/*
* Copyright (C) 2015 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.android.settings.applications;
import android.app.AlertDialog;
import android.app.AppOpsManager;
import android.content.ActivityNotFoundException;
import android.content.Context;
import android.content.Intent;
import android.content.pm.ApplicationInfo;
import android.content.pm.PackageManager;
import android.os.Bundle;
import android.os.UserHandle;
import android.provider.Settings;
import android.support.v14.preference.SwitchPreference;
import android.support.v7.preference.Preference;
import android.support.v7.preference.Preference.OnPreferenceChangeListener;
import android.support.v7.preference.Preference.OnPreferenceClickListener;
import android.util.Log;
import com.android.internal.logging.MetricsProto.MetricsEvent;
import com.android.settings.R;
import com.android.settings.applications.AppStateAppOpsBridge.PermissionState;
import com.android.settings.applications.AppStateOverlayBridge.OverlayState;
import com.android.settingslib.applications.ApplicationsState.AppEntry;
public class DrawOverlayDetails extends AppInfoWithHeader implements OnPreferenceChangeListener,
OnPreferenceClickListener {
private static final String KEY_APP_OPS_SETTINGS_SWITCH = "app_ops_settings_switch";
private static final String KEY_APP_OPS_SETTINGS_PREFS = "app_ops_settings_preference";
private static final String KEY_APP_OPS_SETTINGS_DESC = "app_ops_settings_description";
private static final String LOG_TAG = "DrawOverlayDetails";
private static final int [] APP_OPS_OP_CODE = {
AppOpsManager.OP_SYSTEM_ALERT_WINDOW
};
// Use a bridge to get the overlay details but don't initialize it to connect with all state.
// TODO: Break out this functionality into its own class.
private AppStateOverlayBridge mOverlayBridge;
private AppOpsManager mAppOpsManager;
private SwitchPreference mSwitchPref;
private Preference mOverlayPrefs;
private Preference mOverlayDesc;
private Intent mSettingsIntent;
private OverlayState mOverlayState;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Context context = getActivity();
mOverlayBridge = new AppStateOverlayBridge(context, mState, null);
mAppOpsManager = (AppOpsManager) context.getSystemService(Context.APP_OPS_SERVICE);
// find preferences
addPreferencesFromResource(R.xml.app_ops_permissions_details);
mSwitchPref = (SwitchPreference) findPreference(KEY_APP_OPS_SETTINGS_SWITCH);
mOverlayPrefs = findPreference(KEY_APP_OPS_SETTINGS_PREFS);
mOverlayDesc = findPreference(KEY_APP_OPS_SETTINGS_DESC);
// set title/summary for all of them
getPreferenceScreen().setTitle(R.string.draw_overlay);
mSwitchPref.setTitle(R.string.permit_draw_overlay);
mOverlayPrefs.setTitle(R.string.app_overlay_permission_preference);
mOverlayDesc.setSummary(R.string.allow_overlay_description);
// install event listeners
mSwitchPref.setOnPreferenceChangeListener(this);
mOverlayPrefs.setOnPreferenceClickListener(this);
mSettingsIntent = new Intent(Intent.ACTION_MAIN)
.setAction(Settings.ACTION_MANAGE_OVERLAY_PERMISSION);
}
@Override
public void onDestroy() {
super.onDestroy();
mOverlayBridge.release();
}
@Override
public boolean onPreferenceClick(Preference preference) {
if (preference == mOverlayPrefs) {
if (mSettingsIntent != null) {
try {
getActivity().startActivityAsUser(mSettingsIntent, new UserHandle(mUserId));
} catch (ActivityNotFoundException e) {
Log.w(LOG_TAG, "Unable to launch app draw overlay settings " + mSettingsIntent, e);
}
}
return true;
}
return false;
}
@Override
public boolean onPreferenceChange(Preference preference, Object newValue) {
if (preference == mSwitchPref) {
if (mOverlayState != null && (Boolean) newValue != mOverlayState.isPermissible()) {
setCanDrawOverlay(!mOverlayState.isPermissible());
refreshUi();
}
return true;
}
return false;
}
private void setCanDrawOverlay(boolean newState) {
mAppOpsManager.setMode(AppOpsManager.OP_SYSTEM_ALERT_WINDOW,
mPackageInfo.applicationInfo.uid, mPackageName, newState
? AppOpsManager.MODE_ALLOWED : AppOpsManager.MODE_ERRORED);
}
private boolean canDrawOverlay(String pkgName) {
int result = mAppOpsManager.noteOpNoThrow(AppOpsManager.OP_SYSTEM_ALERT_WINDOW,
mPackageInfo.applicationInfo.uid, pkgName);
if (result == AppOpsManager.MODE_ALLOWED) {
return true;
}
return false;
}
@Override
protected boolean refreshUi() {
mOverlayState = mOverlayBridge.getOverlayInfo(mPackageName,
mPackageInfo.applicationInfo.uid);
boolean isAllowed = mOverlayState.isPermissible();
mSwitchPref.setChecked(isAllowed);
// you cannot ask a user to grant you a permission you did not have!
mSwitchPref.setEnabled(mOverlayState.permissionDeclared);
mOverlayPrefs.setEnabled(isAllowed);
getPreferenceScreen().removePreference(mOverlayPrefs);
return true;
}
@Override
protected AlertDialog createDialog(int id, int errorCode) {
return null;
}
@Override
protected int getMetricsCategory() {
return MetricsEvent.SYSTEM_ALERT_WINDOW_APPS;
}
public static CharSequence getSummary(Context context, AppEntry entry) {
OverlayState state;
if (entry.extraInfo instanceof OverlayState) {
state = (OverlayState) entry.extraInfo;
} else if (entry.extraInfo instanceof PermissionState) {
state = new OverlayState((PermissionState) entry.extraInfo);
} else {
state = new AppStateOverlayBridge(context, null, null).getOverlayInfo(
entry.info.packageName, entry.info.uid);
}
return getSummary(context, state);
}
public static CharSequence getSummary(Context context, OverlayState overlayState) {
return context.getString(overlayState.isPermissible() ?
R.string.system_alert_window_on : R.string.system_alert_window_off);
}
public static CharSequence getSummary(Context context, String pkg) {
// first check if pkg is a system pkg
PackageManager packageManager = context.getPackageManager();
int uid = -1;
try {
ApplicationInfo appInfo = packageManager.getApplicationInfo(pkg, 0);
uid = appInfo.uid;
if ((appInfo.flags & ApplicationInfo.FLAG_SYSTEM) != 0) {
return context.getString(R.string.system_alert_window_on);
}
} catch (PackageManager.NameNotFoundException e) {
// pkg doesn't even exist?
Log.w(LOG_TAG, "Package " + pkg + " not found", e);
return context.getString(R.string.system_alert_window_off);
}
AppOpsManager appOpsManager = (AppOpsManager) context.getSystemService(Context
.APP_OPS_SERVICE);
if (uid == -1) {
return context.getString(R.string.system_alert_window_off);
}
int mode = appOpsManager.noteOpNoThrow(AppOpsManager.OP_SYSTEM_ALERT_WINDOW, uid, pkg);
return context.getString((mode == AppOpsManager.MODE_ALLOWED) ?
R.string.system_alert_window_on : R.string.system_alert_window_off);
}
}