Android Open Source - ILog File Logger

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License

The source code is released under:

GNU General Public License

Java Source Code

package com.moshx.ilog.filelogger;
//from www .  j  a  v  a 2s .c  om
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.PrintStream;

import com.moshx.ilog.Settings.Level;
import com.moshx.ilog.utils.Utility;

public abstract class FileLogger {

  protected PrintStream printStream;

  public void setLogStream(PrintStream printStream) {
    this.printStream = printStream;
    onStart();
  }

  public FileLogger setLogFile(String path) {
    setLogFile(new File(path));
    return this;
  }

  public File createLogFile(String path) {

    try {
      File f = new File(path);
      f.getParentFile().mkdirs();
      f.createNewFile();
      setLogFile(f);
      return f;
    } catch (Exception e) {
      e.printStackTrace();
      setLogStream(null);
    }
    return null;
  }

  public File createLogFile(String parent, String fileName) {
    try {
      File f = new File(parent, fileName);
      f.getParentFile().mkdirs();
      f.createNewFile();
      setLogFile(f);
      return f;

    } catch (Exception e) {
      e.printStackTrace();
      setLogStream(null);
    }
    return null;
  }

  public File createLogFile(File parentFile, String fileName) {
    return createLogFile(parentFile.getAbsolutePath(), fileName);
  }

  public File createLogFile(File parentFile) {
    try {
      File f = new File(parentFile, generateLogFileName()
          + getFileExtension());
      f.getParentFile().mkdirs();
      f.createNewFile();
      setLogFile(f);
      return f;
    } catch (Exception e) {
      e.printStackTrace();
      setLogStream(null);
    }

    return null;
  }

  public File setLogFile(File file) {
    if (file != null && file.exists() && file.canWrite()) {
      try {
        PrintStream stream = new PrintStream(
            new FileOutputStream(file), true);
        setLogStream(stream);
        return file;

      } catch (FileNotFoundException e) {
        e.printStackTrace();
        setLogStream(null);
      }

    } else {
      setLogStream(null);
    }

    return null;
  }

  public void onStart() {
    if (printStream == null) {
      return;
    }
    printStream.append("Logging Started on "
        + Utility.getFormattedDate().concat("\n\n"));
  }

  public abstract boolean log(Level level, String tag, Object msg,
      Throwable err);

  public void onEnd() {
    if (printStream == null) {
      return;
    }
    printStream.append("\nLogging Ended on "
        + Utility.getFormattedDate().concat("\n"));
  }

  public static String generateLogFileName() {
    return "ILog_" + Utility.getFormattedFileDate();
  }

  protected String getFileExtension() {
    return ".log";
  }

}

Java Source Code List

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