这是我下面的源代码，它显示了所有已安装的系统应用程序。我只想显示选定的应用程序，例如仅 5 个我提供的名称的应用程序不显示所有应用程序我该怎么办？请帮我
public class ListInstalledApps extends Activity implements OnItemClickListener {
/* whether or not to include system apps */
private static final boolean INCLUDE_SYSTEM_APPS = false;
private ListView mAppsList;
private AppListAdapter mAdapter;
private List<App> mApps;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
mAppsList = (ListView) findViewById(R.id.appslist);
mAppsList.setOnItemClickListener(this);
mApps = loadInstalledApps(INCLUDE_SYSTEM_APPS);
mAdapter = new AppListAdapter(getApplicationContext());
mAdapter.setListItems(mApps);
mAppsList.setAdapter(mAdapter);
new LoadIconsTask().execute(mApps.toArray(new App[]{}));
}
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
final App app = (App) parent.getItemAtPosition(position);
AlertDialog.Builder builder = new AlertDialog.Builder(this);
String msg = app.getTitle() + "\n\n" +
"Version " + app.getVersionName() + " (" +
app.getVersionCode() + ")" +
(app.getDescription() != null ? ("\n\n" + app.getDescription()) : "");
builder.setMessage(msg)
.setCancelable(true)
.setTitle(app.getTitle())
.setIcon(mAdapter.getIcons().get(app.getPackageName()))
.setPositiveButton("Launch", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
// start the app by invoking its launch intent
Intent i = getPackageManager().getLaunchIntentForPackage(app.getPackageName());
try {
if (i != null) {
startActivity(i);
} else {
i = new Intent(app.getPackageName());
startActivity(i);
}
} catch (ActivityNotFoundException err) {
Toast.makeText(ListInstalledApps.this, "Error launching app",
Toast.LENGTH_SHORT).show();
}
}
})
.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
dialog.cancel();
}
});
AlertDialog dialog = builder.create();
dialog.show();
}
/**
* Uses the package manager to query for all currently installed apps which are put
into beans and returned
* in form of a list.
*
* @param includeSysApps whether or not to include system applications
* @return a list containing an {@code App} bean for each installed application
*/
private List<App> loadInstalledApps(boolean includeSysApps) {
List<App> apps = new ArrayList<App>();
// the package manager contains the information about all installed apps
PackageManager packageManager = getPackageManager();
List<PackageInfo> packs = packageManager.getInstalledPackages(0);
//PackageManager.GET_META_DATA
for(int i=0; i < packs.size(); i++) {
PackageInfo p = packs.get(i);
ApplicationInfo a = p.applicationInfo;
// skip system apps if they shall not be included
if ((!includeSysApps) && ((a.flags & ApplicationInfo.FLAG_SYSTEM) == 1)) {
continue;
}
App app = new App();
app.setTitle(p.applicationInfo.loadLabel(packageManager).toString());
app.setPackageName(p.packageName);
app.setVersionName(p.versionName);
app.setVersionCode(p.versionCode);
CharSequence description = p.applicationInfo.loadDescription(packageManager);
app.setDescription(description != null ? description.toString() : "");
apps.add(app);
}
return apps;
}
/**
* An asynchronous task to load the icons of the installed applications.
*/
private class LoadIconsTask extends AsyncTask<App, Void, Void> {
@Override
protected Void doInBackground(App... apps) {
Map<String, Drawable> icons = new HashMap<String, Drawable>();
PackageManager manager = getApplicationContext().getPackageManager();
for (App app : apps) {
String pkgName = app.getPackageName();
Drawable ico = null;
try {
Intent i = manager.getLaunchIntentForPackage(pkgName);
if (i != null) {
ico = manager.getActivityIcon(i);
}
} catch (NameNotFoundException e) {
Log.e("ERROR", "Unable to find icon for package '" + pkgName + "': " +
e.getMessage());
}
icons.put(app.getPackageName(), ico);
}
mAdapter.setIcons(icons);
return null;
}
@Override
protected void onPostExecute(Void result) {
mAdapter.notifyDataSetChanged();
}
}
}