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/*
* Copyright (C) 2018 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.flashlight;
import static android.app.slice.Slice.EXTRA_TOGGLE_STATE;
import static androidx.slice.builders.ListBuilder.ICON_IMAGE;
import android.annotation.ColorInt;
import android.app.PendingIntent;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.hardware.camera2.CameraAccessException;
import android.hardware.camera2.CameraCharacteristics;
import android.hardware.camera2.CameraManager;
import android.net.Uri;
import android.provider.Settings;
import android.provider.Settings.Secure;
import android.util.Log;
import androidx.core.graphics.drawable.IconCompat;
import androidx.slice.Slice;
import androidx.slice.builders.ListBuilder;
import androidx.slice.builders.ListBuilder.RowBuilder;
import androidx.slice.builders.SliceAction;
import com.android.internal.annotations.VisibleForTesting;
import com.android.settings.R;
import com.android.settings.Utils;
import com.android.settings.slices.CustomSliceRegistry;
import com.android.settings.slices.CustomSliceable;
/**
* Utility class to build a Flashlight Slice, and handle all associated actions.
*/
public class FlashlightSlice implements CustomSliceable {
private static final String TAG = "FlashlightSlice";
/**
* Action broadcasting a change on whether flashlight is on or off.
*/
private static final String ACTION_FLASHLIGHT_CHANGED =
"com.android.settings.flashlight.action.FLASHLIGHT_CHANGED";
private final Context mContext;
public FlashlightSlice(Context context) {
mContext = context;
}
@Override
public Slice getSlice() {
if (!isFlashlightAvailable(mContext)) {
return null;
}
final PendingIntent toggleAction = getBroadcastIntent(mContext);
@ColorInt final int color = Utils.getColorAccentDefaultColor(mContext);
final IconCompat icon =
IconCompat.createWithResource(mContext, R.drawable.ic_signal_flashlight);
return new ListBuilder(mContext, CustomSliceRegistry.FLASHLIGHT_SLICE_URI,
ListBuilder.INFINITY)
.setAccentColor(color)
.addRow(new RowBuilder()
.setTitle(mContext.getText(R.string.power_flashlight))
.setTitleItem(icon, ICON_IMAGE)
.setPrimaryAction(
SliceAction.createToggle(toggleAction, null,
isFlashlightEnabled(mContext))))
.build();
}
@Override
public Uri getUri() {
return CustomSliceRegistry.FLASHLIGHT_SLICE_URI;
}
@Override
public IntentFilter getIntentFilter() {
return new IntentFilter(ACTION_FLASHLIGHT_CHANGED);
}
@Override
public void onNotifyChange(Intent intent) {
try {
final String cameraId = getCameraId(mContext);
if (cameraId != null) {
final boolean state = intent.getBooleanExtra(
EXTRA_TOGGLE_STATE, isFlashlightEnabled(mContext));
final CameraManager cameraManager = mContext.getSystemService(CameraManager.class);
cameraManager.setTorchMode(cameraId, state);
}
} catch (CameraAccessException e) {
Log.e(TAG, "Camera couldn't set torch mode.", e);
}
mContext.getContentResolver().notifyChange(CustomSliceRegistry.FLASHLIGHT_SLICE_URI, null);
}
@Override
public Intent getIntent() {
return null;
}
private static String getCameraId(Context context) throws CameraAccessException {
final CameraManager cameraManager = context.getSystemService(CameraManager.class);
final String[] ids = cameraManager.getCameraIdList();
for (String id : ids) {
CameraCharacteristics c = cameraManager.getCameraCharacteristics(id);
Boolean flashAvailable = c.get(CameraCharacteristics.FLASH_INFO_AVAILABLE);
Integer lensFacing = c.get(CameraCharacteristics.LENS_FACING);
if (flashAvailable != null && flashAvailable
&& lensFacing != null && lensFacing == CameraCharacteristics.LENS_FACING_BACK) {
return id;
}
}
return null;
}
@VisibleForTesting
static boolean isFlashlightAvailable(Context context) {
int defaultAvailability = 0;
try {
// check if there is a flash unit
if (getCameraId(context) != null) {
defaultAvailability = 1;
}
} catch (CameraAccessException e) {
Log.e(TAG, "Error getting camera id.", e);
}
return Secure.getInt(context.getContentResolver(),
Secure.FLASHLIGHT_AVAILABLE, defaultAvailability) == 1;
}
private static boolean isFlashlightEnabled(Context context) {
return Settings.Secure.getInt(
context.getContentResolver(), Secure.FLASHLIGHT_ENABLED, 0) == 1;
}
}
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