android Camera 变焦设置

1、添加Camera权限

2、判断是否支持变焦

public boolean isSupportZoom()
    {
        boolean isSuppport = true;
        if (mCamera.getParameters().isSmoothZoomSupported())
        {
            isSuppport = false;
        }
        return isSuppport;
    }

3、修改焦距

public void setZoom()
    {
        if (mIsSupportZoom)
        {
            try
            {
                Parameters params = mCamera.getParameters();
                final int MAX = params.getMaxZoom();
           if(MAX==0)return;
int zoomValue = params.getZoom(); Trace.Log("-----------------MAX:"+MAX+" params : "+zoomValue); zoomValue += 5; params.setZoom(zoomValue); mCamera.setParameters(params); Trace.Log("Is support Zoom " + params.isZoomSupported()); } catch (Exception e) { Trace.Log("--------exception zoom"); e.printStackTrace(); } } else { Trace.Log("--------the phone not support zoom"); } }

4、存在系统相机可以变焦,自定义相机不可以的情况,目前无法解决

参考链接:

http://blog.csdn.net/fuuckwtu/article/details/7068072

 

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