Android Open Source - HistoryCleanerPro Helper

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Back to project page HistoryCleanerPro.

License

The source code is released under:

Copyright (c) 2014, John Phillips All rights reserved. Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: ...

Java Source Code

package com.ayros.historycleaner.helpers;
/* w  w w. j  a v  a 2  s.c  o  m*/
import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.URLDecoder;
import java.net.URLEncoder;
import java.util.ArrayList;
import java.util.List;

import android.content.pm.PackageInfo;
import android.graphics.drawable.Drawable;

import com.ayros.historycleaner.Globals;
import com.ayros.historycleaner.R;

public class Helper
{
  public static final String CHARSET_ALPHA_LOWER = "abcdefghijklmnopqrstuvwxyz";

  static List<String> packageNames = null;
  static List<PackageInfo> packageList = null;

  public static boolean isPackageInstalled(String name)
  {
    if (packageNames == null)
    {
      loadPackages(true);
    }

    return packageNames.contains(name);
  }

  public static Drawable getPackageIcon(String name)
  {
    try
    {
      return Globals.getContext().getPackageManager().getApplicationIcon(name);
    }
    catch (Exception e)
    {
      return Globals.getContext().getResources().getDrawable(R.drawable.default_icon);
    }
  }

  private static void loadPackages(boolean force)
  {
    if (packageList == null || force == true)
    {
      packageNames = new ArrayList<String>();

      packageList = Globals.getContext().getPackageManager().getInstalledPackages(0);
      for (PackageInfo pi : packageList)
      {
        packageNames.add(pi.packageName);
      }
    }
  }

  public static String randomString(int len)
  {
    return randomString(len, CHARSET_ALPHA_LOWER);
  }

  public static String randomString(int len, String charset)
  {
    String out = "";

    for (int i = 0; i < len; i++)
    {
      out += charset.charAt((int)(Math.random() * charset.length()));
    }

    return out;
  }

  public static String urlEncode(String text)
  {
    try
    {
      return URLEncoder.encode(text, "UTF-8");
    }
    catch (Exception e)
    {
      return "";
    }
  }

  public static String urlDecode(String text)
  {
    try
    {
      return URLDecoder.decode(text, "UTF-8");
    }
    catch (Exception e)
    {
      return "";
    }
  }

  public static String convertStreamToString(InputStream is)
  {
    try
    {
      BufferedReader reader = new BufferedReader(new InputStreamReader(is));
      StringBuilder sb = new StringBuilder();
      String line = null;
      while ((line = reader.readLine()) != null)
      {
        sb.append(line).append("\n");
      }
      is.close();

      return sb.toString();
    }
    catch (Exception e)
    {
      Logger.errorST("Could not convert stream to string", e);
      return null;
    }
  }

  public static String getFileContents(String filePath)
  {
    try
    {
      File fl = new File(filePath);
      FileInputStream fin = new FileInputStream(fl);

      return convertStreamToString(fin);
    }
    catch (Exception e)
    {
      Logger.errorST("Could not read file contents: " + filePath, e);
      return null;
    }
  }
}

Java Source Code List

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