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

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：

打包下载

代码分析

Android 5及以下

android.hardware.Camera

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

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

Android 6及以上

android.hardware.camera2.CameraManager

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

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

使用屏幕照明

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