Android Studio导入iextrading4j库失败求助：含MultiDex等错误

Hey there, I’ve helped a few folks work through these exact issues with iextrading4j on Android. Let’s break down the full setup step by step to squash those errors for good.

1. First: Resolve MultiDex Issues #

The transformClassesWith... error often ties to hitting Android’s 65k method limit—iextrading4j pulls in several underlying dependencies that can push your project over this threshold. Here’s how to enable MultiDex properly:

• Update your app-level build.gradle:
  Add the MultiDex dependency and enable it in your defaultConfig:

  android {
      defaultConfig {
          // ... existing configs (minSdkVersion, targetSdkVersion)
          multiDexEnabled true
      }
  }
  
  dependencies {
      // Use this for androidx projects
      implementation 'androidx.multidex:multidex:2.0.1'
      // Or this if you're using the old support library:
      // implementation 'com.android.support:multidex:1.0.3'
  }
  

• Update your Application class:
  If you have a custom Application class, extend MultiDexApplication instead of the default:

  public class MyStockApp extends MultiDexApplication {
      // ... your existing code here
  }
  

  If you don’t have a custom Application class, add this to your AndroidManifest.xml:

  <application
      android:name="androidx.multidex.MultiDexApplication"
      <!-- ... other attributes -->
  >
  

2. Fix JSR305 (findbugs) Conflict #

The findbugs:jsr305:1.3.9 error stems from a dependency clash—Android already includes a version of JSR305, and iextrading4j tries to pull in another. We can exclude this redundant dependency directly from iextrading4j:

• Add iextrading4j with excluded JSR305:
  In your app-level build.gradle, replace your current iextrading4j line with this (use the version you prefer, 2.1.1 or 2.0.1):

  dependencies {
      // For version 2.1.1
      implementation ('pl.zankowski:iextrading4j-all:2.1.1') {
          exclude group: 'com.google.code.findbugs', module: 'jsr305'
      }
  
      // Or for version 2.0.1
      // implementation ('pl.zankowski:iextrading4j-all:2.0.1') {
      //     exclude group: 'com.google.code.findbugs', module: 'jsr305'
      // }
  }
  

• Optional: Force JSR305 Version (If Conflicts Persist)
  If you still see JSR305-related errors, add this to your root-level build.gradle to force a compatible version across all dependencies:

  allprojects {
      repositories {
          // ... your existing repos (google(), mavenCentral(), etc.)
      }
  
      configurations.all {
          resolutionStrategy.force 'com.google.code.findbugs:jsr305:3.0.2'
      }
  }
  

3. Full Working Configuration Example #

Here’s how your app-level build.gradle should look when all settings are combined:

apply plugin: 'com.android.application'

android {
    compileSdkVersion 34 // Use your project's target SDK version
    defaultConfig {
        applicationId "com.yourusername.stocktracker"
        minSdkVersion 21 // If targeting below 21, ensure MultiDex is fully set up
        targetSdkVersion 34
        versionCode 1
        versionName "1.0"
        multiDexEnabled true
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
        }
    }
}

dependencies {
    implementation fileTree(dir: 'libs', include: ['*.jar'])
    implementation 'androidx.appcompat:appcompat:1.6.1'
    implementation 'androidx.multidex:multidex:2.0.1'

    // iextrading4j with excluded JSR305 dependency
    implementation ('pl.zankowski:iextrading4j-all:2.1.1') {
        exclude group: 'com.google.code.findbugs', module: 'jsr305'
    }
}

4. Post-Setup Checks #

• Add Internet Permission: Since you’re fetching data from an API, make sure this line is in your AndroidManifest.xml:

  <uses-permission android:name="android.permission.INTERNET" />
  

• Test with a Simple API Call: Verify the setup works with a basic request (always run network calls on a background thread!):

  new Thread(() -> {
      ICloudClient cloudClient = IEXTradingClient.create();
      try {
          StockQuote appleQuote = cloudClient.execute(new GetQuoteRequestBuilder()
                  .withSymbol("AAPL")
                  .build());
          Log.d("IEX_TEST", "AAPL Latest Price: " + appleQuote.getLatestPrice());
      } catch (IOException e) {
          e.printStackTrace();
      }
  }).start();
  

5. Troubleshooting Remaining Errors #

If you still see transformClassesWith... errors:

• Clean and rebuild your project (Build > Clean Project then Build > Rebuild Project).
• Invalidate caches and restart Android Studio (File > Invalidate Caches... > Invalidate and Restart).
• Ensure you’re using the latest version of the Android Gradle Plugin (check your root build.gradle).

内容的提问来源于stack exchange，提问作者killpwnrang3