如何在Android手机中自动捕捉照片？

Question

我开发了一个Android应用程序.因为我使用了前置摄像头功能.它工作正常,但我需要自动捕获.即没有点击快门按钮的声音,我想拍摄光电管..

我的相机活动代码是

 private Camera openFrontFacingCameraGingerbread() { 
    int cameraCount = 0; 
    Camera cam = null; 
    Camera.CameraInfo cameraInfo = new Camera.CameraInfo(); 
    cameraCount = Camera.getNumberOfCameras(); 
    for ( int camIdx = 0; camIdx < cameraCount; camIdx++ ) { 
        Camera.getCameraInfo( camIdx, cameraInfo ); 
        if ( cameraInfo.facing == Camera.CameraInfo.CAMERA_FACING_FRONT  ) { 
            try { 
                cam = Camera.open( camIdx ); 
            } catch (RuntimeException e) { 
                Log.i("Camera failed to open: ",e.getLocalizedMessage()); 
            } 
        } 
    } 
    return cam; 
} 

提前致谢..

Answer 1

按照Android Developer 参考页面中列出的步骤操作.没有要求"快门按钮".如果您不想在屏幕上显示图像,则可以创建虚拟SurfaceHolder,例如

SurfaceView surface = new SurfaceView(context);
cam.setPreviewDisplay(surface.getHolder());