应用程序在加载自定义列表布局时崩溃

Question

我想创建一个自定义列表布局。下面是做它的方法：

private void setUpList() { 
    String[] items = {"item 1" , "item 2", "item 3","item 4" , "item 5", "item 6"}; 
    ArrayAdapter arrayadp = new ArrayAdapter(this, R.layout.list_layout, items); 
    setListAdapter(arrayadp);  
} 

，这里是list_layout.xml

<?xml version="1.0" encoding="utf-8"?> 
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
android:orientation="vertical" 
android:layout_width="match_parent" 
android:layout_height="match_parent"> 
<TextView android:layout_width="match_parent" 
      android:layout_height="match_parent" 
</LinearLayout> 

如果我改变R.layout.list_layout到android.R.layout.simple_list_item_1它工作正常，但我需要使用自定义的一个。我如何做到这一点，而没有应用程序崩溃。

这里是崩溃日志

10-06 17:59:55.488: ERROR/AndroidRuntime(6941): FATAL EXCEPTION: main 
10-06 17:59:55.488: ERROR/AndroidRuntime(6941): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.srose.forumapp/com.srose.forumapp.HotelsActivity}: java.lang.NullPointerException 
10-06 17:59:55.488: ERROR/AndroidRuntime(6941):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1815) 
10-06 17:59:55.488: ERROR/AndroidRuntime(6941):  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1831) 
10-06 17:59:55.488: ERROR/AndroidRuntime(6941):  at android.app.ActivityThread.access$500(ActivityThread.java:122) 
10-06 17:59:55.488: ERROR/AndroidRuntime(6941):  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1024) 
10-06 17:59:55.488: ERROR/AndroidRuntime(6941):  at android.os.Handler.dispatchMessage(Handler.java:99) 
10-06 17:59:55.488: ERROR/AndroidRuntime(6941):  at android.os.Looper.loop(Looper.java:132) 
10-06 17:59:55.488: ERROR/AndroidRuntime(6941):  at android.app.ActivityThread.main(ActivityThread.java:4123) 
10-06 17:59:55.488: ERROR/AndroidRuntime(6941):  at java.lang.reflect.Method.invokeNative(Native Method) 
10-06 17:59:55.488: ERROR/AndroidRuntime(6941):  at java.lang.reflect.Method.invoke(Method.java:491) 
10-06 17:59:55.488: ERROR/AndroidRuntime(6941):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:841) 
10-06 17:59:55.488: ERROR/AndroidRuntime(6941):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:599) 
10-06 17:59:55.488: ERROR/AndroidRuntime(6941):  at dalvik.system.NativeStart.main(Native Method) 
10-06 17:59:55.488: ERROR/AndroidRuntime(6941): Caused by: java.lang.NullPointerException 
10-06 17:59:55.488: ERROR/AndroidRuntime(6941):  at com.srose.forumapp.HotelsActivity.setupListView(HotelsActivity.java:38) 
10-06 17:59:55.488: ERROR/AndroidRuntime(6941):  at com.srose.forumapp.HotelsActivity.onCreate(HotelsActivity.java:29) 
10-06 17:59:55.488: ERROR/AndroidRuntime(6941):  at android.app.Activity.performCreate(Activity.java:4397) 
10-06 17:59:55.488: ERROR/AndroidRuntime(6941):  at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1048) 
10-06 17:59:55.488: ERROR/AndroidRuntime(6941):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1779) 
10-06 17:59:55.488: ERROR/AndroidRuntime(6941):  ... 11 more 

新的崩溃日志

10-06 19:11:08.648: ERROR/ArrayAdapter(8552): You must supply a resource ID for a TextView 
10-06 19:11:08.648: DEBUG/AndroidRuntime(8552): Shutting down VM 
10-06 19:11:08.648: WARN/dalvikvm(8552): threadid=1: thread exiting with uncaught exception (group=0x40014760) 
10-06 19:11:08.678: ERROR/AndroidRuntime(8552): FATAL EXCEPTION: main 
10-06 19:11:08.678: ERROR/AndroidRuntime(8552): java.lang.IllegalStateException: ArrayAdapter requires the resource ID to be a TextView 
10-06 19:11:08.678: ERROR/AndroidRuntime(8552):  at android.widget.ArrayAdapter.createViewFromResource(ArrayAdapter.java:390) 
10-06 19:11:08.678: ERROR/AndroidRuntime(8552):  at android.widget.ArrayAdapter.getView(ArrayAdapter.java:366) 
10-06 19:11:08.678: ERROR/AndroidRuntime(8552):  at android.widget.AbsListView.obtainView(AbsListView.java:1970) 
10-06 19:11:08.678: ERROR/AndroidRuntime(8552):  at android.widget.ListView.measureHeightOfChildren(ListView.java:1228) 
10-06 19:11:08.678: ERROR/AndroidRuntime(8552):  at android.widget.ListView.onMeasure(ListView.java:1139) 
10-06 19:11:08.678: ERROR/AndroidRuntime(8552):  at android.view.View.measure(View.java:10828) 
10-06 19:11:08.678: ERROR/AndroidRuntime(8552):  at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:4351) 
10-06 19:11:08.678: ERROR/AndroidRuntime(8552):  at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1284) 
10-06 19:11:08.678: ERROR/AndroidRuntime(8552):  at android.widget.LinearLayout.measureVertical(LinearLayout.java:613) 
10-06 19:11:08.678: ERROR/AndroidRuntime(8552):  at android.widget.LinearLayout.onMeasure(LinearLayout.java:519) 
10-06 19:11:08.678: ERROR/AndroidRuntime(8552):  at android.view.View.measure(View.java:10828) 
10-06 19:11:08.678: ERROR/AndroidRuntime(8552):  at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:4351) 
10-06 19:11:08.678: ERROR/AndroidRuntime(8552):  at android.widget.FrameLayout.onMeasure(FrameLayout.java:267) 
10-06 19:11:08.678: ERROR/AndroidRuntime(8552):  at android.view.View.measure(View.java:10828) 
10-06 19:11:08.678: ERROR/AndroidRuntime(8552):  at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:4351) 
10-06 19:11:08.678: ERROR/AndroidRuntime(8552):  at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1284) 
10-06 19:11:08.678: ERROR/AndroidRuntime(8552):  at android.widget.LinearLayout.measureVertical(LinearLayout.java:613) 
10-06 19:11:08.678: ERROR/AndroidRuntime(8552):  at android.widget.LinearLayout.onMeasure(LinearLayout.java:519) 
10-06 19:11:08.678: ERROR/AndroidRuntime(8552):  at android.view.View.measure(View.java:10828) 
10-06 19:11:08.678: ERROR/AndroidRuntime(8552):  at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:4351) 
10-06 19:11:08.678: ERROR/AndroidRuntime(8552):  at android.widget.FrameLayout.onMeasure(FrameLayout.java:267) 
10-06 19:11:08.678: ERROR/AndroidRuntime(8552):  at com.android.internal.policy.impl.PhoneWindow$DecorView.onMeasure(PhoneWindow.java:1889) 
10-06 19:11:08.678: ERROR/AndroidRuntime(8552):  at android.view.View.measure(View.java:10828) 
10-06 19:11:08.678: ERROR/AndroidRuntime(8552):  at android.view.ViewRoot.performTraversals(ViewRoot.java:938) 
10-06 19:11:08.678: ERROR/AndroidRuntime(8552):  at android.view.ViewRoot.handleMessage(ViewRoot.java:2040) 
10-06 19:11:08.678: ERROR/AndroidRuntime(8552):  at android.os.Handler.dispatchMessage(Handler.java:99) 
10-06 19:11:08.678: ERROR/AndroidRuntime(8552):  at android.os.Looper.loop(Looper.java:132) 
10-06 19:11:08.678: ERROR/AndroidRuntime(8552):  at android.app.ActivityThread.main(ActivityThread.java:4123) 
10-06 19:11:08.678: ERROR/AndroidRuntime(8552):  at java.lang.reflect.Method.invokeNative(Native Method) 
10-06 19:11:08.678: ERROR/AndroidRuntime(8552):  at java.lang.reflect.Method.invoke(Method.java:491) 
10-06 19:11:08.678: ERROR/AndroidRuntime(8552):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:841) 
10-06 19:11:08.678: ERROR/AndroidRuntime(8552):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:599) 
10-06 19:11:08.678: ERROR/AndroidRuntime(8552):  at dalvik.system.NativeStart.main(Native Method) 
10-06 19:11:08.678: ERROR/AndroidRuntime(8552): Caused by: java.lang.ClassCastException: android.widget.LinearLayout cannot be cast to android.widget.TextView 
10-06 19:11:08.678: ERROR/AndroidRuntime(8552):  at android.widget.ArrayAdapter.createViewFromResource(ArrayAdapter.java:383) 
10-06 19:11:08.678: ERROR/AndroidRuntime(8552):  ... 32 more 

Answer 1

尝试添加这对您的TextView

android:id="@android:id/text1"，

你需要的TextView一个id，simple_list_item_1管理有一个textView与上面的行。我认为这就是你所错过的。

Answer 2

除了添加机器人：ID = “@机器人：ID/text1” 中，删除布局标记，以便它看起来像：

<?xml version="1.0" encoding="utf-8"?> 

<TextView xmlns:android="http://schemas.android.com/apk/res/android" 
    android:id="@android:id/text1" 
    android:layout_width="match_parent" 
    android:layout_height="match_parent" 
/>