Android implementation software list Click to start another program function "with demo source download" _android

This article describes the Android implementation of the list of software click to start another program function. Share to everyone for your reference, specific as follows:

There is a feature in many of the software currently available: Which software is installed in the device, which they will show to the user in the form of a list of software.

Today we are going to implement this feature:

operating Environment: Motorola defy+ System 2.3.6

main API: Packageinfo,packagemanager,layoutinflater,applicationinfo

Packagemanger class , its primary responsibility is to manage the application package. Through it, we can get the application information

Obtain application-related information through Packagemanager, and then display the appropriate information through ListView.

Directly on the main code.

public class Applistview extends LinearLayout implements onitemclicklistener{private final static String TAG = "Applis
  Tview ";
  Private ListView Mlistview;
  Private TextView Mtvtitle;
  Private list<appinfo> mapplist;
  Private context Mcontext;
  Private Layoutinflater Minflater;
  Private Packagemanager Mpacmanager;
    Public Applistview (context, AttributeSet attrs) {Super (context, attrs);
  Init (context);
    Public Applistview (context, AttributeSet attrs, int defstyle) {Super (context, attrs, Defstyle);
  Init (context);
    Public Applistview {Super (context);
  Init (context);
    private void init (context c) {mcontext = C;
    Minflater = (layoutinflater) c.getsystemservice (Context.layout_inflater_service);
    This.addview (Minflater.inflate (R.layout.activity_main,null,false));
    Mlistview = (ListView) This.findviewbyid (R.id.listview);
   Mtvtitle = (TextView) This.findviewbyid (r.id.title); Loadappdata ();
    Mlistview.setadapter (New Myadapter (c));
    Mlistview.setonitemclicklistener (this);
  LOG.D (TAG, "altogether" +mapplist.size ());
    //load application software data software name, package name, corresponding icon, etc. private void loadappdata () {if (mapplist!= null) {mapplist.clear ();
    }else{mapplist = new arraylist<appinfo> ();
    } Mpacmanager = Mcontext.getpackagemanager ();
    list<packageinfo> packages = mpacmanager.getinstalledpackages (0);
      for (int i=0; i<packages.size (); i++) {PackageInfo pi = packages.get (i);
      AppInfo ai = new AppInfo ();
      Ai.packagename = Pi.packagename;
      Ai.appname = Pi.applicationInfo.loadLabel (Mpacmanager). toString ();
      Ai.appicon = Pi.applicationInfo.loadIcon (Mpacmanager);
    Mapplist.add (AI);
  Mtvtitle.settext ("Total number of software installed on this machine:" +packages.size () + ""); 
    ///For ListView Custom Adapter class Myadapter extends Baseadapter {public myadapter (context c) {mcontext = C; @Override public int GetCount () {
      return mapplist = = Null?0:mapplist.size ();
    @Override public Object getitem (int arg0) {return mapplist = = Null?null:mapplist.get (arg0);
    @Override public long Getitemid (int arg0) {return arg0;
      @Override public view GetView (int arg0, view arg1, ViewGroup arg2) {view view;
      if (arg1 = = null) {view = Minflater.inflate (R.layout.app_list_item, NULL);
      }else{view = arg1;
      AppInfo ai = (AppInfo) getitem (arg0);
      ImageView AppIcon = (imageview) View.findviewbyid (R.id.appicon);
      TextView appName = (TextView) View.findviewbyid (r.id.appname);
      TextView apppackage = (TextView) View.findviewbyid (r.id.apppackage);
      Appicon.setimagedrawable (Ai.appicon);
      Appname.settext (Ai.appname);
      Apppackage.settext (Ai.packagename);
    return view; }///Handle ListView Item's Click Action, I am here to launch the application @Override public void Onitemclick (adapterview<?> arg0, View arg1, in T arg2, Long Arg3) {Toast.maketext (Mcontext, arg2+ "", Toast.length_short). Show ();
    Gets the package name for this item String packname = Mapplist.get (arg2). PackageName;
    Start this program Intent Intent = Mpacmanager.getlaunchintentforpackage (packname);
  Mcontext.startactivity (Intent);
    }//Software carrier public class AppInfo {//software name public String appname= "";
    Package name public String packagename= "";
  Software icon Public drawable appicon=null;

 }
}

Public abstract Intent Getlaunchintentforpackage (String packagename)

This method returns a Intent through the package name and then launches the application via StartActivity (Intent)

Full Instance code click here Download the site .

The following is a diagram of how the program works:

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I hope this article will help you with the Android program.