[视图]Toast优化,同一时间内部重复Toast N次

防止Toast N次,Toast一直不消失.
完整代码:
import android.widget.Toast;

public class Tools {
private static Toast mToast;

private static Handler mHandler = new Handler();private static Runnable r = new Runnable() {    public void run() {        mToast.cancel();    }};

//调用showToast提示

public static void showToast(Context mContext, String text) {    try {

//每次调用先把前一个提示给remove掉        mHandler.removeCallbacks(r);        if (mToast != null) {            mToast.setText(text);        } else {            mToast = Toast.makeText(mContext, text, Toast.LENGTH_SHORT);        }        mHandler.postDelayed(r, 2000);        mToast.show();    } catch (Resources.NotFoundException e) {        e.printStackTrace();    }}

public static void showToast(Context mContext, int resId) {    showToast(mContext, mContext.getResources().getString(resId));}

}