[英]Android: best way to make a View disappear after a defined amount of time
I would like to make a textView disappear after a define amount of time succeeding a change of the text. 我想让textView在一段确定的时间之后成功更改文本,然后消失。
I am not sure what the best way to proceed is. 我不确定最好的处理方法是什么。
The problem of using Thread.sleep(2000);
使用Thread.sleep(2000);
, is that it would obviously make the whole UI thread sleep. ,这显然会使整个UI线程休眠。 Using Thread.sleep(2000);
使用Thread.sleep(2000);
inside an AsyncTask
seems wrong. 内部AsyncTask
似乎是错误的。 In addition, it would lead to problems if the user leave the Activity that needs to be updated by the AsyncTask
. 另外,如果用户离开需要由AsyncTask
更新的Activity,则将导致问题。
There must be a cleaner way to implement that. 必须有一种更清洁的方法来实现这一目标。 If you know any: feel free to answer :-) 如果您知道的话:请随时回答:-)
You don't need to create a handler: 您不需要创建处理程序:
view.postDelayed(new Runnable(){
@Override
public void run()
{
view.setVisibility(View.GONE);
}
}, 10000);
You can use a Runnable
for this: 您可以为此使用Runnable
:
Handler myHandler = new Handler();
Runnable myRunnable = new Runnable() {
@Override
public void run() {
//Hide your view
}
};
Then after your change of text, add the following: 然后,在更改文本后,添加以下内容:
myHandler.postDelayed(myRunnable, TIME_IN_MILLISECONDS);
Hope it helps. 希望能帮助到你。
Can you do something like this? 你可以做这样的事情吗?
In your activity, create a handler: 在您的活动中,创建一个处理程序:
Handler handler = new Handler()
{
@Override
public void handleMessage (Message msg)
{
if (msg.what == HIDE_VIEW)
hideView(); // defined elsewhere in your activitry
}
}
And at the point where you want to start the timer, do this: 然后在要启动计时器的位置执行以下操作:
postDelayed (new Runnable()
{
@Override
public void run()
{
Message msg = handler.obtainMessage();
msg.what = HIDE_VIEW;
msg.obj = null;
handler.sendMessage (msg);
}
}, 10000);
Not sure if you need this level of asynchronousity. 不知道您是否需要此级别的异步性。
Sorry for the wrong interpretation of the question, 抱歉,您对问题的解释不正确,
Use textView .setVisibility(View.INVISIBLE)
使用textView .setVisibility(View.INVISIBLE)
within a handler 在处理程序内
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