整理依赖关系，增加支付库

.gitignore

 *.iml
 .gradle
 /local.properties
-/.idea/caches
-/.idea/libraries
-/.idea/modules.xml
-/.idea/workspace.xml
-/.idea/navEditor.xml
-/.idea/assetWizardSettings.xml
+/.idea/
 .DS_Store
 /build
 /captures

.idea/.gitignore

-# Default ignored files
-/shelf/
-/workspace.xml

.idea/compiler.xml

-<?xml version="1.0" encoding="UTF-8"?>
-<project version="4">
-  <component name="CompilerConfiguration">
-    <bytecodeTargetLevel target="1.8" />
-  </component>
-</project>
\ No newline at end of file

.idea/gradle.xml

-<?xml version="1.0" encoding="UTF-8"?>
-<project version="4">
-  <component name="GradleMigrationSettings" migrationVersion="1" />
-  <component name="GradleSettings">
-    <option name="linkedExternalProjectsSettings">
-      <GradleProjectSettings>
-        <option name="testRunner" value="PLATFORM" />
-        <option name="distributionType" value="DEFAULT_WRAPPED" />
-        <option name="externalProjectPath" value="$PROJECT_DIR$" />
-        <option name="modules">
-          <set>
-            <option value="$PROJECT_DIR$" />
-            <option value="$PROJECT_DIR$/app" />
-          </set>
-        </option>
-        <option name="resolveModulePerSourceSet" value="false" />
-      </GradleProjectSettings>
-    </option>
-  </component>
-</project>
\ No newline at end of file

.idea/jarRepositories.xml

-<?xml version="1.0" encoding="UTF-8"?>
-<project version="4">
-  <component name="RemoteRepositoriesConfiguration">
-    <remote-repository>
-      <option name="id" value="central" />
-      <option name="name" value="Maven Central repository" />
-      <option name="url" value="https://repo1.maven.org/maven2" />
-    </remote-repository>
-    <remote-repository>
-      <option name="id" value="jboss.community" />
-      <option name="name" value="JBoss Community repository" />
-      <option name="url" value="https://repository.jboss.org/nexus/content/repositories/public/" />
-    </remote-repository>
-    <remote-repository>
-      <option name="id" value="MavenRepo" />
-      <option name="name" value="MavenRepo" />
-      <option name="url" value="https://repo.maven.apache.org/maven2/" />
-    </remote-repository>
-    <remote-repository>
-      <option name="id" value="BintrayJCenter" />
-      <option name="name" value="BintrayJCenter" />
-      <option name="url" value="https://jcenter.bintray.com/" />
-    </remote-repository>
-    <remote-repository>
-      <option name="id" value="Google" />
-      <option name="name" value="Google" />
-      <option name="url" value="https://dl.google.com/dl/android/maven2/" />
-    </remote-repository>
-  </component>
-</project>
\ No newline at end of file

.idea/misc.xml

-<?xml version="1.0" encoding="UTF-8"?>
-<project version="4">
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_8" default="true" project-jdk-name="1.8" project-jdk-type="JavaSDK">
-    <output url="file://$PROJECT_DIR$/build/classes" />
-  </component>
-  <component name="ProjectType">
-    <option name="id" value="Android" />
-  </component>
-</project>
\ No newline at end of file

.idea/runConfigurations.xml

-<?xml version="1.0" encoding="UTF-8"?>
-<project version="4">
-  <component name="RunConfigurationProducerService">
-    <option name="ignoredProducers">
-      <set>
-        <option value="com.android.tools.idea.compose.preview.runconfiguration.ComposePreviewRunConfigurationProducer" />
-      </set>
-    </option>
-  </component>
-</project>
\ No newline at end of file

.idea/vcs.xml

-<?xml version="1.0" encoding="UTF-8"?>
-<project version="4">
-  <component name="VcsDirectoryMappings">
-    <mapping directory="$PROJECT_DIR$" vcs="Git" />
-    <mapping directory="$PROJECT_DIR$/miyafastcashier" vcs="Git" />
-  </component>
-</project>
\ No newline at end of file

app/build.gradle

@@ -36,7 +36,7 @@ android {
 }
 
 dependencies {
-
+    implementation fileTree(include: ['*.jar'], dir: 'libs')
     implementation "org.jetbrains.kotlin:kotlin-stdlib:$kotlin_version"
     implementation 'androidx.core:core-ktx:1.3.1'
     implementation 'androidx.appcompat:appcompat:1.2.0'
@@ -46,6 +46,14 @@ dependencies {
     implementation 'androidx.lifecycle:lifecycle-viewmodel-ktx:2.2.0'
     implementation 'androidx.annotation:annotation:1.1.0'
     testImplementation 'junit:junit:4.+'
+    implementation "com.squareup.retrofit2:retrofit:2.9.0"
+    implementation 'com.squareup.retrofit2:converter-gson:2.9.0'
+    implementation('com.squareup.retrofit2:converter-simplexml:2.9.0') {
+        exclude group: 'xpp3', module: 'xpp3'
+        exclude group: 'stax', module: 'stax-api'
+        exclude group: 'stax', module: 'stax'
+    }
+    implementation 'com.alibaba:fastjson:1.2.8'
     androidTestImplementation 'androidx.test.ext:junit:1.1.2'
     androidTestImplementation 'androidx.test.espresso:espresso-core:3.3.0'
 }
\ No newline at end of file

app/src/main/java/com/miya/fastcashier/beans/BaseDO.java

+package com.miya.fastcashier.beans;
+
+
+import java.io.Serializable;
+
+/**
+ * 基础DO类，提供toString快方法
+ * Created by fys on 2016/3/31.
+ */
+public class BaseDO implements Serializable {
+
+    private static final long serialVersionUID = 1L;
+
+//    public String toString() {
+//        return ToStringBuilder.reflectionToString(this, ToStringStyle.SHORT_PREFIX_STYLE);
+//    }
+}
+