为啥我的 ListView 使我的应用程序崩溃而不是列出我的条目？
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【中文标题】为啥我的 ListView 使我的应用程序崩溃而不是列出我的条目？【英文标题】：Why does my ListView crash my app instead of listing my Entries?为什么我的 ListView 使我的应用程序崩溃而不是列出我的条目？ 【发布时间】：2020-03-04 21:19:44 【问题描述】：我是一名 android 初学者，我一起复制了一些代码来获得我的第一个简单的 ListView。 但它不起作用。它没有工作，而是使我的应用程序崩溃。 非常感谢您帮助我的 ListView 正确工作，谢谢。
MainActivity.java：
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);
activity_main.xml：
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_
android:layout_
android:orientation="vertical">
<ListView
android:id="@+id/simpleListView"
android:layout_
android:layout_
android:divider="@color/material_blue_grey_800"
android:dividerHeight="1dp" />
</LinearLayout>
activity_listview.xml：
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_
android:layout_
android:orientation="vertical">
<TextView
android:id="@+id/textView"
android:layout_
android:layout_
android:layout_gravity="center"
android:padding="@mipmap/ic_launcher" />
</LinearLayout>
错误日志
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)
【问题讨论】：
分享错误日志.. 当你的应用程序崩溃时，你的第一个反应——是的，在 *** 上发布之前——是检查 Logcat 看看发生了什么 尝试删除android:padding="@mipmap/ic_launcher"。如果你想使用padding，那么你可以试试android:padding="8dp"。
删除 android:padding="@mipmap/ic_launcher" 使 ListView 工作。它几乎没有格式化，但它是一个 ListView。非常感谢....
行 android:padding="@mipmap/ic_launcher" 导致崩溃，用一些数值更新填充。会解决问题的
【参考方案1】：
android:padding="@mipmap/ic_launcher"
您的 activity_listView.xml 中的这一行导致错误。
`android:padding="any numeric value dp"`
前android:padding="5dp"
从 padding 属性中删除 @mipmap/ic_launcher 并按上述方法添加。
【讨论】：
谁能告诉我，我可以在错误日志的哪个位置看到崩溃的错误是什么？ 二进制 XML 文件第 7 行：错误膨胀类 android.widget.TextView。您的错误表明您在第 1 行的 XML 文件中存在问题。 7关于定义TextView。由于您在TextView中输入了错误的属性，这就是它在TextView中显示错误的原因。只需阅读错误日志的前两行，他们提到了错误的原因和位置。 另外，尝试了解所有视图的所有重要属性及其值。每个视图都有一些常用的属性。有很多教程可以让你理解它们。【参考方案2】：在您的activity_listview 中更改您的padding 的TextView 值，如下所示
<TextView
android:id="@+id/textView"
android:layout_
android:layout_
android:layout_gravity="center"
<!-- modify below line like below -->
android:padding="5dp"
/>
【讨论】：
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