#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
java获取服务器一些信息方法集合(访问路径之类的)
request.getServletContext().getRealPath("/") 获取项目所在服务器的全路径，如：D:\Program Fi…
#Java
java按文件大小、名称、日期排序方法
//java按文件大小、名称、日期排序 //java按文件大小、名称、日期排序方法 import java.io.*; import java.util.*; public cla…
#Java
java使用代理发送http请求
//一种方法是设置全局的代理,在程序中如下设置： System.setProperty("proxySet", "true"); Syste…
#Java
Java 实现生成图片缩略图,缩小高清图片
import com.sun.image.codec.jpeg.JPEGImageEncoder; import com.sun.image.codec.jpeg.JPEGCode…
#Java
Java产生100个1-150间不重复数字
import java.util.Arrays; /** * 用Java产生100个1-150的数字 */ public class RandomTest { public sta…
#Java
Android获取指定文件大小
/** * 获取指定文件大小 * @param f * @return * @throws Exception */ public static long getFileSi…
#Java
Android为图片添加水印文字
import android.os.Bundle; import android.widget.ImageView; import android.app.Activity; im…
#Java
Android图片压缩
1、质量压缩方法 通过compress的方法只是减小了文件的大小，但是并不能保证减低bitmap文件解码后在内存的占用量。 private Bitmap com…
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