小编kid*_*her的帖子

在多项目gradle构建中,有人可以告诉我"allprojects"部分和"buildscript"部分之间究竟有什么区别？两者有一个repositories和dependencies任务.是allprojects为了我的项目？怎么样buildscript？

buildscript {  
     repositories {
         ...
     }
     dependencies {
         ...
     }
}

和

allprojects(subprojects) { 
     repositories {
         ...
     }
     dependencies {
         ...
     }
}

我正在android平台上学习multiDex.这是https://developer.android.com/tools/building/multidex.html#mdex-gradle.当我使用multiDex支持库时,输出apk将包含多个dex文件,如class.dex,class1.dex,class2.dex.然后我编写一个名为myApplicationinherited from 的类Application并覆盖api attachBaseContext.在方法中,我MultiDex.install()按照推荐的方式调用.

我的问题是,如果我用了会发生什么MultiDex.install()的onCreate？

我知道attachBaseContext之前有人打过电话onCreate,所以打电话attachBaseContext更好.很明显,我想知道为什么这里推荐它？ClassNotFoundException当我在onCreate中调用它时,是否会抛出这种情况？

我正在研究Robolectric.

我的项目目录是,

我的单元测试代码MainActivityTest如下,

package com.example.activity;

import android.app.Activity;

import com.example.BuildConfig;

import org.junit.Test;
import org.junit.runner.RunWith;
import org.robolectric.Robolectric;
import org.robolectric.RobolectricGradleTestRunner;
import org.robolectric.annotation.Config;

import static org.junit.Assert.assertTrue;

@RunWith(RobolectricGradleTestRunner.class)
@Config(constants = BuildConfig.class)
public class MainActivityTest {

  @Test
  public void titleIsCorrect() throws Exception {
    Activity activity = Robolectric.setupActivity(MainActivity.class);
    assertTrue(activity.getTitle().toString().equals("Deckard"));
  }
}

配置是,

当我运行测试代码时

它出错了,

/Library/Java/JavaVirtualMachines/jdk1.8.0_40.jdk/Contents/Home/bin/java -agentlib:jdwp=transport=dt_socket,address=127.0.0.1:51663,suspend=y,server=n -ea -javaagent:/Users/liren/Library/Caches/AndroidStudio1.2/groovyHotSwap/gragent.jar -Dfile.encoding=UTF-8 -classpath "/Applications/Android Studio 2.app/Contents/lib/idea_rt.jar:/Applications/Android Studio 2.app/Contents/plugins/junit/lib/junit-rt.jar:/Users/liren/Library/Android/sdk/platforms/android-19/data/res:/Users/liren/code/robolectric/RobolectricGo/android-api-19/build/intermediates/classes/test/debug:/Users/liren/code/robolectric/RobolectricGo/android-api-19/build/intermediates/classes/debug:/Users/liren/kit/gradle-2.4/caches/modules-2/files-2.1/org.apache.maven/maven-ant-tasks/2.1.3/b09be554228d66d208e5fef5266844aacf443abc/maven-ant-tasks-2.1.3.jar:/Users/liren/kit/gradle-2.4/caches/modules-2/files-2.1/org.apache.ant/ant/1.8.0/7b456ca6b93900f96e58cc8371f03d90a9c1c8d1/ant-1.8.0.jar:/Users/liren/kit/gradle-2.4/caches/modules-2/files-2.1/org.assertj/assertj-core/1.7.0/c0451c7fce61d14f9f0fa84bb2760e548221e471/assertj-core-1.7.0.jar:/Users/liren/.m2/repository/com/ibm/icu/icu4j/53.1/icu4j-53.1.jar:/Users/liren/.m2/repository/com/google/android/apps/common/testing/accessibility/framework/accessibility-test-framework/1.0/accessibility-test-framework-1.0.jar:/Users/liren/kit/gradle-2.4/caches/modules-2/files-2.1/org.robolectric/robolectric-annotations/3.0-SNAPSHOT/4e48c5059ce3fae922863f3464fa05ce6a5e08d6/robolectric-annotations-3.0-SNAPSHOT.jar:/Users/liren/kit/gradle-2.4/caches/modules-2/files-2.1/org.apache.ant/ant-launcher/1.8.0/8b53ba16fa62fb1034da8f1de200ddc407c8381/ant-launcher-1.8.0.jar:/Users/liren/kit/gradle-2.4/caches/modules-2/files-2.1/org.ow2.asm/asm-commons/5.0.1/7b7147a390a93a14d2edfdcf3f7b0e87a0939c3e/asm-commons-5.0.1.jar:/Users/liren/.m2/repository/com/almworks/sqlite4java/sqlite4java/0.282/sqlite4java-0.282.jar:/Users/liren/kit/gradle-2.4/caches/modules-2/files-2.1/org.ow2.asm/asm-tree/5.0.1/1b1e6e9d869acd704056d0a4223071a511c619e6/asm-tree-5.0.1.jar:/Users/liren/kit/gradle-2.4/caches/modules-2/files-2.1/org.ow2.asm/asm/5.0.1/2fd56467a018aafe6ec6a73ccba520be4a7e1565/asm-5.0.1.jar:/Users/liren/kit/gradle-2.4/caches/modules-2/files-2.1/org.ow2.asm/asm-analysis/5.0.1/e286fbee48efacb4e7c175f7948d9d8b2ab52352/asm-analysis-5.0.1.jar:/Users/liren/kit/gradle-2.4/caches/modules-2/files-2.1/org.robolectric/robolectric/3.0-SNAPSHOT/fde4745244f1447557b2f55030cb4fc546b53fac/robolectric-3.0-SNAPSHOT.jar:/Users/liren/.m2/repository/com/ximpleware/vtd-xml/2.11/vtd-xml-2.11.jar:/Users/liren/kit/gradle-2.4/caches/modules-2/files-2.1/org.ow2.asm/asm-util/5.0.1/7c8caddfbd0b2d7b844f8fcc75175b9cb9cf4724/asm-util-5.0.1.jar:/Users/liren/kit/gradle-2.4/caches/modules-2/files-2.1/org.hamcrest/hamcrest-core/1.1/860340562250678d1a344907ac75754e259cdb14/hamcrest-core-1.1.jar:/Users/liren/kit/gradle-2.4/caches/modules-2/files-2.1/org.bouncycastle/bcprov-jdk16/1.46/ce091790943599535cbb4de8ede84535b0c1260c/bcprov-jdk16-1.46.jar:/Users/liren/kit/gradle-2.4/caches/modules-2/files-2.1/org.robolectric/robolectric-utils/3.0-SNAPSHOT/bf446c7a07ee47a454c8db9ad10c1a8ca2515fd9/robolectric-utils-3.0-SNAPSHOT.jar:/Users/liren/kit/gradle-2.4/caches/modules-2/files-2.1/junit/junit/4.10/e4f1766ce7404a08f45d859fb9c226fc9e41a861/junit-4.10.jar:/Users/liren/kit/gradle-2.4/caches/modules-2/files-2.1/org.robolectric/robolectric-resources/3.0-SNAPSHOT/ee905e9f06d0056f8d165a9a8ba24864825baa64/robolectric-resources-3.0-SNAPSHOT.jar:/Users/liren/kit/gradle-2.4/caches/modules-2/files-2.1/org.robolectric/shadows-core/3.0-SNAPSHOT/419067a26312d0bd71b00d81fa4bc501f7ccdabd/shadows-core-3.0-SNAPSHOT.jar:/Users/liren/code/robolectric/RobolectricGo/android-api-19/build/intermediates/mockable-android-19.jar" com.intellij.rt.execution.junit.JUnitStarter -ideVersion5 com.example.activity.MainActivityTest
objc[13827]: Class JavaLaunchHelper is implemented in both /Library/Java/JavaVirtualMachines/jdk1.8.0_40.jdk/Contents/Home/bin/java and /Library/Java/JavaVirtualMachines/jdk1.8.0_40.jdk/Contents/Home/jre/lib/libinstrument.dylib. One of the two will …

我正在Android Studio中学习该工具，获取线程转储，如下所示：

我注意到每个线程的状态都不同，

我可以看到有runnable，sleeping，waiting。我深入线程堆栈，大多数这样的线程堆栈，

"<61> RxComputationScheduler-3@830064517520" daemon prio=5 waiting
    java.lang.Thread.State: WAITING
        at java.lang.Object.wait(Object.java:-1)
        at java.lang.Thread.parkFor(Thread.java:1205)
        at sun.misc.Unsafe.park(Unsafe.java:325)
        at java.util.concurrent.locks.LockSupport.park(LockSupport.java:157)
        at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2017)
        at java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:1050)
        at java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:778)
        at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1035)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1097)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
        at java.lang.Thread.run(Thread.java:841)

我很困惑，他们这样做都停止Object.wait，但线程的状态可以是runnable，sleeping，waiting？

这是另一个状态线程的堆栈。

RUNNABLE

<53> RxSchedulerPurge-1@830057651944" daemon prio=5 runnable
  java.lang.Thread.State: RUNNABLE
      at java.lang.Object.wait(Object.java:-1)
      at java.lang.Thread.parkFor(Thread.java:1205)
      at sun.misc.Unsafe.park(Unsafe.java:325)
      at java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:197)
      at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(AbstractQueuedSynchronizer.java:2056)
      at java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:1062)
      at java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:778)
      at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1035)
      at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1097)
      at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
      at java.lang.Thread.run(Thread.java:841)</code>

TIMED_WAITING …