小编ddk*_*ddk的帖子

尝试创建发布签名的 apk 时，构建在任务中失败
app:uploadCrashlyticsMappingFileRelease'.Host name must not be empty.

我已经启用了混淆功能。

buildTypes {

        release {

            minifyEnabled true // Enables code shrinking, obfuscation, and optimization

            shrinkResources true // Enables resource shrinking, which is performed by the Android Gradle plugin


            firebaseCrashlytics {

                mappingFileUploadEnabled true
            }

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

另外，使用

    apply plugin: 'com.android.application'
    
       apply plugin: 'com.google.gms.google-services'
    
       // Apply the Crashlytics Gradle plugin
    
       apply plugin: 'com.google.firebase.crashlytics'
    
        implementation 'com.google.firebase:firebase-auth:20.0.1'
        implementation 'com.google.firebase:firebase-firestore:22.0.1'
        implementation 'com.google.firebase:firebase-core:18.0.0'
    
        //the Firebase SDK for Google Analytics.
        implementation 'com.google.firebase:firebase-analytics:18.0.0'
    
        //the Firebase …

我想设置一个jLabel带dimension(50,75)内JFrame。

我尝试使用

label.setPreferredSize(new Dimension(50, 75)); 

但它不起作用。我怎样才能做到这一点？