Question

我想查看TabLayout中的新Android Design Support Layout。

TabLayout的用法只是

TabLayout tabLayout = (TabLayout) findViewById(R.id.tabLayout);

在Java和

中

<TabLayout
    android:id="@+id/tabLayout"
    android:layout_width="match_parent"
    android:layout_height="wrap_content" />

这是我的build.gradle文件（简化了一点）：

apply plugin: 'android'

android {
    compileSdkVersion 22
    buildToolsVersion '22.0.1'

    defaultConfig {
        minSdkVersion 14
        targetSdkVersion 22        

        dexOptions {
            preDexLibraries = false
            javaMaxHeapSize "4g"
        }

    }

    dexOptions {
        preDexLibraries = false
    }
}


afterEvaluate {
    tasks.matching {
        it.name.startsWith('dex')
    }.each { dx ->
        if (dx.additionalParameters == null) {
            dx.additionalParameters = ['--multi-dex']
        } else {
            dx.additionalParameters += '--multi-dex'
        }
    }
}

dependencies {
    compile fileTree(include: ['*.jar'], dir: 'libs')
    compile 'com.android.support:support-v13:22.2.0'
    compile 'com.google.android.gms:play-services-location:7.5.0'
    compile 'com.google.android.gms:play-services-base:7.5.0'
    compile 'com.google.android.gms:play-services-maps:7.5.0'
    compile 'com.google.android.gms:play-services-gcm:7.5.0'
    compile 'com.android.support:appcompat-v7:22.2.0'
    compile 'com.android.support:multidex:1.0.+'
    compile 'com.android.support:design:22.2.0'

}

导入TabLayout类并且应用程序编译并启动，但是当打开包含TabLayout的Activity时，我得到以下异常：

 Caused by: android.view.InflateException: Binary XML file line #13: Error inflating class TabLayout
        at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:757)
        at android.view.LayoutInflater.rInflate(LayoutInflater.java:806)
        at android.view.LayoutInflater.rInflate(LayoutInflater.java:809)
        at android.view.LayoutInflater.inflate(LayoutInflater.java:504)
        at android.view.LayoutInflater.inflate(LayoutInflater.java:414)
        at android.view.LayoutInflater.inflate(LayoutInflater.java:365)
        at android.support.v7.app.AppCompatDelegateImplV7.setContentView(AppCompatDelegateImplV7.java:249)
        at android.support.v7.app.AppCompatActivity.setContentView(AppCompatActivity.java:106)
        at de.mycompany.myapp.ui.LoginRegisterActivity.onCreate(LoginRegisterActivity.java:25)
        at android.app.Activity.performCreate(Activity.java:5933)
        at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1105)
        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2251)
            at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2360)
            at android.app.ActivityThread.access$800(ActivityThread.java:144)
            at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1278)
            at android.os.Handler.dispatchMessage(Handler.java:102)
            at android.os.Looper.loop(Looper.java:135)
            at android.app.ActivityThread.main(ActivityThread.java:5221)
            at java.lang.reflect.Method.invoke(Native Method)
            at java.lang.reflect.Method.invoke(Method.java:372)
            at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:899)
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:694)
 Caused by: java.lang.ClassNotFoundException: Didn't find class "android.view.TabLayout" on path: DexPathList[[zip file "/data/app/de.mycompany.myapp.debug-2/base.apk"],nativeLibraryDirectories=[/vendor/lib, /system/lib]]
        at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:56)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:511)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:469)
        at android.view.LayoutInflater.createView(LayoutInflater.java:571)
        at android.view.LayoutInflater.onCreateView(LayoutInflater.java:665)
        at com.android.internal.policy.impl.PhoneLayoutInflater.onCreateView(PhoneLayoutInflater.java:65)
        at android.view.LayoutInflater.onCreateView(LayoutInflater.java:682)
        at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:741)
            at android.view.LayoutInflater.rInflate(LayoutInflater.java:806)
            at android.view.LayoutInflater.rInflate(LayoutInflater.java:809)
            at android.view.LayoutInflater.inflate(LayoutInflater.java:504)
            at android.view.LayoutInflater.inflate(LayoutInflater.java:414)
            at android.view.LayoutInflater.inflate(LayoutInflater.java:365)
            at android.support.v7.app.AppCompatDelegateImplV7.setContentView(AppCompatDelegateImplV7.java:249)
            at android.support.v7.app.AppCompatActivity.setContentView(AppCompatActivity.java:106)
            at de.mycompany.myapp.ui.LoginRegisterActivity.onCreate(LoginRegisterActivity.java:25)
            at android.app.Activity.performCreate(Activity.java:5933)
            at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1105)
            at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2251)
            at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2360)
            at android.app.ActivityThread.access$800(ActivityThread.java:144)
            at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1278)
            at android.os.Handler.dispatchMessage(Handler.java:102)
            at android.os.Looper.loop(Looper.java:135)
            at android.app.ActivityThread.main(ActivityThread.java:5221)
            at java.lang.reflect.Method.invoke(Native Method)
            at java.lang.reflect.Method.invoke(Method.java:372)
            at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:899)
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:694)
Suppressed: java.lang.ClassNotFoundException: android.view.TabLayout
        at java.lang.Class.classForName(Native Method)
        at java.lang.BootClassLoader.findClass(ClassLoader.java:781)
        at java.lang.BootClassLoader.loadClass(ClassLoader.java:841)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:504)
        ... 27 more
 Caused by: java.lang.NoClassDefFoundError: Class not found using the boot class loader; no stack available

关于那里发生了什么的任何想法？

Answer 1

在您的XML文件中，您的TabLayout应定义如下：

<android.support.design.widget.TabLayout
    android:id="@+id/tabLayout"
    android:layout_width="match_parent"
    android:layout_height="wrap_content" />

android.support.design.widget.TabLayout 而不是 TabLayout

使用TabLayout

1 个答案: