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Activity has leaked window that was originally added
...an Activity.
[EDIT]
This question is one of the top search on google for android developer,
therefore Adding few important points from comments, which might be more helpful for future investigator without going in depth of comment conversation.
Answer 1 :
You're trying to show a Dialog after...
Android: upgrading DB version and adding new table
...n sql file for each update as described in the link https://riggaroo.co.za/android-sqlite-database-use-onupgrade-correctly/
from_1_to_2.sql
ALTER TABLE books ADD COLUMN book_rating INTEGER;
from_2_to_3.sql
ALTER TABLE books RENAME TO book_information;
from_3_to_4.sql
ALTER TABLE book_informa...
写出高质量代码的10个Tips - 更多技术 - 清泛网 - 专注C/C++及内核技术
...代码质量密切相关的几点：
掌握好开发语言，比如做Android就必须对Java足够熟悉，《Effective Java》一书就是教授大家如何更好得掌握Java, 写出高质量Java代码。
熟悉开发平台, 不同的开发平台，有不同的API, 有不同的工作原理，...
Should accessing SharedPreferences be done off the UI Thread?
...ched), but yaffs doesn't have much in the way of concurrency (and a lot of Android devices run on yaffs... Droid, Nexus One, etc.) so if you avoid disk, you avoid getting stuck behind other in-flight or pending disk operations.
so you'll probably want to load the SharedPreferences during your onCrea...
Select all text inside EditText when it gets focus
...
You can try in your main.xml file:
android:selectAllOnFocus="true"
Or, in Java, use
editText.setSelectAllOnFocus(true);
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Java: getMinutes and getHours
...to be backwards-compatible. Regrettably not suitable if you're writing for Android and supporting older API versions (or in any other instance when Java 8 isn't always available).
– M_M
Jul 23 '19 at 16:54
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Overriding Binding in Guice
...ned in separate modules. The activity that's being injected into is in an Android Library Module, with its own RoboGuice module definition in the AndroidManifest.xml file.
The setup looks like this. In the Library Module there are these definitions:
AndroidManifest.xml:
<application androi...
How to hide a View programmatically?
...
Or view.setVisibility(View.INVISIBLE) if you just want to hide it.
From Android Docs:
INVISIBLE
This view is invisible, but it still takes up space for layout purposes. Use with setVisibility(int) and android:visibility.
GONE
This view is invisible, and it doesn't take any spac...
How to put space character into a string name in XML?
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Android doesn't support keeping the spaces at the end of the string in String.xml file so if you want space after string you need to use this unicode in between the words.
\u0020
It is a unicode space character.
...
Is AsyncTask really conceptually flawed or am I just missing something?
...though there were static strong references to them. Maybe a side-effect of Android's class loader, or a bug even, but static references are no safe way of exchanging state across an activity life-cycle. The app object is, however, that's why I use that.
– Matthias
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