android设备计算密度，宽高！

importandroid.app.Activity;
importandroid.os.Bundle;
importandroid.util.DisplayMetrics;
publicclassMainActivityextendsActivity{
//屏幕的宽高,单位像素
privateintscreenWidth;
privateintscreenHeight;
//屏幕的密度
privatefloatdensity;//只有五种情况:0.75/1.0/1.5/2.0/3.0
privateintdensityDpi;//只有五种情况:120/160/240/320/480
//水平垂直精确密度
privatefloatxdpi;//水平方向上的准确密度,即每英寸的像素点
privatefloatydpi;//垂直方向上的准确密度,即没音村的像素点
@Override
protectedvoidonCreate(BundlesavedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
//getPixelWindowManager();
//getPixelDisplayMetrics();
getPixelDisplayMetricsII();
System.out.println("宽:"+screenWidth+",高:"+screenHeight);
System.out.println("密度density:"+density+",densityDpi:"+densityDpi);
System.out.println("精确密度xdpi:"+xdpi+",ydpi:"+ydpi);
}
privatevoidgetPixelWindowManager(){
screenWidth=getWindowManager().getDefaultDisplay().getWidth();
screenHeight=getWindowManager().getDefaultDisplay().getHeight();
}
privatevoidgetPixelDisplayMetrics(){
DisplayMetricsdm=newDisplayMetrics();
dm=getResources().getDisplayMetrics();
screenWidth=dm.widthPixels;
screenHeight=dm.heightPixels;
density=dm.density;
densityDpi=dm.densityDpi;
xdpi=dm.xdpi;
ydpi=dm.ydpi;
}
privatevoidgetPixelDisplayMetricsII(){
DisplayMetricsdm=newDisplayMetrics();
getWindowManager().getDefaultDisplay().getMetrics(dm);
screenWidth=dm.widthPixels;
screenHeight=dm.heightPixels;
density=dm.density;
densityDpi=dm.densityDpi;
xdpi=dm.xdpi;
ydpi=dm.ydpi;
}
}

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