FileLog.java

package support.ui.utilities;

import android.util.Log;

import java.io.File;
import java.io.FileOutputStream;
import java.io.OutputStreamWriter;
import java.util.Locale;

import support.ui.app.SupportApp;
import support.ui.utilities.time.FastDateFormat;

/**
 * Created by YuGang Yang on 04 07, 2016.
 * Copyright 2015-2016 qiji.tech. All rights reserved.
 */
public class FileLog {
  private OutputStreamWriter streamWriter = null;
  private FastDateFormat dateFormat = null;
  private DispatchQueue logQueue = null;
  private File currentFile = null;
  private File networkFile = null;

  private static volatile FileLog Instance = null;
  public static FileLog getInstance() {
    FileLog localInstance = Instance;
    if (localInstance == null) {
      synchronized (FileLog.class) {
        localInstance = Instance;
        if (localInstance == null) {
          Instance = localInstance = new FileLog();
        }
      }
    }
    return localInstance;
  }

  public FileLog() {
    if (!BuildVars.DEBUG_VERSION) {
      return;
    }
    dateFormat = FastDateFormat.getInstance("dd_MM_yyyy_HH_mm_ss", Locale.US);
    try {
      File sdCard = SupportApp.appContext().getExternalFilesDir(null);
      if (sdCard == null) {
        return;
      }
      File dir = new File(sdCard.getAbsolutePath() + "/logs");
      dir.mkdirs();
      currentFile = new File(dir, dateFormat.format(System.currentTimeMillis()) + ".txt");
    } catch (Exception e) {
      e.printStackTrace();
    }
    try {
      logQueue = new DispatchQueue("logQueue");
      currentFile.createNewFile();
      FileOutputStream stream = new FileOutputStream(currentFile);
      streamWriter = new OutputStreamWriter(stream);
      streamWriter.write("-----start log " + dateFormat.format(System.currentTimeMillis()) + "-----\n");
      streamWriter.flush();
    } catch (Exception e) {
      e.printStackTrace();
    }
  }

  public static String getNetworkLogPath() {
    if (!BuildVars.DEBUG_VERSION) {
      return "";
    }
    try {
      File sdCard = SupportApp.appContext().getExternalFilesDir(null);
      if (sdCard == null) {
        return "";
      }
      File dir = new File(sdCard.getAbsolutePath() + "/logs");
      dir.mkdirs();
      getInstance().networkFile = new File(dir, getInstance().dateFormat.format(System.currentTimeMillis()) + "_net.txt");
      return getInstance().networkFile.getAbsolutePath();
    } catch (Throwable e) {
      e.printStackTrace();
    }
    return "";
  }

  public static void e(final String tag, final String message, final Throwable exception) {
    if (!BuildVars.DEBUG_VERSION) {
      return;
    }
    Log.e(tag, message, exception);
    if (getInstance().streamWriter != null) {
      getInstance().logQueue.postRunnable(new Runnable() {
        @Override
        public void run() {
          try {
            getInstance().streamWriter.write(getInstance().dateFormat.format(System.currentTimeMillis()) + " E/" + tag + "﹕ " + message + "\n");
            getInstance().streamWriter.write(exception.toString());
            getInstance().streamWriter.flush();
          } catch (Exception e) {
            e.printStackTrace();
          }
        }
      });
    }
  }

  public static void e(final String tag, final String message) {
    if (!BuildVars.DEBUG_VERSION) {
      return;
    }
    Log.e(tag, message);
    if (getInstance().streamWriter != null) {
      getInstance().logQueue.postRunnable(new Runnable() {
        @Override
        public void run() {
          try {
            getInstance().streamWriter.write(getInstance().dateFormat.format(System.currentTimeMillis()) + " E/" + tag + "﹕ " + message + "\n");
            getInstance().streamWriter.flush();
          } catch (Exception e) {
            e.printStackTrace();
          }
        }
      });
    }
  }

  public static void e(final String tag, final Throwable e) {
    if (!BuildVars.DEBUG_VERSION) {
      return;
    }
    e.printStackTrace();
    if (getInstance().streamWriter != null) {
      getInstance().logQueue.postRunnable(new Runnable() {
        @Override
        public void run() {
          try {
            getInstance().streamWriter.write(getInstance().dateFormat.format(System.currentTimeMillis()) + " E/" + tag + "﹕ " + e + "\n");
            StackTraceElement[] stack = e.getStackTrace();
            for (StackTraceElement el : stack) {
              getInstance().streamWriter.write(getInstance().dateFormat.format(System.currentTimeMillis()) + " E/" + tag + "﹕ " + el + "\n");
            }
            getInstance().streamWriter.flush();
          } catch (Exception e) {
            e.printStackTrace();
          }
        }
      });
    } else {
      e.printStackTrace();
    }
  }

  public static void d(final String tag, final String message) {
    if (!BuildVars.DEBUG_VERSION) {
      return;
    }
    Log.d(tag, message);
    if (getInstance().streamWriter != null) {
      getInstance().logQueue.postRunnable(new Runnable() {
        @Override
        public void run() {
          try {
            getInstance().streamWriter.write(getInstance().dateFormat.format(System.currentTimeMillis()) + " D/" + tag + "﹕ " + message + "\n");
            getInstance().streamWriter.flush();
          } catch (Exception e) {
            e.printStackTrace();
          }
        }
      });
    }
  }

  public static void w(final String tag, final String message) {
    if (!BuildVars.DEBUG_VERSION) {
      return;
    }
    Log.w(tag, message);
    if (getInstance().streamWriter != null) {
      getInstance().logQueue.postRunnable(new Runnable() {
        @Override
        public void run() {
          try {
            getInstance().streamWriter.write(getInstance().dateFormat.format(System.currentTimeMillis()) + " W/" + tag + ": " + message + "\n");
            getInstance().streamWriter.flush();
          } catch (Exception e) {
            e.printStackTrace();
          }
        }
      });
    }
  }

  public static void cleanupLogs() {
    File sdCard = SupportApp.appContext().getExternalFilesDir(null);
    File dir = new File(sdCard.getAbsolutePath() + "/logs");
    File[] files = dir.listFiles();
    if (files != null) {
      for (int a = 0; a < files.length; a++) {
        File file = files[a];
        if (getInstance().currentFile != null && file.getAbsolutePath().equals(getInstance().currentFile.getAbsolutePath())) {
          continue;
        }
        if (getInstance().networkFile != null && file.getAbsolutePath().equals(getInstance().networkFile.getAbsolutePath())) {
          continue;
        }
        file.delete();
      }
    }
  }
}