第一次提交

2016-02-19 22:42:25 +08:00
commit 20d6a79e20
12 changed files with 926 additions and 0 deletions
--- a/src/main/java/com/arialyy/downloadutil/Util.java
+++ b/src/main/java/com/arialyy/downloadutil/Util.java
@@ -0,0 +1,175 @@
+package com.arialyy.downloadutil;
+
+import android.util.Log;
+
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.FileNotFoundException;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.math.BigDecimal;
+import java.util.Properties;
+
+/**
+ * Created by lyy on 2016/1/22.
+ */
+public class Util {
+    private static final String TAG = "util";
+
+    /**
+     * 格式化文件大小
+     *
+     * @param size file.length() 获取文件大小
+     * @return
+     */
+    public static String formatFileSize(double size) {
+        double kiloByte = size / 1024;
+        if (kiloByte < 1) {
+            return size + "Byte(s)";
+        }
+
+        double megaByte = kiloByte / 1024;
+        if (megaByte < 1) {
+            BigDecimal result1 = new BigDecimal(Double.toString(kiloByte));
+            return result1.setScale(2, BigDecimal.ROUND_HALF_UP).toPlainString() + "KB";
+        }
+
+        double gigaByte = megaByte / 1024;
+        if (gigaByte < 1) {
+            BigDecimal result2 = new BigDecimal(Double.toString(megaByte));
+            return result2.setScale(2, BigDecimal.ROUND_HALF_UP).toPlainString() + "MB";
+        }
+
+        double teraBytes = gigaByte / 1024;
+        if (teraBytes < 1) {
+            BigDecimal result3 = new BigDecimal(Double.toString(gigaByte));
+            return result3.setScale(2, BigDecimal.ROUND_HALF_UP).toPlainString() + "GB";
+        }
+        BigDecimal result4 = new BigDecimal(teraBytes);
+        return result4.setScale(2, BigDecimal.ROUND_HALF_UP).toPlainString() + "TB";
+    }
+    /**
+     * 创建目录 当目录不存在的时候创建文件，否则返回false
+     *
+     * @param path
+     * @return
+     */
+    public static boolean createDir(String path) {
+        File file = new File(path);
+        if (!file.exists()) {
+            if (!file.mkdirs()) {
+                Log.d(TAG, "创建失败，请检查路径和是否配置文件权限！");
+                return false;
+            }
+            return true;
+        }
+        return false;
+    }
+
+    /**
+     * 创建文件 当文件不存在的时候就创建一个文件，否则直接返回文件
+     *
+     * @param path
+     * @return
+     */
+    public static File createFile(String path) {
+        File file = new File(path);
+        if (!file.getParentFile().exists()) {
+            Log.d(TAG, "目标文件所在路径不存在，准备创建……");
+            if (!createDir(file.getParent())) {
+                Log.d(TAG, "创建目录文件所在的目录失败！文件路径【" + path + "】");
+            }
+        }
+        // 创建目标文件
+        try {
+            if (!file.exists()) {
+                if (file.createNewFile()) {
+                    Log.d(TAG, "创建文件成功:" + file.getAbsolutePath());
+                }
+                return file;
+            } else {
+                return file;
+            }
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+        return null;
+    }
+    /**
+     * 设置打印的异常格式
+     */
+    public static String getPrintException(Throwable ex) {
+        StringBuilder err = new StringBuilder();
+        err.append("ExceptionDetailed:\n");
+        err.append("====================Exception Info====================\n");
+        err.append(ex.toString());
+        err.append("\n");
+        StackTraceElement[] stack = ex.getStackTrace();
+        for (StackTraceElement stackTraceElement : stack) {
+            err.append(stackTraceElement.toString()).append("\n");
+        }
+        Throwable cause = ex.getCause();
+        if (cause != null) {
+            err.append("【Caused by】: ");
+            err.append(cause.toString());
+            err.append("\n");
+            StackTraceElement[] stackTrace = cause.getStackTrace();
+            for (StackTraceElement stackTraceElement : stackTrace) {
+                err.append(stackTraceElement.toString()).append("\n");
+            }
+        }
+        err.append("===================================================");
+        return err.toString();
+    }
+    /**
+     * 读取下载配置文件
+     *
+     * @param file
+     * @return
+     */
+    public static Properties loadConfig(File file) {
+        Properties properties = new Properties();
+        FileInputStream fis = null;
+        try {
+            fis = new FileInputStream(file);
+            properties.load(fis);
+        } catch (Exception e) {
+            e.printStackTrace();
+        } finally {
+            try {
+                if (fis != null) {
+                    fis.close();
+                }
+            } catch (IOException e) {
+                e.printStackTrace();
+            }
+        }
+        return properties;
+    }
+
+    /**
+     * 保存配置文件
+     *
+     * @param file
+     * @param properties
+     */
+    public static void saveConfig(File file, Properties properties) {
+        FileOutputStream fos = null;
+        try {
+            fos = new FileOutputStream(file, false);
+            properties.store(fos, null);
+        } catch (Exception e) {
+            e.printStackTrace();
+        } finally {
+            try {
+                if (fos != null) {
+                    fos.flush();
+                    fos.close();
+                }
+            } catch (IOException e) {
+                e.printStackTrace();
+            }
+        }
+    }
+}