public class ToastUtils {    private static String TAG="ToastUtils";    private static Toast toast;    /**     *单例获取实例     * @param context     * @return     */    private static ToastUtils toastUtils;    private  ToastUtils(Context context){        toast=Toast.makeText(context.getApplicationContext(),null,Toast.LENGTH_SHORT);    }    public static ToastUtils instance(Context context){        if(toastUtils==null){            synchronized (ToastUtils.class){                if(toastUtils==null){                    toastUtils=new ToastUtils(context);                }            }        }        return toastUtils;    }    //短时间显示Toast    public void showShortToast(String msg){        toast.setText(msg);        toast.setDuration(Toast.LENGTH_SHORT);        toast.show();    }    //短时间显示Toast    public void showShortToast(int resId){        toast.setText(resId);        toast.setDuration(Toast.LENGTH_SHORT);        toast.show();    }    //长时间显示Toast    public void ShowLongToast(String msg){        toast.setText(msg);        toast.setDuration(Toast.LENGTH_LONG);        toast.show();    }    //长时间显示Toast     public void ShowLongToast(int resId){        toast.setText(resId);        toast.setDuration(Toast.LENGTH_LONG);        toast.show();    }    //取消toast    public void cancleToast(){        if(toast!=null){            toast.cancel();            toast=null;        }        toastUtils=null;    }}