JAVA中抓异常的办法

public class UnExceptionHandler implements Thread.UncaughtExceptionHandler
{
private static UnExceptionHandler exceptionHandler;
private static long lastTime;
private static long File logFile;
public static UnCatchHandler getInstance()
{
    if(mUnCatchHandler == null)
    {
        synchronized (UnCatchHandler.class)
        {
            exceptionHandler = new UnExceptionHandler();
            Thread.setDefaultUncaughtExceptionHandler(exceptionHandler);
            lastTime = System.current();
            logFile = new File();
        }
    }
    return exceptionHandler;
}
private UnCatchHandler(Context context)
{
    //
}
/**
 * 保存异常
 * @param t
 * @param e
 */
@Override
public void uncaughtException(Thread t, Throwable e)
{
    //时间控制，文件大小控制
    try
    {
        BufferedWriter writer = new BufferedWriter(new FileWriter(logFile));
        witer.write(time);
        for (ele : e.get())
        {
             writer.write();
        }
        writer.close();
    }
    catch (Exception ex)
    {
        ex.printStackTrace();
    }
}