我正在填充列表视图以在 tabwidget 中进行搜索。我的列表包含图像和文本视图。没有 TabWidget 它可以正常工作,但在 TabWidget 中它会给出错误。我在 getview 中有错误我的位置是
08-07 16:24:44.300: E/AndroidRuntime(20166): FATAL EXCEPTION: main
08-07 16:24:44.300: E/AndroidRuntime(20166): java.lang.NullPointerException
08-07 16:24:44.300: E/AndroidRuntime(20166): at com.example.project.SearchDictionaryActivity$MyCustomAdapter.getView(SearchDictionaryActivity.java:392)
08-07 16:24:44.300: E/AndroidRuntime(20166): at android.widget.AbsListView.obtainView(AbsListView.java:2485)
08-07 16:24:44.300: E/AndroidRuntime(20166): at android.widget.ListView.measureHeightOfChildren(ListView.java:1250)
08-07 16:24:44.300: E/AndroidRuntime(20166): at android.widget.ListView.onMeasure(ListView.java:1161)
08-07 16:24:44.300: E/AndroidRuntime(20166): at android.view.View.measure(View.java:12842)
08-07 16:24:44.300: E/AndroidRuntime(20166): at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:4712)
08-07 16:24:44.300: E/AndroidRuntime(20166): at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1385)
08-07 16:24:44.300: E/AndroidRuntime(20166): at android.widget.LinearLayout.measureVertical(LinearLayout.java:670)
08-07 16:24:44.300: E/AndroidRuntime(20166): at android.widget.LinearLayout.onMeasure(LinearLayout.java:563)
08-07 16:24:44.300: E/AndroidRuntime(20166): at android.view.View.measure(View.java:12842)
08-07 16:24:44.300: E/AndroidRuntime(20166): at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:4712)
08-07 16:24:44.300: E/AndroidRuntime(20166): at android.widget.FrameLayout.onMeasure(FrameLayout.java:293)
08-07 16:24:44.300: E/AndroidRuntime(20166): at android.view.View.measure(View.java:12842)
08-07 16:24:44.300: E/AndroidRuntime(20166): at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:4712)
08-07 16:24:44.300: E/AndroidRuntime(20166): at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1385)
08-07 16:24:44.300: E/AndroidRuntime(20166): at android.widget.LinearLayout.measureVertical(LinearLayout.java:670)
08-07 16:24:44.300: E/AndroidRuntime(20166): at android.widget.LinearLayout.onMeasure(LinearLayout.java:563)
08-07 16:24:44.300: E/AndroidRuntime(20166): at android.view.View.measure(View.java:12842)
08-07 16:24:44.300: E/AndroidRuntime(20166): at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:4712)
08-07 16:24:44.300: E/AndroidRuntime(20166): at android.widget.FrameLayout.onMeasure(FrameLayout.java:293)
08-07 16:24:44.300: E/AndroidRuntime(20166): at com.android.internal.policy.impl.PhoneWindow$DecorView.onMeasure(PhoneWindow.java:2242)
08-07 16:24:44.300: E/AndroidRuntime(20166): at android.view.View.measure(View.java:12842)
08-07 16:24:44.300: E/AndroidRuntime(20166): at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:4712)
08-07 16:24:44.300: E/AndroidRuntime(20166): at android.widget.FrameLayout.onMeasure(FrameLayout.java:293)
08-07 16:24:44.300: E/AndroidRuntime(20166): at android.view.View.measure(View.java:12842)
08-07 16:24:44.300: E/AndroidRuntime(20166): at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:4712)
08-07 16:24:44.300: E/AndroidRuntime(20166): at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1385)
08-07 16:24:44.300: E/AndroidRuntime(20166): at android.widget.LinearLayout.measureVertical(LinearLayout.java:670)
08-07 16:24:44.300: E/AndroidRuntime(20166): at android.widget.LinearLayout.onMeasure(LinearLayout.java:563)
08-07 16:24:44.300: E/AndroidRuntime(20166): at android.view.View.measure(View.java:12842)
08-07 16:24:44.300: E/AndroidRuntime(20166): at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:4712)
08-07 16:24:44.300: E/AndroidRuntime(20166): at android.widget.FrameLayout.onMeasure(FrameLayout.java:293)
08-07 16:24:44.300: E/AndroidRuntime(20166): at android.view.View.measure(View.java:12842)
08-07 16:24:44.300: E/AndroidRuntime(20166): at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:4712)
08-07 16:24:44.300: E/AndroidRuntime(20166): at android.widget.FrameLayout.onMeasure(FrameLayout.java:293)
08-07 16:24:44.300: E/AndroidRuntime(20166): at android.view.View.measure(View.java:12842)
08-07 16:24:44.300: E/AndroidRuntime(20166): at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:4712)
08-07 16:24:44.300: E/AndroidRuntime(20166): at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1385)
08-07 16:24:44.300: E/AndroidRuntime(20166): at android.widget.LinearLayout.measureVertical(LinearLayout.java:670)
08-07 16:24:44.300: E/AndroidRuntime(20166): at android.widget.LinearLayout.onMeasure(LinearLayout.java:563)
08-07 16:24:44.300: E/AndroidRuntime(20166): at android.view.View.measure(View.java:12842)
08-07 16:24:44.300: E/AndroidRuntime(20166): at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:4712)
08-07 16:24:44.300: E/AndroidRuntime(20166): at android.widget.FrameLayout.onMeasure(FrameLayout.java:293)
08-07 16:24:44.300: E/AndroidRuntime(20166): at com.android.internal.policy.impl.PhoneWindow$DecorView.onMeasure(PhoneWindow.java:2242)
08-07 16:24:44.300: E/AndroidRuntime(20166): at android.view.View.measure(View.java:12842)
08-07 16:24:44.300: E/AndroidRuntime(20166): at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1240)
08-07 16:24:44.300: E/AndroidRuntime(20166): at android.view.ViewRootImpl.handleMessage(ViewRootImpl.java:2632)
08-07 16:24:44.300: E/AndroidRuntime(20166): at android.os.Handler.dispatchMessage(Handler.java:99)
08-07 16:24:44.300: E/AndroidRuntime(20166): at android.os.Looper.loop(Looper.java:137)
08-07 16:24:44.300: E/AndroidRuntime(20166): at android.app.ActivityThread.main(ActivityThread.java:4517)
08-07 16:24:44.300: E/AndroidRuntime(20166): at java.lang.reflect.Method.invokeNative(Native Method)
08-07 16:24:44.300: E/AndroidRuntime(20166): at java.lang.reflect.Method.invoke(Method.java:511)
08-07 16:24:44.300: E/AndroidRuntime(20166): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:993)
08-07 16:24:44.300: E/AndroidRuntime(20166): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:760)
08-07 16:24:44.300: E/AndroidRuntime(20166): at dalvik.system.NativeStart.main(Native Method)
我的 search_dictionary_item_item.xml 是
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:gravity="left|center"
android:paddingBottom="5dp"
android:paddingLeft="5dp"
android:paddingTop="10dp" >
<ImageView
android:id="@+id/ImageView01"
android:layout_width="50dp"
android:layout_height="60dp" >
</ImageView>
<TextView
android:id="@+id/TextView01"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="10dp"
android:textColor="#0099CC"
android:textSize="20dp"
android:textStyle="bold" >
</TextView>
</LinearLayout>
我的第392行是
at com.example.project.SearchDictionaryActivity$MyCustomAdapter.getView(SearchDictionaryActivity.java:392)
是
TextView textview = (TextView) row.findViewById(R.id.TextView01);
我尝试了 2 个建议
1.
public View getView(int position, View convertView, ViewGroup parent)
{
View row=convertView;
Context c = null;
if(convertView==null){
LayoutInflater inflater = getLayoutInflater(null);
row = inflater.inflate(R.layout.search_dictionary_item_item, parent, false);
}
TextView textview = (TextView) row.findViewById(R.id.TextView01);
ImageView imageview = (ImageView) row.findViewById(R.id.ImageView01);
textview.setText(data_text[position]);
imageview.setImageBitmap(data_image[position]);
return (row);
}
用于放置 null getLayoutInflater(null); 我明白了
The method getLayoutInflater() in the type Activity is not applicable for the arguments (null)
2.建议
public View getView(int position, View convertView, ViewGroup parent)
{
// LayoutInflater inflater = getLayoutInflater();
View row;
LayoutInflater inflater = (LayoutInflater) convertView.getContext().getSystemService( Context.LAYOUT_INFLATER_SERVICE );
row = inflater.inflate(R.layout.search_dictionary_item_item, parent, false);
TextView textview = (TextView) row.findViewById(R.id.TextView01);
ImageView imageview = (ImageView) row.findViewById(R.id.ImageView01);
textview.setText(data_text[position]);
imageview.setImageBitmap(data_image[position]);
return (row);
}
两者都不适用于上面给出的 Logcat