Android toast工具類

package com.androidstatus.udp.util;

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

/**
 * Toast Manager , be watching out for using in Main Thread
 * 
 */
public class T {
	// Toast
	private static Toast toast;

	/**
	 * 
	 * @param context
	 * @param message
	 */
	public static void showShort(Context context, CharSequence message) {
		if (null == toast) {
			toast = Toast.makeText(context, message, Toast.LENGTH_SHORT);
			 toast.setGravity(Gravity.CENTER, 0, 0);
		} else {
			toast.setText(message);
		}
		toast.show();
	}

	/**
	 * 
	 * @param context
	 * @param message
	 */
	public static void showShort(Context context, int message) {
		if (null == toast) {
			toast = Toast.makeText(context, message, Toast.LENGTH_SHORT);
			 toast.setGravity(Gravity.CENTER, 0, 0);
		} else {
			toast.setText(message);
		}
		toast.show();
	}

	/**
	 * 
	 * @param context
	 * @param message
	 */
	public static void showLong(Context context, CharSequence message) {
		if (null == toast) {
			toast = Toast.makeText(context, message, Toast.LENGTH_LONG);
			 toast.setGravity(Gravity.CENTER, 0, 0);
		} else {
			toast.setText(message);
		}
		toast.show();
	}

	/**
	 * 
	 * @param context
	 * @param message
	 */
	public static void showLong(Context context, int message) {
		if (null == toast) {
			toast = Toast.makeText(context, message, Toast.LENGTH_LONG);
			 toast.setGravity(Gravity.CENTER, 0, 0);
		} else {
			toast.setText(message);
		}
		toast.show();
	}

	/**
	 * 
	 * @param context
	 * @param message
	 * @param duration
	 */
	public static void show(Context context, CharSequence message, int duration) {
		if (null == toast) {
			toast = Toast.makeText(context, message, duration);
			 toast.setGravity(Gravity.CENTER, 0, 0);
		} else {
			toast.setText(message);
		}
		toast.show();
	}

	/**
	 * 
	 * @param context
	 * @param message
	 * @param duration
	 */
	public static void show(Context context, int message, int duration) {
		if (null == toast) {
			toast = Toast.makeText(context, message, duration);
			 toast.setGravity(Gravity.CENTER, 0, 0);
		} else {
			toast.setText(message);
		}
		toast.show();
	}

	/** Hide the toast, if any. */
	public static void hideToast() {
		if (null != toast) {
			toast.cancel();
		}
	}
}

這個類只能用在主線程之中，不能用在thread線程