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/*
* Copyright (C) 2014 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.fuelgauge;
import static android.os.PowerManager.ACTION_POWER_SAVE_MODE_CHANGING;
import android.content.BroadcastReceiver;
import android.content.ContentResolver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.content.res.Resources;
import android.database.ContentObserver;
import android.net.Uri;
import android.os.AsyncTask;
import android.os.Bundle;
import android.os.Handler;
import android.os.PowerManager;
import android.provider.Settings.Global;
import android.util.Log;
import android.widget.Switch;
import com.android.internal.logging.MetricsLogger;
import com.android.settings.R;
import com.android.settings.SettingsActivity;
import com.android.settings.SettingsPreferenceFragment;
import com.android.settings.Utils;
import com.android.settings.notification.SettingPref;
import com.android.settings.widget.SwitchBar;
public class BatterySaverSettings extends SettingsPreferenceFragment
implements SwitchBar.OnSwitchChangeListener {
private static final String TAG = "BatterySaverSettings";
private static final boolean DEBUG = Log.isLoggable(TAG, Log.DEBUG);
private static final String KEY_TURN_ON_AUTOMATICALLY = "turn_on_automatically";
private static final long WAIT_FOR_SWITCH_ANIM = 500;
private final Handler mHandler = new Handler();
private final SettingsObserver mSettingsObserver = new SettingsObserver(mHandler);
private final Receiver mReceiver = new Receiver();
private Context mContext;
private boolean mCreated;
private SettingPref mTriggerPref;
private SwitchBar mSwitchBar;
private Switch mSwitch;
private boolean mValidListener;
private PowerManager mPowerManager;
@Override
protected int getMetricsCategory() {
return MetricsLogger.FUELGAUGE_BATTERY_SAVER;
}
@Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
if (mCreated) {
mSwitchBar.show();
return;
}
mCreated = true;
addPreferencesFromResource(R.xml.battery_saver_settings);
mContext = getActivity();
mSwitchBar = ((SettingsActivity) mContext).getSwitchBar();
mSwitch = mSwitchBar.getSwitch();
mSwitchBar.show();
mTriggerPref = new SettingPref(SettingPref.TYPE_GLOBAL, KEY_TURN_ON_AUTOMATICALLY,
Global.LOW_POWER_MODE_TRIGGER_LEVEL,
0, /*default*/
getResources().getIntArray(R.array.battery_saver_trigger_values)) {
@Override
protected String getCaption(Resources res, int value) {
if (value > 0 && value < 100) {
return res.getString(R.string.battery_saver_turn_on_automatically_pct,
Utils.formatPercentage(value));
}
return res.getString(R.string.battery_saver_turn_on_automatically_never);
}
};
mTriggerPref.init(this);
mPowerManager = (PowerManager) mContext.getSystemService(Context.POWER_SERVICE);
}
@Override
public void onDestroyView() {
super.onDestroyView();
mSwitchBar.hide();
}
@Override
public void onResume() {
super.onResume();
mSettingsObserver.setListening(true);
mReceiver.setListening(true);
if (!mValidListener) {
mSwitchBar.addOnSwitchChangeListener(this);
mValidListener = true;
}
updateSwitch();
}
@Override
public void onPause() {
super.onPause();
mSettingsObserver.setListening(false);
mReceiver.setListening(false);
if (mValidListener) {
mSwitchBar.removeOnSwitchChangeListener(this);
mValidListener = false;
}
}
@Override
public void onSwitchChanged(Switch switchView, boolean isChecked) {
mHandler.removeCallbacks(mStartMode);
if (isChecked) {
mHandler.postDelayed(mStartMode, WAIT_FOR_SWITCH_ANIM);
} else {
if (DEBUG) Log.d(TAG, "Stopping low power mode from settings");
trySetPowerSaveMode(false);
}
}
private void trySetPowerSaveMode(boolean mode) {
if (!mPowerManager.setPowerSaveMode(mode)) {
if (DEBUG) Log.d(TAG, "Setting mode failed, fallback to current value");
mHandler.post(mUpdateSwitch);
}
}
private void updateSwitch() {
final boolean mode = mPowerManager.isPowerSaveMode();
if (DEBUG) Log.d(TAG, "updateSwitch: isChecked=" + mSwitch.isChecked() + " mode=" + mode);
if (mode == mSwitch.isChecked()) return;
// set listener to null so that that code below doesn't trigger onCheckedChanged()
if (mValidListener) {
mSwitchBar.removeOnSwitchChangeListener(this);
}
mSwitch.setChecked(mode);
if (mValidListener) {
mSwitchBar.addOnSwitchChangeListener(this);
}
}
private final Runnable mUpdateSwitch = new Runnable() {
@Override
public void run() {
updateSwitch();
}
};
private final Runnable mStartMode = new Runnable() {
@Override
public void run() {
AsyncTask.execute(new Runnable() {
@Override
public void run() {
if (DEBUG) Log.d(TAG, "Starting low power mode from settings");
trySetPowerSaveMode(true);
}
});
}
};
private final class Receiver extends BroadcastReceiver {
private boolean mRegistered;
@Override
public void onReceive(Context context, Intent intent) {
if (DEBUG) Log.d(TAG, "Received " + intent.getAction());
mHandler.post(mUpdateSwitch);
}
public void setListening(boolean listening) {
if (listening && !mRegistered) {
mContext.registerReceiver(this, new IntentFilter(ACTION_POWER_SAVE_MODE_CHANGING));
mRegistered = true;
} else if (!listening && mRegistered) {
mContext.unregisterReceiver(this);
mRegistered = false;
}
}
}
private final class SettingsObserver extends ContentObserver {
private final Uri LOW_POWER_MODE_TRIGGER_LEVEL_URI
= Global.getUriFor(Global.LOW_POWER_MODE_TRIGGER_LEVEL);
public SettingsObserver(Handler handler) {
super(handler);
}
@Override
public void onChange(boolean selfChange, Uri uri) {
if (LOW_POWER_MODE_TRIGGER_LEVEL_URI.equals(uri)) {
mTriggerPref.update(mContext);
}
}
public void setListening(boolean listening) {
final ContentResolver cr = getContentResolver();
if (listening) {
cr.registerContentObserver(LOW_POWER_MODE_TRIGGER_LEVEL_URI, false, this);
} else {
cr.unregisterContentObserver(this);
}
}
}
}
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