更改目录结构

app/src/main/java/com/aiosman/riderpro/test/MockDataSource.kt

@@ -0,0 +1,31 @@
+package com.aiosman.riderpro.test
+
+import kotlin.math.min
+
+class MockDataContainer<T>(
+    val success: Boolean,
+    val data: T?
+) {
+
+}
+
+class MockListContainer<T>(
+    val total: Int,
+    val page: Int,
+    val pageSize: Int,
+    val list: List<T>
+) {
+
+}
+
+abstract class MockDataSource<T> {
+    var list = mutableListOf<T>()
+    suspend fun fetchData(page: Int, pageSize: Int): MockDataContainer<MockListContainer<T>> {
+        // over page return empty
+        if (page * pageSize > list.size) {
+            return MockDataContainer(false, MockListContainer(0, page, pageSize, emptyList()))
+        }
+        val backData = list.subList((page - 1) * pageSize, min(page * pageSize, list.size))
+        return MockDataContainer(true, MockListContainer(list.size, page, pageSize, backData))
+    }
+}

app/src/main/java/com/aiosman/riderpro/test/SimpleUtils.kt

@@ -0,0 +1,51 @@
+package com.aiosman.riderpro.test
+
+import androidx.paging.PagingSource
+import androidx.paging.PagingState
+import com.aiosman.riderpro.model.MomentItem
+import kotlinx.coroutines.delay
+import kotlin.math.ceil
+
+class TestBackend(
+    private val backendDataList: List<MomentItem>,
+    private val loadDelay: Long = 500,
+) {
+    val DataBatchSize = 5
+    class DesiredLoadResultPageResponse(val data: List<MomentItem>)
+    /** Returns [DataBatchSize] items for a key */
+    fun searchItemsByKey(key: Int): DesiredLoadResultPageResponse {
+        val maxKey = ceil(backendDataList.size.toFloat() / DataBatchSize).toInt()
+        if (key >= maxKey) {
+            return DesiredLoadResultPageResponse(emptyList())
+        }
+        val from = key * DataBatchSize
+        val to = minOf((key + 1) * DataBatchSize, backendDataList.size)
+        val currentSublist = backendDataList.subList(from, to)
+        return DesiredLoadResultPageResponse(currentSublist)
+    }
+    fun getAllData() = TestPagingSource(this, loadDelay)
+}
+class TestPagingSource(
+    private val backend: TestBackend,
+    private val loadDelay: Long,
+) : PagingSource<Int, MomentItem>() {
+    override suspend fun load(params: LoadParams<Int>): LoadResult<Int, MomentItem> {
+        // Simulate latency
+        delay(loadDelay)
+        val pageNumber = params.key ?: 0
+        val response = backend.searchItemsByKey(pageNumber)
+        // Since 0 is the lowest page number, return null to signify no more pages should
+        // be loaded before it.
+        val prevKey = if (pageNumber > 0) pageNumber - 1 else null
+        // This API defines that it's out of data when a page returns empty. When out of
+        // data, we return `null` to signify no more pages should be loaded
+        val nextKey = if (response.data.isNotEmpty()) pageNumber + 1 else null
+        return LoadResult.Page(data = response.data, prevKey = prevKey, nextKey = nextKey)
+    }
+    override fun getRefreshKey(state: PagingState<Int, MomentItem>): Int? {
+        return state.anchorPosition?.let {
+            state.closestPageToPosition(it)?.prevKey?.plus(1)
+                ?: state.closestPageToPosition(it)?.nextKey?.minus(1)
+        }
+    }
+}

app/src/main/java/com/aiosman/riderpro/test/TestStreetMap.kt

@@ -0,0 +1,28 @@
+package com.aiosman.riderpro.test
+
+data class StreetPosition(
+    val name:String,
+    val lat:Double,
+    val lng:Double
+)
+val countries = listOf(
+    StreetPosition("哈龙湾, 越南",16.5000, 107.1000),
+    StreetPosition("芽庄, 越南",12.2500, 109.0833),
+    StreetPosition("岘港, 越南",16.0667, 108.2167),
+    StreetPosition("美奈, 越南",11.9333, 108.9833),
+    StreetPosition("富国岛, 越南",10.0000, 104.0000),
+    StreetPosition("金三角, 泰国, 缅甸, 老挝",20.2500, 99.7500),
+    StreetPosition("普吉岛, 泰国",7.9444, 98.3000),
+    StreetPosition("苏梅岛, 泰国",9.5333, 99.9333),
+    StreetPosition("曼谷, 泰国",13.7500, 100.5000),
+    StreetPosition("马六甲, 马来西亚",2.2000, 102.2500),
+    StreetPosition("兰卡威群岛, 马来西亚",6.3000, 99.9000),
+    StreetPosition("沙巴, 马来西亚",6.0833, 116.0833),
+    StreetPosition("巴厘岛, 印度尼西亚",8.3333, 115.1000),
+    StreetPosition("龙目岛, 印度尼西亚",8.3333, 116.4000),
+    StreetPosition("婆罗洲, 印度尼西亚",3.0000, 114.0000),
+    StreetPosition("宿务, 菲律宾",10.3167, 123.8833),
+    StreetPosition("长滩岛, 菲律宾",11.5833, 121.9167),
+    StreetPosition("保和岛, 菲律宾",10.3000, 123.3333),
+    StreetPosition("科隆岛, 菲律宾",5.1167, 119.3333)
+)