设置控件的随机显示位置 setlayoutparams

RelativeLayout.LayoutParams parms=(RelativeLayout.LayoutParams)img.getLayoutParams();
parms.leftMargin = (int) (Math.random() * 320);
parms.topMargin = (int) (Math.random() * 480);

img.setLayoutParams(parms);
img.invalidate();

private RelativeLayout.LayoutParams getOtherSetLayoutParameter() {
		    	int height =190;
		        int width = 310;		        
		        DisplayMetrics dm=getResources().getDisplayMetrics();
		        if(dm.densityDpi == DisplayMetrics.DENSITY_HIGH){
		        	height = height*DisplayMetrics.DENSITY_HIGH/DisplayMetrics.DENSITY_MEDIUM;
		        	width = width*DisplayMetrics.DENSITY_HIGH/DisplayMetrics.DENSITY_MEDIUM;
		        }
		        else if(dm.densityDpi == DisplayMetrics.DENSITY_LOW){
		        	height = height*DisplayMetrics.DENSITY_LOW/DisplayMetrics.DENSITY_MEDIUM;
		        	width = width*DisplayMetrics.DENSITY_LOW/DisplayMetrics.DENSITY_MEDIUM;
		        }
		        RelativeLayout.LayoutParams lp = new RelativeLayout.LayoutParams(width, height);
		        int screenWidth=dm.widthPixels;
		        int screenHeight=dm.heightPixels;		       
		        lp.topMargin = screenHeight/2-height/2;
		        lp.leftMargin = screenWidth/2-width/2;
		        
		        return lp;
		    }

XXX.addView(mOthersetModeLayout,getOtherSetLayoutParameter());

把上面的代码精简一下：

private RelativeLayout.LayoutParams getOtherSetLayoutParameter() {
RelativeLayout.LayoutParams lp = new RelativeLayout.LayoutParams(310, 248);
lp.addRule(RelativeLayout.CENTER_IN_PARENT);
return lp;
}