appcompat_v7
![preview](https://csdnimg.cn/release/downloadcmsfe/public/img/white-bg.ca8570fa.png)
![preview-icon](https://csdnimg.cn/release/downloadcmsfe/public/img/scale.ab9e0183.png)
![star](https://csdnimg.cn/release/downloadcmsfe/public/img/star.98a08eaa.png)
"appcompat_v7"是Android开发中的一个关键库,它主要的作用是为应用程序提供向后兼容的功能,使得开发者可以方便地在旧版本的Android系统上使用新版本的UI控件和特性。这个库是由Android Support Library(现已被AndroidX库取代)的一部分,它的核心目的是为了扩展API级别较低的设备,使其能支持自Android 4.1 (API级别16)引入的Action Bar样式和功能。 AppCompat库的主要特点和知识点包括: 1. **Action Bar**: 在早期的Android版本中,Action Bar作为应用程序的导航和操作中心,并不被所有版本支持。AppCompat库通过引入`android.support.v7.app.ActionBar`类,使得开发者可以在API级别14以下的设备上实现Action Bar功能,包括设置应用图标、显示/隐藏菜单项、设置导航模式等。 2. **Material Design支持**: 虽然Material Design是自Android 5.0 (API级别21)引入的,但通过AppCompat库,开发者可以在更低版本的Android上实现Material Design风格的界面,如使用`android.support.v7.widget.Toolbar`替代Action Bar,以及实现颜色主题、过渡动画等。 3. ** Toolbar**: `Toolbar`是AppCompat库中一个重要的组件,它是可定制的Action Bar,可以包含各种视图,如TextView、ImageView等,提供了更大的灵活性和设计自由度。 4. **AppCompatActivity**: 这是AppCompat库提供的关键Activity基类,它扩展了Android的`Activity`类,包含了对Material Design元素的支持。使用`AppCompatActivity`,开发者可以轻松地在所有Android版本上使用新特性,如`onOptionsItemSelected()`方法来处理菜单项点击事件。 5. **Fragment兼容性**: AppCompat库也提供了对`Fragment`的兼容支持,允许在低版本Android上使用`android.support.v4.app.Fragment`,这与新版本的`android.app.Fragment`具有相同的功能和接口。 6. **AutoCompleteTextView, Spinner等UI组件**: AppCompat库对一些常见的UI组件进行了更新,如`AutoCompleteTextView`和`Spinner`,使它们在旧版本的Android上也能展现新的设计和交互效果。 7. **Drawable tinting**: 库支持对Drawable进行着色(tinting),使得开发者可以更容易地更改颜色,适应不同的主题或品牌色彩。 8. **v7包下的其他组件**: AppCompat库还包含了其他的组件,如`CardView`, `RecyclerView`, `SwipeRefreshLayout`等,这些组件在新版本的Android中是原生支持的,但在旧版本上则需要AppCompat库来提供支持。 9. **AndroidX迁移**: 随着AndroidX库的推出,AppCompat库已不再更新,开发者被推荐迁移到AndroidX,其中`appcompat-v7`库对应的AndroidX库为`androidx.appcompat:appcompat`,提供相同的功能并持续得到维护。 `appcompat_v7`是Android开发者的重要工具,它使得应用能在广泛的设备上保持一致的用户体验,同时也让开发者能够利用最新的设计和功能,而无需担心设备的API级别限制。理解和熟练使用AppCompat库是Android开发中不可或缺的知识点。
![jar](https://img-home.csdnimg.cn/images/20210720083455.png)
![rar](https://img-home.csdnimg.cn/images/20210720083606.png)
![zip](https://img-home.csdnimg.cn/images/20210720083736.png)
![zip](https://img-home.csdnimg.cn/images/20210720083736.png)
![zip](https://img-home.csdnimg.cn/images/20210720083736.png)
![rar](https://img-home.csdnimg.cn/images/20210720083606.png)
![aar](https://img-home.csdnimg.cn/images/20210720083646.png)
![rar](https://img-home.csdnimg.cn/images/20210720083606.png)
![zip](https://img-home.csdnimg.cn/images/20210720083736.png)
![zip](https://img-home.csdnimg.cn/images/20210720083736.png)
![rar](https://img-home.csdnimg.cn/images/20210720083606.png)
![jar](https://img-home.csdnimg.cn/images/20210720083455.png)
![package](https://csdnimg.cn/release/downloadcmsfe/public/img/package.f3fc750b.png)
![file-type](https://csdnimg.cn/release/download/static_files/pc/images/minetype/UNKNOWN.png)
![file-type](https://csdnimg.cn/release/download/static_files/pc/images/minetype/UNKNOWN.png)
![file-type](https://csdnimg.cn/release/download/static_files/pc/images/minetype/UNKNOWN.png)
![file-type](https://csdnimg.cn/release/download/static_files/pc/images/minetype/UNKNOWN.png)
![file-type](https://csdnimg.cn/release/download/static_files/pc/images/minetype/UNKNOWN.png)
![file-type](https://csdnimg.cn/release/download/static_files/pc/images/minetype/UNKNOWN.png)
![file-type](https://csdnimg.cn/release/download/static_files/pc/images/minetype/UNKNOWN.png)
![file-type](https://csdnimg.cn/release/download/static_files/pc/images/minetype/UNKNOWN.png)
![file-type](https://csdnimg.cn/release/download/static_files/pc/images/minetype/UNKNOWN.png)
![file-type](https://csdnimg.cn/release/download/static_files/pc/images/minetype/UNKNOWN.png)
![file-type](https://csdnimg.cn/release/download/static_files/pc/images/minetype/UNKNOWN.png)
![file-type](https://csdnimg.cn/release/download/static_files/pc/images/minetype/UNKNOWN.png)
![file-type](https://csdnimg.cn/release/download/static_files/pc/images/minetype/UNKNOWN.png)
![file-type](https://csdnimg.cn/release/download/static_files/pc/images/minetype/UNKNOWN.png)
![file-type](https://csdnimg.cn/release/download/static_files/pc/images/minetype/UNKNOWN.png)
![file-type](https://csdnimg.cn/release/download/static_files/pc/images/minetype/UNKNOWN.png)
![file-type](https://csdnimg.cn/release/download/static_files/pc/images/minetype/JAR.png)
![file-type](https://csdnimg.cn/release/download/static_files/pc/images/minetype/JAR.png)
![file-type](https://csdnimg.cn/release/download/static_files/pc/images/minetype/JAR.png)
![file-type](https://csdnimg.cn/release/download/static_files/pc/images/minetype/UNKNOWN.png)
![file-type](https://csdnimg.cn/release/download/static_files/pc/images/minetype/UNKNOWN.png)
![file-type](https://csdnimg.cn/release/download/static_files/pc/images/minetype/PNG.png)
![file-type](https://csdnimg.cn/release/download/static_files/pc/images/minetype/PNG.png)
![file-type](https://csdnimg.cn/release/download/static_files/pc/images/minetype/PNG.png)
![file-type](https://csdnimg.cn/release/download/static_files/pc/images/minetype/PNG.png)
![file-type](https://csdnimg.cn/release/download/static_files/pc/images/minetype/PNG.png)
![file-type](https://csdnimg.cn/release/download/static_files/pc/images/minetype/PNG.png)
![file-type](https://csdnimg.cn/release/download/static_files/pc/images/minetype/PNG.png)
![file-type](https://csdnimg.cn/release/download/static_files/pc/images/minetype/PNG.png)
![file-type](https://csdnimg.cn/release/download/static_files/pc/images/minetype/PNG.png)
![file-type](https://csdnimg.cn/release/download/static_files/pc/images/minetype/PNG.png)
![file-type](https://csdnimg.cn/release/download/static_files/pc/images/minetype/PNG.png)
![file-type](https://csdnimg.cn/release/download/static_files/pc/images/minetype/PNG.png)
![file-type](https://csdnimg.cn/release/download/static_files/pc/images/minetype/PNG.png)
![file-type](https://csdnimg.cn/release/download/static_files/pc/images/minetype/PNG.png)
![file-type](https://csdnimg.cn/release/download/static_files/pc/images/minetype/PNG.png)
![file-type](https://csdnimg.cn/release/download/static_files/pc/images/minetype/PNG.png)
![file-type](https://csdnimg.cn/release/download/static_files/pc/images/minetype/PNG.png)
![file-type](https://csdnimg.cn/release/download/static_files/pc/images/minetype/PNG.png)
![file-type](https://csdnimg.cn/release/download/static_files/pc/images/minetype/PNG.png)
![file-type](https://csdnimg.cn/release/download/static_files/pc/images/minetype/PNG.png)
![file-type](https://csdnimg.cn/release/download/static_files/pc/images/minetype/PNG.png)
![file-type](https://csdnimg.cn/release/download/static_files/pc/images/minetype/PNG.png)
![file-type](https://csdnimg.cn/release/download/static_files/pc/images/minetype/PNG.png)
![file-type](https://csdnimg.cn/release/download/static_files/pc/images/minetype/PNG.png)
![file-type](https://csdnimg.cn/release/download/static_files/pc/images/minetype/PNG.png)
![file-type](https://csdnimg.cn/release/download/static_files/pc/images/minetype/PNG.png)
![file-type](https://csdnimg.cn/release/download/static_files/pc/images/minetype/PNG.png)
![file-type](https://csdnimg.cn/release/download/static_files/pc/images/minetype/PNG.png)
![file-type](https://csdnimg.cn/release/download/static_files/pc/images/minetype/PNG.png)
![file-type](https://csdnimg.cn/release/download/static_files/pc/images/minetype/PNG.png)
![file-type](https://csdnimg.cn/release/download/static_files/pc/images/minetype/PNG.png)
![file-type](https://csdnimg.cn/release/download/static_files/pc/images/minetype/PNG.png)
![file-type](https://csdnimg.cn/release/download/static_files/pc/images/minetype/PNG.png)
![file-type](https://csdnimg.cn/release/download/static_files/pc/images/minetype/PNG.png)
![file-type](https://csdnimg.cn/release/download/static_files/pc/images/minetype/PNG.png)
![file-type](https://csdnimg.cn/release/download/static_files/pc/images/minetype/PNG.png)
![file-type](https://csdnimg.cn/release/download/static_files/pc/images/minetype/PNG.png)
![file-type](https://csdnimg.cn/release/download/static_files/pc/images/minetype/PNG.png)
![file-type](https://csdnimg.cn/release/download/static_files/pc/images/minetype/PNG.png)
![file-type](https://csdnimg.cn/release/download/static_files/pc/images/minetype/PNG.png)
![file-type](https://csdnimg.cn/release/download/static_files/pc/images/minetype/PNG.png)
![file-type](https://csdnimg.cn/release/download/static_files/pc/images/minetype/PNG.png)
![file-type](https://csdnimg.cn/release/download/static_files/pc/images/minetype/PNG.png)
![file-type](https://csdnimg.cn/release/download/static_files/pc/images/minetype/PNG.png)
![file-type](https://csdnimg.cn/release/download/static_files/pc/images/minetype/PNG.png)
![file-type](https://csdnimg.cn/release/download/static_files/pc/images/minetype/PNG.png)
![file-type](https://csdnimg.cn/release/download/static_files/pc/images/minetype/PNG.png)
![file-type](https://csdnimg.cn/release/download/static_files/pc/images/minetype/PNG.png)
![file-type](https://csdnimg.cn/release/download/static_files/pc/images/minetype/PNG.png)
![file-type](https://csdnimg.cn/release/download/static_files/pc/images/minetype/PNG.png)
![file-type](https://csdnimg.cn/release/download/static_files/pc/images/minetype/PNG.png)
![file-type](https://csdnimg.cn/release/download/static_files/pc/images/minetype/PNG.png)
![file-type](https://csdnimg.cn/release/download/static_files/pc/images/minetype/PNG.png)
![file-type](https://csdnimg.cn/release/download/static_files/pc/images/minetype/PNG.png)
![file-type](https://csdnimg.cn/release/download/static_files/pc/images/minetype/PNG.png)
![file-type](https://csdnimg.cn/release/download/static_files/pc/images/minetype/PNG.png)
![file-type](https://csdnimg.cn/release/download/static_files/pc/images/minetype/PNG.png)
![file-type](https://csdnimg.cn/release/download/static_files/pc/images/minetype/PNG.png)
![file-type](https://csdnimg.cn/release/download/static_files/pc/images/minetype/PNG.png)
![file-type](https://csdnimg.cn/release/download/static_files/pc/images/minetype/PNG.png)
![file-type](https://csdnimg.cn/release/download/static_files/pc/images/minetype/PNG.png)
![file-type](https://csdnimg.cn/release/download/static_files/pc/images/minetype/PNG.png)
![file-type](https://csdnimg.cn/release/download/static_files/pc/images/minetype/PNG.png)
![file-type](https://csdnimg.cn/release/download/static_files/pc/images/minetype/PNG.png)
![file-type](https://csdnimg.cn/release/download/static_files/pc/images/minetype/PNG.png)
![file-type](https://csdnimg.cn/release/download/static_files/pc/images/minetype/PNG.png)
![file-type](https://csdnimg.cn/release/download/static_files/pc/images/minetype/PNG.png)
![file-type](https://csdnimg.cn/release/download/static_files/pc/images/minetype/PNG.png)
![file-type](https://csdnimg.cn/release/download/static_files/pc/images/minetype/PNG.png)
![file-type](https://csdnimg.cn/release/download/static_files/pc/images/minetype/PNG.png)
![file-type](https://csdnimg.cn/release/download/static_files/pc/images/minetype/PNG.png)
![file-type](https://csdnimg.cn/release/download/static_files/pc/images/minetype/PNG.png)
![file-type](https://csdnimg.cn/release/download/static_files/pc/images/minetype/PNG.png)
![file-type](https://csdnimg.cn/release/download/static_files/pc/images/minetype/PNG.png)
![file-type](https://csdnimg.cn/release/download/static_files/pc/images/minetype/PNG.png)
![file-type](https://csdnimg.cn/release/download/static_files/pc/images/minetype/PNG.png)
![file-type](https://csdnimg.cn/release/download/static_files/pc/images/minetype/PNG.png)
![file-type](https://csdnimg.cn/release/download/static_files/pc/images/minetype/PNG.png)
![file-type](https://csdnimg.cn/release/download/static_files/pc/images/minetype/PNG.png)
- 1
- 2
- 3
- 4
- 5
- 6
![avatar](https://profile-avatar.csdnimg.cn/0ebbffde98574d3594d3d9498b1b71f8_a462464126.jpg!1)
- 粉丝: 33
- 资源: 2
我的内容管理 展开
我的资源 快来上传第一个资源
我的收益
登录查看自己的收益我的积分 登录查看自己的积分
我的C币 登录后查看C币余额
我的收藏
我的下载
下载帮助
![voice](https://csdnimg.cn/release/downloadcmsfe/public/img/voice.245cc511.png)
![center-task](https://csdnimg.cn/release/downloadcmsfe/public/img/center-task.c2eda91a.png)
![dialog-icon](https://csdnimg.cn/release/downloadcmsfe/public/img/green-success.6a4acb44.png)
- 1
- 2
前往页