获取Android设备屏幕宽、高、dpi密度及横竖屏等参数。
- 功能
- 获取Android设备屏幕宽、高、dpi密度及横竖屏等参数
- 代码
- /**
- * 系统参数类
- *
- * @author wader
- *
- */
- public class MySystemParams {
- private final String TAG = "SystemParams";
- private static MySystemParams params;
- public int screenWidth;// 屏幕宽度,单位为px
- public int screenHeight;// 屏幕高度,单位为px
- public int densityDpi;// 屏幕密度,单位为dpi
- public float scale;// 缩放系数,值为 densityDpi/160
- public float fontScale;// 文字缩放系数,同scale
- public final static int SCREEN_ORIENTATION_VERTICAL = 1; // 屏幕状态:横屏
- public final static int SCREEN_ORIENTATION_HORIZONTAL = 2; // 屏幕状态:竖屏
- public int screenOrientation = SCREEN_ORIENTATION_VERTICAL;// 当前屏幕状态,默认为竖屏
- /**
- * 私有构造方法
- *
- * @param activity
- */
- private MySystemParams(Activity activity) {
- DisplayMetrics dm = new DisplayMetrics();
- activity.getWindowManager().getDefaultDisplay().getMetrics(dm);
- screenWidth = dm.widthPixels;
- screenHeight = dm.heightPixels;
- densityDpi = dm.densityDpi;
- scale = dm.density;
- fontScale = dm.scaledDensity;
- screenOrientation = screenHeight > screenWidth ? SCREEN_ORIENTATION_VERTICAL
- : SCREEN_ORIENTATION_HORIZONTAL;
- }
- /**
- * 获取实例
- *
- * @param activity
- * @return
- */
- public static MySystemParams getInstance(Activity activity) {
- if (params == null) {
- params = new MySystemParams(activity);
- }
- return params;
- }
- /**
- * 获取一个新实例
- *
- * @param activity
- * @return
- */
- public static MySystemParams getNewInstance(Activity activity) {
- if (params != null) {
- params = null;
- }
- return getInstance(activity);
- }
- /**
- * 参数信息
- */
- public String toString() {
- return TAG
- + ":[screenWidth: "
- + screenWidth
- + " screenHeight: "
- + screenHeight
- + " scale: "
- + scale
- + " fontScale: "
- + fontScale
- + " densityDpi: "
- + densityDpi
- + " screenOrientation: "
- + (screenOrientation == SCREEN_ORIENTATION_VERTICAL ? "vertical"
- : "horizontal") + "]";
- }
- }
来源: http://www.phpxs.com/code/1002782/