Learn Android together how to get a list of phone programs and program-related information and start the specified program (26)

：

List of programs:

Start the program and get the program information:

The code is as follows:

Create a appinfo class to represent the application

<pre name= "code" class= "Java" >public class AppInfo {public charsequence title;//program name Public charsequence PackageName; Package name Intent intent;//start intentpublic drawable icon;//program icon/* * Set to start the program intent */final void Setactivity (componentname cla ssname, int launchflags) {intent = new intent (Intent.action_main); intent.addcategory (Intent.category_launcher); Intent.setcomponent (ClassName); Intent.setflags (launchflags);}}

To create an adapter for a list of programs:

/** * Program List Adapter * @author Bill * */public class Showapplistadapter extends Baseadapter {private arraylist<appinfo> app List;private layoutinflater inflater;public showapplistadapter (Context context,arraylist<appinfo> appList, Packagemanager pm) {this.applist = Applist;inflater = Layoutinflater.from (context);} public int GetCount () {return applist.size ();} Public Object getItem (int position) {return applist.get (position);} public long getitemid (int position) {return position;} Public View GetView (int position, View Convertview, ViewGroup parent) {Final AppInfo info = applist.get (position); Viewholder holder = null;if (null = = Convertview) {Convertview = inflater.inflate (R.layout.app_list_item, null); holder = New Viewholder (); holder.lv_image = (ImageView) Convertview.findviewbyid (r.id.lv_icon); holder.lv_name = (TextView) Convertview.findviewbyid (r.id.lv_item_appname); holder.lv_packname = (TextView) Convertview.findviewbyid (R.id.lv_ Item_packageame); Convertview.settag (holder);} else {HoldeR = (viewholder) Convertview.gettag ();} Holder.lv_image.setImageDrawable (Info.icon); final charsequence name = info.title;final charsequence Packname = Info.packagename;holder.lv_name.settext (name); Holder.lv_packname.setText (packname); return convertview;} Private final static class Viewholder{imageview lv_image; TextView Lv_name; TextView lv_packname;}}

public class Mainactivity extends Activity {/* * Application collection */private arraylist<appinfo> appinfos;private ListView lv_ap p;/* * Manages the application package and obtains program information through it */private packagemanager pm; @Overrideprotected void OnCreate (Bundle savedinstancestate) { Super.oncreate (savedinstancestate); Setcontentview (r.layout.app_list);p m = Getpackagemanager (); InitView (); new Thread (runable). Start ();} private void Initview () {Lv_app = (ListView) Findviewbyid (R.id.app_list_view); Lv_app.setonitemclicklistener (new Appdetaillinster ());} Private final Runnable runable = new Runnable () {public void run () {loadapplications (); Myhandler.obtainmessage (). Sendtotarget ();}}; Private Handler MyHandler = new Handler () {@Overridepublic void Handlemessage (Message msg) {lv_app.setadapter (new Showapp ListAdapter (Mainactivity.this,appinfos, PM));}};/ * * Load app list */private void Loadapplications () {Packagemanager manager = This.getpackagemanager (); Intent mainintent = new I Ntent (Intent.action_main, null); Mainintent.addcategory (Intent.category_lauNcher); final list<resolveinfo> apps = manager.queryintentactivities (mainintent, 0); Collections.sort (Apps, New Resolveinfo.displaynamecomparator (manager)), if (apps! = null) {final int count = Apps.size (); if (Appinfos = = null) {Appinfos = new arraylist<appinfo> (count);} Appinfos.clear (); for (int i = 0; i < count; i++) {AppInfo application = new AppInfo (); ResolveInfo info = apps.get (i); application.title = Info.loadlabel (manager); Application.setactivity (New componentname (Info.activityinfo.applicationinfo.packagename,info.activityinfo.name), intent.flag_activity_new_task| intent.flag_activity_reset_task_if_needed); Application.icon = Info.activityInfo.loadIcon (manager); Application.packagename = Info.activityinfo.applicationinfo.packagename;appinfos.add (application);}} /** * List Listener class * @author Bill * */public final class Appdetaillinster implements Onitemclicklistener {Alertdialog Dialog;publ IC void Onitemclick (adapterview<?> view, view arg1,final int position, long Arg3) {AlErtdialog.builder Builder = new Alertdialog.builder (mainactivity.this); Builder.settitle ("Options"); Builder.setitems ( R.array.choice, New Onclicklistener () {public void OnClick (Dialoginterface dialog, int which) {final AppInfo AppInfo = App  Infos.get (position); switch (which) {case 0://Start program try {startApp (appInfo);} catch (Exception e) {}break;case 1://Details try {Showappdetail (appInfo);} catch (Exception e) {}break;} Dialog.dismiss ();} private void Showappdetail (AppInfo AppInfo) throws Exception {final String packname = appInfo.packageName.toString (); Final PackageInfo packinfo = Getapppackinfo (packname); final String versionname = packinfo.versionname;final String[] Apppremissions = packinfo.requestedpermissions;final String appName = appInfo.title.toString (); Intent Showdetailintent = new Intent (mainactivity.this,showappdetailactivity.class); Bundle bundle = new Bundle (), bundle.putstring ("PackageName", Packname), bundle.putstring ("appversion", versionname); Bundle.putstringarray ("Apppremissions", APPPremissions); Bundle.putstring ("appname", appname); Showdetailintent.putextras (bundle); StartActivity ( showdetailintent);} private void StartApp (AppInfo AppInfo) throws Exception {final String packname = appInfo.packageName.toString (); final String activityname = Getactivityname (Packname), if (null = = Activityname) {toast.maketext (mainactivity.this, "program cannot Start", Toast.length_short); return;} Intent Intent = new Intent () intent.setcomponent (new ComponentName (Packname,activityname)); startactivity (Intent);}); Dialog = Builder.create ();d ialog.show ();}} /** * Get program information * @param packname * @return * @throws Exception */public packageinfo getapppackinfo (String packname) throws E Xception {return Pm.getpackageinfo (Packname, packagemanager.get_activities| packagemanager.get_permissions);} /** * Get activity to start related programs * @param packname * @return * @throws Exception */public string getactivityname (string packname) t Hrows Exception {final PackageInfo packinfo = Pm.getpackageinfo (packname,packagemanager.get_activities); FinaL activityinfo[] Activitys = packinfo.activities;if (Null = = Activitys | | activitys.length <= 0) {return null;} return activitys[0].name;}}

App_list.xml:

<?xml version= "1.0" encoding= "Utf-8"? ><relativelayout xmlns:android= "http://schemas.android.com/apk/res/ Android "    android:layout_width=" fill_parent "    android:layout_height=" fill_parent "    android:o rientation= "vertical"    android:background= "@android: Color/black" >    <listview android:id=        "@+id/ App_list_view "        android:layout_width=" fill_parent "        android:layout_height=" fill_parent "      >    </ListView></RelativeLayout>

App_list_item.xml:

<?xml version= "1.0" encoding= "Utf-8"? ><linearlayout xmlns:android= "http://schemas.android.com/apk/res/ Android "android:orientation=" horizontal "android:layout_width=" Fill_parent "android:layout_height=" Wrap_content " Android:gravity= "center_vertical" ><imageviewandroid:id= "@+id/lv_icon" android:layout_width= "48px" Android: layout_height= "48px" android:layout_margintop= "5px" android:layout_marginbottom= "5px" ></ImageView>< linearlayoutandroid:orientation= "vertical" android:layout_width= "wrap_content" android:layout_height= "48px" android:paddingleft= "5px" ><textviewandroid:id= "@+id/lv_item_appname" android:layout_width= "Fill_parent" android:layout_height= "Wrap_content" android:singleline= "true" android:textsize= "16px" android:textstyle= "bold" Android:textcolor= "#fff" ></textview><textviewandroid:id= "@+id/lv_item_packageame" Android:layout_ Width= "Fill_parent" android:layout_height= "Wrap_content" android:singleline= "true" android:textcolor= "#fff" > </TextView></linearlayout></linearlayout> 

/** * View app information * @author Bill * */public class Showappdetailactivity extends Activity {private TextView tv_appname;private T Extview tv_appversion;private TextView tv_packagename;private TextView tv_permission; @Overrideprotected void onCreate (Bundle savedinstancestate) {//TODO auto-generated method Stubsuper.oncreate (savedinstancestate); Setcontentview (r.layout.app_detial); tv_ AppName = (TextView) Findviewbyid (r.id.detail_app_name); tv_appversion = (TextView) Findviewbyid (r.id.detail_app_ version); tv_packagename = (TextView) Findviewbyid (r.id.detail_app_packname); tv_permission = (TextView) Findviewbyid ( R.id.detail_app_permissions); Bundle bundle = This.getintent (). Getextras (); String packagename= bundle.getstring ("PackageName"); String appversion = bundle.getstring ("appversion"); String appname = bundle.getstring ("appname"); string[] apppremissions = Bundle.getstringarray ("apppremissions"); StringBuilder sb = new StringBuilder (); for (String s:apppremissions) {sb.append (s); Sb.append ("\ n");} Tv_appnAme.settext (appname); Tv_appversion.settext (appversion); Tv_packagename.settext (PackageName); tv_ Permission.settext (Sb.tostring ());}}

App_detial.xml:

<?xml version= "1.0" encoding= "Utf-8"? ><linearlayout xmlns:android= "http://schemas.android.com/apk/res/    Android "android:orientation=" vertical "android:layout_width=" fill_parent "android:layout_height=" Fill_parent " > <tablelayout android:id= "@+id/app_table" android:layout_width= "Fill_parent" Android:layo ut_height= "Wrap_content" > <tablerow android:id= "@+id/tablerow1" android:layout_width= "WR Ap_content "android:layout_height=" wrap_content "> <textview android:la         Yout_width= "Wrap_content" android:layout_height= "wrap_content" android:text= "program name"/> <TextView        Android:layout_width= "Wrap_content" android:layout_height= "wrap_content" android:id= "@+id/detail_app_name"/> </TableRow> <tablerow android:id= "@+id/tablerow2" android:layout_width= "WR Ap_content "Android:layout_height= "Wrap_content" > <textview android:layout_width= "wrap_content" android:layout_height= "Wrap_co Ntent "android:text=" program version "/> <textview android:layout_width=" Wrap_content "Android:layout_heig ht= "Wrap_content" android:id= "@+id/detail_app_version"/> </TableRow> <tablerow Andro     Id:id= "@+id/tablerow3" android:layout_width= "wrap_content" android:layout_height= "Wrap_content" >     <textview android:layout_width= "wrap_content" android:layout_height= "wrap_content" android:text= "package name" /> <textview android:layout_width= "wrap_content" android:layout_height= "Wrap_content" android:i d= "@+id/detail_app_packname"/> </TableRow> <tablerow android:id= "@+id/tablerow4" a                  Ndroid:layout_width= "Wrap_content" android:layout_height= "wrap_content" > <textview Android:layout_widtH= "Wrap_content" android:layout_height= "wrap_content" android:text= "program permissions"/> <textview Android : layout_width= "wrap_content" android:layout_height= "wrap_content" android:id= "@+id/detail_app_permissions"/&             Gt </TableRow> </TableLayout></LinearLayout>

Finally, don't forget to configureAndroidmanifest.

Reprint Please specify source:http://blog.csdn.net/hai_qing_xu_kong/article/details/44274387 Emotional Control _

Learn Android together how to get a list of phone programs and program-related information and start the specified program (26)