Android 日志工具类log

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import android.os.Environment;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.text.SimpleDateFormat;
import java.util.Date;

/**
* 日志工具类
*
* @author amose
*/
public class Log {

private static final boolean DEBUG = Constant.DEBUG;private static final File DIR = new File(        Environment.getExternalStorageDirectory() + "/organization/log/");private static final String FILE_NAME = "log.txt";private static final SimpleDateFormat FORMAT = new SimpleDateFormat(        "yyyy-MM-dd HH:mm:ss");private static synchronized void save2file(String level, String tag,                                           String msg) {    if (Environment.MEDIA_MOUNTED.equals(Environment            .getExternalStorageState())) {        if (!DIR.exists()) {            if (!DIR.mkdirs()) {                return;            }        }        FileOutputStream outputStream = null;        File file = new File(DIR, FILE_NAME);        if (file.exists() && file.length() > 1024 * 100) {            file.delete();        }        try {            outputStream = new FileOutputStream(file, true);            outputStream.write(("[" + FORMAT.format(new Date()) + "] ["                    + level + "] [" + tag + "] " + msg + "\n").getBytes());        } catch (FileNotFoundException e) {        } catch (IOException e) {        } finally {            if (outputStream != null) {                try {                    outputStream.close();                } catch (IOException e) {                }            }        }    }}public static void v(String tag, String msg) {    if (DEBUG) {        android.util.Log.v(tag, msg);    }}public static void d(String tag, String msg) {    if (DEBUG) {        android.util.Log.d(tag, msg);    }}public static void i(String tag, String msg) {    if (DEBUG) {        android.util.Log.i(tag, msg);    }}public static void w(String tag, String msg) {    if (DEBUG) {        android.util.Log.w(tag, msg);    }}public static void e(String tag, String msg) {    if (DEBUG) {        android.util.Log.e(tag, msg);        save2file("error", tag, msg);    }}

}

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