在API级别23中使用Android数据绑定

Question

.NET developer new to the Android world here. I'm currently developing an app for the Vuzix M300 smart glasses. The Vuzix SDK uses Android 6.0 API Level 23. I would also like to use Android's Data Binding Library, but I'm having trouble getting my project to build with that enabled. My app build.gradle file originally was setup as follows:

apply plugin: 'com.android.application'

android {
    compileSdkVersion 'Vuzix Corporation:Vuzix M300 SDK:23'
    defaultConfig {
        applicationId "xxx.xxxx"
        minSdkVersion 23
        targetSdkVersion 23
        versionCode 1
        versionName "1.0"
        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
        dataBinding { enabled = true }
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
    productFlavors {
    }
}

ext {
    support_version = '23.4.0'
}

dependencies {
    implementation fileTree(include: ['*.jar'], dir: 'libs')
    implementation "com.android.support:appcompat-v7:$support_version"
    implementation 'com.android.support.constraint:constraint-layout:1.0.2'
    testImplementation 'junit:junit:4.12'
    androidTestImplementation 'com.android.support.test:runner:1.0.2'
    androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2'
}

But that was giving me errors so I added the following line after some searching online:

implementation "com.android.support:support-v4:$support_version"

This resulted in a different error, which is where I'm stumped:

Program type already present: android.support.v4.accessibilityservice.AccessibilityServiceInfoCompat Message{kind=ERROR, text=Program type already present: android.support.v4.accessibilityservice.AccessibilityServiceInfoCompat, sources=[Unknown source file], tool name=Optional.of(D8)}

It seems the v4 support repository I added is causing conflicts with the v7 I already have in there, but I'm not sure how to get around this. I've run into the same error but for AsyncTasks as well.

Does anyone have any ideas? Would be much appreciated.

Answer 1

您不必显式添加implementation "com.android.support:support-v4:$support_version"支持库，因为V7兼容库隐式依赖于V4。