【发布时间】：2016-04-14 14:39:03
【问题描述】：
我只是在观看一些 Android 教程视频来了解它。 目前我正在处理 ListViews，我想创建自己的 ListView 布局。 根据教程，我的代码（MainActivity 的一部分）如下所示：
// ListAdapter listAdapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, favoriteTVShows);
ListAdapter listAdapter = new ArrayAdapter<String>(this, R.layout.row_layout, favoriteTVShows);
ListView listView = (ListView) findViewById(R.id.lv_mainListView);
listView.setAdapter(listAdapter);
listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
String tvShowPicked = "You picked: " + String.valueOf(parent.getItemAtPosition(position));
Toast.makeText(MainActivity.this, tvShowPicked, Toast.LENGTH_SHORT).show();
}
});
}
当使用第一个注释行（simple_list_item_1）时，它可以工作，但不幸的是，我自己的布局（第二行）不行。
这是我的 row_layout.xml：
<?xml version="1.0" encoding="utf-8"?>
<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"
tools:context="de.oetzi.introductionlistviews.MainActivity"
android:id="@+id/linearLayout1">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/textView1"
android:textSize="30sp"
android:textStyle="bold"
android:padding="15dp"/>
</LinearLayout>
最后，有趣的是堆栈跟踪... 顺便说一句，另一个新手问题：我如何从堆栈跟踪中得出哪个类中的哪一行是邪恶的？
04-14 17:17:47.269 406-406/de.oetzi.introductionlistviews E/ArrayAdapter: You must supply a resource ID for a TextView 04-14 17:17:47.272 406-406/de.oetzi.introductionlistviews D/AndroidRuntime: Shutting down VM 04-14 17:17:47.275 406-406/de.oetzi.introductionlistviews E/AndroidRuntime: FATAL EXCEPTION: main
Process: de.oetzi.introductionlistviews, PID: 406
java.lang.IllegalStateException: ArrayAdapter requires the resource ID to be a TextView
at android.widget.ArrayAdapter.createViewFromResource(ArrayAdapter.java:386)
at android.widget.ArrayAdapter.getView(ArrayAdapter.java:362)
at android.widget.AbsListView.obtainView(AbsListView.java:2349)
at android.widget.ListView.makeAndAddView(ListView.java:1864)
at android.widget.ListView.fillDown(ListView.java:698)
at android.widget.ListView.fillFromTop(ListView.java:759)
at android.widget.ListView.layoutChildren(ListView.java:1673)
at android.widget.AbsListView.onLayout(AbsListView.java:2153)
at android.view.View.layout(View.java:15678)
at android.view.ViewGroup.layout(ViewGroup.java:5039)
at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1703)
at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1557)
at android.widget.LinearLayout.onLayout(LinearLayout.java:1466)
at android.view.View.layout(View.java:15678)
at android.view.ViewGroup.layout(ViewGroup.java:5039)
at android.support.design.widget.HeaderScrollingViewBehavior.layoutChild(HeaderScrollingViewBehavior.java:122)
at android.support.design.widget.ViewOffsetBehavior.onLayoutChild(ViewOffsetBehavior.java:42)
at android.support.design.widget.AppBarLayout$ScrollingViewBehavior.onLayoutChild(AppBarLayout.java:1170)
at android.support.design.widget.CoordinatorLayout.onLayout(CoordinatorLayout.java:814)
at android.view.View.layout(View.java:15678)
at android.view.ViewGroup.layout(ViewGroup.java:5039)
at android.widget.FrameLayout.layoutChildren(FrameLayout.java:579)
at android.widget.FrameLayout.onLayout(FrameLayout.java:514)
at android.view.View.layout(View.java:15678)
at android.view.ViewGroup.layout(ViewGroup.java:5039)
at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1703)
at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1557)
at android.widget.LinearLayout.onLayout(LinearLayout.java:1466)
at android.view.View.layout(View.java:15678)
at android.view.ViewGroup.layout(ViewGroup.java:5039)
at android.widget.FrameLayout.layoutChildren(FrameLayout.java:579)
at android.widget.FrameLayout.onLayout(FrameLayout.java:514)
at android.view.View.layout(View.java:15678)
at android.view.ViewGroup.layout(ViewGroup.java:5039)
at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1703)
at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1557)
at android.widget.LinearLayout.onLayout(LinearLayout.java:1466)
at android.view.View.layout(View.java:15678)
at android.view.ViewGroup.layout(ViewGroup.java:5039)
at android.widget.FrameLayout.layoutChildren(FrameLayout.java:579)
at android.widget.FrameLayout.onLayout(FrameLayout.java:514)
at android.view.View.layout(View.java:15678)
at android.view.ViewGroup.layout(ViewGroup.java:5039)
at android.view.ViewRootImpl.performLayout(ViewRootImpl.java:2086)
at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1843)
at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1061)
at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:5891)
at android.view.Choreographer$CallbackRecord.run(Choreographer.java:767)
at android.view.Choreographer.doCallbacks(Choreographer.java:580)
at android.view.Choreographer.doFrame(Choreographer.java:550)
at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:753)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5293)
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:904)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:699)
Caused by: java.lang.ClassCastException: android.widget.LinearLayout cannot be cast to android.widget.TextView
at android.widge
【问题讨论】：
-
java.lang.IllegalStateException: ArrayAdapter requires the resource ID to be a TextView- 基本上，ArrayAdapter只接受一种视图 - 一个名为@android:id/text1的 TextView -
看看 ArrayAdapter.getView 源代码...还要检查构造函数的文档 textViewResourceId 参数