78 lines
2.7 KiB
Java
78 lines
2.7 KiB
Java
package com.ttstd.dialer.utils;
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import android.content.Context;
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import android.content.res.Configuration;
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import android.content.res.Resources;
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import android.util.Log;
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import java.lang.reflect.Method;
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public class ScreenUtils {
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private static final String TAG = "ScreenUtils";
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/**
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* 根据手机的分辨率从 dp 的单位 转成为 px(像素)
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*/
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public static int dip2px(Context context, float dpValue) {
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final float scale = context.getResources().getDisplayMetrics().density;
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return (int) (dpValue * scale + 0.5f);
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}
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/**
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* 根据手机的分辨率从 px(像素) 的单位 转成为 dp
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*/
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public static int px2dip(Context context, float pxValue) {
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final float scale = context.getResources().getDisplayMetrics().density;
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return (int) (pxValue / scale + 0.5f);
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}
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public static int dp2px(Resources resources, float dp) {
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final float scale = resources.getDisplayMetrics().density;
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return (int) (dp * scale + 0.5f);
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}
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public static int sp2px(Resources resources, float sp) {
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final float scale = resources.getDisplayMetrics().scaledDensity;
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return (int) (sp * scale);
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}
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/**
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* 应用需反射调用
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*/
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public static boolean isTablet() {
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try {
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// 1. 反射获取 SystemProperties 类
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Class<?> systemPropertiesClass = Class.forName("android.os.SystemProperties");
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// 2. 获取 get(String key) 方法
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Method getMethod = systemPropertiesClass.getDeclaredMethod("get", String.class);
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// 3. 调用方法获取属性值
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String characteristics = (String) getMethod.invoke(null, "ro.build.characteristics");
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Log.e(TAG, "isTablet: " + characteristics);
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// 4. 判断是否包含 "tablet" 标识
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return characteristics != null && characteristics.contains("tablet");
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} catch (Exception e) {
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// 反射失败时的处理（如属性不存在或权限问题）
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Log.e(TAG, "Reflection failed: " + e.getMessage());
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return false;
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}
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}
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public static boolean isTablet(Context context) {
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boolean isTablet = (context.getResources().getConfiguration().screenLayout & Configuration.SCREENLAYOUT_SIZE_MASK) >= Configuration.SCREENLAYOUT_SIZE_LARGE;
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Log.e(TAG, "isTablet: " + isTablet);
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return isTablet;
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}
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/**
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* 是否是平板
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*
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* @param context 上下文
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* @return 是平板则返回true，反之返回false
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*/
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public static boolean isPad(Context context) {
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return (context.getResources().getConfiguration().screenLayout
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& Configuration.SCREENLAYOUT_SIZE_MASK) >= Configuration.SCREENLAYOUT_SIZE_LARGE;
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}
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}
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