闪光灯 7.0处理

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最新推荐文章于 2024-03-29 14:18:05 发布

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本文链接：https://blog.youkuaiyun.com/qq_36488374/article/details/103493498

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package com.example.duqianlong.oabridge.utils;

import android.annotation.TargetApi;
import android.content.Context;
import android.hardware.Camera;
import android.hardware.camera2.CameraAccessException;
import android.hardware.camera2.CameraCharacteristics;
import android.hardware.camera2.CameraManager;
import android.os.Build;
import android.support.annotation.RequiresApi;

/**
 * Created by Duqianlong on 2019/12/11.
 */

public class CameraUtils {
    private Context context;

    public CameraUtils(Context context) {
        this.context = context;
    }

    @TargetApi(Build.VERSION_CODES.N)
    @RequiresApi(api = Build.VERSION_CODES.LOLLIPOP)
    public void changeFlashLight(boolean openOrClose) {
        //判断API是否大于24（安卓7.0系统对应的API）
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
            try {
                //获取CameraManager
                CameraManager mCameraManager = (CameraManager) context.getSystemService(Context.CAMERA_SERVICE);
                //获取当前手机所有摄像头设备ID
                String[] ids  = mCameraManager.getCameraIdList();
                for (String id : ids) {
                    CameraCharacteristics c = mCameraManager.getCameraCharacteristics(id);
                    //查询该摄像头组件是否包含闪光灯
                    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) {
                        //打开或关闭手电筒
                        mCameraManager.setTorchMode(id, openOrClose);
                    }
                }
            } catch (CameraAccessException e) {
                e.printStackTrace();
            }
        }else{
            Camera camera = Camera.open();
            Camera.Parameters parameters = camera.getParameters();
            if (openOrClose){
                //打开闪光灯
                parameters.setFlashMode(Camera.Parameters.FLASH_MODE_TORCH);//开启
                camera.setParameters(parameters);
            }else{
                //关闭闪光灯
                parameters.setFlashMode(Camera.Parameters.FLASH_MODE_OFF);//关闭
                camera.setParameters(parameters);
            }
        }
    }
}

传值 true 打开闪光灯，false 关闭