Question

So many LED flashlight API questions for Android. I m afraid to ask yet another, but here goes..

利用受审判和真正的讲卫生运动我能对我的三星银河SII感到满意,并看到LED闪电。在我的朋友Galaxy Nexus上,没有这样的uck。我的其他朋友也不是Droid X。

I m noticing for a not insignificant number of devices specific native IOCTL calls seem to be required. Is this the case for the Galaxy Nexus? How do I find a reference to program it?

我正在采用标准FLASH_MODE_TORCH/“flash-mode”=“torch”,即启动Preview()链。

Kind本标准文本似乎完全如此普及。

Answer 1

我发现的是,有些装置需要表面上听从LED。

SurfaceView preview = (SurfaceView) findViewById(R.id.PREVIEW);
SurfaceHolder mHolder = preview.getHolder();
mHolder.addCallback(this);
Camera mCamera = Camera.open();
mCamera.setPreviewDisplay(mHolder);

// Turn on LED  
Parameters params = mCamera.getParameters();
params.setFlashMode(Parameters.FLASH_MODE_TORCH);
mCamera.setParameters(params);      
mCamera.startPreview();

...

// Turn off LED
Parameters params = mCamera.getParameters();
params.setFlashMode(Parameters.FLASH_MODE_OFF);
mCamera.setParameters(params);
mCamera.stopPreview();
mCamera.release();

你的活动需要执行水稻。反馈:

public void surfaceChanged(SurfaceHolder holder, int format, int width,
        int height) {}

public void surfaceCreated(SurfaceHolder holder) {
    mHolder = holder;
    mCamera.setPreviewDisplay(mHolder);
}

public void surfaceDestroyed(SurfaceHolder holder) {
    mCamera.stopPreview();
    mHolder = null;
}

The surfaceview has to be visible, android:visibility="invisible" or a height and width of 0 won t work. Unfortunately I didn t find a good solution to hide it, so I just gave it a size of 1x1dip and positioned it underneath a button..

**(对上述段落加以扩充[但认为其有用]不够回答] 在你目前内容观点的XML中,你希望:

<SurfaceView
    android:id="@+id/PREVIEW"
    android:layout_width="1dip"
    android:layout_height="1dip"/>

如果你在“亲属关系”内有这种联系,那么你也能够使ParentLeft/Bottom在一角 t。这种方法适用于我的银河Nexus,但它为Droid X(更新621条,任何一条路)提出了一个已知的问题(电话线),并且没有处理地雷问题。答案大, t!

友情链接