为Android Wear生成签名apk时出错

为android wear生成签名APK时出现以下错误

Error:Execution failed for task ':wear:transformClassesWithDexForRelease'.
> com.android.build.api.transform.TransformException: com.android.ide.common.process.ProcessException: java.util.concurrent.ExecutionException: com.android.dex.DexException: Multiple dex files define Landroid/support/v4/accessibilityservice/AccessibilityServiceInfoCompat$AccessibilityServiceInfoVersionImpl;

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虽然当我调试时，它在设备或模拟器中完美地运行。但每次我尝试生成Android Wear的签名APK时，都会出现上述问题。

我解决问题的方法是编辑mobile和Wear模块的build.gradle文件。在mobile和wear模块的“build.gradle”文件的defaultConfig{}中添加“multiDexEnabled true”。样品如下

android {
    defaultConfig {
       ....
             multiDexEnabled true
        ...  
    }
}