android Camera 设置焦距

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");}}