ClassNotFoundException in apk build with maven

Question

我想在Android开发中切换到maven进行构建过程。我按照 http://www.sonatype.com/books/mvnref-book/reference/android-dev-sect-archetype.html 创建了pom.xml并稍微调整了版本，以便我使用的是最新版本的android-maven-plugin。

虽然我的apk从我的IDE（IntellJ）中手动构建良好，但使用maven构建的apk存在问题。显然缺少一些东西，无法将类放入 apk。

当我检查两个生成的apk（

解压缩它）时，我发现maven生成的apk的classes.dex比常规的apk（24.9kB）小得多（2.6kB）。显然那里缺少类。

因此，启动此apk时，我收到以下错误：

E/AndroidRuntime(31228): FATAL EXCEPTION: main
E/AndroidRuntime(31228): java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.mycompany.abc/com.mycompany.abc.ABCActivity}: java.lang.ClassNotFoundException: com.mycompany.abc.ABCActivity in loader dalvik.system.PathClassLoader[/mnt/asec/com.mycompany.abc-1/pkg.apk]
E/AndroidRuntime(31228):    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1569)
E/AndroidRuntime(31228):    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1663)
E/AndroidRuntime(31228):    at android.app.ActivityThread.access$1500(ActivityThread.java:117)
E/AndroidRuntime(31228):    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:931)
E/AndroidRuntime(31228):    at android.os.Handler.dispatchMessage(Handler.java:99)
E/AndroidRuntime(31228):    at android.os.Looper.loop(Looper.java:130)
E/AndroidRuntime(31228):    at android.app.ActivityThread.main(ActivityThread.java:3683)
E/AndroidRuntime(31228):    at java.lang.reflect.Method.invokeNative(Native Method)
E/AndroidRuntime(31228):    at java.lang.reflect.Method.invoke(Method.java:507)
E/AndroidRuntime(31228):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
E/AndroidRuntime(31228):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
E/AndroidRuntime(31228):    at dalvik.system.NativeStart.main(Native Method)
E/AndroidRuntime(31228): Caused by: java.lang.ClassNotFoundException: com.mycompany.abc.ABCActivity in loader dalvik.system.PathClassLoader[/mnt/asec/com.mycompany.abc-1/pkg.apk]
E/AndroidRuntime(31228):    at dalvik.system.PathClassLoader.findClass(PathClassLoader.java:240)
E/AndroidRuntime(31228):    at java.lang.ClassLoader.loadClass(ClassLoader.java:551)
E/AndroidRuntime(31228):    at java.lang.ClassLoader.loadClass(ClassLoader.java:511)
E/AndroidRuntime(31228):    at android.app.Instrumentation.newActivity(Instrumentation.java:1021)
E/AndroidRuntime(31228):    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1561)
E/AndroidRuntime(31228):    ... 11 more
W/ActivityManager( 4964):   Force finishing activity com.mycompany.abc/.ABCActivity
W/ActivityManager( 4964): Activity pause timeout for HistoryRecord{40902960 com.mycompany.abc/.ABCActivity}

这是我的绒球.xml，我使用：mvn install -P sign或mvn android:apk

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <groupId>com.mycompany</groupId>
  <artifactId>com.mycompany.abc</artifactId>
  <version>1.0-SNAPSHOT</version>
  <packaging>apk</packaging>
  <name>com.mycompany.abc</name>
    <dependencies>
        <dependency>
            <groupId>com.google.android</groupId>
            <artifactId>android</artifactId>
            <version>2.2.1</version>
            <scope>provided</scope>
        </dependency>
    </dependencies>
    <build>
        <plugins>
            <plugin>
                <!-- Simply read properties from file -->
                <groupId>org.codehaus.mojo</groupId>
                <artifactId>properties-maven-plugin</artifactId>
                <version>1.0-alpha-2</version>
                <executions>
                    <execution>
                        <phase>initialize</phase>
                        <goals>
                            <goal>read-project-properties</goal>
                        </goals>
                        <configuration>
                            <files>
                                <file>android.properties</file>
                            </files>
                        </configuration>
                    </execution>
                </executions>
            </plugin>
            <plugin>
                <groupId>com.jayway.maven.plugins.android.generation2</groupId>
                <artifactId>android-maven-plugin</artifactId>
                <version>3.2.0</version>
                <configuration>
                    <androidManifestFile>${project.basedir}/AndroidManifest.xml</androidManifestFile>
                    <assetsDirectory>${project.basedir}/assets</assetsDirectory>
                    <resourceDirectory>${project.basedir}/res</resourceDirectory>
                    <nativeLibrariesDirectory>${project.basedir}/src/main/native</nativeLibrariesDirectory>
                    <sdk>
                        <platform>11</platform>
                    </sdk>
                    <deleteConflictingFiles>true</deleteConflictingFiles>
                    <undeployBeforeDeploy>true</undeployBeforeDeploy>
                    <device>usb</device>
                </configuration>
                <extensions>true</extensions>
            </plugin>
            <plugin>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>2.3.2</version>
                <configuration>
                    <source>1.6</source>
                    <target>1.6</target>
                </configuration>
            </plugin>
            <plugin>
                <artifactId>exec-maven-plugin</artifactId>
                <groupId>org.codehaus.mojo</groupId>
                <configuration>
                    <executable>${basedir}/scripts/run_app.sh</executable>
                </configuration>
            </plugin>
        </plugins>
    </build>
    <profiles>
        <profile>
            <id>sign</id>
            <build>
                <plugins>
                    <plugin>
                        <groupId>org.apache.maven.plugins</groupId>
                        <artifactId>maven-jarsigner-plugin</artifactId>
                        <version>1.2</version>
                        <executions>
                            <execution>
                                <id>signing</id>
                                <goals>
                                    <goal>sign</goal>
                                </goals>
                                <phase>package</phase>
                                <inherited>true</inherited>
                                <configuration>
                                    <archiveDirectory></archiveDirectory>
                                    <includes>
                                        <include>target/*.apk</include>
                                    </includes>
                                    <keystore>/path/to/debug.keystore</keystore>
                                    <storepass>android</storepass>
                                    <keypass>android</keypass>
                                    <alias>androiddebugkey</alias>
                                    <arguments>
                                        <argument>-sigalg</argument><argument>MD5withRSA</argument>
                                        <argument>-digestalg</argument><argument>SHA1</argument>
                                    </arguments>
                                </configuration>
                            </execution>
                        </executions>
                    </plugin>
                    <plugin>
                        <groupId>com.jayway.maven.plugins.android.generation2</groupId>
                        <artifactId>android-maven-plugin</artifactId>
                        <inherited>true</inherited>
                        <configuration>
                            <sign>
                                <debug>false</debug>
                            </sign>
                        </configuration>
                    </plugin>
                </plugins>
            </build>
        </profile>
    </profiles>
</project>

Answer 1

发现问题：

<sourceDirectory>src</sourceDirectory>

在build部分中缺失。想知道为什么Android原型（运行时archetype:generate）还没有包括它，因为它在Android中是非常标准的。