1 /* 2 * Copyright (C) 2018 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file 5 * except in compliance with the License. You may obtain a copy of the License at 6 * 7 * http://www.apache.org/licenses/LICENSE-2.0 8 * 9 * Unless required by applicable law or agreed to in writing, software distributed under the 10 * License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 11 * KIND, either express or implied. See the License for the specific language governing 12 * permissions and limitations under the License. 13 */ 14 15 package com.android.settings.deviceinfo.legal; 16 17 import android.content.Context; 18 import android.content.Intent; 19 import android.content.pm.ApplicationInfo; 20 import android.content.pm.PackageManager; 21 import android.content.pm.ResolveInfo; 22 23 import androidx.preference.Preference; 24 import androidx.preference.PreferenceScreen; 25 26 import com.android.settings.core.BasePreferenceController; 27 28 import java.util.List; 29 30 31 public abstract class LegalPreferenceController extends BasePreferenceController { 32 private final PackageManager mPackageManager; 33 private Preference mPreference; 34 LegalPreferenceController(Context context, String key)35 public LegalPreferenceController(Context context, String key) { 36 super(context, key); 37 mPackageManager = mContext.getPackageManager(); 38 } 39 40 @Override getAvailabilityStatus()41 public int getAvailabilityStatus() { 42 if (findMatchingSpecificActivity() != null) { 43 return AVAILABLE; 44 } else { 45 return UNSUPPORTED_ON_DEVICE; 46 } 47 } 48 49 @Override displayPreference(PreferenceScreen screen)50 public void displayPreference(PreferenceScreen screen) { 51 mPreference = screen.findPreference(getPreferenceKey()); 52 super.displayPreference(screen); 53 54 if (getAvailabilityStatus() == AVAILABLE) { 55 replacePreferenceIntent(); 56 } 57 } 58 getIntent()59 protected abstract Intent getIntent(); 60 findMatchingSpecificActivity()61 private ResolveInfo findMatchingSpecificActivity() { 62 final Intent intent = getIntent(); 63 if (intent == null) { 64 return null; 65 } 66 67 // Find the activity that is in the system image 68 final List<ResolveInfo> list = mPackageManager.queryIntentActivities(intent, 0); 69 if (list == null) { 70 return null; 71 } 72 73 for (ResolveInfo resolveInfo : list) { 74 if ((resolveInfo.activityInfo.applicationInfo.flags & ApplicationInfo.FLAG_SYSTEM) 75 != 0) { 76 return resolveInfo; 77 } 78 } 79 80 // Did not find a matching activity 81 return null; 82 } 83 replacePreferenceIntent()84 private void replacePreferenceIntent() { 85 final ResolveInfo resolveInfo = findMatchingSpecificActivity(); 86 if (resolveInfo == null) { 87 return; 88 } 89 90 // Replace the intent with this specific activity 91 mPreference.setIntent(new Intent().setClassName( 92 resolveInfo.activityInfo.packageName, 93 resolveInfo.activityInfo.name)); 94 95 mPreference.setTitle(resolveInfo.loadLabel(mPackageManager)); 96 } 97 } 98