### Basic CityPicker Dialog Implementation and Configuration

Source: https://github.com/zaaach/citypicker/blob/master/README.md

Demonstrates how to initialize and show the CityPicker dialog. It covers setting hot cities, a pre-located city, enabling animations, and handling user interactions (city selection, cancellation) and location requests. The `onLocate` callback provides an interface for integrating with your app's own location service.

```java
List<HotCity> hotCities = new ArrayList<>();
hotCities.add(new HotCity("北京", "北京", "101010100")); //code为城市代码
hotCities.add(new HotCity("上海", "上海", "101020100"));
hotCities.add(new HotCity("广州", "广东", "101280101"));
hotCities.add(new HotCity("深圳", "广东", "101280601"));
hotCities.add(new HotCity("杭州", "浙江", "101210101"));
......

CityPicker.from(activity) //activity或者fragment
  .enableAnimation(true)	//启用动画效果，默认无
  .setAnimationStyle(anim)	//自定义动画
  .setLocatedCity(new LocatedCity("杭州", "浙江", "101210101")))  //APP自身已定位的城市，传null会自动定位（默认）
  .setHotCities(hotCities)	//指定热门城市
  .setOnPickListener(new OnPickListener() {
    @Override
    public void onPick(int position, City data) {
      Toast.makeText(getApplicationContext(), data.getName(), Toast.LENGTH_SHORT).show();
    }
      
    @Override
    public void onCancel(){
      Toast.makeText(getApplicationContext(), "取消选择", Toast.LENGTH_SHORT).show();     
    }
      
    @Override
    public void onLocate() {
      //定位接口，需要APP自身实现，这里模拟一下定位
      new Handler().postDelayed(new Runnable() {
        @Override
        public void run() {
          //定位完成之后更新数据
          CityPicker.getInstance()
            .locateComplete(new LocatedCity("深圳", "广东", "101280601"), LocateState.SUCCESS);
        }
      }, 3000);
    }
  })
  .show();
```

--------------------------------

### Add JitPack Repository to Project Gradle

Source: https://github.com/zaaach/citypicker/blob/master/README.md

Configure your project's root `build.gradle` file to include the JitPack Maven repository, which is necessary to resolve the CityPicker library dependency.

```groovy
allprojects {
	repositories {
		...
		maven { url 'https://jitpack.io' }
	}
}
```

--------------------------------

### Add CityPicker Library Dependency to App Module

Source: https://github.com/zaaach/citypicker/blob/master/README.md

Include the CityPicker library as an implementation dependency in your app module's `build.gradle` file. Replace `x.y.z` with the latest version from JitPack.

```groovy
dependencies {
	 implementation 'com.github.zaaach:CityPicker:x.y.z'
}
```

--------------------------------

### Apply Default CityPicker Theme in AndroidManifest

Source: https://github.com/zaaach/citypicker/blob/master/README.md

In your `AndroidManifest.xml`, apply the `@style/DefaultCityPickerTheme` to the activity where you intend to use the CityPicker dialog.

```xml
<activity android:name=".MainActivity" android:theme="@style/DefaultCityPickerTheme">
  ......
</activity>
```

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