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; 17 18 import android.app.AlertDialog; 19 import android.app.AppOpsManager; 20 import android.content.ActivityNotFoundException; 21 import android.content.ComponentName; 22 import android.content.Context; 23 import android.content.Intent; 24 import android.content.pm.ApplicationInfo; 25 import android.content.pm.PackageInfo; 26 import android.content.pm.PackageManager; 27 import android.os.Bundle; 28 import android.os.UserHandle; 29 import android.preference.Preference; 30 import android.preference.Preference.OnPreferenceChangeListener; 31 import android.preference.Preference.OnPreferenceClickListener; 32 import android.preference.SwitchPreference; 33 import android.provider.Settings; 34 import android.util.Log; 35 36 import com.android.internal.logging.MetricsLogger; 37 import com.android.settings.InstrumentedFragment; 38 import com.android.settings.R; 39 import com.android.settings.applications.AppStateAppOpsBridge.PermissionState; 40 import com.android.settings.applications.AppStateOverlayBridge.OverlayState; 41 import com.android.settingslib.applications.ApplicationsState; 42 import com.android.settingslib.applications.ApplicationsState.AppEntry; 43 44 import java.util.List; 45 46 public class DrawOverlayDetails extends AppInfoWithHeader implements OnPreferenceChangeListener, 47 OnPreferenceClickListener { 48 49 private static final String KEY_APP_OPS_SETTINGS_SWITCH = "app_ops_settings_switch"; 50 private static final String KEY_APP_OPS_SETTINGS_PREFS = "app_ops_settings_preference"; 51 private static final String KEY_APP_OPS_SETTINGS_DESC = "app_ops_settings_description"; 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 Preference mOverlayPrefs; 64 private Preference mOverlayDesc; 65 private Intent mSettingsIntent; 66 private OverlayState mOverlayState; 67 68 @Override 69 public void onCreate(Bundle savedInstanceState) { 70 super.onCreate(savedInstanceState); 71 72 Context context = getActivity(); 73 mOverlayBridge = new AppStateOverlayBridge(context, mState, null); 74 mAppOpsManager = (AppOpsManager) context.getSystemService(Context.APP_OPS_SERVICE); 75 76 // find preferences 77 addPreferencesFromResource(R.xml.app_ops_permissions_details); 78 mSwitchPref = (SwitchPreference) findPreference(KEY_APP_OPS_SETTINGS_SWITCH); 79 mOverlayPrefs = findPreference(KEY_APP_OPS_SETTINGS_PREFS); 80 mOverlayDesc = findPreference(KEY_APP_OPS_SETTINGS_DESC); 81 82 // set title/summary for all of them 83 getPreferenceScreen().setTitle(R.string.draw_overlay); 84 mSwitchPref.setTitle(R.string.permit_draw_overlay); 85 mOverlayPrefs.setTitle(R.string.app_overlay_permission_preference); 86 mOverlayDesc.setSummary(R.string.allow_overlay_description); 87 88 // install event listeners 89 mSwitchPref.setOnPreferenceChangeListener(this); 90 mOverlayPrefs.setOnPreferenceClickListener(this); 91 92 mSettingsIntent = new Intent(Intent.ACTION_MAIN) 93 .setAction(Settings.ACTION_MANAGE_OVERLAY_PERMISSION); 94 } 95 96 @Override 97 public boolean onPreferenceClick(Preference preference) { 98 if (preference == mOverlayPrefs) { 99 if (mSettingsIntent != null) { 100 try { 101 getActivity().startActivityAsUser(mSettingsIntent, new UserHandle(mUserId)); 102 } catch (ActivityNotFoundException e) { 103 Log.w(LOG_TAG, "Unable to launch app draw overlay settings " + mSettingsIntent, e); 104 } 105 } 106 return true; 107 } 108 return false; 109 } 110 111 @Override 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 } 122 123 private void setCanDrawOverlay(boolean newState) { 124 mAppOpsManager.setMode(AppOpsManager.OP_SYSTEM_ALERT_WINDOW, 125 mPackageInfo.applicationInfo.uid, mPackageName, newState 126 ? AppOpsManager.MODE_ALLOWED : AppOpsManager.MODE_ERRORED); 127 } 128 129 private boolean canDrawOverlay(String pkgName) { 130 int result = mAppOpsManager.noteOpNoThrow(AppOpsManager.OP_SYSTEM_ALERT_WINDOW, 131 mPackageInfo.applicationInfo.uid, pkgName); 132 if (result == AppOpsManager.MODE_ALLOWED) { 133 return true; 134 } 135 136 return false; 137 } 138 139 @Override 140 protected boolean refreshUi() { 141 mOverlayState = mOverlayBridge.getOverlayInfo(mPackageName, 142 mPackageInfo.applicationInfo.uid); 143 144 boolean isAllowed = mOverlayState.isPermissible(); 145 mSwitchPref.setChecked(isAllowed); 146 // you cannot ask a user to grant you a permission you did not have! 147 mSwitchPref.setEnabled(mOverlayState.permissionDeclared); 148 mOverlayPrefs.setEnabled(isAllowed); 149 getPreferenceScreen().removePreference(mOverlayPrefs); 150 151 return true; 152 } 153 154 @Override 155 protected AlertDialog createDialog(int id, int errorCode) { 156 return null; 157 } 158 159 @Override 160 protected int getMetricsCategory() { 161 return MetricsLogger.SYSTEM_ALERT_WINDOW_APPS; 162 } 163 164 public static CharSequence getSummary(Context context, AppEntry entry) { 165 if (entry.extraInfo != null) { 166 return getSummary(context, new OverlayState((PermissionState)entry.extraInfo)); 167 } 168 169 // fallback if for whatever reason entry.extrainfo is null - the result 170 // may be less accurate 171 return getSummary(context, entry.info.packageName); 172 } 173 174 public static CharSequence getSummary(Context context, OverlayState overlayState) { 175 return context.getString(overlayState.isPermissible() ? 176 R.string.system_alert_window_on : R.string.system_alert_window_off); 177 } 178 179 public static CharSequence getSummary(Context context, String pkg) { 180 // first check if pkg is a system pkg 181 PackageManager packageManager = context.getPackageManager(); 182 int uid = -1; 183 try { 184 ApplicationInfo appInfo = packageManager.getApplicationInfo(pkg, 0); 185 uid = appInfo.uid; 186 if ((appInfo.flags & ApplicationInfo.FLAG_SYSTEM) != 0) { 187 return context.getString(R.string.system_alert_window_on); 188 } 189 } catch (PackageManager.NameNotFoundException e) { 190 // pkg doesn't even exist? 191 Log.w(LOG_TAG, "Package " + pkg + " not found", e); 192 return context.getString(R.string.system_alert_window_off); 193 } 194 195 AppOpsManager appOpsManager = (AppOpsManager) context.getSystemService(Context 196 .APP_OPS_SERVICE); 197 if (uid == -1) { 198 return context.getString(R.string.system_alert_window_off); 199 } 200 201 int mode = appOpsManager.noteOpNoThrow(AppOpsManager.OP_SYSTEM_ALERT_WINDOW, uid, pkg); 202 return context.getString((mode == AppOpsManager.MODE_ALLOWED) ? 203 R.string.system_alert_window_on : R.string.system_alert_window_off); 204 } 205 } 206
