Android - UiUtil工具类

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功能：相机打开

代码：

package com.mandaotech.ewallet.android.util;

import android.app.ActivityManager;
import android.content.Context;
import android.content.Intent;
import android.widget.Toast;

import java.util.List;

/**
 * 界面工具类
 * Created by zst on 2018/3/16.
 */

public class UiUtil {
    public static void showProgressDialog(Context context){

    }

    /**
     * Toast
     * @param context
     * @param msg
     */
    public static void showToast(Context context, String msg) {
        Toast.makeText(context, msg, Toast.LENGTH_SHORT).show();
    }

    /**
     * dip转换px
     *
     * @param dip
     * @return
     */
    public static int dip2px(Context context, int dip) {
        final float scale = context.getResources().getDisplayMetrics().density;
        return (int) (dip * scale + 0.5f);
    }

    /**
     * px转换dip
     *
     * @param px
     * @return
     */
    public static int px2dip(Context context, int px) {
        final float scale = context.getResources().getDisplayMetrics().density;
        return (int) (px / scale + 0.5f);
    }

    /**
     * 将px值转换为sp值，保证文字大小不变
     *
     * @param pxValue
     * @return
     */
    public static int px2sp(Context context, float pxValue) {
        final float fontScale = context.getResources().getDisplayMetrics().scaledDensity;
        return (int) (pxValue / fontScale + 0.5f);
    }

    /**
     * 将sp值转换为px值，保证文字大小不变
     *
     * @param spValue
     * @return
     */
    public static int sp2px(Context context, float spValue) {
        final float fontScale = context.getResources().getDisplayMetrics().scaledDensity;
        return (int) (spValue * fontScale + 0.5f);
    }

    /**
     * 判断activity是否在最顶层
     * @param context
     * @param intent
     * @return
     */
    public static boolean isTop(Context context, Intent intent) {
        ActivityManager am = (ActivityManager) context.getSystemService(context.ACTIVITY_SERVICE);
        List<ActivityManager.RunningTaskInfo> appTask = am.getRunningTasks(1);
        if (appTask.size() > 0 && appTask.get(0).topActivity.equals(intent.getComponent())) {
            return true;
        }else {
            return false;
        }
    }
}

jar包：无