Android Camera變焦編程步驟

1、添加Camera權限

2、判斷是否支持變焦
復制代碼 代碼如下:
public boolean isSupportZoom()
    {
        boolean isSuppport = true;
        if (mCamera.getParameters().isSmoothZoomSupported())
        {
            isSuppport = false;
        }
        return isSuppport;
    }

3、修改焦距
復制代碼 代碼如下:
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、存在系統相機可以變焦，自定義相機不可以的情況，目前無法解決