“ com.android.support:appcompat-v7:28.0.0”錯誤

Question

每當我添加Firebase數據庫依賴項時，都會顯示appcompat錯誤。 像這樣

“所有com.android.support庫必須使用完全相同的版本規范（混合版本可能導致運行時崩潰）。找到的版本28.0.0，26.1.0。示例包括com.android.support:animated-vector-drawable:28.0 .0和com.android.support:support-media-compat:26.1.0“

   dependencies {
        implementation fileTree(dir: 'libs', include: ['*.jar'])
        implementation 'com.android.support:appcompat-v7:28.0.0'
        implementation 'com.android.support.constraint:constraint- 
        layout:1.1.3'
        implementation 'com.google.firebase:firebase-database:16.1.0'
        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'
   }

Answer 1

“所有com.android.support庫必須使用完全相同的版本規范（混合版本可能導致運行時崩潰）。找到的版本28.0.0，26.1.0。示例包括com.android.support:animated-vector-drawable:28.0 .0和com.android.support:support-media-compat:26.1.0“

解決方案：將com.android.support:support-v4:28.0.0依賴項添加到gradle文件中。

dependencies {
    implementation fileTree(dir: 'libs', include: ['*.jar'])
    implementation 'com.android.support:appcompat-v7:28.0.0'
    implementation 'com.android.support.constraint:constraint- 
    layout:1.1.3'
    implementation 'com.google.firebase:firebase-database:16.1.0'
    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'

    // Add this line
    implementation 'com.android.support:support-v4:28.0.0'
}

Answer 2

添加依賴implementation 'com.android.support:support-v4:28.0.0'以及implementation 'com.android.support:appcompat-v7:28.0.0'

支持庫28.0.0的穩定版本，也是android.support包裝下的最后一個功能版本，鼓勵開發人員遷移至AndroidX

  android {
  compileSdkVersion 28
  buildToolsVersion "28.0.3"


 defaultConfig {
 applicationId "com.your_project_name"
 minSdkVersion 23
 targetSdkVersion 28
 versionCode 1
 multiDexEnabled true
 testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
}

 dependencies {
 implementation fileTree(dir: 'libs', include: ['*.jar'])
 implementation 'com.android.support:appcompat-v7:28.0.0'
 implementation 'com.android.support:support-v4:28.0.0'
 implementation 'com.android.support:design:28.0.0'
 implementation 'com.android.support:cardview-v7:28.0.0'
 implementation 'com.android.support:recyclerview-v7:28.0.0'
 implementation 'com.android.support.constraint:constraint- 
    layout:1.1.3'
 implementation 'com.google.firebase:firebase-database:16.1.0'
 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'
 implementation 'com.crashlytics.sdk.android:crashlytics:2.9.5' 
 }

Answer 3

implementation 'com.android.support:support-media-compat:28.0.0'

implementation 'com.android.support:support-v4:28.0.0'

添加到依賴項並更改

implementation 'com.google.firebase:firebase-database:16.1.0'

至

implementation 'com.google.firebase:firebase-database:9.0.2'

這對我有用