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Android中用Toast.cancel()方法优化toast内容的显示

 

产品在测试过程中发现一个bug,就是测试人员不停的疯狂的点击某个按钮,触发了toast以后,toast内容会一直排着队的显示出来,不能很快的消失。这样可能会影响用户的使用。

看到Toast有一个cancel()方法:

voidcancel()

Close the view if it's showing, or don't show it if it isn't showing yet.

做程序员的,基本一看api就知道,用这个可以取消上一个toast的显示,然后显示下一个,这样就能解决出现的问题。可是在测试的过程中,发现却没有想象中的那么简单,不信可以百度一下,很多很多人发现toast的cancel()方法不起作用。还是不讲具体过程,只讲结果吧。

我把toast做成了一个应用类,方便使用,大家可以直接用:

 

package com.arui.framework.android.util; 

 

import android.content.Context; 

import android.os.Handler; 

import android.os.Looper; 

import android.widget.Toast; 

 

public class ToastUtil { 

 

    private static Handler handler = new Handler(Looper.getMainLooper()); 

 

    private static Toast toast = null; 

     

    private static Object synObj = new Object(); 

 

    public static void showMessage(final Context act, final String msg) { 

        showMessage(act, msg, Toast.LENGTH_SHORT); 

    } 

 

    public static void showMessage(final Context act, final int msg) { 

        showMessage(act, msg, Toast.LENGTH_SHORT); 

    } 

 

    public static void showMessage(final Context act, final String msg, 

            final int len) { 

        new Thread(new Runnable() { 

            public void run() { 

                handler.post(new Runnable() { 

                    @Override 

                    public void run() { 

                        synchronized (synObj) { 

                            if (toast != null) { 

                                toast.cancel(); 

                                toast.setText(msg); 

                                toast.setDuration(len); 

                            } else { 

                                toast = Toast.makeText(act, msg, len); 

                            } 

                            toast.show(); 

                        } 

                    } 

                }); 

            } 

        }).start(); 

    } 

 

 

    public static void showMessage(final Context act, final int msg, 

            final int len) { 

        new Thread(new Runnable() { 

            public void run() { 

                handler.post(new Runnable() { 

                    @Override 

                    public void run() { 

                        synchronized (synObj) { 

                            if (toast != null) { 

                                toast.cancel(); 

                                toast.setText(msg); 

                                toast.setDuration(len); 

                            } else { 

                                toast = Toast.makeText(act, msg, len); 

                            } 

                            toast.show(); 

                        } 

             

补充:移动开发 , Android ,
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