我开始学习android并尝试调用WebService。没有WebService调用的基本代码运行良好。任务执行失败':app:transformClassesWithJarMergingForDebug'
然后我添加了两个文件到库 android-support-v4.jar和android-async-http-1.4.4.jar。
我收到以下错误
错误:执行失败的任务 ':应用程序:transformClassesWithJarMergingForDebug'。
com.android.build.api.transform.TransformException: java.util.zip.ZipException: duplicate entry: android/support/v4/util/MapCollections$ArrayIterator.class
下面是代码的一部分,这是需要
public void invokeWS(RequestParams params) {
String url = "http://localhost:8080/OnlineStore/kmsg/grocery/Login";
AsyncHttpClient client = new AsyncHttpClient();
client.post(url, params, new AsyncHttpResponseHandler(){
@Override
public void onSuccess(String response){
try{
JSONObject jobj = new JSONObject(response);
Toast.makeText(getApplicationContext(), "You are logged in", Toast.LENGTH_LONG).show();
}
catch(JSONException jexec){
Toast.makeText(getApplicationContext(), "Error Occured [Server's JSON response might be invalid]!", Toast.LENGTH_LONG).show();
jexec.printStackTrace();
}
} // End of onSuccess
@Override
public void onFailure(int Status, Throwable error, String content){
Toast.makeText(getApplicationContext(), "You failed to login", Toast.LENGTH_LONG).show();
} // End of onFailure
}
); // End of post function
下面是我的build.gradle 应用插件:'com.android.application'
android {
compileSdkVersion 23
buildToolsVersion "23.0.2"
defaultConfig {
applicationId "kmsg.com.listwithadapters"
minSdkVersion 16
targetSdkVersion 23
versionCode 1
versionName "1.0"
multiDexEnabled true
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
}
}
}
dependencies {
compile fileTree(dir: 'libs', include: ['*.jar'])
testCompile 'junit:junit:4.12'
compile 'com.android.support:appcompat-v7:23.1.1'
compile 'com.google.android.gms:play-services-appindexing:8.1.0'
compile files('libs/android-async-http-1.4.4.jar')
}
从很明显的错误,有是一些重复的条目,但为什么构建系统不能自行解决它?任何快速的见解都会帮助我理解这个错误的原因。
感谢网友
minifyEnabled false => true。并且您是否需要multiDexEnabled为true? –
minifyEnabled true尚未解决问题。另一点是,当我只建造时,它是成功的。只有当我运行它时才会发生错误。但错误说,BUILD ERROR。有点奇怪! – Harry
怎样去除编译文件('libs/android-async-http-1.4.4.jar')? –