只需使用Android Studio 2.2.3和Java 1.8和Android 7(API Level 24)设置项目,试图测试“新”java 8功能Stream
。如何在Android 6.0下使用Java 8 Stream API
这里我gradle这个文件:
apply plugin: 'com.android.application'
android {
compileSdkVersion 25
buildToolsVersion "25.0.2"
defaultConfig {
applicationId "com.example.radinator.myproject"
minSdkVersion 24
targetSdkVersion 24
versionCode 1
versionName "1.0"
testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
}
}
}
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'
})
compile 'com.android.support:appcompat-v7:25.2.0'
testCompile 'junit:junit:4.12'
}
下面的代码:
import java.util.stream.*;
public class MainActivity extens Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_mainactivity);
}
void foo(){
List<String> myList = Arrays.asList("one", "two", "three", "four", "five", "six");
myList.stream()
.filter(s -> s.length() > 0)
.collect(Collectors.toList())
}
}
Android Studio中强调了线myList.stream()...
告诉我 “Usage of API documented as @since 1.8+
” 摇篮正在编制的一切,但为什么我得到这个消息?我认为这个特性是在Java 8中引入的,并且可以在Android API Level 24和更高版本中获得?
我该如何解决这个烂摊子?
在此先感谢
也许这可能有助于(设置模块lang级别):http://stackoverflow.com/questions/37787079/intellij-unable-to-use-newer-java-8-classes-error-usage-of-api - 如果安卓工作室有这个选项我已经改变它的文档 – Kelo
。可悲的是没有这样的选择(只编译sdk版本和构建工具版本) – Radinator
API等级24 =牛轧糖,Android 7.0-7。1.1,API Level 23 = Marshmallow,Android 6.0(.1) – Sartorius