问题描述
我有一个onClick事件在我的Android应用程序触发以下code,但它让我崩溃的应用程序。我把它放在一个线程不仅是因为我读的是应该以prevent崩溃。此外CTX指活动的情况下(这是我在活动设置等于此创建一个变量。我已阅读并尝试了几件事情。任何帮助将是真棒,谢谢!
发toastThread =新的Thread(){
公共无效的run(){
吐司alertFailure = Toast.makeText(CTX,登录失败,Toast.LENGTH_LONG);
alertFailure.show();
}
};
toastThread.start();
您需要使用runOnUiThread
类似于
runOnUiThread(新的Runnable(){
公共无效的run()
{
Toast.makeText(CTX,烤面包,Toast.LENGTH_SHORT).show();
}
});
}
吐司
是 UI
元素,所以它需要在 UI线程中运行
,而不是一个背景发
。
但是,如果这是你正在使用它,那么你并不需要一个单独的发
只显示一个吐司
。如果你能解释一下你是如何使用它,然后背景下,也许我们可以帮助您更好的办法。另外,如果你是你的活动的内部
那么你就需要为上下文
的变量。您可以使用 ActivityName.this
而不是访问活动上下文
I have an onClick event in my android app that triggers the following code but it keeps crashing my app. I put it in a thread only because i read that that's supposed to prevent crashing. Also ctx refers to the Activity's context (it's a variable I created in the activity set equal to this. I've read and tried several things. Any help would be awesome. Thanks!
Thread toastThread = new Thread() {
public void run() {
Toast alertFailure = Toast.makeText(ctx, "Login Failed", Toast.LENGTH_LONG);
alertFailure.show();
}
};
toastThread.start();
You need to use runOnUiThread
Something like
runOnUiThread(new Runnable() {
public void run()
{
Toast.makeText(ctx, toast, Toast.LENGTH_SHORT).show();
}
});
}
Toast
is a UI
element so it needs to run on the UI Thread
, not a background Thread
.
However, if this is all you are using it for then you don't need a separate Thread
just to show a Toast
. If you can explain the context of how you are using it then maybe we can help with a better way. Also, if you are inside of your Activity
then you don't need a variable for Context
. You can use ActivityName.this
instead to access the Activity Context
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