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具有自定义样式的TextView导致奇怪的膨胀异常

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我正在开发一个Android项目,我正在创建一个自定义列表视图 . 列表视图包含多个文本视图,我正在为我的文本视图创建一个样式,所以我不必一遍又一遍地复制相同的样式 .

下面是我的布局

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="horizontal"
    android:layout_width="match_parent"
    android:layout_height="wrap_content">
    <TextView android:id="@+id/txtFirstOccurred"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        style="@style/CrashGroup"/>

    <TextView android:id="@+id/txtLastOccurred"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        style="@style/CrashGroup"/>
</LinearLayout>

以下是我的textview样式

<style name="CrashGroup">
        <item name="android:singleLine">false</item>
        <item name="android:textSize">@android:style/TextAppearance.Small</item>
        <item name="android:gravity">center_vertical</item>
    </style>

下面是我如何膨胀我的XML以显示在我的列表视图上 .

@Override
    public View getView(int position, View convertView, ViewGroup parent)
    {
        try
        {
            convertView = LayoutInflater.from(getContext()).inflate(R.layout.android_crash_group_layout, null);

            TextView txtFirstOccurred = (TextView)convertView.findViewById(R.id.txtFirstOccurred);
            txtFirstOccurred.setText(getItem(position).getFirstOccurred());

            TextView txtLastOccurred = (TextView)convertView.findViewById(R.id.txtLastOccurred);
            txtLastOccurred.setText(getItem(position).getLastOccurred());


            return convertView;
        }
        catch (Exception ex)
        {
            Log.e(TAG, ex.toString());
            return null;
        }
    }

我得到的错误是:

进程:com.BoardiesITSolutions.CritiMonApp,PID:1451 java.lang.NullPointerException:尝试在android.widget.AbsListView.obtainView(AbsListView)上的空对象引用上调用虚方法'int android.view.View.getImportantForAccessibility()' .java:2360)在android.widget.List.fillFromTop(ListView.java:759)的android.widget.ListView.fillDown(ListView.java:698)的android.widget.ListView.makeAndAddView(ListView.java:1864)在android.view上的android.widget.AtListView.onLayout(AbsListView.java:2148)的android.widget.List.layoutChildren(ListView.java:1673)处于android.view上的android.view.View.layout(View.java:15596) . 位于android.widget.LinearLayout.onLayout(LinearLayout)的android.widget.LinearLayout.setoutVertical(LinearLayout.java:1557)上的android.widget.LinearLayout.setChildFrame(LinearLayout.java:1703)中的ViewGroup.layout(ViewGroup.java:4966) .java:1466)在Android.widget.LinearLayout的android.view.View.layout(ViewGroup.java:4966)的android.view.View.layout(View.java:15596) . setChildFrame(LinearLayout.java:1703)位于Android.widget.Line中的android.widget.LinearLayout.onoutVayical(LinearLayout.java:1557),android.view.Layout.Layout.Layout :15596)在Android.widget.FrameLayout.layoutChildren(FrameLayout.java:573)的android.view.FreeLayout.onLayout(FrameLayout.java:508)android.view.ViewGroup.layout(ViewGroup.java:4966)位于android.widget.FoutLayout的android.widget.FrameLayout.layoutChildren(FrameLayout.java:573)的android.view.ViewGroup.layout(ViewGroup.java:4966)的.view.View.layout(View.java:15596) . onLayout(FrameLayout.java:508)在android.view.Viewout.Loutout.setChildFrame(LinearLayout.java :1703)在android.widget.LinearLayout.onoutVertical(LinearLayout.java:1557)的android.widget.LinearLayout.onLayout(LinearLayout.java:1466)在android.view.View.layout(View.java:15596)在android .view.ViewGroup.l ayout(ViewGroup.java:4966)位于android.view.ViewGroup.layout的android.view.View.layout(View.java:15596)的android.support.v4.widget.DrawerLayout.onLayout(DrawerLayout.java:890) (ViewGroup.java:4966)android.widget.FrameLayout.layout中的android.widget.FrameLayout.layoutChildren(FrameLayout.java:573)(androidLayout.java:508)在android.view.View.layout(View.java: 15596)在Android.widget.FrameLayout.onLayout(FrameLayout.java:508)的android.widget.FrameLayout.layoutChildren(FrameLayout.java:573)上的android.view.ViewGroup.layout(ViewGroup.java:4966) . 在Android.widget.FrameLayout.onLayout的android.widget.FrameLayout.layoutChildren(FrameLayout.java:573)的android.view.ViewGroup.layout(ViewGroup.java:4966)上的view.View.layout(View.java:15596) (FrameLayout.java:508)在android.view.Loutout.setChildFrame(androidLayout.java)上的android.view.View.layout(ViewGroup.java:4966)的android.view.View.layout(View.java:15596)处 . (LinearLayout.java: 1703)在android.widget.LinearLayout.layoutVertical(Line arLayout.java:1557)在Android.view.Loutout(DirectLayout.java:1466)的android.view.View.layout(View.java:15596)android.view.ViewGroup.layout(ViewGroup.java:4966)上的android.widget.LinearLayout.onLayout(LinearLayout.java:1466) )android.widget.FrameLayout.layoutChildren(FrameLayout.java:573)在android.view.fallLayout.onLayout(FrameLayout.java:508)android.view.layout(View.java:15596)android.view .ViewGroup.layout(ViewGroup.java:4966)位于android.view.ViewRootImpl.adTraversals(ViewRootImpl.java:182)上的android.view.ViewRootImpl.performLayout(ViewRootImpl.java:2072),位于android.view.ViewRootImpl.doTraversal( ViewRootImpl.java:1054)在Android.view.ChoreIs上运行android.view.ViewRootImpl $ TraversalRunnable.run(ViewRootImpl.java:5779)在android.view.Choreographer $ CallbackRecord.run(Choreographer.java:767),在android.view.Choreographer.doCallbacks(Choreographer) .java:580)在android.view.Choreographer $ FrameDisplayEventReceiver.run(Choreographer.java:753)的android.view.Choreographer.doFrame(Choreographer.java:550)

这似乎与样式有关,好像我从文本视图中删除了这个样式属性似乎工作正常 .

感谢您的任何帮助,您可以提供 .

2 回答

  • 0

    我认为你回来的 convertView 有时是 null ,因为处理convertView很棘手 .

    确保你有 Value . 你可以使用像:

    @Override
      public View getView(int position, View convertView, ViewGroup parent) {
        LayoutInflater inflater = (LayoutInflater) context
            .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        TextView text = null;
    
        if (convertView == null) {
          convertView = inflater.inflate(R.layout.listrow_details, null);
        }
    
        text = (TextView) convertView.findViewById(R.id.textView1);
        text.setText(children);
    
        return convertView;
      }
    

    希望能帮助到你 .

  • 3

    android:textSize必须是维度值所以改变你的风格,

    <style name="CrashGroup" parent="@android:style/TextAppearance.Small">
            <item name="android:singleLine">false</item>
            <item name="android:gravity">center_vertical</item>
        </style>
    

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