Question

如何在Android中创建或快或慢的相机闪光灯闪烁信号

Answer 1

Camera camera = Camera.open();
Parameters p = camera.getParameters();
//手电筒闪光开启
private void processOnFlash(){
p.setFlashMode(Parameters.FLASH_MODE_TORCH);
camera.setParameters(p);
camera.startPreview();
}
//手电筒闪光关闭
private void processOffFlash(){
p.setFlashMode(Parameters.FLASH_MODE_OFF);
camera.setParameters(p);
camera.stopPreview();
}
注意的是要及时释放Camera

//及时释放
public void surfaceDestroyed(SurfaceHolder holder) {
camera.setPreviewCallback(null);
camera.stopPreview();
camera.release();
camera = null;