UIUtils.java

package cn.bingoogolapple.weibo.util;

import android.content.Context;
import android.content.res.Resources;
import android.util.DisplayMetrics;
import android.util.TypedValue;
import android.view.WindowManager;

import java.lang.reflect.Method;

/**
 * 作者:王浩 邮件:bingoogolapple@gmail.com
 * 创建时间:15/7/3 上午12:53
 * 描述:
 */
public class UIUtils {
    
    private UIUtils() {
    }

    public static int dp2px(Context context, float dpValue) {
        return (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, dpValue, context.getResources().getDisplayMetrics());
    }

    public static int sp2px(Context context, float spValue) {
        return (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_SP, spValue, context.getResources().getDisplayMetrics());
    }

    public static int getStatusBarHeight(Context context) {
        Resources resources = context.getResources();
        int resourceId = resources.getIdentifier("status_bar_height", "dimen", "android");
        return resources.getDimensionPixelSize(resourceId);
    }

    public static int getNavigationBarHeight(Context context) {
        int navigationBarHeight = 0;
        Resources resources = context.getResources();
        int resourceId = resources.getIdentifier("status_bar_height", "dimen", "android");
        if (resourceId > 0 && checkDeviceHasNavigationBar(context)) {
            navigationBarHeight = resources.getDimensionPixelSize(resourceId);
        }
        return navigationBarHeight;
    }

    public static boolean checkDeviceHasNavigationBar(Context context) {
        boolean hasNavigationBar = false;
        Resources rs = context.getResources();
        int id = rs.getIdentifier("config_showNavigationBar", "bool", "android");
        if (id > 0) {
            hasNavigationBar = rs.getBoolean(id);
        }
        try {
            Class systemPropertiesClass = Class.forName("android.os.SystemProperties");
            Method m = systemPropertiesClass.getMethod("get", String.class);
            String navBarOverride = (String) m.invoke(systemPropertiesClass, "qemu.hw.mainkeys");
            if ("1".equals(navBarOverride)) {
                hasNavigationBar = false;
            } else if ("0".equals(navBarOverride)) {
                hasNavigationBar = true;
            }
        } catch (Exception e) {
        }
        return hasNavigationBar;
    }

    public static int getScreenWidth(Context context) {
        WindowManager windowManager = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);
        DisplayMetrics dm = new DisplayMetrics();
        windowManager.getDefaultDisplay().getMetrics(dm);
        return dm.widthPixels;
    }

    public static int getHalfScreenWidth(Context context) {
        return getScreenWidth(context) / 2;
    }

    public static int getScreenHeight(Context context) {
        WindowManager windowManager = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);
        DisplayMetrics dm = new DisplayMetrics();
        windowManager.getDefaultDisplay().getMetrics(dm);
        return dm.heightPixels;
    }

    public static int getHalfScreenHeight(Context context) {
        return getScreenHeight(context) / 2;
    }

}