update

app/src/main/java/io/legado/app/data/api/CommonHttpApi.kt

@@ -13,4 +13,6 @@ interface CommonHttpApi {
     fun post(@Url url: String, @FieldMap map: Map<String, String>): Deferred<String>
 
 
+    @GET
+    fun get(@Url url: String) : Deferred<String>
 }

app/src/main/java/io/legado/app/help/coroutine/Coroutine.kt

@@ -0,0 +1,89 @@
+package io.legado.app.help.coroutine
+
+import kotlinx.coroutines.*
+
+class Coroutine<T>(private val domain: (suspend CoroutineScope.() -> T)? = null) : CoroutineScope by MainScope() {
+
+    companion object {
+
+        fun <T> of(value: suspend CoroutineScope.() -> T): Coroutine<T> {
+            return Coroutine(value)
+        }
+    }
+
+    private var start: (() -> Unit)? = null
+    private var success: ((T?) -> Unit)? = null
+    private var error: ((Throwable) -> Unit)? = null
+    private var finally: (() -> Unit)? = null
+
+    private var value: T? = null
+
+    init {
+        val job: Job = launch {
+            tryCatch(
+                {
+                    start?.let { it() }
+
+
+                    val result: T? = withContext(Dispatchers.IO) {
+                        domain?.let {
+                            value = it()
+                            return@let value
+                        }
+                    }
+
+                    success?.let { it(result) }
+
+                },
+                { e ->
+                    error?.let { it(e) }
+                },
+                {
+                    finally?.let { it() }
+                })
+        }
+    }
+
+    fun onStart(start: (() -> Unit)): Coroutine<T> {
+        this.start = start
+        return this@Coroutine
+    }
+//
+//    fun <U> map(func: Function<T, U>): Coroutine<U> {
+//        return of { func.apply(value) }
+//    }
+//
+//    fun <U> flatMap(func: Function<T, Coroutine<U>>): Coroutine<U> {
+//        return func.apply(value)
+//    }
+
+    fun onSuccess(success: (T?) -> Unit): Coroutine<T> {
+        this.success = success
+        return this@Coroutine
+    }
+
+    fun onError(error: (Throwable) -> Unit): Coroutine<T> {
+        this.error = error
+        return this@Coroutine
+    }
+
+    fun onFinally(finally: () -> Unit): Coroutine<T> {
+        this.finally = finally
+        return this@Coroutine
+    }
+
+    private suspend fun tryCatch(
+        tryBlock: suspend CoroutineScope.() -> Unit,
+        errorBlock: (suspend CoroutineScope.(Throwable) -> Unit)? = null,
+        finallyBlock: (suspend CoroutineScope.() -> Unit)? = null
+    ) {
+        try {
+            coroutineScope { tryBlock() }
+        } catch (e: Throwable) {
+            coroutineScope { errorBlock?.let { it(e) } }
+        } finally {
+            coroutineScope { finallyBlock?.let { it() } }
+        }
+    }
+
+}

app/src/main/java/io/legado/app/help/coroutine/Function.kt

@@ -0,0 +1,7 @@
+package io.legado.app.help.coroutine
+
+interface Function<T, R> {
+
+    fun apply(t: T?): R
+
+}

app/src/main/java/io/legado/app/ui/search/SearchActivity.kt

@@ -14,7 +14,6 @@ class SearchActivity : BaseActivity<SearchViewModel>() {
         get() = R.layout.activity_search
 
     override fun onViewModelCreated(viewModel: SearchViewModel, savedInstanceState: Bundle?) {
-
     }
 
 }

app/src/main/java/io/legado/app/ui/search/SearchViewModel.kt

@@ -1,44 +1,65 @@
 package io.legado.app.ui.search
 
 import android.app.Application
+import android.util.Log
 import androidx.lifecycle.LiveData
 import androidx.lifecycle.MutableLiveData
 import io.legado.app.base.BaseViewModel
 import io.legado.app.data.api.CommonHttpApi
 import io.legado.app.data.entities.SearchBook
+import io.legado.app.help.coroutine.Coroutine
+import io.legado.app.help.coroutine.Function
 import io.legado.app.help.http.HttpHelper
+import kotlinx.coroutines.*
 import kotlinx.coroutines.Dispatchers.IO
-import kotlinx.coroutines.coroutineScope
-import kotlinx.coroutines.launch
-import kotlinx.coroutines.withContext
 import org.jetbrains.anko.error
+import java.lang.StringBuilder
 
 class SearchViewModel(application: Application) : BaseViewModel(application) {
 
     val searchBooks: LiveData<List<SearchBook>> = MutableLiveData()
 
-    fun search(start: () -> Unit, finally: () -> Unit) {
-        launchOnUI(
-            {
-                start()
-                val searchResponse = withContext(IO) {
-                    HttpHelper.getApiService<CommonHttpApi>(
-                        "http:www.baidu.com"
-                    ).post("", mutableMapOf(Pair("key", "value")))
-                }
+    fun search(start: (() -> Unit)? = null, finally: (() -> Unit)? = null) {
+//        launchOnUI(
+//            {
+//                start?.let { it() }
+//                val searchResponse = withContext(IO) {
+//                    val response: Deferred<String> = HttpHelper.getApiService<CommonHttpApi>(
+//                        "http://www.baidu.com"
+//                    ).get("http://www.baidu.com")
+//
+//                }
+//
+////                val result = searchResponse.await()
+////
+////                println(result)
+//            },
+//            { error { "${it.message}" } },
+//            { finally?.let { it() } })
 
-                val result = searchResponse.await()
-            },
-            { error { "${it.message}" } },
-            { finally() })
+       val task =  Coroutine.of {
+            val response: String = HttpHelper.getApiService<CommonHttpApi>(
+                "http://www.baidu.com"
+            ).get("http://www.baidu.com").await()
 
-        launchOnUI({
-            //TODO
-        })
-
-        launch {
+            Log.e("TAG1", Thread.currentThread().name)
 
+            response
         }
+            .onStart {
+                Log.e("TAG!", "start")
+            }
+            .onSuccess {
+               Log.e("TAG!", "success: $it")
+            }
+            .onError {
+                error { "${it.message}" }
+            }
+            .onFinally {
+                Log.e("TAG!", "finally")
+            }
+
+//        task.cancel()
     }
 
 }