intent.setComponent(new ComponentName(packageName,activityName));
     startActivity(intent);
     break;
    case 1:
     showAppDetail(tempPkInfo);
     break;
    case 2:
     Uri packagUri = Uri.parse("package:"  tempPkInfo.packageName);
     Intent uninstallIntent = new Intent();
     uninstallIntent.setAction(Intent.ACTION_DELETE);
     uninstallIntent.setData(packagUri);

     //StartActivityForResult     
     startActivityForResult(uninstallIntent , 0);
     //Should OVERRIDE onActivityResult()
     break;
    }
    
   } 
   
  });
  builder.setNegativeButton("取消", null);
  builder.create();
  builder.show();
 }
 
 
 /**
  * Activity回传处理
  */
 @Override
 protected void onActivityResult(int requestCode, int resultCode, Intent data) {
  super.onActivityResult(requestCode, resultCode, data);
  packageInfo = getPackageManager().getInstalledPackages(PackageManager.GET_UNINSTALLED_PACKAGES  | PackageManager.GET_ACTIVITIES);
  userPackageInfo = new ArrayList<PackageInfo>();
  for (int i =0;i<packageInfo.size();i ){
   PackageInfo temp = packageInfo.get(i);
   ApplicationInfo appInfo = temp.applicationInfo;
   boolean flag = false;
   //用户安装的程序
   if((appInfo.flags & ApplicationInfo.FLAG_UPDATED_SYSTEM_APP) != 0){
    flag = true;
   }
   else if((appInfo.flags & ApplicationInfo.FLAG_SYSTEM) ==0){
    flag = true;
   }
   if(flag){
    userPackageInfo.add(temp);
   }
  }
  if(allApplication){
   showPackageInfo = packageInfo;
  }
  else{   
   showPackageInfo = userPackageInfo; 
  }
  gv.setAdapter(new GridViewAdapter(MainActivity.this,showPackageInfo));
  lv.setAdapter(new ListViewAdapter(MainActivity.this,showPackageInfo));
 }  

 /**
  *显示程序的详细详细
  */
 private void showAppDetail(PackageInfo packageInfo) {
  AlertDialog.Builder builder = new AlertDialog.Builder(MainActivity.this);
  builder.setTitle("程序详细详细");
  StringBuffer messageDetail = new StringBuffer();
  messageDetail.append("程序名称: " packageInfo.applicationInfo.loadLabel(getPackageManager()));
  messageDetail.append("\n包名: " packageInfo.packageName);
  messageDetail.append("\n版本: " packageInfo.versionName);
  builder.setMessage(messageDetail);
  builder.setIcon(packageInfo.applicationInfo.loadIcon(getPackageManager()));
  builder.setPositiveButton("确定", null);
  builder.create().show();
 }