package com.hdl.photovoltaic.utils;
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import android.content.Context;
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import android.content.pm.FeatureInfo;
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import android.content.pm.PackageManager;
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import android.hardware.camera2.CameraAccessException;
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import android.hardware.camera2.CameraCharacteristics;
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import android.hardware.camera2.CameraManager;
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import android.os.Build;
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import android.hardware.Camera;
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import android.text.method.Touch;
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import java.util.Optional;
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public class FlashLightUtils {
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private CameraManager manager;
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private Camera mCamera = null;
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private Context context;
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private boolean status = false; // 记录手机状态
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public FlashLightUtils(Context context) {
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if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
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manager = (CameraManager) context.getSystemService(Context.CAMERA_SERVICE);
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}
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this.context = context;
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}
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// 打开手电筒
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public void open() {
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if (status) { //如果是打开状态,不需要打开
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return;
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}
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if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.P) {
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try {
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manager.setTorchMode("0", true);
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} catch (CameraAccessException e) {
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e.printStackTrace();
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}
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} else {
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PackageManager packageManager = context.getPackageManager();
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FeatureInfo[] features = packageManager.getSystemAvailableFeatures();
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for (FeatureInfo featureInfo : features) {
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// 判断设备是否支持闪光灯
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if (PackageManager.FEATURE_CAMERA_FLASH.equals(featureInfo.name)) {
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if (null == mCamera) {
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mCamera = Camera.open();
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}
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Camera.Parameters parameters = mCamera.getParameters();
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parameters.setFlashMode(Camera.Parameters.FLASH_MODE_TORCH);
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mCamera.setParameters(parameters);
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mCamera.startPreview();
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}
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}
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}
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status = true; // 记录手电筒状态为打开
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}
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// 关闭手电筒
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public void close() {
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if (!status) // 如果是已经关闭的状态 不需要打开
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{
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return;
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}
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if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.P) {
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try {
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manager.setTorchMode("0", false);
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} catch (CameraAccessException e) {
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e.printStackTrace();
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}
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} else {
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if (mCamera != null) {
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mCamera.stopPreview();
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mCamera.release();
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mCamera = null;
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}
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}
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status = false; // 记录手电筒为关闭
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}
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/**
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* 手电筒打开或者关闭
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*
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* @param isOpen 打开(true)或者关闭(false)
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*/
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public void setOpenOrClose(boolean isOpen) {
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try {
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//获取当前手机所有摄像头设备ID
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String[] ids = manager.getCameraIdList();
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for (String id : ids) {
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CameraCharacteristics c = manager.getCameraCharacteristics(id);
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//查询该摄像头组件是否包含闪光灯
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Boolean flashAvailable = c.get(CameraCharacteristics.FLASH_INFO_AVAILABLE);
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/*
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* 获取相机面对的方向
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* CameraCharacteristics.LENS_FACING_FRONT 前置摄像头
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* CameraCharacteristics.LENS_FACING_BACK 后只摄像头
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* CameraCharacteristics.LENS_FACING_EXTERNAL 外部的摄像头
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*/
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Integer lensFacing = c.get(CameraCharacteristics.LENS_FACING);
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if (flashAvailable != null && flashAvailable
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&& lensFacing != null && lensFacing == CameraCharacteristics.LENS_FACING_BACK) {
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//打开或关闭手电筒
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manager.setTorchMode(id, isOpen);
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break;
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}
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}
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} catch (CameraAccessException e) {
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e.printStackTrace();
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}
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}
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}
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