相关疑难解决方法(0)

我正在阅读关于Android的房间库.我看到他们改变包装android来androidx.我不明白.请有人解释一下.

implementation "androidx.room:room-runtime:$room_version"
annotationProcessor "androidx.room:room-compiler:$room_version"

即使这也适用于android包装.

implementation "android.arch.persistence.room:runtime:$room_version"
annotationProcessor "android.arch.persistence.room:compiler:$room_version"

• 需要什么来包装新的支持库androidx而不是android.
• 用例和影响现有项目的因素.

我有下一个年级

dependencies {
    implementation fileTree(dir: 'libs', include: ['*.jar'])
    implementation 'com.android.support:appcompat-v7:28.0.0-rc01'
    implementation 'com.android.support.constraint:constraint-layout:1.1.2'
    testImplementation 'junit:junit:4.12'
    androidTestImplementation 'com.android.support.test:runner:1.0.2'
    androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2'
    implementation 'com.google.android.material:material:1.0.0-rc01'
}

但是当我想构建应用程序时,我会得到下一个日志:

Manifest merger failed : Attribute application@appComponentFactory value=(android.support.v4.app.CoreComponentFactory) from [com.android.support:support-compat:28.0.0-alpha3] AndroidManifest.xml:22:18-91
    is also present at [androidx.core:core:1.0.0-alpha3] AndroidManifest.xml:22:18-86 value=(androidx.core.app.CoreComponentFactory).
    Suggestion: add 'tools:replace="android:appComponentFactory"' to <application> element at AndroidManifest.xml:5:5-19:19 to override.

好! 去清单并执行:

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    package="ru.chopcode.myapplication">

    <application
        tools:replace="android:appComponentFactory"
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:roundIcon="@mipmap/ic_launcher_round"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">
    </application>

</manifest>

然后我在Logcat中收到此错误:

Manifest merger failed with multiple errors, see logs that I have …

我在构建项目时遇到以下错误.在这个项目中没有使用CoordinatorLayout.刚刚在build.gradle中添加为依赖项:

我使用的是Android Studio 3.2 Canary 4.

logcat的

AGPBI:{"kind":"error","text":"程序类型已存在:android.support.design.widget.CoordinatorLayout $ Behavior","sources":[{}],"tool":"D8" }:app:transformDexArchiveWithExternalLibsDexMergerForDebug FAILED FAILURE:构建因异常而失败.*出了什么问题:任务执行失败':app:transformDexArchiveWithExternalLibsDexMergerForDebug'.

com.android.builder.dexing.DexArchiveMergerException:合并dex存档时出错:/windows/Other/app/build/intermediates/transforms/dexBuilder/debug/0.jar,/ windows/Other/app/build/intermediates/transforms/dexBuilder/debug/1.jar,/windows/Other/app/build/intermediates/transforms/dexBuilder/debug/4.jar,.....................

/windows/Other/app/build/intermediates/transforms/dexBuilder/debug/294.jar

程序类型已存在:android.support.design.widget.CoordinatorLayout $ Behavior

的build.gradle

apply plugin: 'com.android.application'

apply plugin: 'kotlin-android'

apply plugin: 'kotlin-android-extensions'
apply plugin: 'kotlin-kapt'

android {
    compileSdkVersion 27
    buildToolsVersion "27.0.3"
    defaultConfig {
        applicationId "com.dagkot"
        minSdkVersion 16
        targetSdkVersion 27
        versionCode 1
        versionName "1.0"
        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
            buildConfigField "String", "BASE_URL", "\"http://api.openweathermap.org/data/2.5/\""
            buildConfigField "String", "API_KEY", "\"435e9075f348868c2714fe7c6895efa5\""
        }
        debug {
        minifyEnabled false
        proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        buildConfigField "String", …

我是Android App Development的新手.当我尝试创建一个新项目时,Android Project ...弹出以下消息..

错误:任务':app:preDebugAndroidTestBuild'的执行失败.

与项目':app'中的依赖'com.android.support:support-annotations'冲突.app(26.1.0)和测试app(27.1.1)的已解决版本有所不同.有关详细信息,请参阅https://d.android.com/r/tools/test-apk-dependency-conflicts.html.信息:Gradle任务[:app:generateDebugSources,:app:generateDebugAndroidTestSources,:app:mockableAndroidJar]

这是我项目的截图 点击这里查看我得到的错误的截图

我也尝试将此代码添加到我的依赖项中.androidTestCompile'c​​om.android.support:support-annotations:23.3.0'这没有用.我也尝试了27.1.1和26.1.0 ..但也没有成功.

什么是Jetifier？例如,要使用androidx打包的依赖项创建一个新项目,这个新项目需要将以下行添加到gradle.properties文件中:

android.enableJetifier=true

那是什么意思 - "启用jetifier"？

我知道,androidx和支持依赖导致multidex错误 我们不能同时使用androidx和android支持.所以我完全迁移到androidx.但我的一个依赖lib使用了android支持"lottie".

在上述情况下我们能做些什么？我应该从我的项目中删除'lottie'吗？

下面是我的傻瓜

defaultConfig {
        minSdkVersion 19
        targetSdkVersion 28
        versionCode 1
        versionName "1.0"
        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
        vectorDrawables.useSupportLibrary = true
        multiDexEnabled true
    }

    ext{
    lottieVersion = "2.5.4"
}


dependencies {
    implementation fileTree(dir: 'libs', include: ['*.jar'])
    implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"

    def androidx = "1.0.0-rc01"
    api "androidx.constraintlayout:constraintlayout:1.1.2"
    api "androidx.appcompat:appcompat:$androidx"
    api "androidx.recyclerview:recyclerview:$androidx"
    api "androidx.cardview:cardview:$androidx"
    api "androidx.core:core-ktx:$androidx"
    api "com.google.android.material:material:1.0.0-rc01"
    implementation "com.google.code.gson:gson:2.8.5"
    implementation "androidx.multidex:multidex:2.0.0"
    implementation "com.airbnb.android:lottie:$lottieVersion"
    }

我今天开始收到此错误,昨天一切正常,gradle或firebase版本没有变化

com.google.firebase库:firebase-iid正在[[17.0.0,17.0.0]]的各个其他库请求,但解析为16.2.0.禁用插件并使用./gradlew:app:dependencies检查依赖关系树.

我看到昨天是谷歌服务插件的更新,可能是导致问题.

如何解决这个问题？

我正在研究Android应用程序,我想使用3个选项卡为每个选项卡使用Fragments进行导航,但我不知道如何创建这样做的结构.

我想分别添加每个片段,因为每个片段都不同,但我不知道在FragmentActivity中将它们添加到何处.

我有这些文件.

tabs_layout.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_height="match_parent"
    android:layout_width="match_parent">

    <TabHost android:id="@android:id/tabhost"
         android:layout_width="match_parent"
         android:layout_height="match_parent">

         <LinearLayout
                android:orientation="vertical"
                android:layout_width="match_parent"
                android:layout_height="match_parent" >

             <TabWidget
                android:id="@android:id/tabs" 
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
             />

             <FrameLayout
                 android:id="@android:id/tabcontent" 
                 android:layout_width="match_parent"
                 android:layout_height="match_parent"

             >

                 <FrameLayout
                     android:id="@+id/tabRateAPet" 
                     android:layout_width="match_parent"
                     android:layout_height="match_parent"

                 />

                 <FrameLayout
                     android:id="@+id/tabViewMyRates" 
                     android:layout_width="match_parent"
                     android:layout_height="match_parent"

                 />

                 <FrameLayout
                     android:id="@+id/tabViewGlobalRates" 
                     android:layout_width="match_parent"
                     android:layout_height="match_parent"

                 />


             </FrameLayout>
        </LinearLayout>
    </TabHost>
</LinearLayout>

TabsMain.java

import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentActivity;

public class MainTabsActivity extends FragmentActivity {
public static final String RATE_A_PET = "Rate a Pet";
public static final String MY_RATES = "My Rates";
public static final …

使用Google所谓的Material Design 2.0需要您添加

implementation 'com.google.android.material:material:1.0.0-rc01'

在应用程序Gradle中也包括

implementation 'com.android.support:appcompat-v7:28.0.0-rc02'    

这显示了冲突

这是日志所说的内容

Manifest merger failed : Attribute application@appComponentFactory value=(android.support.v4.app.CoreComponentFactory) from [com.android.support:support-compat:28.0.0-rc02] AndroidManifest.xml:22:18-91   

is also present at [androidx.core:core:1.0.0-rc01] AndroidManifest.xml:22:18-86 value=(androidx.core.app.CoreComponentFactory).     Suggestion: add 'tools:replace="android:appComponentFactory"' to <application> element at AndroidManifest.xml:5:5-19:19 to override.

即使在将其添加到Manifest之后,它也显示Manifest Merger因多次错误而失败

迁移到AndroidX后，我在启动时遇到以下异常：

LoadedApk: Unable to instantiate appComponentFactory
    java.lang.ClassNotFoundException: Didn't find class               "androidx.core.app.CoreComponentFactory" on path: DexPathList[[],nativeLibraryDirectories=[/data/app/com.apps.entertainmentsolutions.offhole-yUKw5A4ysDVrPyO-DpnhKg==/lib/arm64, /system/lib64, /system/vendor/lib64]]
        at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:134)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:379)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:312)
        at android.app.LoadedApk.createAppFactory(LoadedApk.java:217)
        at android.app.LoadedApk.updateApplicationInfo(LoadedApk.java:329)
        at android.app.ActivityThread.handleDispatchPackageBroadcast(ActivityThread.java:5410)
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1743)
        at android.os.Handler.dispatchMessage(Handler.java:106)
        at android.os.Looper.loop(Looper.java:193)
        at com.android.server.SystemServer.run(SystemServer.java:460)
        at com.android.server.SystemServer.main(SystemServer.java:300)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:838)

我正在Windows 10中使用Android Studio 3.4.1。

我尝试了所有可以找到的解决方案，但问题仍然存在：

API 28（P）的Android设计支持库不起作用

关于appComponentFactory的AndroidX构建在发布模式下失败

我添加了-keep类androidx.core.app.CoreComponentFactory {*; }到proguard-rules.pro，我在gradle.properties中添加了android.useAndroidX = true和android.enableJetifier = true ...清理，重建，使chach无效并重新启动...

也禁用即时运行...

另一个奇怪的事实是，我可以从其他类中导入没有问题的类（导入androidx.core.app.CoreComponentFactory;）。

我的gradle文件。项目gradle：

// Top-level build file where you can add configuration options common to all sub-projects/modules.

    buildscript { …

今天，我正在尝试构建我的项目，但是构建失败，以下是日志：

    AGPBI: {"kind":"error","text":"No resource identifier found for attribute \u0027appComponentFactory\u0027 in package \u0027android\u0027","sources":[{"file":"xxxxx/app/build/intermediates/manifests/full/xxxxx/debug/AndroidManifest.xml","position":{"startLine":34}}],"original":"","tool":"AAPT"}
    xxxxx/app/build/intermediates/manifests/full/xxxxx/debug/AndroidManifest.xml:35: error: No resource identifier found for attribute 'appComponentFactory' in package 'android'
    Failed to execute aapt
    com.android.ide.common.process.ProcessException: Failed to execute aapt
        at com.android.builder.core.AndroidBuilder.processResources(AndroidBuilder.java:796)
        at com.android.build.gradle.tasks.ProcessAndroidResources.invokeAaptForSplit(ProcessAndroidResources.java:551)
        at com.android.build.gradle.tasks.ProcessAndroidResources.doFullTaskAction(ProcessAndroidResources.java:285)
        at com.android.build.gradle.internal.tasks.IncrementalTask.taskAction(IncrementalTask.java:109)
        at org.gradle.internal.reflect.JavaMethod.invoke(JavaMethod.java:73)
        at org.gradle.api.internal.project.taskfactory.DefaultTaskClassInfoStore$IncrementalTaskAction.doExecute(DefaultTaskClassInfoStore.java:173)
        at org.gradle.api.internal.project.taskfactory.DefaultTaskClassInfoStore$StandardTaskAction.execute(DefaultTaskClassInfoStore.java:134)
        at org.gradle.api.internal.project.taskfactory.DefaultTaskClassInfoStore$StandardTaskAction.execute(DefaultTaskClassInfoStore.java:121)
        at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter$1.run(ExecuteActionsTaskExecuter.java:122)
        at org.gradle.internal.progress.DefaultBuildOperationExecutor$RunnableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:336)
 ....
        at com.google.common.util.concurrent.AbstractFuture.complete(AbstractFuture.java:822)
        at com.google.common.util.concurrent.AbstractFuture.set(AbstractFuture.java:664)
        at com.google.common.util.concurrent.SettableFuture.set(SettableFuture.java:48)
        at com.android.build.gradle.internal.process.GradleProcessExecutor$1.run(GradleProcessExecutor.java:58)
        at org.gradle.process.internal.DefaultExecHandle$ExecResultImpl.assertNormalExitValue(DefaultExecHandle.java:380)
        at com.android.build.gradle.internal.process.GradleProcessResult.assertNormalExitValue(GradleProcessResult.java:46)
        ... 9 more
    :app:processxxxxxDebugResources FAILED
    FAILURE: Build failed with an exception.
    * What went …

我想在片段中添加一个带有 pagerview（可滚动）的选项卡。

    public class MyFragment extends Fragment {
    private FragmentTabHost tabHost;
    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        tabHost = new FragmentTabHost(getActivity());
        tabHost.setup(getActivity(), getChildFragmentManager(), R.id.realtabcontent);
        tabHost.addTab(tabHost.newTabSpec("one").setIndicator("One"), OneFragment.class, null);
        tabHost.addTab(tabHost.newTabSpec("two").setIndicator("Two"), TwoFragment.class, null);
        return tabHost;
    }


    @Override
    public void onDestroyView(){
        super.onDestroyView();
        tabHost=null;
    }
}

有了这个布局

<?xml version="1.0" encoding="utf-8"?>
<android.support.v4.app.FragmentTabHost
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@android:id/tabhost"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <LinearLayout
        android:orientation="vertical"
        android:layout_width="match_parent"
        android:layout_height="match_parent">

        <android.support.v4.view.ViewPager
            android:id="@+id/realtabcontent"
            android:layout_width="match_parent"
            android:layout_height="0dp"
            android:layout_weight="1"/>

    </LinearLayout>
</android.support.v4.app.FragmentTabHost>

我尝试了几种解决方案，但都不起作用。我需要使用片段，而不是片段活动。编写的代码工作。