private static final String BACKPARA = "ae-mode=1;ae-mode-values=1,2,3,4,5,6,7,8,9,10,11,13,14,15,16,17,18,19,20,21," +
            "22;af-draw=0;af-x=0;af-y=0;afeng-mode=0;afeng-pos=0;antibanding=auto;antibanding-values=60hz,50hz,auto,off;" +
            "auto-exposure-lock-supported=true;auto-whitebalance-lock-supported=true;awb-2pass=on;awb-2pass-values=off,on;" +
            "brightness=middle;brightness-values=low,middle,high;burst-num=1;mtk-cam-mode=0;cap-mode=normal;cap-mode-values=" +
            "normal,continuousshot,smileshot,bestshot,evbracketshot,mav,hdr,autorama,asd,pano_3d,single_3d,face_beauty;" +
            "capfname=/sdcard/DCIM/cap00;contrast=middle;contrast-values=low,middle,high;edge=middle;edge-values=low," +
            "middle,high;effect=none;effect-values=none,mono,sepia,negative,aqua,blackboard,whiteboard;exposure=0;" +
            "exposure-compensation=0;exposure-compensation-step=1.0;exposure-meter=center;exposure-meter-values=center," +
            "spot,average;exposure-values=0,1,2,3,-1,-2,-3;fast-continuous-shot=off;fast-continuous-shot-values=off,on;" +
            "focal-length=3.5;focus-distances=0.95,1.9,Infinity;focus-meter=spot;focus-meter-values=spot,multi;" +
            "focus-mode=auto;focus-mode-values=auto,continuous-picture,continuous-video,macro,infinity,manual,fullscan;" +
            "horizontal-view-angle=360;hue=middle;hue-values=low,middle,high;iso-speed=auto;iso-speed-eng=0;" +
            "iso-speed-values=auto,100,200,400,800,1600;isp-mode=0;jpeg-quality=85;jpeg-thumbnail-height=120;" +
            "jpeg-thumbnail-quality=85;jpeg-thumbnail-size-values=0x0,160x120,320x240;jpeg-thumbnail-width=160;" +
            "max-exposure-compensation=3;max-num-detected-faces-hw=15;max-num-detected-faces-sw=0;max-num-focus-areas=1;" +
            "max-num-metering-areas=1;max-zoom=10;min-exposure-compensation=-3;pano-dir=right;pano-idx=0;" +
            "picture-format=jpeg;picture-format-values=jpeg;picture-size=2560x1920;picture-size-values=640x480,1280x768," +
            "1280x960,1600x1200,2048x1536,2560x1712,2560x1920;preview-format=yuv420sp;preview-format-values=yuv420sp,yuv420p," +
            "yuv420i-yyuvyy-3plane;preview-fps-range=5000,30000;preview-fps-range-values=(5000,30000);" +
            "preview-frame-rate=30;preview-frame-rate-values=15,24,30;preview-size=640x480;preview-size-values=176x144," +
            "320x240,352x288,432x320,480x320,480x368,640x480,720x480,728x480,782x480,800x480,854x480,800x600,864x480,888x540,960x540,1280x720,1920x1088;" +
            "prv-int-fmt=yuv420i-yyuvyy-3plane;rawfname=/sdcard/DCIM/raw00.raw;rawsave-mode=0;rotation=0;" +
            "saturation=middle;saturation-values=low,middle,high;scene-mode=auto;scene-mode-values=auto,portrait," +
            "landscape,night,night-portrait,theatre,beach,snow,sunset,steadyphoto,fireworks,sports,party,candlelight;" +
            "smooth-zoom-supported=false;stereo3d-image-format=jps;stereo3d-image-format-values=jps,mpo;stereo3d-mode=off;" +
            "stereo3d-mode-values=off,on;stereo3d-picture-size=2560x720;stereo3d-picture-size-values=2560x720;" +
            "stereo3d-preview-size=640x360;stereo3d-preview-size-values=640x360,854x480,960x540,1280x720;" +
            "stereo3d-type=off;stereo3d-type-values=off;tv-delay=240;vertical-view-angle=360;video-stabilization=false;" +
            "video-stabilization-supported=true;video-stabilization-values=false,true;whitebalance=auto;" +
            "whitebalance-values=auto,daylight,cloudy-daylight,shade,twilight,fluorescent,warm-fluorescent,incandescent;" +
            "zoom=0;zoom-ratios=100,114,132,151,174,200,229,263,303,348,400;zoom-supported=true;zsd-mode=on;" +
            "zsd-mode-values=off,on;zsd-supported=true";