Java 为什么我的ListView会使我的应用程序崩溃，而不是列出我的条目？
我是一个Android初学者，我将一些代码复制到一起，得到了我的第一个简单列表视图。 但它不起作用。它没有工作，反而使我的应用程序崩溃。 如果您能帮助我正确使用ListView，我们将不胜感激，谢谢 MainActivity.java：Java 为什么我的ListView会使我的应用程序崩溃，而不是列出我的条目？,java,android,listview,android-recyclerview,android-listview,Java,Android,Listview,Android Recyclerview,Android Listview,我是一个Android初学者，我将一些代码复制到一起，得到了我的第一个简单列表视图。 但它不起作用。它没有工作，反而使我的应用程序崩溃。 如果您能帮助我正确使用ListView，我们将不胜感激，谢谢 MainActivity.java： package com.example.listview_test; import android.os.Bundle; import android.app.Activity; import android.view.Menu; import android
package com.example.listview_test;
import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.widget.ArrayAdapter;import android.widget.ListView;
public class MainActivity extends Activity
{
// Array of strings...
ListView simpleList;
String countryList[] = {"India", "China", "australia", "Portugle", "America", "NewZealand"};
@Override protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
simpleList = (ListView)findViewById(R.id.simpleListView);
ArrayAdapter<String> arrayAdapter = new ArrayAdapter<String>(this, R.layout.activity_listview, R.id.textView, countryList);
simpleList.setAdapter(arrayAdapter);
}
}
package com.example.listview\u测试；
导入android.os.Bundle；
导入android.app.Activity；
导入android.view.Menu；
导入android.widget.ArrayAdapter；导入android.widget.ListView；
公共类MainActivity扩展了活动
{
//字符串数组。。。
ListView单纯形列表；
字符串countryList[]={“印度”、“中国”、“澳大利亚”、“葡萄牙”、“美国”、“新西兰”}；
@在创建时覆盖受保护的void（Bundle savedInstanceState）{
super.onCreate（savedInstanceState）；
setContentView（R.layout.activity_main）；
simpleList=（ListView）findViewById（R.id.simpleList视图）；
ArrayAdapter ArrayAdapter=新的ArrayAdapter（this，R.layout.activity_listview，R.id.textView，countryList）；
simpleList.setAdapter（arrayAdapter）；
}
}
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<ListView
android:id="@+id/simpleListView"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:divider="@color/material_blue_grey_800"
android:dividerHeight="1dp" />
</LinearLayout>
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<TextView
android:id="@+id/textView"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:padding="@mipmap/ic_launcher" />
</LinearLayout>
11-08 10:01:59.277 3676-3676/com.example.listview_test E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.example.listview_test, PID: 3676
android.view.InflateException: Binary XML file line #7: Error inflating class android.widget.TextView
at android.view.LayoutInflater.createView(LayoutInflater.java:652)
at com.android.internal.policy.impl.PhoneLayoutInflater.onCreateView(PhoneLayoutInflater.java:55)
at com.android.internal.policy.impl.HwPhoneLayoutInflater.onCreateView(HwPhoneLayoutInflater.java:75)
at android.view.LayoutInflater.onCreateView(LayoutInflater.java:701)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:760)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:825)
at android.view.LayoutInflater.inflate(LayoutInflater.java:523)
at android.view.LayoutInflater.inflate(LayoutInflater.java:425)
at android.widget.ArrayAdapter.createViewFromResource(ArrayAdapter.java:371)
at android.widget.ArrayAdapter.getView(ArrayAdapter.java:362)
at android.widget.AbsListView.obtainView(AbsListView.java:2481)
at android.widget.ListView.measureHeightOfChildren(ListView.java:1289)
at android.widget.ListView.onMeasure(ListView.java:1197)
at android.view.View.measure(View.java:17970)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5710)
at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1723)
at android.widget.LinearLayout.measureVertical(LinearLayout.java:785)
at android.widget.LinearLayout.onMeasure(LinearLayout.java:654)
at android.view.View.measure(View.java:17970)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5710)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:465)
at android.view.View.measure(View.java:17970)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5710)
at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1723)
at android.widget.LinearLayout.measureVertical(LinearLayout.java:785)
at android.widget.LinearLayout.onMeasure(LinearLayout.java:654)
at android.view.View.measure(View.java:17970)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5710)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:465)
at com.android.internal.policy.impl.PhoneWindow$DecorView.onMeasure(PhoneWindow.java:2755)
at android.view.View.measure(View.java:17970)
at android.view.ViewRootImpl.performMeasure(ViewRootImpl.java:2438)
at android.view.ViewRootImpl.measureHierarchy(ViewRootImpl.java:1418)
at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1642)
at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1296)
at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:6742)
at android.view.Choreographer$CallbackRecord.run(Choreographer.java:826)
at android.view.Choreographer.doCallbacks(Choreographer.java:629)
at android.view.Choreographer.doFrame(Choreographer.java:597)
at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:812)
at android.os.Handler.handleCallback(Handler.java:815)
at android.os.Handler.dispatchMessage(Handler.java:104)
at android.os.Looper.loop(Looper.java:194)
at android.app.ActivityThread.main(ActivityThread.java:5929)
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:987)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:782)
Caused by: java.lang.reflect.InvocationTargetException
at java.lang.reflect.Constructor.newInstance(Native Method)
at java.lang.reflect.Constructor.newInstance(Constructor.java:288)
at android.view.LayoutInflater.createView(LayoutInflater.java:626)
at com.android.internal.policy.impl.PhoneLayoutInflater.onCreateView(PhoneLayoutInflater.java:55)
at com.android.internal.policy.impl.HwPhoneLayoutInflater.onCreateView(HwPhoneLayoutInflater.java:75)
at android.view.LayoutInflater.onCreateView(LayoutInflater.java:701)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:760)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:825)
at android.view.LayoutInflater.inflate(LayoutInflater.java:523)
at android.view.LayoutInflater.inflate(LayoutInflater.java:425)
at android.widget.ArrayAdapter.createViewFromResource(ArrayAdapter.java:371)
at android.widget.ArrayAdapter.getView(ArrayAdapter.java:362)
at android.widget.AbsListView.obtainView(AbsListView.java:2481)
at android.widget.ListView.measureHeightOfChildren(ListView.java:1289)
at android.widget.ListView.onMeasure(ListView.java:1197)
at android.view.View.measure(View.java:17970)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5710)
at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1723)
at android.widget.LinearLayout.measureVertical(LinearLayout.java:785)
at android.widget.LinearLayout.onMeasure(LinearLayout.java:654)
at android.view.View.measure(View.java:17970)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5710)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:465)
at android.view.View.measure(View.java:17970)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5710)
at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1723)
at android.widget.LinearLayout.measureVertical(LinearLayout.java:785)
at android.widget.LinearLayout.onMeasure(LinearLayout.java:654)
at android.view.View.measure(View.java:17970)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5710)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:465)
at com.android.internal.policy.impl.PhoneWindow$DecorView.onMeasure(PhoneWindow.java:2755)
at android.view.View.measure(View.java:17970)
at android.view.ViewRootImpl.performMeasure(ViewRootImpl.java:2438)
at android.view.ViewRootImpl.measureHierarchy(ViewRootImpl.java:1418)
at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1642)
at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1296)
at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:6742)
at android.view.Choreographer$CallbackRecord.run(Choreographer.java:826)
at android.view.Choreographer.doCallbacks(Choreographer.java:629)
at android.view.Choreographer.doFrame(Choreographer.java:597)
at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:812)
at android.os.Handler.handleCallback(Handler.java:815)
at android.os.Handler.dispatchMessage(Handler.java:104)
at android.os.Looper.loop(Looper.java:194)
at android.app.ActivityThread.main(ActivityThread.java:5929)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:987)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:782)
Caused by: java.lang.UnsupportedOperationException: Can't convert to dimension: type=0x3
at android.content.res.TypedArray.getDimensionPixelSize(TypedArray.java:604)
at android.view.View.<init>(View.java:3804)
at android.widget.TextView.<init>(TextView.java:685)
at android.widget.TextView.<init>(TextView.java:680)
at android.widget.TextView.<init>(TextView.java:676)
at java.lang.reflect.Constructor.newInstance(Native Method)
at java.lang.reflect.Constructor.newInstance(Constructor.java:288)
at android.view.LayoutInflater.createView(LayoutInflater.java:626)
at com.android.internal.policy.impl.PhoneLayoutInflater.onCreateView(PhoneLayoutInflater.java:55)
at com.android.internal.policy.impl.HwPhoneLayoutInflater.onCreateView(HwPhoneLayoutInflater.java:75)
at android.view.LayoutInflater.onCreateView(LayoutInflater.java:701)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:760)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:825)
at android.view.LayoutInflater.inflate(LayoutInflater.java:523)
at android.view.LayoutInflater.inflate(LayoutInflater.java:425)
at android.widget.ArrayAdapter.createViewFromResource(ArrayAdapter.java:371)
at android.widget.ArrayAdapter.getView(ArrayAdapter.java:362)
at android.widget.AbsListView.obtainView(AbsListView.java:2481)
at android.widget.ListView.measureHeightOfChildren(ListView.java:1289)
at android.widget.ListView.onMeasure(ListView.java:1197)
at android.view.View.measure(View.java:17970)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5710)
at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1723)
at android.widget.LinearLayout.measureVertical(LinearLayout.java:785)
at android.widget.LinearLayout.onMeasure(LinearLayout.java:654)
at android.view.View.measure(View.java:17970)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5710)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:465)
at android.view.View.measure(View.java:17970)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5710)
at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1723)
at android.widget.LinearLayout.measureVertical(LinearLayout.java:785)
at android.widget.LinearLayout.onMeasure(LinearLayout.java:654)
at android.view.View.measure(View.java:17970)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5710)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:465)
at com.android.internal.policy.impl.PhoneWindow$DecorView.onMeasure(PhoneWindow.java:2755)
at android.view.View.measure(View.java:17970)
at android.view.ViewRootImpl.performMeasure(ViewRootImpl.java:2438)
at android.view.ViewRootImpl.measureHierarchy(ViewRootImpl.java:1418)
at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1642)
at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1296)
at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:6742)
at android.view.Choreographer$CallbackRecord.run(Choreographer.java:826)
at android.view.Choreographer.doCallbacks(Choreographer.java:629)
at android.view.Choreographer.doFrame(Choreographer.java:597)
at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:812)
at android.os.Handler.handleCallback(Handler.java:815)
at android.os.Handler.dispatchMessage(Handler.java:104)
at android.os.Looper.loop(Looper.java:194)
at android.app.ActivityThread.main(ActivityThread.java:5929)
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:987)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:782)
11-08 10:01:59.277 3676-3676/com.example.listview\u测试E/AndroidRuntime:致命异常：main
进程：com.example.listview_test，PID:3676
android.view.InflateException:二进制XML文件行#7:膨胀类android.widget.TextView时出错
位于android.view.LayoutInflater.createView（LayoutInflater.java:652）
在com.android.internal.policy.impl.PhoneLayoutInflater.onCreateView（PhoneLayoutInflater.java:55）上
位于com.android.internal.policy.impl.hwPhoneLayoutFlater.onCreateView（hwPhoneLayoutFlater.java:75）
位于android.view.LayoutInflater.onCreateView（LayoutInflater.java:701）
位于android.view.LayoutInflater.createViewFromTag（LayoutInflater.java:760）
位于android.view.LayoutInflater.rInflate（LayoutInflater.java:825）
在android.view.LayoutInflater.充气（LayoutInflater.java:523）
在android.view.LayoutInflater.充气（LayoutInflater.java:425）
位于android.widget.ArrayAdapter.createViewFromResource（ArrayAdapter.java:371）
在android.widget.ArrayAdapter.getView（ArrayAdapter.java:362）中
在android.widget.AbsListView.obtainView（AbsListView.java:2481）
在android.widget.ListView.measureHeightOChildren（ListView.java:1289）上
在android.widget.ListView.onMeasure（ListView.java:1197）上
在android.view.view.measure（view.java:17970）
位于android.view.ViewGroup.measureChildWithMargins（ViewGroup.java:5710）
位于android.widget.LinearLayout.measureChildBeforeLayout（LinearLayout.java:1723）
位于android.widget.LinearLayout.measureVertical（LinearLayout.java:785）
位于android.widget.LinearLayout.onMeasure（LinearLayout.java:654）
在android.view.view.measure（view.java:17970）
位于android.view.ViewGroup.measureChildWithMargins（ViewGroup.java:5710）
位于android.widget.FrameLayout.onMeasure（FrameLayout.java:465）
在android.view.view.measure（view.java:17970）
位于android.view.ViewGroup.measureChildWithMargins（ViewGroup.java:5710）
位于android.widget.LinearLayout.measureChildBeforeLayout（LinearLayout.java:1723）
位于android.widget.LinearLayout.measureVertical（LinearLayout.java:785）
位于android.widget.LinearLayout.onMeasure（LinearLayout.java:654）
在android.view.view.measure（view.java:17970）
位于android.view.ViewGroup.measureChildWithMargins（ViewGroup.java:5710）
位于android.widget.FrameLayout.onMeasure（FrameLayout.java:465）
在com.android.internal.policy.impl.PhoneWindow$DecorView.onMeasure上（PhoneWindow.java:2755）
在android.view.view.measure（view.java:17970）
在android.view.ViewRootImpl.performMeasure上（ViewRootImpl.java:2438）
在android.view.ViewRootImpl.measureHierarchy（ViewRootImpl.java:1418）
在android.view.ViewRootImpl.performTraversals上（ViewRootImpl.java:1642）
位于android.view.ViewRootImpl.doTraversal（ViewRootImpl.java:1296）
在android.view.ViewRootImpl$TraversalRunnable.run（ViewRootImpl.java:6742）
在android.view.Choreographer$CallbackRecord.run（Choreographer.java:826）
位于android.view.Choreographer.doCallbacks（Choreographer.java:629）
位于android.view.Choreographer.doFrame（Choreographer.java:597）
在android.view.Choreographer$FrameDisplayEventReceiver.run（Choreographer.java:812）上
位于android.os.Handler.handleCallback（Handler.java:815）
位于android.os.Handler.dispatchMessage（Handler.java:104）
位于android.os.Looper.loop（Looper.java:194）
位于android.app.ActivityThread.main（ActivityThread.java:5929）
位于java.lang.reflect.Method.invoke（本机方法）
位于java.lang.reflect.Method.invoke（Method.java:372）
在com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run（ZygoteInit.java:987）上
位于com.android.internal.os.ZygoteInit.main（ZygoteInit.java:782）
原因：java.lang.reflect.InvocationTargetException
位于java.lang.reflect.Constructor.newInstance（本机方法）
位于java.lang.reflect.Constructor.newInstance（Constructor.java:288）
位于android.view.LayoutInflater.createView（LayoutInflater.java:626）
在com.android.internal.policy.impl.PhoneLayoutInflater.onCreateView（PhoneLayoutInflater.java:55）上
位于com.android.internal.policy.impl.hwPhoneLayoutFlater.onCreateView（hwPhoneLayoutFlater.java:75）
位于android.view.LayoutInflater.onCreateView（LayoutInflater.java:701）
位于android.view.LayoutInflater.createViewFromTag（LayoutInflater.java:760）
位于android.view.LayoutInflater.rInflate（LayoutInflater.java:825）
在android.view.LayoutInflater.充气（LayoutInflater.java:523）
在android.view.LayoutInflater.充气（LayoutInflater.java:425）
在android.widget.ArrayAdapter.c
<TextView
android:id="@+id/textView"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_gravity="center"
<!-- modify below line like below -->
android:padding="5dp"
/>
`android:padding="any numeric value dp"`