使用场景

一些自定义控件直接copy了Android源码，使用了如下类似特性

希望能够使用系统的attr属性，调用了com.android.internal.R文件

// android.widget.TextView
TypedArray a = theme.obtainStyledAttributes(attrs,
	com.android.internal.R.styleable.TextView,
	defStyleAttr, defStyleRes);
int n = a.getIndexCount();
for (int i = 0; i < n; i++) {
  int attr = a.getIndex(i);
  switch (attr) {
    case com.android.internal.R.styleable.TextView_text:
      mText = a.getText(attr);
      break;
    case com.android.internal.R.styleable.TextView_textColor:
      mTextColor = a.getColorStateList(attr);
      break;
  }
}

调用了@hide Api

// android.text.StaticLayout
/**
 * @hide
 * @deprecated Use {@link Builder} instead.
 */
@Deprecated
public StaticLayout(...) {}

会导致编译失败，需要使用 android-hidden-api 解决此问题

解决方式

下载 android_hide_api.jar，添加到libs目录

module的build.gradle添加依赖

dependencies {
    provided files('libs/android_hide_api.jar')
    ...
}

项目根build.gradle添加依赖

allprojects {
    gradle.projectsEvaluated {
        tasks.withType(JavaCompile) {
            // Xbootclasspath/p:是 Java 编译的寻址优先设置，先找缺省路径还是全路径
            options.compilerArgs.add("-Xbootclasspath/p:${rootProject.projectDir}/app/libs/android_hide_api.jar")
        }
    }
    ...
}

其他

网上有一些方案将 /.idea/modules/app/xxx.app.iml 里面 jdk orderEntry 顺序调后

<orderEntry type="jdk" jdkName="Android API 28 Platform" jdkType="Android SDK" />
<orderEntry type="sourceFolder" forTests="false" />
<orderEntry type="library" name="Gradle: ./app/libs/android_hide_api.jar" level="project" />
<orderEntry type="library" name="Gradle: com.android.support:collections:28.0.0" level="project" />
<orderEntry type="library" name="Gradle: android.arch.lifecycle:common:1.1.1" level="project" />
<orderEntry type="library" name="Gradle: android.arch.core:common:1.1.1" level="project" />
<orderEntry type="library" name="Gradle: com.android.support:support-annotations:28.0.0" level="project" />

通过在preBuild task执行之后，进行文件修改

preBuild {
    doLast {
        def imlFile = new File("${rootProject.projectDir}/.idea/modules/${project.name}/${rootProject.name}.${project.name}.iml")
        try {
            if (imlFile.exists()) {
                def parsedXml = (new XmlParser()).parse(imlFile)
                def jdkNode = parsedXml.component[1].orderEntry.find { it.'@type' == 'jdk' }
                parsedXml.component[1].remove(jdkNode)
                def sdkString = "Android API " + android.compileSdkVersion.substring("android-".length()) + " Platform"
                new groovy.util.Node(parsedXml.component[1], 'orderEntry', ['type': 'jdk', 'jdkName': sdkString, 'jdkType': 'Android SDK'])
                groovy.xml.XmlUtil.serialize(parsedXml, new FileOutputStream(imlFile))
            }
        } catch (FileNotFoundException e) {
            // nop, iml not found
        }
    }
}