獲取Android設備屏幕寬、高、dpi密度及橫豎屏等參數

獲取Android設備屏幕寬、高、dpi密度及橫豎屏等參數。

功能

獲取Android設備屏幕寬、高、dpi密度及橫豎屏等參數

代碼

/**
* 系統參數類
*
* @author wader
*
*/
public class MySystemParams {
private final String TAG = "SystemParams";
private static MySystemParams params;
public int screenWidth;// 屏幕寬度，單位為px
public int screenHeight;// 屏幕高度，單位為px
public int densityDpi;// 屏幕密度，單位為dpi
public float scale;// 縮放系數，值為 densityDpi/160
public float fontScale;// 文字縮放系數，同scale

public final static int SCREEN_ORIENTATION_VERTICAL = 1; // 屏幕狀態：橫屏
public final static int SCREEN_ORIENTATION_HORIZONTAL = 2; // 屏幕狀態：豎屏
public int screenOrientation = SCREEN_ORIENTATION_VERTICAL;// 當前屏幕狀態，默認為豎屏

/**
* 私有構造方法
*
* @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;
}

/**
* 獲取實例
*
* @param activity
* @return
*/
public static MySystemParams getInstance(Activity activity) {
if (params == null) {
params = new MySystemParams(activity);
}
return params;
}

/**
* 獲取一個新實例
*
* @param activity
* @return
*/
public static MySystemParams getNewInstance(Activity activity) {
if (params != null) {
params = null;
}
return getInstance(activity);
}

/**
* 參數信息
*/
public String toString() {

return TAG
+ ":[screenWidth: "
+ screenWidth
+ " screenHeight: "
+ screenHeight
+ " scale: "
+ scale
+ " fontScale: "
+ fontScale
+ " densityDpi: "
+ densityDpi
+ " screenOrientation: "
+ (screenOrientation == SCREEN_ORIENTATION_VERTICAL ? "vertical"
: "horizontal") + "]";
}
}