#Java
Android判断当前应用程序状态是在前台还是后台
1 public static boolean isBackground(Context context) { &nb…
#Java
ApachePOI 动态列表生成excel
先创建导出Excel的工具类，并带泛型，实体一定要生成属性的get方法，就是普通的Javabean，后面的就是个人发挥了，废话不多说，直接上代码： public class Exp…
#Java
SpringMVC多文件上传实例
后台Conroller import java.io.File; import java.io.FileInputStream; import java.io.FileOutput…
#Java
Java检测字符串中是否包含汉字
public static boolean checkChinese(String sequence) { final String format = "[\\u4E00…
#Java
获取已经安装APK的路径
PackageManager pm = getPackageManager(); for (ApplicationInfo app : pm.getInstalledApplica…
#Java
Android获取应用程序下所有Activity
public static ArrayList<String> getActivities(Context ctx) { ArrayList<String>…
#Java
Android精确获取屏幕尺寸（例如：3.5、4.0、5.0寸屏幕）
public static double getScreenPhysicalSize(Activity ctx) { DisplayMetrics dm = new Display…
#Java
启动APK的默认Activity
public static void startApkActivity(final Context ctx, String packageName) { PackageManage…
#Java
Android 倒计时工具类
在平时我们编程的时候，经常会用到倒计时这个功能，很多人不知道Android已经帮封装好了一个类，往往都自己写。现在发现了这个类，大家共享一下： 在一个TextView不断显示剩下的…
#Java
Android网络图片缓存
获取一张图片，从三个地方进行获取，首先是内存缓存，然后是文件缓存，最后才从网络中获取。 //内存缓存 public class ImageMemoryCache { /** * 从…
#Java
HttpClients下载与入门
Http协议的重要性相信不用我多说了，HttpClient相比传统JDK自带的URLConnection，增加了易用性和灵活性（具体区别，日后我 们再讨论），它不仅是客户端发送Ht…
#Java
从assets中读取文本和图片资源
/** 从assets 文件夹中读取文本数据 */ public static String getTextFromAssets(final Context context, St…
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