Listview 错误:“您的内容必须有一个 ListView,其 id 属性为 'android.R.id.list'"; [英] Listview error: "Your content must have a ListView whose id attribute is 'android.R.id.list'"
问题描述
我的 logcat 中出现错误,提示您的内容必须有一个 id 属性为 'android.R.id.list' 的 ListView".我的代码编译并运行,但当我开始我的 listview 活动时强制关闭.我查了很多类似的问题,这似乎是一个常见问题,但我仍然无法修复我的代码.
I am getting an error in my logcat saying "Your content must have a ListView whose id attribute is 'android.R.id.list'". My code compiles and runs but force closes when I start my listview activity. I've checked on many similar questions, it seems to be a common problem but I am still unable to fix my code.
声明:
private ListView lv;
Context mContext;
List mList;
String[] testcontacts;
MessageView aa = null;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.firstlist);
testcontacts = getResources()
.getStringArray(R.array.testcontacts_array);
aa = new MessageView();
lv = getListView();/*(ListView) lv.findViewById(R.id.list); Had to comment out, it cannot find list*/
lv.setAdapter(aa);
lv.setTextFilterEnabled(true);
lv.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
// When clicked, show a toast with the TextView text
Toast.makeText(getApplicationContext(),
((TextView) view).getText(), Toast.LENGTH_SHORT).show();
}
});
}
class MessageView extends ArrayAdapter<String> {
MessageView() {
super(FirstLoginActivity.this, android.R.layout.activity_list_item,
testcontacts);
// TODO Auto-generated constructor stub
}
public View getView(int position, View convertview, ViewGroup parent) {
Log.d("Ebz", "inside getView method");
ViewHolder holder;
View v = convertview;
if (v == null) {
Log.d("Ebz", "if v == null");
LayoutInflater inflater = getLayoutInflater();
v = inflater.inflate(R.layout.list_items, null);
holder = new ViewHolder();
holder.firstLine = (TextView) v.findViewById(R.id.firstLine);
holder.secondLine = (TextView) v.findViewById(R.id.secondLine);
holder.icon1 = (ImageView) v.findViewById(R.id.icon1);
holder.icon2 = (ImageView) v.findViewById(R.id.icon2);
v.setTag(holder);
} else {
holder = (ViewHolder) v.getTag();
}
holder.firstLine.setText(testcontacts[position]);
holder.secondLine.setText(testcontacts[position]);
holder.icon1.setImageBitmap(null);
holder.icon2.setImageBitmap(null);
// call the images directly?
return v;
}
class ViewHolder {
TextView firstLine;
TextView secondLine;
ImageView icon1;
ImageView icon2;
}
}
}
我的 XML
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical" >
<RelativeLayout
android:id="@+id/top_control_bar"
android:layout_width="fill_parent"
android:layout_height="wrap_content" >
<TextView
android:id="@+id/textView1"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="10dp"
android:layout_weight="1"
android:background="#cc252a"
android:paddingBottom="10dp"
android:paddingLeft="10dp"
android:paddingTop="10dp"
android:text="This will be Changed"
android:textAppearance="?android:attr/textAppearanceLarge" />
</RelativeLayout>
<LinearLayout
android:id="@+id/bottom_control_bar"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true" >
</LinearLayout>
<ListView
android:id="@+id/list"
android:layout_width="fill_parent"
android:layout_height="0dip"
android:layout_above="@id/bottom_control_bar"
android:layout_below="@id/top_control_bar"
android:choiceMode="multipleChoice" />
</RelativeLayout>
我的列表项:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical" >
<RelativeLayout
android:id="@+id/top_control_bar"
android:layout_width="fill_parent"
android:layout_height="wrap_content" >
<TextView
android:id="@+id/textView1"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="10dp"
android:layout_weight="1"
android:background="#cc252a"
android:paddingBottom="10dp"
android:paddingLeft="10dp"
android:paddingTop="10dp"
android:text="This will be Changed"
android:textAppearance="?android:attr/textAppearanceLarge" />
</RelativeLayout>
<LinearLayout
android:id="@+id/bottom_control_bar"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true" >
</LinearLayout>
<ListView
android:id="@+id/list"
android:layout_width="fill_parent"
android:layout_height="0dip"
android:layout_above="@id/bottom_control_bar"
android:layout_below="@id/top_control_bar"
android:choiceMode="multipleChoice"
android:divider="#cc252a"
android:dividerHeight="14.5dp" />
</RelativeLayout>
推荐答案
您可能正在使用 ListActivity.
You are probably using a ListActivity.
在你的 firstlist.xml 中将 id 替换为:
In you firstlist.xml replace the id to:
<ListView
android:id="@android:id/list"
...
ListActivity 查找 id R.android.id.list,您在 xml 中为 @android:id/list.
ListActivity looks for the id R.android.id.list which you in xml is @android:id/list.
另看这篇文章:ListView 的 id 属性为 'android.R.id.list' 当我正确设置 ListView id 时出错
这篇关于Listview 错误:“您的内容必须有一个 ListView,其 id 属性为 'android.R.id.list'";的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!