2

在我的应用程序中,我必须在列表视图中列出已安装的应用程序。应用程序在后台线程中获取已安装的应用程序。要求是即使未完成获取也希望填充列表。也就是说,如果 arraylist 中有一个条目,则显示带有该项目的 arraylist。这可能吗?请帮助我。在此先感谢

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3 回答 3

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首先,这只有在您使用循环在后台处理应用程序数据时才有可能。一篇大纲:

保存 App 信息的类:

Class AppData {
  public final Drawable icon;
  public final String   name;

  public AppData(Drawable i, String n){
     this.icon = i;
     this.name = n;
  }    
}

AsynckTask 搜索应用程序:

AsyncTask<Void,AppData,Void> scanAppsTask = new AsyncTask<Void,AppData,Void>{

  @Override
  public Void doInBackground(Void... args){

     //--get list---
     List<ApplicationInfo> apps = mPm.getInstalledApplications(
            PackageManager.GET_UNINSTALLED_PACKAGES |
            PackageManager.GET_DISABLED_COMPONENTS);

     //--run a loop--
     for(ApplicationInfo appInfo : apps){

       AppData newFound;

       //---find app details, load app icon etc---

       publishProgress(newFound);

     }

     //---done---
     return null;
  }

  @Override
  public void onProgressUpdate(AppData... data){
    //---update list for every app found----
    myListAdapter.add(data[0]);
    myListAdapter.notifyDataSetChanged();
  }
}

scanAppsTask.execute();
于 2012-11-14T08:27:52.563 回答
1

您可以动态地向/从适配器添加/删除项目ListView,所以是的,一旦有新项目可用,您就可以从后台线程中一个一个地填充项目列表。

于 2012-11-14T07:57:56.667 回答
1

我正在开发一个类似的应用程序,我需要获取所有已安装的应用程序,甚至是内置应用程序。我用下面的代码做到了这一点,

TextView data;
    ImageView image1;
    LinearLayout holdlayout;
    View l1;
    private ArrayList results = new ArrayList();
    List<ResolveInfo> list;
    TextView result;
    String str="";
    Drawable icon;
      @Override
      public void onCreate(Bundle savedInstanceState) 
      {
          super.onCreate(savedInstanceState);
            setContentView(R.layout.main);
            l1 = findViewById(R.id.Layout1);
        PackageManager pm = this.getPackageManager();
        Intent intent = new Intent(Intent.ACTION_MAIN, null);
        intent.addCategory(Intent.CATEGORY_LAUNCHER);
        list = pm.queryIntentActivities(intent, PackageManager.PERMISSION_GRANTED);
        for (ResolveInfo rInfo : list)
        {
            str = rInfo.activityInfo.applicationInfo.loadLabel(pm).toString() + "\n";
           results.add(rInfo.activityInfo.applicationInfo.loadLabel(pm).toString());
           Log.w("Installed Applications", rInfo.activityInfo.applicationInfo.loadLabel(pm).toString());
           icon =  rInfo.activityInfo.applicationInfo.loadIcon(pm);
           holdlayout = new LinearLayout(getApplicationContext());
            holdlayout.setOrientation(LinearLayout.HORIZONTAL);
            data = new TextView(getApplicationContext());
            data.setText(str);
            image1 = new ImageView(getApplicationContext());
            image1.setBackgroundDrawable(icon);
            ((ViewGroup) holdlayout).addView(image1);
            ((ViewGroup) holdlayout).addView(data);
            ((ViewGroup) l1).addView(holdlayout);

        }
      }

如果您对此代码有任何问题,请告诉我。

于 2012-11-14T07:49:58.153 回答