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# 单例设计模式
java中的单例设计模式主要有两种:
懒汉式和恶汉式(都是私有构造方法,只对外提供对象,不创建新的对象)
恶汉式:无论怎么样我先吃到再说,这种方式利用空间换区时间,通常在一开始的时候就加载
```
private static final A instance =new A();
private A(){}
public static A getInstance()…
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### Description
I have bound the IsVisible property of an element (say, a BoxView) to a property in the ViewModel. By default the value is false. If I am to change its value to true then back to fals…
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**Describe the bug**
The why use MVVM architecture is missing in the documentation.
**To Reproduce**
Steps to reproduce the behavior:
1. Go to https://github.com/anitab-org/mentorship-android/…
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### Description
LinkerPleaseInclude has proven necessary in order to link apps without runtime issues. However, the current suggested way of doing is by including the `LinkerPleaseInclude` class whic…
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**Describe the bug**
A clear and concise description of what the bug is.
**Affected platforms**
- iOS
**Versions**
- Kotlin version*: 1.9.22
- Compose Multiplatform version*: 1.6.0…
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When Page size is set to 20, visible_threshold is 5 and search with keyword "Wasabee" the total items received is 21, but on scroll, there are duplicate items summing up to 41.
The list shows dupli…
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#### Issue Summary
I just integrated the file into android gradle and after syncing it just went to errors of data binding files. I have implemented MVVM in my android project.
ghost updated
5 years ago
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Why LoginViewModelActionKs is not generated ? I am getting
Cannot find 'LoginViewModelActionKs' in scope
My gradle files:
**project gradle**
```
buildscript {
val compose_version by e…
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https://miqingwang.github.io/2021/01/11/%E3%80%90Android-%E5%BC%80%E5%8F%91%E6%A1%86%E6%9E%B6%E6%90%AD%E5%BB%BA%E3%80%91-%E5%AD%A6%E4%BC%9A%E4%BD%BF%E7%94%A8MVVM%E6%9E%B6%E6%9E%84%E7%9A%84%E6%90%AD%E5…
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MVVM pattern.
Test driven development.
PagerView two ListFragment.
Espresso android testing.