Android Open Source - SimpleReader App Context

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License

The source code is released under:

Apache License

Java Source Code

package com.dreamteam.app.commons;
//  w  w  w  . java  2 s.  c  o  m
import java.io.File;

import android.content.Context;
import android.content.SharedPreferences;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.preference.PreferenceManager;
import android.webkit.CacheManager;

import com.dreamteam.app.utils.FileUtils;
import com.dreamteam.app.utils.MD5;

/**
 * @description TODO
 * @author zcloud
 * @date Dec 8, 2013
 */
@SuppressWarnings("deprecation")
public class AppContext
{
  
  public static boolean isNetworkAvailable(Context context)
  {
    ConnectivityManager connMgr = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE); 
    NetworkInfo networkInfo = connMgr.getActiveNetworkInfo();
    if(networkInfo == null || networkInfo.isConnected() == false)
    {
      return false;
    }
    return true;
  }

  public static SharedPreferences getPrefrences(Context context)
  {
    return PreferenceManager.getDefaultSharedPreferences(context);
  }
  
  //????
  public static void clearCache(Context context)
  {
    clearSdCache();
    clearWebViewCache(context);
  }
  
  public static void clearSdCache()
  {
    FileUtils.deleteDirectory(AppConfig.APP_SECTION_DIR);
    FileUtils.deleteDirectory(AppConfig.APP_IMAGE_CACHE_DIR);
  }
  
  //??webview??
  public static void clearWebViewCache(Context context)
  {
    File file = CacheManager.getCacheFileBaseDir();  
    if (file != null && file.exists() && file.isDirectory()) {  
        for (File item : file.listFiles()) {  
          item.delete();  
        }  
        file.delete();  
    }
    context.deleteDatabase("webview.db");  
    context.deleteDatabase("webview.db-shm");  
    context.deleteDatabase("webview.db-wal");  
    context.deleteDatabase("webviewCache.db");  
    context.deleteDatabase("webviewCache.db-shm");  
    context.deleteDatabase("webviewCache.db-wal");  
  }  
  
  public static File getSdImgCache(String url)
  {
    return new File(AppConfig.APP_IMAGE_CACHE_DIR
        + File.separator + MD5.Md5(url));
  }
  
  public static File getSectionCache(String url)
  {
    return new File(AppConfig.APP_SECTION_DIR 
        + File.separator + MD5.Md5(url));
  }
}

Java Source Code List

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