Learn how to get the mobile phone program list and program-related information and start the specified program (26), android-related information

Learn how to get the mobile phone program list and program-related information and start the specified program (26), android-related information

:

Program list:

Start the program and obtain the program information:

The Code is as follows:

Create an AppInfo class to represent the application

<Pre name = "code" class = "java"> public class AppInfo {public CharSequence title; // program name public CharSequence packageName; // program name Intent intent; // start Intentpublic Drawable icon; // program icon/** set Intent */final void setActivity (ComponentName className, int launchFlags) {intent = new Intent (Intent. ACTION_MAIN); intent. addCategory (Intent. CATEGORY_LAUNCHER); intent. setComponent (className); intent. setFlags (launchFlags );}}

Create an adapter for the program list:

/*** Program list adapter ** @ author bill **/public class ShowAppListAdapter extends BaseAdapter {private ArrayList <AppInfo> appList; 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 set */private ArrayList <AppInfo> appInfos; private ListView lv_app;/** manage application packages, and obtain the program information */private PackageManager pm; @ Overrideprotected void onCreate (Bundle savedInstanceState) {super. onCreate (savedInstanceState); setContentView (R. layout. app_list); pm = getPackageManager (); initView (); new Thread (runable ). start ();} private void initView () {lv_app = (Li StView) 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 ShowAppListAdapter (MainActivity. this, appInfos, pm ));}};/** * Load the Application List */private void loadApplications () {PackageManager manager = this. getPackageManager (); Intent mainIntent = new Intent (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_NE W_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; public void onItemClick (AdapterView <?> View, View arg1, final int position, long arg3) {AlertDialog. builder builder = new AlertDialog. builder (MainActivity. this); builder. setTitle ("option"); builder. setItems (R. array. choice, new OnClickListener () {public void onClick (DialogInterface dialog, int which) {final AppInfo appInfo = appInfos. get (position); switch (which) {case 0: // start the program try {startApp (appInfo);} catch (Exception e) {} break; case 1: // For 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, "The program cannot be started", Toast. LENGTH_SHORT); return;} Intent intent = new Intent (); intent. setComponent (new ComponentName (packName, activityName); startActivity (intent) ;}}); dialog = builder. create (); dialog. show () ;}/ *** get program information * @ param packName * @ return * @ throws Exception */public PackageInfo getAppPackinfo (String packName) throws Exception {return pm. getPackageInfo (packName, PackageManager. GET_ACTIVITIES | PackageManager. GET_PERMISSIONS);}/*** get the Activity that starts the relevant program * @ param packName * @ return * @ throws Exception */public String getActivityName (String packName) throws 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:orientation="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 application information ** @ author bill **/public class ShowAppDetailActivity extends Activity {private TextView TV _appname; private TextView 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: layout_height = "wrap_content"> <TableRow android: id = "@ + id/tableRow1" android: layout_width = "wrap_content" android: layout_height = "wrap_content"> <TextView android: layout_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 = "wrap_content" android: layout_height = "wrap_content"> <TextView android: layout_width = "wrap_content" android: layout_height = "wrap_content" android: text = "program version"/> <TextView android: layout_width = "wrap_content" android: layout_height = "wrap_content" android: id = "@ + id/detail_app_version"/> </TableRow> <TableRow android: 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: id = "@ + id/detail_app_packname"/> </TableRow> <TableRow android: id = "@ + id/tableRow4" android: layout_width = "wrap_content" android: layout_height = "wrap_content"> <TextView android: layout_width = "wrap_content" android: layout_height = "wrap_content" android: text = "app permission"/> <TextView android: layout_width = "wrap_content" android: layout_height = "wrap_content" android: id = "@ + id/detail_app_permissions"/> </TableRow> </TableLayout> </LinearLayout>

Finally, do not forget to configure AndroidManifest.

Reprinted please indicate the source: http://blog.csdn.net/hai_qing_xu_kong/article/details/44274387 sentiment control _