update: 允许下自定义线程池looper

Author: wyouflf

README.md

@@ -26,7 +26,7 @@ xUtils 包含了orm, http(s), image, view注解, 但依然很轻量级(251K), 
 
 #### 使用Gradle构建时添加以下依赖即可:
 ```javascript
-implementation 'org.xutils:xutils:3.8.9'
+implementation 'org.xutils:xutils:3.8.10'
 ```
 
 #### 混淆配置参考示例项目sample的配置

build.gradle

@@ -6,7 +6,7 @@ buildscript {
         jcenter()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:3.6.1'
+        classpath 'com.android.tools.build:gradle:4.0.0'
         classpath 'com.jfrog.bintray.gradle:gradle-bintray-plugin:1.8.4'
         classpath 'com.github.dcendents:android-maven-gradle-plugin:2.1'
 

sample/src/main/res/values/strings.xml

@@ -5,5 +5,5 @@
     <string name="remove">移除</string>
     <string name="stop">停止</string>
     <string name="start">开始下载</string>
-    <string name="test_download_url">http://dl.bintray.com/wyouflf/maven/org/xutils/xutils/3.8.9/xutils-3.8.9.aar</string>
+    <string name="test_download_url">http://dl.bintray.com/wyouflf/maven/org/xutils/xutils/3.8.10/xutils-3.8.10.aar</string>
 </resources>

xutils/build.gradle

@@ -5,7 +5,7 @@ apply plugin: 'com.jfrog.bintray'
 def siteUrl = 'https://github.com/wyouflf/xUtils3'
 def gitUrl = 'https://github.com/wyouflf/xUtils3.git'
 group = "org.xutils"
-version = "3.8.9"
+version = "3.8.10"
 
 android {
     compileSdkVersion 28

xutils/src/main/java/org/xutils/common/task/AbsTask.java

@@ -1,5 +1,7 @@
 package org.xutils.common.task;
 
+import android.os.Looper;
+
 import org.xutils.common.Callback;
 
 import java.util.concurrent.Executor;
@@ -57,6 +59,10 @@ public Executor getExecutor() {
         return null;
     }
 
+    public Looper customLooper() {
+        return null;
+    }
+
     protected final void update(int flag, Object... args) {
         if (taskProxy != null) {
             taskProxy.onUpdate(flag, args);

xutils/src/main/java/org/xutils/common/task/TaskProxy.java

@@ -22,6 +22,7 @@
 
     private final AbsTask<ResultType> task;
     private final Executor executor;
+    private final Handler handler;
     private volatile boolean callOnCanceled = false;
     private volatile boolean callOnFinished = false;
 
@@ -30,6 +31,16 @@
         this.task = task;
         this.task.setTaskProxy(this);
         this.setTaskProxy(null);
+
+        // set handler
+        Looper looper = task.customLooper();
+        if (looper != null) {
+            handler = new InternalHandler(looper);
+        } else {
+            handler = sHandler;
+        }
+
+        // set executor
         Executor taskExecutor = task.getExecutor();
         if (taskExecutor == null) {
             taskExecutor = sDefaultExecutor;
@@ -85,42 +96,42 @@ public void run() {
     @Override
     protected void onWaiting() {
         this.setState(State.WAITING);
-        sHandler.obtainMessage(MSG_WHAT_ON_WAITING, this).sendToTarget();
+        handler.obtainMessage(MSG_WHAT_ON_WAITING, this).sendToTarget();
     }
 
     @Override
     protected void onStarted() {
         this.setState(State.STARTED);
-        sHandler.obtainMessage(MSG_WHAT_ON_START, this).sendToTarget();
+        handler.obtainMessage(MSG_WHAT_ON_START, this).sendToTarget();
     }
 
     @Override
     protected void onSuccess(ResultType result) {
         this.setState(State.SUCCESS);
-        sHandler.obtainMessage(MSG_WHAT_ON_SUCCESS, this).sendToTarget();
+        handler.obtainMessage(MSG_WHAT_ON_SUCCESS, this).sendToTarget();
     }
 
     @Override
     protected void onError(Throwable ex, boolean isCallbackError) {
         this.setState(State.ERROR);
-        sHandler.obtainMessage(MSG_WHAT_ON_ERROR, new ArgsObj(this, ex)).sendToTarget();
+        handler.obtainMessage(MSG_WHAT_ON_ERROR, new ArgsObj(this, ex)).sendToTarget();
     }
 
     @Override
     protected void onUpdate(int flag, Object... args) {
         // obtainMessage(int what, int arg1, int arg2, Object obj), arg2 not be used.
-        sHandler.obtainMessage(MSG_WHAT_ON_UPDATE, flag, flag, new ArgsObj(this, args)).sendToTarget();
+        handler.obtainMessage(MSG_WHAT_ON_UPDATE, flag, flag, new ArgsObj(this, args)).sendToTarget();
     }
 
     @Override
     protected void onCancelled(Callback.CancelledException cex) {
         this.setState(State.CANCELLED);
-        sHandler.obtainMessage(MSG_WHAT_ON_CANCEL, new ArgsObj(this, cex)).sendToTarget();
+        handler.obtainMessage(MSG_WHAT_ON_CANCEL, new ArgsObj(this, cex)).sendToTarget();
     }
 
     @Override
     protected void onFinished() {
-        sHandler.obtainMessage(MSG_WHAT_ON_FINISHED, this).sendToTarget();
+        handler.obtainMessage(MSG_WHAT_ON_FINISHED, this).sendToTarget();
     }
 
     @Override
@@ -165,6 +176,10 @@ private InternalHandler() {
             super(Looper.getMainLooper());
         }
 
+        private InternalHandler(Looper looper) {
+            super(looper);
+        }
+
         @Override
         @SuppressWarnings("unchecked")
         public void handleMessage(Message msg) {