將Leaflet Android庫集成到現有的Android應用程序中，需要遵循以下步驟：

1. 添加依賴項：在您的Android項目的build.gradle文件中，添加以下依賴項：

dependencies {
    implementation 'com.github.mapbox:mapbox-android-sdk:9.6.0'
    implementation 'org.apache.leaflet:leaflet-android-library:1.7.1'
}

2. 同步Gradle：點擊Sync Project with Gradle Files按鈕，讓Gradle同步新的依賴項。

3. 在布局文件中添加地圖視圖：在您的布局文件中，添加一個MapView控件：

<com.mapbox.geojson.FeatureCollection
    android:id="@+id/featureCollection"
    android:name="features" />

<com.mapbox.maps.extension.style.layers.generated.symbolLayer
    android:id="@+id/symbolLayer"
    android:name="symbolLayer"
    android:visibility="visible" />

<com.mapbox.maps.extension.style.sources.generated.geoJsonSource
    android:id="@+id/geoJsonSource"
    android:name="geoJsonSource"
    android:visibility="visible" />

<com.mapbox.maps.extension.style.style
    android:id="@+id/style"
    android:visibility="visible" />

<com.mapbox.maps.plugin.annotation.generated.PointAnnotationManager
    android:id="@+id/pointAnnotationManager"
    android:visibility="visible" />

<com.mapbox.maps.extension.style.layers.generated.lineLayer
    android:id="@+id/lineLayer"
    android:name="lineLayer"
    android:visibility="visible" />

<com.mapbox.maps.extension.style.sources.generated.vectorSource
    android:id="@+id/vectorSource"
    android:name="vectorSource"
    android:visibility="visible" />

<com.mapbox.maps.plugin.annotation.generated.CircleAnnotationManager
    android:id="@+id/circleAnnotationManager"
    android:visibility="visible" />

<com.mapbox.maps.extension.style.layers.generated.fillLayer
    android:id="@+id/fillLayer"
    android:name="fillLayer"
    android:visibility="visible" />

<com.mapbox.maps.extension.style.sources.generated.imageSource
    android:id="@+id/imageSource"
    android:name="imageSource"
    android:visibility="visible" />

<com.mapbox.maps.extension.style.layers.generated.backgroundLayer
    android:id="@+id/backgroundLayer"
    android:name="backgroundLayer"
    android:visibility="visible" />

<com.mapbox.maps.extension.style.style
    android:id="@+id/style"
    android:visibility="visible" />

<com.mapbox.maps.plugin.annotation.generated.PolygonAnnotationManager
    android:id="@+id/polygonAnnotationManager"
    android:visibility="visible" />

<com.mapbox.maps.extension.style.layers.generated.heatmapLayer
    android:id="@+id/heatmapLayer"
    android:name="heatmapLayer"
    android:visibility="visible" />

<com.mapbox.maps.extension.style.sources.generated.geojsonSource
    android:id="@+id/geojsonSource"
    android:name="geojsonSource"
    android:visibility="visible"