除錯過程中如果出現上述錯誤 

最好的解決辦法是把build.gradle檔案中的下面部分：

dependencies {
    implementation fileTree(include: ['*.jar'], dir: 'libs')
    implementation 'com.android.support:appcompat-v7:27.1.1'
implementation 'com.android.support:recyclerview-v7:27.1.1'
implementation 'com.android.support:design:27.1.1'
implementation 'com.squareup.picasso:picasso:2.5.2'
 
testCompile 'junit:junit:4.12'
implementation 'com.google.code.gson:gson:2.2.4'
implementation 'com.android.support.constraint:constraint-layout:1.1.1'
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 files('libs/okhttp-3.2.0.jar')


    
}