一个简单的手电筒APP源码分享（支持Android O(8.0)及以下版本）

╰半夏微凉° 2022-05-31 08:58 187阅读 0赞

## 一个简单的手电筒APP（无闪光灯的设备开启屏幕照明模式） ##

### GitHub地址： ###

> [https://github.com/djzhao627/SimpleTorch][https_github.com_djzhao627_SimpleTorch]

### 打包下载 ###

> [http://download.csdn.net/download/djzhao627/10252280][http_download.csdn.net_download_djzhao627_10252280]

### 代码分析 ###

#### Android 5及以下 ####

需要使用类： `android.hardware.Camera`

*  打开手电

private Camera camera;
    camera = Camera.open();
    Camera.Parameters parameters = camera.getParameters(); parameters.setFlashMode(Camera.Parameters.FLASH_MODE_TORCH);
    camera.setParameters(parameters);
    camera.startPreview();

*  关闭手电

if (camera == null) {
        return;
    }
    camera.stopPreview();
    camera.release();

#### Android 6及以上 ####

需要使用类： `android.hardware.camera2.CameraManager`

*  打开手电

try {
        private CameraManager manager;
        manager = (CameraManager) this.getSystemService(Context.CAMERA_SERVICE);
        manager.setTorchMode("0", true);// "0"是主闪光灯
    } catch (Exception e) {}

*  关闭手电

try {
        if (manager == null) {
            return;
        }
        manager.setTorchMode("0", false);
    } catch (Exception e) {}

#### 使用屏幕照明 ####

就是调节屏幕亮度，最好使用白色背景

private void screenLight() {
        Window localWindow = this.getWindow();
        WindowManager.LayoutParams params = localWindow.getAttributes();
        params.screenBrightness = 1.0f;
        localWindow.setAttributes(params);
    }

[https_github.com_djzhao627_SimpleTorch]: https://github.com/djzhao627/SimpleTorch
[http_download.csdn.net_download_djzhao627_10252280]: http://download.csdn.net/download/djzhao627/10252280