Manifest merger failed : Attribute meta-data#android.support.VERSION@value..

在添加leakcanary依赖时出现如下问题

Manifest merger failed : Attribute meta-data#android.support.VERSION@value value=(25.4.0) from [com.android.support:design:25.4.0] AndroidManifest.xml:28:13-35
	is also present at [com.android.support:support-fragment:26.0.0] AndroidManifest.xml:28:13-35 value=(26.0.0).
	Suggestion: add 'tools:replace="android:value"' to  element at AndroidManifest.xml:26:9-28:38 to override.

当前build.gradle如下：

apply plugin: 'com.android.application'

android {
    compileSdkVersion 25
    defaultConfig {
        applicationId "com.*.*"
        minSdkVersion 19
        targetSdkVersion 25
        versionCode 1
        versionName "1.0"
        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
        vectorDrawables.useSupportLibrary = true
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
}

dependencies {
    implementation fileTree(include: ['*.jar'], dir: 'libs')
    implementation 'com.android.support.constraint:constraint-layout:1.1.3'
    androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2'
    implementation 'com.android.support:appcompat-v7:25.4.0'
    implementation 'com.android.support:design:25.4.0'
    implementation 'com.jakewharton:butterknife:8.8.1'
    annotationProcessor 'com.jakewharton:butterknife-compiler:8.8.1'
    implementation 'com.youth.banner:banner:1.4.10'

    implementation 'com.github.bumptech.glide:glide:4.2.0'
    annotationProcessor 'com.github.bumptech.glide:compiler:4.2.0'

    /*webview*/
    implementation 'com.just.agentweb:agentweb:4.0.2' // (必选)
    implementation 'com.just.agentweb:download:4.0.2' // (可选)
    implementation 'com.just.agentweb:filechooser:4.0.2'// (可选)

    /*内存泄漏*/
    debugImplementation 'com.squareup.leakcanary:leakcanary-android:1.6.2'
    releaseImplementation 'com.squareup.leakcanary:leakcanary-android-no-op:1.6.2'
        // Optional, if you use support library fragments:
    debugImplementation 'com.squareup.leakcanary:leakcanary-support-fragment:1.6.2'
}

原因:可能leakcannary中的存在了support:appcompat-v7不同的或者比app较高版本导致的
解决方法：
因为我的项目是使用leakcanary时候出现的，所以我将leakcanary的版本降低就解决了（由1.6.2变为1.5.4），最终build.gradle如下：

apply plugin: 'com.android.application'

android {
    compileSdkVersion 25
    defaultConfig {
        applicationId "com.hj.wanandroidhj"
        minSdkVersion 19
        targetSdkVersion 25
        versionCode 1
        versionName "1.0"
        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
        vectorDrawables.useSupportLibrary = true
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
}

dependencies {
    implementation fileTree(include: ['*.jar'], dir: 'libs')
    implementation 'com.android.support.constraint:constraint-layout:1.1.3'
    androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2'
    implementation 'com.android.support:appcompat-v7:25.4.0'
    implementation 'com.android.support:design:25.4.0'
    implementation 'com.jakewharton:butterknife:8.8.1'
    annotationProcessor 'com.jakewharton:butterknife-compiler:8.8.1'
    implementation 'com.youth.banner:banner:1.4.10'

    implementation 'com.github.bumptech.glide:glide:4.2.0'
    annotationProcessor 'com.github.bumptech.glide:compiler:4.2.0'

    /*webview*/
    implementation 'com.just.agentweb:agentweb:4.0.2' // (必选)
    implementation 'com.just.agentweb:download:4.0.2' // (可选)
    implementation 'com.just.agentweb:filechooser:4.0.2'// (可选)

    /*内存泄漏*/
    debugImplementation 'com.squareup.leakcanary:leakcanary-android:1.5.4'
    releaseImplementation 'com.squareup.leakcanary:leakcanary-android-no-op:1.5.4'

    /*64k 分包*/
//    implementation 'com.android.support:multidex:1.0.3'
}

希望我遇到的这个问题对你有帮助