无法实例化类 android.support.v7.widget.SearchView

【问题标题】：Cannot instantiate class android.support.v7.widget.SearchView无法实例化类 android.support.v7.widget.SearchView
【发布时间】：2014-03-22 18:52:32
【问题描述】：

请有人帮助我！我尝试将 appcompat 搜索视图添加到我的项目中。不成功。当我将 android.support.v7.widget.SearchView 更改为 SearchView (API > 10) 时，一切都很好。

这是我的菜单资源：

<item android:id="@+id/action_search"
    android:title="@string/search_view_title"
    android:icon="@drawable/action_search"
    sabd:showAsAction="always|collapseActionView"
    sabd:actionViewClass="android.support.v7.widget.SearchView" />

这是我尝试使用 SeachView 的方式：

    @Override
    public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
        inflater.inflate(R.menu.teach, menu);
        mSearchItem = menu.findItem(R.id.action_search);
        mSearchItem.setVisible(true);
        mSearchView = (SearchView) MenuItemCompat.getActionView(mSearchItem);
        mSearchView.setQueryHint(getString(R.string.search_view_hint));
        mSearchView.setOnQueryTextListener(this);
    }

这是我的清单文件：

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="ru.rgups.time"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk
        android:minSdkVersion="10"
        android:targetSdkVersion="17" />

    <uses-permission android:name="android.permission.INTERNET"/>
    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
    <uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>

    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/Theme.Base.AppCompat.Light"
        android:name="RTApplication">
        <activity
            android:name="ru.rgups.time.MainActivity"
            android:configChanges="orientation|keyboardHidden"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <activity android:name=".fragments.WelcomeActivity"></activity>
        <service android:name=".spice.SampleSpiceService"></service>
        <activity android:name=".activities.AuthActivity"></activity>
        <activity 
            android:name=".activities.HomeWorkActivity"
            android:uiOptions="splitActionBarWhenNarrow">

        </activity>

        <receiver android:name="ru.rgups.time.receiver.HomeWorkNotificationReceiver">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />            </intent-filter>
        </receiver>

    </application>

</manifest>

这是我在日志中看到的：

   03-22 21:46:58.583: W/SupportMenuInflater(28798): Cannot instantiate class: android.support.v7.widget.SearchView
    03-22 21:46:58.583: W/SupportMenuInflater(28798): java.lang.reflect.InvocationTargetException
    03-22 21:46:58.583: W/SupportMenuInflater(28798):  at java.lang.reflect.Constructor.constructNative(Native Method)
    03-22 21:46:58.583: W/SupportMenuInflater(28798):  at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
    03-22 21:46:58.583: W/SupportMenuInflater(28798):  at android.support.v7.internal.view.SupportMenuInflater$MenuState.newInstance(SupportMenuInflater.java:482)
    03-22 21:46:58.583: W/SupportMenuInflater(28798):  at android.support.v7.internal.view.SupportMenuInflater$MenuState.setItem(SupportMenuInflater.java:441)
    03-22 21:46:58.583: W/SupportMenuInflater(28798):  at android.support.v7.internal.view.SupportMenuInflater$MenuState.addItem(SupportMenuInflater.java:462)
    03-22 21:46:58.583: W/SupportMenuInflater(28798):  at android.support.v7.internal.view.SupportMenuInflater.parseMenu(SupportMenuInflater.java:196)
    03-22 21:46:58.583: W/SupportMenuInflater(28798):  at android.support.v7.internal.view.SupportMenuInflater.inflate(SupportMenuInflater.java:118)
    03-22 21:46:58.583: W/SupportMenuInflater(28798):  at ru.rgups.time.fragments.TeachersListFragment.onCreateOptionsMenu(TeachersListFragment.java:109)
    03-22 21:46:58.583: W/SupportMenuInflater(28798):  at android.support.v4.app.Fragment.performCreateOptionsMenu(Fragment.java:1582)
    03-22 21:46:58.583: W/SupportMenuInflater(28798):  at android.support.v4.app.FragmentManagerImpl.dispatchCreateOptionsMenu(FragmentManager.java:1956)
    03-22 21:46:58.583: W/SupportMenuInflater(28798):  at android.support.v4.app.FragmentActivity.onCreatePanelMenu(FragmentActivity.java:225)
    03-22 21:46:58.583: W/SupportMenuInflater(28798):  at android.support.v7.app.ActionBarActivity.superOnCreatePanelMenu(ActionBarActivity.java:232)
    03-22 21:46:58.583: W/SupportMenuInflater(28798):  at android.support.v7.app.ActionBarActivityDelegateICS.onCreatePanelMenu(ActionBarActivityDelegateICS.java:147)
    03-22 21:46:58.583: W/SupportMenuInflater(28798):  at android.support.v7.app.ActionBarActivity.onCreatePanelMenu(ActionBarActivity.java:199)
    03-22 21:46:58.583: W/SupportMenuInflater(28798):  at android.support.v7.app.ActionBarActivityDelegateICS$WindowCallbackWrapper.onCreatePanelMenu(ActionBarActivityDelegateICS.java:285)
    03-22 21:46:58.583: W/SupportMenuInflater(28798):  at com.android.internal.policy.impl.PhoneWindow.preparePanel(PhoneWindow.java:436)
    03-22 21:46:58.583: W/SupportMenuInflater(28798):  at com.android.internal.policy.impl.PhoneWindow.doInvalidatePanelMenu(PhoneWindow.java:800)
    03-22 21:46:58.583: W/SupportMenuInflater(28798):  at com.android.internal.policy.impl.PhoneWindow$1.run(PhoneWindow.java:221)
    03-22 21:46:58.583: W/SupportMenuInflater(28798):  at android.view.Choreographer$CallbackRecord.run(Choreographer.java:761)
    03-22 21:46:58.583: W/SupportMenuInflater(28798):  at android.view.Choreographer.doCallbacks(Choreographer.java:574)
    03-22 21:46:58.583: W/SupportMenuInflater(28798):  at android.view.Choreographer.doFrame(Choreographer.java:543)
    03-22 21:46:58.583: W/SupportMenuInflater(28798):  at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:747)
    03-22 21:46:58.583: W/SupportMenuInflater(28798):  at android.os.Handler.handleCallback(Handler.java:733)
    03-22 21:46:58.583: W/SupportMenuInflater(28798):  at android.os.Handler.dispatchMessage(Handler.java:95)
    03-22 21:46:58.583: W/SupportMenuInflater(28798):  at android.os.Looper.loop(Looper.java:136)
    03-22 21:46:58.583: W/SupportMenuInflater(28798):  at android.app.ActivityThread.main(ActivityThread.java:5017)
    03-22 21:46:58.583: W/SupportMenuInflater(28798):  at java.lang.reflect.Method.invokeNative(Native Method)
    03-22 21:46:58.583: W/SupportMenuInflater(28798):  at java.lang.reflect.Method.invoke(Method.java:515)
    03-22 21:46:58.583: W/SupportMenuInflater(28798):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:779)
    03-22 21:46:58.583: W/SupportMenuInflater(28798):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:595)
    03-22 21:46:58.583: W/SupportMenuInflater(28798):  at dalvik.system.NativeStart.main(Native Method)
    03-22 21:46:58.583: W/SupportMenuInflater(28798): Caused by: android.view.InflateException: Binary XML file line #41: Error inflating class <unknown>
    03-22 21:46:58.583: W/SupportMenuInflater(28798):  at android.view.LayoutInflater.createView(LayoutInflater.java:620)
    03-22 21:46:58.583: W/SupportMenuInflater(28798):  at com.android.internal.policy.impl.PhoneLayoutInflater.onCreateView(PhoneLayoutInflater.java:56)
    03-22 21:46:58.583: W/SupportMenuInflater(28798):  at android.view.LayoutInflater.onCreateView(LayoutInflater.java:669)
    03-22 21:46:58.583: W/SupportMenuInflater(28798):  at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:694)
    03-22 21:46:58.583: W/SupportMenuInflater(28798):  at android.view.LayoutInflater.rInflate(LayoutInflater.java:755)
    03-22 21:46:58.583: W/SupportMenuInflater(28798):  at android.view.LayoutInflater.inflate(LayoutInflater.java:492)
    03-22 21:46:58.583: W/SupportMenuInflater(28798):  at android.view.LayoutInflater.inflate(LayoutInflater.java:397)
    03-22 21:46:58.583: W/SupportMenuInflater(28798):  at android.support.v7.widget.SearchView.<init>(SearchView.java:262)
    03-22 21:46:58.583: W/SupportMenuInflater(28798):  at android.support.v7.widget.SearchView.<init>(SearchView.java:254)
    03-22 21:46:58.583: W/SupportMenuInflater(28798):  ... 31 more
    03-22 21:46:58.583: W/SupportMenuInflater(28798): Caused by: java.lang.reflect.InvocationTargetException
    03-22 21:46:58.583: W/SupportMenuInflater(28798):  at java.lang.reflect.Constructor.constructNative(Native Method)
    03-22 21:46:58.583: W/SupportMenuInflater(28798):  at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
    03-22 21:46:58.583: W/SupportMenuInflater(28798):  at android.view.LayoutInflater.createView(LayoutInflater.java:594)
    03-22 21:46:58.583: W/SupportMenuInflater(28798):  ... 39 more
    03-22 21:46:58.583: W/SupportMenuInflater(28798): Caused by: android.content.res.Resources$NotFoundException: Resource is not a Drawable (color or path): TypedValue{t=0x2/d=0x7f010069 a=-1}
    03-22 21:46:58.583: W/SupportMenuInflater(28798):  at android.content.res.Resources.loadDrawable(Resources.java:2068)
    03-22 21:46:58.583: W/SupportMenuInflater(28798):  at android.content.res.TypedArray.getDrawable(TypedArray.java:602)
    03-22 21:46:58.583: W/SupportMenuInflater(28798):  at android.widget.ImageView.<init>(ImageView.java:129)
    03-22 21:46:58.583: W/SupportMenuInflater(28798):  at android.widget.ImageView.<init>(ImageView.java:119)
    03-22 21:46:58.583: W/SupportMenuInflater(28798):  ... 42 more

【问题讨论】：

  • 发布您的manifest 文件

标签： android android-menu searchview android-appcompat


【解决方案1】：

在切换到 v21 支持库时，我的发布版本中可能出现了类似的问题，但调试版本中没有。原来是一个混淆问题，将此行添加到我的proguard-rules.txt 文件中修复了它：

-keep class android.support.v7.widget.SearchView { *; }

【讨论】：

  • 我应该在哪里添加这一行？
  • 如果你使用 proroguard 那么你应该添加到你的 proguard 规则文件中。如果您不使用 proguard，那么这并不能解决您的问题。
【解决方案2】：

我在使用 Android Studio 和 Gradle 构建项目时遇到了同样的问题。我想添加一个 v7 兼容的 SearchView。

解决方法是将 gradle 插件版本从 0.9.1 或其他版本更改为 0.9.0。这是我找到的一种临时方式。这可能是 gradle 插件的错误。 希望对您有所帮助。

    dependencies {
        classpath "com.android.tools.build:gradle:0.9.0"
    }

【讨论】：

  • 感谢您的回答，但我正在使用 Eclipse 和 Ant。
【解决方案3】：

问题出在错误的 v7 支持库中。更新后一切正常。

【讨论】：

  • 现在好像又有了，不是吗？我在 Nexus 7 上的 Android L 上从一位最终用户那里得到它。
  • 是的，随着 5.0 更新到支持库，问题似乎又回来了
  • 尝试将此添加到您的 proguard：-keep class android.support.v7.widget.SearchView { *; } 参考：stackoverflow.com/questions/23413938/…
  • 我不做任何混淆，并在调试模式下不断遇到问题
猜你喜欢
  • 1970-01-01
  • 1970-01-01
  • 1970-01-01
  • 1970-01-01
  • 1970-01-01
  • 2018-04-16
  • 2014-12-21
  • 2018-02-02
  • 1970-01-01
相关资源
最近更新 更多
热门标签
Java Python linux javascript Mysql C# Docker 算法 前端 SpringBoot Redis Vue spring 设计模式 .net core .net kubernetes c++ 数据库 数据结构 大数据 js 机器学习 微服务 Android Go 程序员 面试 JVM ASP.net core 云原生 人工智能 后端 PHP git CSS golang k8s Nginx Django mybatis 深度学习 多线程 React 架构 devops 爬虫 云计算 Spring Boot LeetCode