1 /* 2 * Copyright (C) 2015 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 package com.android.settings.applications.appinfo; 17 18 import static android.view.WindowManager.LayoutParams.PRIVATE_FLAG_HIDE_NON_SYSTEM_OVERLAY_WINDOWS; 19 20 import android.app.AlertDialog; 21 import android.app.AppOpsManager; 22 import android.content.ActivityNotFoundException; 23 import android.content.Context; 24 import android.content.Intent; 25 import android.content.pm.PackageManager; 26 import android.content.pm.ResolveInfo; 27 import android.os.Bundle; 28 import android.os.UserHandle; 29 import android.provider.Settings; 30 import android.support.v14.preference.SwitchPreference; 31 import android.support.v7.preference.Preference; 32 import android.support.v7.preference.Preference.OnPreferenceChangeListener; 33 import android.support.v7.preference.Preference.OnPreferenceClickListener; 34 import android.util.Log; 35 import android.view.Window; 36 import android.view.WindowManager; 37 38 import com.android.internal.annotations.VisibleForTesting; 39 import com.android.internal.logging.nano.MetricsProto.MetricsEvent; 40 import com.android.settings.R; 41 import com.android.settings.applications.AppInfoWithHeader; 42 import com.android.settings.applications.AppStateAppOpsBridge.PermissionState; 43 import com.android.settings.applications.AppStateOverlayBridge; 44 import com.android.settings.applications.AppStateOverlayBridge.OverlayState; 45 import com.android.settings.overlay.FeatureFactory; 46 import com.android.settingslib.applications.ApplicationsState.AppEntry; 47 48 public class DrawOverlayDetails extends AppInfoWithHeader implements OnPreferenceChangeListener, 49 OnPreferenceClickListener { 50 51 private static final String KEY_APP_OPS_SETTINGS_SWITCH = "app_ops_settings_switch"; 52 private static final String LOG_TAG = "DrawOverlayDetails"; 53 54 private static final int [] APP_OPS_OP_CODE = { 55 AppOpsManager.OP_SYSTEM_ALERT_WINDOW 56 }; 57 58 // Use a bridge to get the overlay details but don't initialize it to connect with all state. 59 // TODO: Break out this functionality into its own class. 60 private AppStateOverlayBridge mOverlayBridge; 61 private AppOpsManager mAppOpsManager; 62 private SwitchPreference mSwitchPref; 63 private Intent mSettingsIntent; 64 private OverlayState mOverlayState; 65 66 @Override onCreate(Bundle savedInstanceState)67 public void onCreate(Bundle savedInstanceState) { 68 super.onCreate(savedInstanceState); 69 70 Context context = getActivity(); 71 mOverlayBridge = new AppStateOverlayBridge(context, mState, null); 72 mAppOpsManager = (AppOpsManager) context.getSystemService(Context.APP_OPS_SERVICE); 73 74 // find preferences 75 addPreferencesFromResource(R.xml.draw_overlay_permissions_details); 76 mSwitchPref = (SwitchPreference) findPreference(KEY_APP_OPS_SETTINGS_SWITCH); 77 78 // install event listeners 79 mSwitchPref.setOnPreferenceChangeListener(this); 80 81 mSettingsIntent = new Intent(Intent.ACTION_MAIN) 82 .setAction(Settings.ACTION_MANAGE_OVERLAY_PERMISSION); 83 } 84 85 @Override onResume()86 public void onResume() { 87 super.onResume(); 88 getActivity().getWindow().addPrivateFlags(PRIVATE_FLAG_HIDE_NON_SYSTEM_OVERLAY_WINDOWS); 89 } 90 91 @Override onPause()92 public void onPause() { 93 super.onPause(); 94 Window window = getActivity().getWindow(); 95 WindowManager.LayoutParams attrs = window.getAttributes(); 96 attrs.privateFlags &= ~PRIVATE_FLAG_HIDE_NON_SYSTEM_OVERLAY_WINDOWS; 97 window.setAttributes(attrs); 98 } 99 100 @Override onDestroy()101 public void onDestroy() { 102 super.onDestroy(); 103 mOverlayBridge.release(); 104 } 105 106 @Override onPreferenceClick(Preference preference)107 public boolean onPreferenceClick(Preference preference) { 108 return false; 109 } 110 111 @Override onPreferenceChange(Preference preference, Object newValue)112 public boolean onPreferenceChange(Preference preference, Object newValue) { 113 if (preference == mSwitchPref) { 114 if (mOverlayState != null && (Boolean) newValue != mOverlayState.isPermissible()) { 115 setCanDrawOverlay(!mOverlayState.isPermissible()); 116 refreshUi(); 117 } 118 return true; 119 } 120 return false; 121 } 122 setCanDrawOverlay(boolean newState)123 private void setCanDrawOverlay(boolean newState) { 124 logSpecialPermissionChange(newState, mPackageName); 125 mAppOpsManager.setMode(AppOpsManager.OP_SYSTEM_ALERT_WINDOW, 126 mPackageInfo.applicationInfo.uid, mPackageName, newState 127 ? AppOpsManager.MODE_ALLOWED : AppOpsManager.MODE_ERRORED); 128 } 129 130 @VisibleForTesting logSpecialPermissionChange(boolean newState, String packageName)131 void logSpecialPermissionChange(boolean newState, String packageName) { 132 int logCategory = newState ? MetricsEvent.APP_SPECIAL_PERMISSION_APPDRAW_ALLOW 133 : MetricsEvent.APP_SPECIAL_PERMISSION_APPDRAW_DENY; 134 FeatureFactory.getFactory(getContext()) 135 .getMetricsFeatureProvider().action(getContext(), logCategory, packageName); 136 } 137 138 @Override refreshUi()139 protected boolean refreshUi() { 140 mOverlayState = mOverlayBridge.getOverlayInfo(mPackageName, 141 mPackageInfo.applicationInfo.uid); 142 143 boolean isAllowed = mOverlayState.isPermissible(); 144 mSwitchPref.setChecked(isAllowed); 145 // you cannot ask a user to grant you a permission you did not have! 146 mSwitchPref.setEnabled(mOverlayState.permissionDeclared && mOverlayState.controlEnabled); 147 148 ResolveInfo resolveInfo = mPm.resolveActivityAsUser(mSettingsIntent, 149 PackageManager.GET_META_DATA, mUserId); 150 151 return true; 152 } 153 154 @Override createDialog(int id, int errorCode)155 protected AlertDialog createDialog(int id, int errorCode) { 156 return null; 157 } 158 159 @Override getMetricsCategory()160 public int getMetricsCategory() { 161 return MetricsEvent.SYSTEM_ALERT_WINDOW_APPS; 162 } 163 getSummary(Context context, AppEntry entry)164 public static CharSequence getSummary(Context context, AppEntry entry) { 165 OverlayState state; 166 if (entry.extraInfo instanceof OverlayState) { 167 state = (OverlayState) entry.extraInfo; 168 } else if (entry.extraInfo instanceof PermissionState) { 169 state = new OverlayState((PermissionState) entry.extraInfo); 170 } else { 171 state = new AppStateOverlayBridge(context, null, null).getOverlayInfo( 172 entry.info.packageName, entry.info.uid); 173 } 174 175 return getSummary(context, state); 176 } 177 getSummary(Context context, OverlayState overlayState)178 public static CharSequence getSummary(Context context, OverlayState overlayState) { 179 return context.getString(overlayState.isPermissible() ? 180 R.string.app_permission_summary_allowed : R.string.app_permission_summary_not_allowed); 181 } 182 } 183