深海游弋的鱼 – 默默的点滴

Android真机使用Mockito-1.10.19+Dexmaker-1.2在Mock仅包内可见类时报告错误“java.lang.UnsupportedOperationException: cannot proxy inaccessible class ***”

Android真机使用Mockito-1.10.19+Dexmaker-1.2在Mock仅包内可见类时报告如下错误：

java.lang.UnsupportedOperationException: cannot proxy inaccessible class class com.yunos.tv.shake.biz.PackageAccessible
at com.android.dx.stock.ProxyBuilder.buildProxyClass(ProxyBuilder.java:269)
at com.android.dx.mockito.DexmakerMockMaker.createMock(DexmakerMockMaker.java:56)
at org.mockito.internal.util.MockUtil.createMock(MockUtil.java:33)
at org.mockito.internal.MockitoCore.mock(MockitoCore.java:59)
at org.mockito.Mockito.mock(Mockito.java:1285)
at org.mockito.Mockito.mock(Mockito.java:1163)
at com.yunos.tv.shake.biz.PackageAccessibleTest.setUp(PackageAccessibleTest.java:17)
at android.test.AndroidTestRunner.runTest(AndroidTestRunner.java:191)
at android.test.AndroidTestRunner.runTest(AndroidTestRunner.java:176)
at android.test.InstrumentationTestRunner.onStart(InstrumentationTestRunner.java:555)
at android.app.Instrumentation$InstrumentationThread.run(Instrumentation.java:1853)
Caused by: java.lang.IllegalAccessError: Class com.yunos.tv.shake.biz.PackageAccessible extended by class PackageAccessible_Proxy is inaccessible (declaration of 'PackageAccessible_Proxy' appears in /data/data/com.yunos.tv.shake.biz.test/cache/Generated_179875952.jar)
at dalvik.system.DexFile.defineClassNative(Native Method)
at dalvik.system.DexFile.defineClass(DexFile.java:226)
at dalvik.system.DexFile.loadClassBinaryName(DexFile.java:219)
at dalvik.system.DexPathList.findClass(DexPathList.java:321)
at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:54)
at java.lang.ClassLoader.loadClass(ClassLoader.java:511)
at java.lang.ClassLoader.loadClass(ClassLoader.java:469)
at com.android.dx.stock.ProxyBuilder.loadClass(ProxyBuilder.java:284)
at com.android.dx.stock.ProxyBuilder.buildProxyClass(ProxyBuilder.java:266)
... 15 more

java.lang.UnsupportedOperationException: cannot proxy inaccessible class class com.yunos.tv.shake.biz.PackageAccessible

at com.android.dx.stock.ProxyBuilder.buildProxyClass(ProxyBuilder.java:269)

at com.android.dx.mockito.DexmakerMockMaker.createMock(DexmakerMockMaker.java:56)

at org.mockito.internal.util.MockUtil.createMock(MockUtil.java:33)

at org.mockito.internal.MockitoCore.mock(MockitoCore.java:59)

at org.mockito.Mockito.mock(Mockito.java:1285)

at org.mockito.Mockito.mock(Mockito.java:1163)

at com.yunos.tv.shake.biz.PackageAccessibleTest.setUp(PackageAccessibleTest.java:17)

at android.test.AndroidTestRunner.runTest(AndroidTestRunner.java:191)

at android.test.AndroidTestRunner.runTest(AndroidTestRunner.java:176)

at android.test.InstrumentationTestRunner.onStart(InstrumentationTestRunner.java:555)

at android.app.Instrumentation$InstrumentationThread.run(Instrumentation.java:1853)

Caused by: java.lang.IllegalAccessError: Class com.yunos.tv.shake.biz.PackageAccessible extended by class PackageAccessible_Proxy is inaccessible (declaration of 'PackageAccessible_Proxy' appears in /data/data/com.yunos.tv.shake.biz.test/cache/Generated_179875952.jar)

at dalvik.system.DexFile.defineClassNative(Native Method)

at dalvik.system.DexFile.defineClass(DexFile.java:226)

at dalvik.system.DexFile.loadClassBinaryName(DexFile.java:219)

at dalvik.system.DexPathList.findClass(DexPathList.java:321)

at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:54)

at java.lang.ClassLoader.loadClass(ClassLoader.java:511)

at java.lang.ClassLoader.loadClass(ClassLoader.java:469)

at com.android.dx.stock.ProxyBuilder.loadClass(ProxyBuilder.java:284)

at com.android.dx.stock.ProxyBuilder.buildProxyClass(ProxyBuilder.java:266)

... 15 more

被测试类代码如下:

package com.yunos.tv.shake.biz;

class PackageAccessible {
}

package com.yunos.tv.shake.biz;

class PackageAccessible {

}

注意上述被测试类前面没有声明public，因此默认是default访问，也就是包内可见。我们下面的测试代码跟被测试类属于同一个包名package com.yunos.tv.shake.biz，因此，按理说，是可以正常访问的。
测试类的代码如下：

package com.yunos.tv.shake.biz;

import android.test.AndroidTestCase;

import org.mockito.Mockito;

public class PackageAccessibleTest extends AndroidTestCase {
    protected void setUp() throws Exception {
        super.setUp();
        /*解决BUG dexcache == null (and no default could be found; consider setting the 'dexmaker.dexcache' system pr*/
        System.setProperty(
                "dexmaker.dexcache",
                getContext().getCacheDir().getPath());
        PackageAccessible packageAccessible = Mockito.mock(PackageAccessible.class);
    }
}

package com.yunos.tv.shake.biz;

import android.test.AndroidTestCase;

import org.mockito.Mockito;

public class PackageAccessibleTest extends AndroidTestCase {

protected void setUp() throws Exception {

super.setUp();

/*解决BUG dexcache == null (and no default could be found; consider setting the 'dexmaker.dexcache' system pr*/

System.setProperty(

"dexmaker.dexcache",

getContext().getCacheDir().getPath());

PackageAccessible packageAccessible = Mockito.mock(PackageAccessible.class);

}

这个问题只在ART虚拟机下面发生异常，相同的代码在Dalvik下面是完全正常的。
问题发生的原因暂时还不能确定，应该是ART虚拟机实现功能的时候的不兼容导致的。
解决方法为在测试代码中声明一个继承被测试类的子类，并且把子类声明成public。
如下：

package com.yunos.tv.shake.biz;

public class PackageAccessibleShadow extends PackageAccessible {
}

package com.yunos.tv.shake.biz;

public class PackageAccessibleShadow extends PackageAccessible {

}

修改后的测试代码如下：

package com.yunos.tv.shake.biz;

import android.test.AndroidTestCase;

import org.mockito.Mockito;

public class PackageAccessibleTest extends AndroidTestCase {
    protected void setUp() throws Exception {
        super.setUp();
        /*解决BUG dexcache == null (and no default could be found; consider setting the 'dexmaker.dexcache' system pr*/
        System.setProperty(
                "dexmaker.dexcache",
                getContext().getCacheDir().getPath());
        PackageAccessibleShadow packageAccessible = Mockito.mock(PackageAccessibleShadow.class);
    }
}

package com.yunos.tv.shake.biz;

import android.test.AndroidTestCase;

import org.mockito.Mockito;

public class PackageAccessibleTest extends AndroidTestCase {

protected void setUp() throws Exception {

super.setUp();

/*解决BUG dexcache == null (and no default could be found; consider setting the 'dexmaker.dexcache' system pr*/

System.setProperty(

"dexmaker.dexcache",

getContext().getCacheDir().getPath());

PackageAccessibleShadow packageAccessible = Mockito.mock(PackageAccessibleShadow.class);

}

即可解决上述问题。

Android ContentProvider使用时出现的错误“java.lang.SecurityException: Permission Denial: opening provider ***”

Android的APK上自定义了一个ContentProvider，但是在调用者使用时出现的错误"java.lang.SecurityException: Permission Denial: opening provider ***"。

查询了半天才发现是由于在声明ContentProvider的时候没有声明android:exported="true"导致的。

从目前的测试情况来看，跟Android的版本有关系，目前看到在低版本的Android系统上面，这个如果不设置，默认是自动导出的，但是在高版本的Android上面，默认就是不导出了，这就导致一个问题，就是相同的APK在不同系统上面会出现不同的行为。因此要求必须显示指定这个字段。

注意如下说明：

android:exported
Whether the content provider is available for other applications to use:
true: The provider is available to other applications. Any application can use the provider's content URI to access it, subject to the permissions specified for the provider.
false: The provider is not available to other applications. Set android:exported="false" to limit access to the provider to your applications. Only applications that have the same user ID (UID) as the provider will have access to it.
The default value is "true" for applications that set either android:minSdkVersion or android:targetSdkVersion to "16" or lower. For applications that set either of these attributes to "17" or higher, the default is "false".
 
You can set android:exported="false" and still limit access to your provider by setting permissions with the permission attribute.

android:exported

Whether the content provider is available for other applications to use:

true: The provider is available to other applications. Any application can use the provider's content URI to access it, subject to the permissions specified for the provider.

false: The provider is not available to other applications. Set android:exported="false" to limit access to the provider to your applications. Only applications that have the same user ID (UID) as the provider will have access to it.

The default value is "true" for applications that set either android:minSdkVersion or android:targetSdkVersion to "16" or lower. For applications that set either of these attributes to "17" or higher, the default is "false".

You can set android:exported="false" and still limit access to your provider by setting permissions with the permission attribute.

参考链接

Android真机使用Mockito-1.10.19+Dexmaker-1.2在Mock继承抽象父类的子类时报告错误“java.lang.AbstractMethodError: abstract method not implemented”

Android真机使用Mockito-1.10.19+Dexmaker-1.2在Mock继承抽象父类的子类时报告如下错误：

java.lang.AbstractMethodError: abstract method not implemented
at org.mockito.internal.invocation.AbstractAwareMethod.isAbstract(Native Method)
at org.mockito.internal.invocation.InvocationImpl.callRealMethod(InvocationImpl.java:109)
at org.mockito.internal.stubbing.answers.CallsRealMethods.answer(CallsRealMethods.java:41)
at org.mockito.internal.stubbing.StubbedInvocationMatcher.answer(StubbedInvocationMatcher.java:34)
at org.mockito.internal.handler.MockHandlerImpl.handle(MockHandlerImpl.java:91)
at org.mockito.internal.handler.NullResultGuardian.handle(NullResultGuardian.java:29)
at org.mockito.internal.handler.InvocationNotifierHandler.handle(InvocationNotifierHandler.java:38)
at com.google.dexmaker.mockito.InvocationHandlerAdapter.invoke(InvocationHandlerAdapter.java:49)
at ChildCls_Proxy.forParentMock(ChildCls_Proxy.generated)
at com.yunos.tv.shake.biz.DiTingMessageProviderTest.setUp(childClsTest.java:33)
at android.test.AndroidTestRunner.runTest(AndroidTestRunner.java:203)
at android.test.AndroidTestRunner.runTest(AndroidTestRunner.java:177)
at android.test.InstrumentationTestRunner.onStart(InstrumentationTestRunner.java:554)
at android.app.Instrumentation$InstrumentationThread.run(Instrumentation.java:1727)

java.lang.AbstractMethodError: abstract method not implemented

at org.mockito.internal.invocation.AbstractAwareMethod.isAbstract(Native Method)

at org.mockito.internal.invocation.InvocationImpl.callRealMethod(InvocationImpl.java:109)

at org.mockito.internal.stubbing.answers.CallsRealMethods.answer(CallsRealMethods.java:41)

at org.mockito.internal.stubbing.StubbedInvocationMatcher.answer(StubbedInvocationMatcher.java:34)

at org.mockito.internal.handler.MockHandlerImpl.handle(MockHandlerImpl.java:91)

at org.mockito.internal.handler.NullResultGuardian.handle(NullResultGuardian.java:29)

at org.mockito.internal.handler.InvocationNotifierHandler.handle(InvocationNotifierHandler.java:38)

at com.google.dexmaker.mockito.InvocationHandlerAdapter.invoke(InvocationHandlerAdapter.java:49)

at ChildCls_Proxy.forParentMock(ChildCls_Proxy.generated)

at com.yunos.tv.shake.biz.DiTingMessageProviderTest.setUp(childClsTest.java:33)

at android.test.AndroidTestRunner.runTest(AndroidTestRunner.java:203)

at android.test.AndroidTestRunner.runTest(AndroidTestRunner.java:177)

at android.test.InstrumentationTestRunner.onStart(InstrumentationTestRunner.java:554)

at android.app.Instrumentation$InstrumentationThread.run(Instrumentation.java:1727)

父类代码如下:

abstract public class ParentCls {
    abstract public void forChildMock();
}

abstract public class ParentCls {

abstract public void forChildMock();

}

子类代码如下：

public class ChildCls extends ParentCls{

    @Override
    public void forChildMock() {

    }
}

public class ChildCls extends ParentCls{

@Override

public void forChildMock() {

}

测试代码如下：

public class childClsTest extends AndroidTestCase {

    @Override
    protected void setUp() throws Exception {
        super.setUp();
        /*解决BUG dexcache == null (and no default could be found; consider setting the 'dexmaker.dexcache' system pr*/
        System.setProperty(
                "dexmaker.dexcache",
                getContext().getCacheDir().getPath());
        ChildCls childCls = Mockito.mock(ChildCls.class);
        Mockito.doCallRealMethod().when(childCls).forParentMock();
        childCls.forParentMock();
    }
}

public class childClsTest extends AndroidTestCase {

@Override

protected void setUp() throws Exception {

super.setUp();

/*解决BUG dexcache == null (and no default could be found; consider setting the 'dexmaker.dexcache' system pr*/

System.setProperty(

"dexmaker.dexcache",

getContext().getCacheDir().getPath());

ChildCls childCls = Mockito.mock(ChildCls.class);

Mockito.doCallRealMethod().when(childCls).forParentMock();

childCls.forParentMock();

}

在项目的build.gradle中的声明如下：

//for mockito
androidTestCompile 'org.mockito:mockito-core:1.10.19'
androidTestCompile 'com.google.dexmaker:dexmaker:1.2'
androidTestCompile 'com.google.dexmaker:dexmaker-mockito:1.2'

//for mockito

androidTestCompile 'org.mockito:mockito-core:1.10.19'

androidTestCompile 'com.google.dexmaker:dexmaker:1.2'

androidTestCompile 'com.google.dexmaker:dexmaker-mockito:1.2'

这个问题只在Dalvik虚拟机下面发生异常，相同的代码在ART下面是完全正常的。
导致问题发生的原因是Google提供的dexmaker库存在BUG导致的，而这个库，从Maven Center上看，自从2012年开始就没有提供过任何的更新了。
解决方法是不使用Google提供的dexmaker，而是使用com.crittercism.dexmaker修正过这个BUG的版本。

//for mockito
androidTestCompile 'org.mockito:mockito-core:1.10.19'
androidTestCompile 'com.crittercism.dexmaker:dexmaker:1.4'
androidTestCompile "com.crittercism.dexmaker:dexmaker-dx:1.4"
androidTestCompile 'com.crittercism.dexmaker:dexmaker-mockito:1.4'

//for mockito

androidTestCompile 'org.mockito:mockito-core:1.10.19'

androidTestCompile 'com.crittercism.dexmaker:dexmaker:1.4'

androidTestCompile "com.crittercism.dexmaker:dexmaker-dx:1.4"

androidTestCompile 'com.crittercism.dexmaker:dexmaker-mockito:1.4'

com.crittercism.dexmaker项目的GitHub地址是https://github.com/crittercism/dexmaker

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