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SelectAppFragment.java
/* * Copyright (C) 2016 The Android Open Source Project * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package com.afwsamples.testdpc.common; import android.app.Fragment; import android.content.pm.ApplicationInfo; import android.content.pm.PackageManager; import android.os.Bundle; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.AdapterView; import android.widget.AdapterView.OnItemClickListener; import android.widget.EditText; import android.widget.ListView; import com.afwsamples.testdpc.R; import java.util.ArrayList; import java.util.Collections; import java.util.List; /** * This fragment shows the list of apps, and allows the user to select one of them to perform a * certain operation as defined by {@link #setSelectedPackage}. Alternatively the user can manually * specify an app's package name, in case the app has not been installed yet. */ public abstract class SelectAppFragment extends Fragment implements View.OnClickListener, OnItemClickListener { private EditText mCurrentSelectedPackage; private EditText mNewSelectedPackage; private ListView mAppListView; private List
mAppPackages; @Override public void onResume() { super.onResume(); reloadSelectedPackage(); } @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); mAppPackages = createAppList(); } @Override public View onCreateView(LayoutInflater layoutInflater, ViewGroup container, Bundle savedInstanceState) { View view = layoutInflater.inflate(R.layout.select_app, null); mCurrentSelectedPackage = (EditText) view.findViewById(R.id.selected_package_current); mNewSelectedPackage = (EditText) view.findViewById(R.id.selected_package_new); mAppListView = (ListView) view.findViewById(R.id.select_app_list); AppInfoArrayAdapter appInfoArrayAdapter = new AppInfoArrayAdapter(getActivity(), R.id.pkg_name, mAppPackages, true); mAppListView.setAdapter(appInfoArrayAdapter); view.findViewById(R.id.selected_package_set).setOnClickListener(this); view.findViewById(R.id.selected_package_clear).setOnClickListener(this); mAppListView.setOnItemClickListener(this); return view; } /** * @return a list of apps that users are allowed to select from. */ protected List
createAppList() { List
appList = new ArrayList<>(); PackageManager pm = getActivity().getPackageManager(); List
allApps = pm.getInstalledApplications(0 /* No flag */); Collections.sort(allApps, new ApplicationInfo.DisplayNameComparator(pm)); for(ApplicationInfo info : allApps) { if ((pm.getLaunchIntentForPackage(info.packageName)) != null) { appList.add(info.packageName); } } return appList; } @Override public void onClick(View v) { switch (v.getId()) { case R.id.selected_package_set: setSelectedPackage(mNewSelectedPackage.getText().toString()); reloadSelectedPackage(); break; case R.id.selected_package_clear: mNewSelectedPackage.setText(""); clearSelectedPackage(); reloadSelectedPackage(); break; } } private void reloadSelectedPackage() { String selectedPackage = getSelectedPackage(); if (selectedPackage == null) { mCurrentSelectedPackage.setText(""); } else { mCurrentSelectedPackage.setText(selectedPackage); } } @Override public void onItemClick(AdapterView> parent, View view, int position, long id) { String packageName = mAppPackages.get(position); mNewSelectedPackage.setText(packageName); } /** * Sets the given package name as the new selected package. */ protected abstract void setSelectedPackage(String pkgName); /** * Clears the currently selected package. */ protected abstract void clearSelectedPackage(); /** * Get the currently selected package, or {@code null} if no package has been set or if it has * been cleared. */ protected abstract String getSelectedPackage(); }