Android Studio：添加自定义jar作为依赖项

Question

我将JAR文件粘贴在Android Studio的app/libs文件夹中。

我在Android Studio中将此文件添加为Jar依赖项。

build.gradle文件包含JAR的引用编译文件('libs/my-custom-jar-1.0.0.jar')

dependencies {
    compile files('libs/my-custom-jar-1.0.0.jar')
    compile fileTree(include: ['*.jar'], dir: 'libs')
}

dependencies {
    compile fileTree(dir: 'libs', include: ['*.jar'])
    androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', {
        exclude group: 'com.android.support', module: 'support-annotations'
    })
    androidTestCompile 'com.google.code.findbugs:jsr305:3.0.2'
    compile project(':com.custom.dialog')
    compile project(':zxing_standalone')
    compile 'com.android.support:appcompat-v7:26.0.2'
    compile 'com.android.support.constraint:constraint-layout:1.0.2'
    compile 'com.xxxxxxxx.android:library:1.0.23@aar', { transitive = true }
    compile 'com.google.code.gson:gson:2.2.4'
    compile 'com.squareup.retrofit2:retrofit:2.3.0'
    compile 'com.squareup.retrofit2:converter-scalars:2.1.0'
    compile 'com.squareup.retrofit2:converter-gson:2.3.0'
    compile 'com.squareup.okhttp3:okhttp:3.9.0'
    compile 'com.squareup.okhttp3:logging-interceptor:3.9.0'
    compile 'com.android.support:design:26.0.2'
    compile 'commons-io:commons-io:2.0.1'
    compile 'org.apache.commons:commons-lang3:3.5'
    compile files('libs/my-custom-jar-1.0.0.jar')
}

Answer 1

确保您已经将jar文件复制到项目中，但您引用的是一篇非常老的文章。不需要为jar文件添加额外的行，因为fileTree方法将包含来自libs文件夹的扩展名为.jar的任何内容。

我会将我的依赖项更新为：

dependencies {
     implementation fileTree(dir: 'libs', include: ['*.jar'])
}

然后做一个分级同步，你的文件应该是可用的。

public class MainActivity extends AppCompatActivity {

    PersonDAO personDao;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        personDao = new PersonDAO("John", "Smith", 50);
    }

    public void doSomething(View view){
        Toast.makeText(this, getString(R.string.greeting, personDao.getFirstName()), Toast.LENGTH_SHORT).show();
    }
}