无法解析符号“FragmentActivity”
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【中文标题】无法解析符号“FragmentActivity”【英文标题】:Cannot resolve symbol "FragmentActivity" 【发布时间】:2017-07-09 04:24:35 【问题描述】:我对 FragmentActivity 类有疑问 当我导入包时:
import android.support.v4.app.FragmentActivity;
当我把它放在代码中时,导入 FragmentActivity 是红色的,Android dtudio 说无法解析符号,我已经尝试了上一页中的所有解决方案。 *** 和其他网站上的类似主题,但错误仍在代码中
我更新了 support-v4 和 gradle 版本,我的 sdk 是最新的 谢谢和再见:D
安卓毕业:
configurations
all*.exclude group: 'com.android.support', module: 'support-v4'
android
signingConfigs
CirclePong
keyAlias 'madtriangle'
keyPassword 'piratamenu94'
storeFile file('/Users/ManuGil/Documents/LibGDX/apk/CirclePong/circlepong.jks')
storePassword 'piratamenu94'
buildToolsVersion "21.1.2"
compileSdkVersion 25
sourceSets
main
manifest.srcFile 'AndroidManifest.xml'
java.srcDirs = ['src']
aidl.srcDirs = ['src']
renderscript.srcDirs = ['src']
res.srcDirs = ['res']
jniLibs.srcDir new File(buildDir, 'lib')
assets.srcDirs = ['assets']
instrumentTest.setRoot('tests')
defaultConfig
minSdkVersion 14
productFlavors
/*
// needed to add JNI shared libraries to APK when compiling on CLI
tasks.withType(com.android.build.gradle.tasks.PackageApplication) pkgTask ->
pkgTask.jniFolders = new HashSet<File>()
pkgTask.jniFolders.add(new File(projectDir, 'libs'))
*/
// called every time gradle gets executed, takes the native dependencies of
// the natives configuration, and extracts them to the proper libs/ folders
// so they get packed with the APK.
task copyAndroidNatives()
file("libs/armeabi/").mkdirs();
file("libs/armeabi-v7a/").mkdirs();
file("libs/x86/").mkdirs();
configurations.natives.files.each jar ->
def outputDir = null
if (jar.name.endsWith("natives-armeabi-v7a.jar")) outputDir = file("libs/armeabi-v7a")
if (jar.name.endsWith("natives-armeabi.jar")) outputDir = file("libs/armeabi")
if (jar.name.endsWith("natives-x86.jar")) outputDir = file("libs/x86")
if (outputDir != null)
copy
from zipTree(jar)
into outputDir
include "*.so"
task run(type: Exec)
def path
def localProperties = project.file("../local.properties")
if (localProperties.exists())
Properties properties = new Properties()
localProperties.withInputStream instr ->
properties.load(instr)
def sdkDir = properties.getProperty('sdk.dir')
if (sdkDir)
path = sdkDir
else
path = "$System.env.ANDROID_HOME"
else
path = "$System.env.ANDROID_HOME"
def adb = path + "/platform-tools/adb"
commandLine "$adb", 'shell', 'am', 'start', '-n', 'circlepong.android/com.madtriangle.circlepong.AndroidLauncher'
// sets up the Android Eclipse project, using the old Ant based build.
eclipse
// need to specify Java source sets explicitely, SpringSource Gradle Eclipse plugin
// ignores any nodes added in classpath.file.withXml
sourceSets
main
java.srcDirs "src", 'gen'
jdt
sourceCompatibility = 1.6
targetCompatibility = 1.6
classpath
plusConfigurations += [project.configurations.compile]
containers 'com.android.ide.eclipse.adt.ANDROID_FRAMEWORK', 'com.android.ide.eclipse.adt.LIBRARIES'
project
name = appName + "-android"
natures 'com.android.ide.eclipse.adt.AndroidNature'
buildCommands.clear();
buildCommand "com.android.ide.eclipse.adt.ResourceManagerBuilder"
buildCommand "com.android.ide.eclipse.adt.PreCompilerBuilder"
buildCommand "org.eclipse.jdt.core.javabuilder"
buildCommand "com.android.ide.eclipse.adt.ApkBuilder"
// sets up the Android Idea project, using the old Ant based build.
idea
module
sourceDirs += file("src");
scopes = [COMPILE: [plus: [project.configurations.compile]]]
iml
withXml
def node = it.asNode()
def builder = NodeBuilder.newInstance();
builder.current = node;
builder.component(name: "FacetManager")
facet(type: "android", name: "Android")
configuration
option(name: "UPDATE_PROPERTY_FILES", value: "true")
dependencies
compile 'com.android.support:appcompat-v7:25.1.1'
Basegameutil 分级:
apply plugin: 'android-library'
configurations
all*.exclude group: 'com.android.support', module: 'support-v4'
repositories
mavenCentral()
buildscript
repositories
mavenCentral()
dependencies
classpath 'com.android.tools.build:gradle:2.2.3'
dependencies
compile 'com.android.support:appcompat-v7:25.1.1'
compile 'com.android.support:support-v4:25.1.1'
compile 'com.google.android.gms:play-services:10.2.0'
android
compileSdkVersion 25
buildToolsVersion '25.0.2'
【问题讨论】:
您使用的是 Any ToolBar 吗? FragmentActivity 无法解析 ToolBar。compile 'com.android.support:appcompat-v7:25.1.1'
将其添加到您的依赖项然后同步项目
@PhanVanLinh 它在 v4 支持库中而不是 v7 请参阅this
@AtefHares v7 包含 v4
是的,你是对的,我之前不知道,我以为他们是分开的,谢谢
【参考方案1】:
尝试从Basegameutile gradle
中删除此部分
configurations
all*.exclude group: 'com.android.support', module: 'support-v4'
它阻止包含支持库。
当两个或多个模块之间存在依赖冲突时使用此部分,因为它们都包含支持库。
要防止其中一个包含相同的依赖项,请使用此部分。
【讨论】:
谢谢 Mohammad 先生 :) 它对我有用 :) -- 这让我很开心 :)【参考方案2】:如果您在项目中使用 androidx,请尝试 import androidx.fragment.app.FragmentActivity。这对我有用
【讨论】:
欢迎来到 SO。是什么让您认为他们在使用androidx
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