之前没问题的项目打开之后Gradle报错：

Try Again以后还是不行，Messages显示如下：

仔细检查没有发现问题，最后新建一个工程把文件挨个拷贝，新工程一切正常，想知道遇到这种问题如何解决，不能总是新建工程吧。最后附上还是有问题的老工程AndroidManifest文件：

package="com.kunpo.loner">

android:label="@string/app_name" android:launchMode="singleTask" android:name="com.kunpo.loner.MainActivity" android:screenOrientation="landscape">

android:name="com.kunpo.loner.wxapi.WXPayEntryActivity"

android:exported="true"

android:launchMode="singleTop" />

android:name="com.alipay.sdk.app.H5PayActivity"

android:configChanges="orientation|keyboardHidden|navigation"

android:exported="false"

android:screenOrientation="behind" >

android:name="com.alipay.sdk.auth.AuthActivity"

android:configChanges="orientation|keyboardHidden|navigation"

android:exported="false"

android:screenOrientation="behind" >

代码排版好像有点问题，请见谅。

补充app下gradle文件：

apply plugin: 'com.android.library'

android {

compileSdkVersion 25

buildToolsVersion "25.0.0"

defaultConfig {

minSdkVersion 9

targetSdkVersion 25

versionCode 1

versionName "1.0"

testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"

applicationId "com.kunpo.loner"

}

buildTypes {

release {

minifyEnabled false

proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'

}

}

useLibrary 'org.apache.http.legacy'

}

dependencies {

//compile fileTree(dir: 'libs', include: ['*.jar'])

androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', {

exclude group: 'com.android.support', module: 'support-annotations'

})

compile 'com.android.support:appcompat-v7:25.3.1'

compile 'com.android.support.constraint:constraint-layout:1.0.2'

testCompile 'junit:junit:4.12'

provided files('libs/classes.jar')

compile 'org.apache.httpcomponents:httpcore:4.4.2'

compile files('libs/alipaySdk-20170407.jar')

compile files('libs/wechat-sdk-android-without-mta-1.1.6.jar')

}

工程根目录gradle文件：

// Top-level build file where you can add configuration options common to all sub-projects/modules.

buildscript {

repositories {

jcenter()

}

dependencies {

classpath 'com.android.tools.build:gradle:2.3.0'

// NOTE: Do not place your application dependencies here; they belong

// in the individual module build.gradle files

}

}

allprojects {

repositories {

jcenter()

}

}

task clean(type: Delete) {

delete rootProject.buildDir

}