ADT中的Android库：类型无法解析错误

实质上：一个库项目声明了一个Activity，一个实现项目使用（子类）这个Activity和一个测试项目练习实现的版本。在这个场景中，我们发现“该类型无法解析，它是从所需的.class文件间接引用的”。如果更改为ADT r13，则不报告问题。代码发行再现：在库：ADT中的Android库：类型无法解析错误

package com.r14.error.lib; 
import android.app.Activity; 
import android.os.Bundle; 

public class R14ErrorLibActivity extends Activity { 
    @Override 
    public void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.main); 
    } 
}

在实施：

package com.r14.error.imp; 
import com.r14.error.lib.R14ErrorLibActivity; 

public class R14ErrorImpActivity extends R14ErrorLibActivity { 
}

在测试：

package com.r14.error.imp.test;  
import com.r14.error.imp.R14ErrorImpActivity;  
import android.test.ActivityUnitTestCase; 

public class R14ErrorLibImpActivityTest extends ActivityUnitTestCase<R14ErrorImpActivity> {  
    public R14ErrorLibImpActivityTest() { 
     super(R14ErrorImpActivity.class); 
    }  
    private static final int ANSWER_TO_THE_ULTIMATE_QUESTION_OF_LIFE_THE_UNIVERSE_AND_EVERYTHING = 42;  
    public void testTest() { 
     assertEquals(ANSWER_TO_THE_ULTIMATE_QUESTION_OF_LIFE_THE_UNIVERSE_AND_EVERYTHING, 42); 
    }  
}

错误：

The type com.r14.error.lib.R14ErrorLibActivity cannot be resolved. It is indirectly referenced from required .class files

如果LIB是（在旧版本的ADT动作不是必要的）手动添加1没有显示生成错误，但测试失败：

java.lang.RuntimeException: Exception during suite construction 
at android.test.suitebuilder.TestSuiteBuilder$FailedToCreateTests.testSuiteConstructionFailed(TestSuiteBuilder.java:239) 
at java.lang.reflect.Method.invokeNative(Native Method) 
at android.test.AndroidTestRunner.runTest(AndroidTestRunner.java:169) 
at android.test.AndroidTestRunner.runTest(AndroidTestRunner.java:154) 
at android.test.InstrumentationTestRunner.onStart(InstrumentationTestRunner.java:430) 
at android.app.Instrumentation$InstrumentationThread.run(Instrumentation.java:1447) 
Caused by: java.lang.reflect.InvocationTargetException 
at com.r14.error.imp.test.R14ErrorLibImpActivityTest.<init>(R14ErrorLibImpActivityTest.java:10) 
at java.lang.reflect.Constructor.constructNative(Native Method) 
at java.lang.reflect.Constructor.newInstance(Constructor.java:446) 
at android.test.suitebuilder.TestMethod.instantiateTest(TestMethod.java:87) 
at android.test.suitebuilder.TestMethod.createTest(TestMethod.java:73) 
at android.test.suitebuilder.TestSuiteBuilder.addTest(TestSuiteBuilder.java:263) 
at android.test.suitebuilder.TestSuiteBuilder.build(TestSuiteBuilder.java:185) 
at android.test.InstrumentationTestRunner.onCreate(InstrumentationTestRunner.java:336) 
at android.app.ActivityThread.handleBindApplication(ActivityThread.java:3982) 
at android.app.ActivityThread.access$2900(ActivityThread.java:119) 
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1901) 
at android.os.Handler.dispatchMessage(Handler.java:99) 
at android.os.Looper.loop(Looper.java:123) 
at android.app.ActivityThread.main(ActivityThread.java:4363) 
at java.lang.reflect.Method.invokeNative(Native Method) 
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:860) 
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618) 
at dalvik.system.NativeStart.main(Native Method) 
Caused by: java.lang.NoClassDefFoundError: com.r14.error.imp.R14ErrorImpActivity 
... 19 more

我与Eclipse靛蓝和ADT工作15

感谢任何帮助！

来源

2011-11-01 ARNeto

http://kyleclegg.com/eclipse-android-error-type-cannot-be-resolved/ –

@ Dr.nik：感谢您的线索。如果手动添加库（在旧版adt版本中不需要该操作），则不会显示构建类型错误，但测试失败并且添加了该消息以发布。 – ARNeto