Android Launcher app list for mobile phone installation

The main thing in launcher is to get the portals and icons for all the app lists, and there are two ways to get them:

PackageInfo

ResolveInfo

Run get launcher of all apps and allow click events to go to the app

The following two methods are used to obtain a list of all apps:

Establish basic data:

Pakagemod.java

public class Pakagemod {public String pakagename;public string appname;public drawable icon;public pakagemod () {super ();} Public Pakagemod (String pakagename, String appName, drawable icon) {super (); this.pakagename = Pakagename;this.appname = A Ppname;this.icon = icon;}}

To build the adapter:

public class Demogridadapter extends Baseadapter {private layoutinflater inflater;private list<pakagemod> datas; Public Demogridadapter (context context, list<pakagemod> datas) {super (); inflater = Layoutinflater.from (context) ; this.datas = datas;} @Overridepublic int GetCount () {return datas.size ();} @Overridepublic Object getItem (int position) {return null;} @Overridepublic long Getitemid (int position) {return position;}  @Overridepublic view GetView (int position, view Convertview, ViewGroup parent) {Viewholder holder;if (Convertview = = null) {//Using the view's object Itemview associated with R.layout.item Convertview = inflater.inflate (R.layout.apps, null); holder = new Viewholder (); Holder.icon = (ImageView) Convertview.findviewbyid (r.id.apps_image); Holder.label = (TextView) Convertview.findviewbyid (R.id.apps_textview); Convertview.settag (holder);} else {holder = (Viewholder) Convertview.gettag ();} Holder.icon.setImageDrawable (Datas.get (position). icon); Holder.label.setText (Datas.get (position). AppName); Return COnvertview;} Class Viewholder {private ImageView icon;private TextView label;}}

To create a view of the adapter:

<?xml version= "1.0" encoding= "Utf-8"? ><linearlayout xmlns:android= "http://schemas.android.com/apk/res/ Android "    android:layout_width=" fill_parent "    android:layout_height=" fill_parent "    android:gravity=" Center "    android:orientation=" vertical ">    <imageview        android:id=" @+id/apps_image "        android: Layout_width= "48dip"        android:layout_height= "48dip"        android:icon= "@drawable/ic_launcher"/>    < TextView        android:id= "@+id/apps_textview"        android:layout_width= "wrap_content"        android:layout_ height= "Wrap_content"        android:maxems= "5"        android:maxlines= "1"        android:text= "good"/></ Linearlayout>

Below the activity to get a list and display to the GridView, and click into the app;

Using PackageInfo

public class Packageinfodemo extends Activity {private GridView gridview;private Packagemanager pmanager;private List <PakageMod> datas;private String tag = "mainactivity"; @Overrideprotected void OnCreate (Bundle savedinstancestate {super.oncreate (savedinstancestate); This.setcontentview (r.layout.activity_main);//Acquired Gridviewgridview = ( GridView) Findviewbyid (R.id.gridview);//Get picture, application name, package name Pmanager = PackageInfoDemo.this.getPackageManager (); list<packageinfo> applist = Getallapps (packageinfodemo.this);d atas = new arraylist<pakagemod> (); for (int i = 0; I < applist.size (); i++) {PackageInfo pinfo = Applist.get (i); Pakagemod Shareitem = new Pakagemod ();//Set Picture Shareitem.icon = Pmanager.getapplicationicon (pinfo.applicationinfo);// Set Application Name Shareitem.appname = Pmanager.getapplicationlabel (pinfo.applicationinfo). toString ();// Set the application's package name Shareitem.pakagename = Pinfo.applicationinfo.packagename;datas.add (Shareitem);} Gridview.setadapter (New Baseadapter (this, datas));//Click Apply icon to respond to GRIDview.setonitemclicklistener (New Clicklistener ());} public static list<packageinfo> Getallapps (context context) {list<packageinfo> apps = new arraylist< Packageinfo> (); Packagemanager Pmanager = Context.getpackagemanager ();//Get all apps in the phone list<packageinfo> packlist = Pmanager.getinstalledpackages (0); for (int i = 0; i < packlist.size (); i++) {PackageInfo Pak = (packageinfo) packlist.ge T (i);//If the value in the IF () <=0 is a program of its own, otherwise systems engineering comes with if ((Pak.applicationInfo.flags & Pak.applicationInfo.FLAG_SYSTEM) < = 0) {//Add your own installed applications//Apps.add (PAK);} Apps.add (Pak);} return apps;} Private class Clicklistener implements Onitemclicklistener {@Overridepublic void Onitemclick (adapterview<?> arg0 , View arg1, int position,long arg3) {Intent Intent = new Intent (); Intent = PackageInfoDemo.this.getPackageManager (). Getla Unchintentforpackage (Datas.get (position) pakagename); startactivity (intent);}}

Using Resolveinfo

public class Resolveinfodemo extends Activity {private GridView gridview;private Packagemanager pmanager;private List <PakageMod> datas;private String tag = "Resolveinfodemo"; @Overrideprotected void OnCreate (Bundle Savedinstancestate) {//TODO auto-generated method Stubsuper.oncreate (savedinstancestate); This.setcontentview ( R.layout.activity_main);//Get Gridviewgridview = (GridView) Findviewbyid (R.id.gridview);//Get picture, application name, package name Pmanager = This.getpackagemanager ();d atas = new Getallapps (this). Getdatas (); Gridview.setadapter (New Demogridadapter datas)); Gridview.setonitemclicklistener (new Clicklistener ());} When the user taps the application icon, the class responds with the private class Clicklistener implements Onitemclicklistener {@Overridepublic void Onitemclick ( Adapterview<?> Adapterview, view view, int arg2,long arg3) {Intent Intent = new Intent (); Intent = Getpackagemanager ( ). Getlaunchintentforpackage (Datas.get (arg2). Pakagename); startactivity (intent);}}

Getallapps.java

public class Getallapps {private Context mcontext;private packagemanager packagemanager;private int micondpi;private String tag = "Getallapps";p rivate list<pakagemod> datas = new arraylist<pakagemod> ();p ublic Getallapps ( Context mcontext) {this.mcontext = Mcontext; Activitymanager Activitymanager = (activitymanager) mcontext.getsystemservice (context.activity_service);p AC Kagemanager = Mcontext.getpackagemanager (); micondpi = Activitymanager.getlauncherlargeicondensity ();} public void Loadallappsbybatch () {list<resolveinfo> apps = null;intent mainintent = new Intent (Intent.action_main, NULL); Mainintent.addcategory (intent.category_launcher); apps = Packagemanager.queryintentactivities (mainIntent, 0) ; for (int i = 0; i < apps.size (); i++) {String PackageName = Apps.get (i). ActivityInfo.applicationInfo.packageName; String title = Apps.get (i). Loadlabel (Packagemanager). toString ();D rawable icon = null;if (title = = null) {title = Apps.get ( i). Activityinfo.name;} ActivitYinfo info = apps.get (i). Activityinfo;icon = Getfullresicon (info);d Atas.add (New Pakagemod (Packagename,title,icon));}}        Public drawable Getfullresicon (activityinfo info) {Resources resources;        try {resources = packagemanager.getresourcesforapplication (Info.applicationinfo);        } catch (Packagemanager.namenotfoundexception e) {resources = null;                        } if (resources! = null) {int iconid = Info.geticonresource ();            if (iconID! = 0) {return Getfullresicon (resources, iconID);    }} return Getfullresdefaultactivityicon (); }public drawable Getfullresdefaultactivityicon () {return Getfullresicon (Resources.getsystem (), Android Oid.    R.mipmap.sym_def_app_icon);        }public drawable Getfullresicon (resources resources, int iconid) {drawable D; try {//requires API level (current min is): D = resources.gEtdrawablefordensity (iconID, micondpi);        } catch (Resources.notfoundexception e) {d = null; } return (d! = null)?    D:getfullresdefaultactivityicon (); }public list<pakagemod> Getdatas () {loadallappsbybatch (); return datas;}}

Here getdrawablefordensity need to be 15 version of the SDK support, all the lower version of the launcher can not be used;

Neither of the two methods used in this blog post requires any permissions to be configured;

Android4.2 launcher in the use of Resolveinfo to obtain the application list, where the Resolveinfo of the demo is also copied from the launcher source;

Maybe there's a 3rd way .... adjourned

This article is from the CSDN blog, reprint please contact the author;
Annotated source http://blog.csdn.net/dreamintheworld/article/details/39718581

Android Launcher app list for mobile phone installation