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/*
* Copyright (C) 2011 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.location;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.location.LocationManager;
import android.os.Bundle;
import android.os.UserManager;
import android.provider.Settings;
import android.util.Log;
import com.android.settings.SettingsPreferenceFragment;
/**
* A base class that listens to location settings change and modifies location
* settings.
*/
public abstract class LocationSettingsBase extends SettingsPreferenceFragment {
private static final String TAG = "LocationSettingsBase";
/** Broadcast intent action when the location mode is about to change. */
private static final String MODE_CHANGING_ACTION =
"com.android.settings.location.MODE_CHANGING";
private static final String CURRENT_MODE_KEY = "CURRENT_MODE";
private static final String NEW_MODE_KEY = "NEW_MODE";
private int mCurrentMode;
private BroadcastReceiver mReceiver;
/**
* Whether the fragment is actively running.
*/
private boolean mActive = false;
@Override
public void onCreate(Bundle icicle) {
super.onCreate(icicle);
mReceiver = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
if (Log.isLoggable(TAG, Log.DEBUG)) {
Log.d(TAG, "Received location mode change intent: " + intent);
}
refreshLocationMode();
}
};
}
@Override
public void onResume() {
super.onResume();
mActive = true;
IntentFilter filter = new IntentFilter();
filter.addAction(LocationManager.MODE_CHANGED_ACTION);
getActivity().registerReceiver(mReceiver, filter);
}
@Override
public void onPause() {
try {
getActivity().unregisterReceiver(mReceiver);
} catch (RuntimeException e) {
// Ignore exceptions caused by race condition
}
super.onPause();
mActive = false;
}
/** Called when location mode has changed. */
public abstract void onModeChanged(int mode, boolean restricted);
private boolean isRestricted() {
final UserManager um = (UserManager) getActivity().getSystemService(Context.USER_SERVICE);
return um.hasUserRestriction(UserManager.DISALLOW_SHARE_LOCATION);
}
public void setLocationMode(int mode) {
if (isRestricted()) {
// Location toggling disabled by user restriction. Read the current location mode to
// update the location master switch.
if (Log.isLoggable(TAG, Log.INFO)) {
Log.i(TAG, "Restricted user, not setting location mode");
}
mode = Settings.Secure.getInt(getContentResolver(), Settings.Secure.LOCATION_MODE,
Settings.Secure.LOCATION_MODE_OFF);
if (mActive) {
onModeChanged(mode, true);
}
return;
}
Intent intent = new Intent(MODE_CHANGING_ACTION);
intent.putExtra(CURRENT_MODE_KEY, mCurrentMode);
intent.putExtra(NEW_MODE_KEY, mode);
getActivity().sendBroadcast(intent, android.Manifest.permission.WRITE_SECURE_SETTINGS);
Settings.Secure.putInt(getContentResolver(), Settings.Secure.LOCATION_MODE, mode);
refreshLocationMode();
}
public void refreshLocationMode() {
if (mActive) {
int mode = Settings.Secure.getInt(getContentResolver(), Settings.Secure.LOCATION_MODE,
Settings.Secure.LOCATION_MODE_OFF);
mCurrentMode = mode;
if (Log.isLoggable(TAG, Log.INFO)) {
Log.i(TAG, "Location mode has been changed");
}
onModeChanged(mode, isRestricted());
}
}
}
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