全局ToastUtil

package com.tomtop.shop.utils;

import android.content.Context;
import android.widget.Toast;

import com.tomtop.shop.app.TTApplication;

/** * @ClassName ToastUtil.java * @Description 自定义toast * @author tc * @datetime 2015年8月20日下午4:04:50 */
public class ToastUtil {
    private static  Toast mToast;
    private static Context mContext = [你的application实现类]
            .getApplicationContext();

    /** * 显示Toast,页面中重复Toast不会重复实例化Toast对象 * * @param charSequence * 字符串 */
    public static void showToast(CharSequence charSequence) {

        if (mToast == null) {
            mToast = Toast.makeText(mContext, charSequence, Toast.LENGTH_SHORT);
        } else {
            mToast.setText(charSequence);
            mToast.setDuration(Toast.LENGTH_SHORT);
        }

        mToast.show();
    }

    /** * 显示Toast,页面中重复Toast不会重复实例化Toast对象 * * @param charSequence * 字符串 * @param duration * 显示时间 */
    public static void showToast(CharSequence charSequence, int duration) {

        if (mToast == null) {
            mToast = Toast.makeText(mContext, charSequence, duration);
        } else {
            mToast.setText(charSequence);
            mToast.setDuration(duration);
        }

        mToast.show();
    }

    /** * 显示Toast,页面中重复Toast不会重复实例化Toast对象 * * @param resId * String资源ID * @param duration * 显示时间 */
    public static void showToast(int resId, int duration) {

        if (mToast == null) {
            mToast = Toast.makeText(mContext, resId, duration);
        } else {
            mToast.setText(resId);
            mToast.setDuration(duration);
        }

        mToast.show();
    }

    /** * 显示Toast,页面中重复Toast不会重复实例化Toast对象 * * @param resId * String资源ID */
    public static void showToast(int resId) {

        if (mToast == null) {
            mToast = Toast.makeText(mContext, resId, Toast.LENGTH_SHORT);
        } else {
            mToast.setText(resId);
            mToast.setDuration(Toast.LENGTH_SHORT);
        }

        mToast.show();
    }

    /** * 取消Toast显示 */
    public static void cancelToast() {
        if (mToast != null) {
            mToast.cancel();
        }
    }

}