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我正在尝试让 HoloEverywhere 类 AutoCompleteTextView 与我的应用程序一起使用。这样做的主要原因是我希望 Holo 主题在 3.0 之前的设备（特别是 API 级别 8-10）上工作这是我的主要活动代码：

package com.example.testautocomp;

import org.holoeverywhere.widget.AutoCompleteTextView;

import android.app.Activity;
import android.os.Bundle;
import android.widget.ArrayAdapter;

public class MainActivity extends Activity {

    private AutoCompleteTextView m_edit;

    private static final String[] items = { "lorem", "ipsum", "dolor", "sit",
        "amet", "consectetuer", "adipiscing", "elit", "morbi", "vel",
        "augue", "purus", "sitter", "sitting", "sither", "sithar" };

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    m_edit = (AutoCompleteTextView)findViewById(R.id.edit2);

    m_edit.setAdapter(new ArrayAdapter<String>(this,
            android.R.layout.simple_dropdown_item_1line, items));
    }
}

还有我的 activity_main.xml 代码：

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

<AutoCompleteTextView
    android:id="@+id/edit2"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:completionThreshold="1"
    android:hint="Testing" />
</LinearLayout>

当我运行我的应用程序时，它会进入 eclipse 的调试器，在按 resume（或 F8）继续线程后，我的应用程序崩溃/强制关闭，并且我的 LogCat 中出现以下错误：

04-19 17:52:56.342: W/dalvikvm(675): threadid=1: thread exiting with uncaught exception (group=0x409c01f8)
04-19 17:52:56.422: E/AndroidRuntime(675): FATAL EXCEPTION: main
04-19 17:52:56.422: E/AndroidRuntime(675): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.testautocomp/com.example.testautocomp.MainActivity}: java.lang.ClassCastException: android.widget.AutoCompleteTextView cannot be cast to org.holoeverywhere.widget.AutoCompleteTextView
04-19 17:52:56.422: E/AndroidRuntime(675):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1956)
04-19 17:52:56.422: E/AndroidRuntime(675):  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1981)
04-19 17:52:56.422: E/AndroidRuntime(675):  at android.app.ActivityThread.access$600(ActivityThread.java:123)
04-19 17:52:56.422: E/AndroidRuntime(675):  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1147)
04-19 17:52:56.422: E/AndroidRuntime(675):  at android.os.Handler.dispatchMessage(Handler.java:99)
04-19 17:52:56.422: E/AndroidRuntime(675):  at android.os.Looper.loop(Looper.java:137)
04-19 17:52:56.422: E/AndroidRuntime(675):  at android.app.ActivityThread.main(ActivityThread.java:4424)
04-19 17:52:56.422: E/AndroidRuntime(675):  at java.lang.reflect.Method.invokeNative(Native Method)
04-19 17:52:56.422: E/AndroidRuntime(675):  at java.lang.reflect.Method.invoke(Method.java:511)
04-19 17:52:56.422: E/AndroidRuntime(675):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
04-19 17:52:56.422: E/AndroidRuntime(675):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
04-19 17:52:56.422: E/AndroidRuntime(675):  at dalvik.system.NativeStart.main(Native Method)
04-19 17:52:56.422: E/AndroidRuntime(675): Caused by: java.lang.ClassCastException: android.widget.AutoCompleteTextView cannot be cast to org.holoeverywhere.widget.AutoCompleteTextView
04-19 17:52:56.422: E/AndroidRuntime(675):  at com.example.testautocomp.MainActivity.onCreate(MainActivity.java:22)
04-19 17:52:56.422: E/AndroidRuntime(675):  at android.app.Activity.performCreate(Activity.java:4465)
04-19 17:52:56.422: E/AndroidRuntime(675):  at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1049)
04-19 17:52:56.422: E/AndroidRuntime(675):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1920)
04-19 17:52:56.422: E/AndroidRuntime(675):  ... 11 more

我该如何解决这个 CastClassException？

4

2 回答 2

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不，您的上述操作不正确。您应该更改 org.holoeverywhere.app.Activity 上的活动基类。

于 2013-04-20T11:55:56.547 回答
-1

非常类似于这个问题

通过将我的 main_activity.xml 更改为：

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

<org.holoeverywhere.widget.AutoCompleteTextView
    android:id="@+id/edit2"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:completionThreshold="1"
    android:hint="Testing" />
</LinearLayout>

主要部分是org.holoeverywhere.widget.AutoCompleteTextView

于 2013-04-20T01:11:15.450 回答