我尝试对膨胀列表视图进行膨胀，但它显示错误就像这样......
01-27 06:37:34.619: E/AndroidRuntime(7522): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.info.wishlist/com.info.wishlistadapter.Expand_list}: java.lang.RuntimeException: Your content must have a ExpandableListView whose id attribute is 'android.R.id.list'
01-27 06:37:34.619: E/AndroidRuntime(7522): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2059)
01-27 06:37:34.619: E/AndroidRuntime(7522): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2084)
01-27 06:37:34.619: E/AndroidRuntime(7522): at android.app.ActivityThread.access$600(ActivityThread.java:130)
01-27 06:37:34.619: E/AndroidRuntime(7522): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1195)
01-27 06:37:34.619: E/AndroidRuntime(7522): at android.os.Handler.dispatchMessage(Handler.java:99)
01-27 06:37:34.619: E/AndroidRuntime(7522): at android.os.Looper.loop(Looper.java:137)
01-27 06:37:34.619: E/AndroidRuntime(7522): at android.app.ActivityThread.main(ActivityThread.java:4745)
01-27 06:37:34.619: E/AndroidRuntime(7522): at java.lang.reflect.Method.invokeNative(Native Method)
01-27 06:37:34.619: E/AndroidRuntime(7522): at java.lang.reflect.Method.invoke(Method.java:511)
01-27 06:37:34.619: E/AndroidRuntime(7522): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786)
01-27 06:37:34.619: E/AndroidRuntime(7522): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
01-27 06:37:34.619: E/AndroidRuntime(7522): at dalvik.system.NativeStart.main(Native Method)
01-27 06:37:34.619: E/AndroidRuntime(7522): Caused by: java.lang.RuntimeException: Your content must have a ExpandableListView whose id attribute is 'android.R.id.list'
01-27 06:37:34.619: E/AndroidRuntime(7522): at android.app.ExpandableListActivity.onContentChanged(ExpandableListActivity.java:222)
01-27 06:37:34.619: E/AndroidRuntime(7522): at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:259)
01-27 06:37:34.619: E/AndroidRuntime(7522): at android.app.Activity.setContentView(Activity.java:1867)
01-27 06:37:34.619: E/AndroidRuntime(7522): at com.info.wishlistadapter.Expand_list.onCreate(Expand_list.java:41)
01-27 06:37:34.619: E/AndroidRuntime(7522): at android.app.Activity.performCreate(Activity.java:5008)
01-27 06:37:34.619: E/AndroidRuntime(7522): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1079)
01-27 06:37:34.619: E/AndroidRuntime(7522): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2023)
01-27 06:37:34.619: E/AndroidRuntime(7522): ... 11 more
这个班级.....
public class Expand_list extends ExpandableListActivity {
ExpandableListAdapter mAdapter;
WishListHelper dbhelper;
SQLiteDatabase db;
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.expand);
dbhelper = new WishListHelper(this);
String URL = "content://com.info.provider.Wish_List_Name/WISH_LIST1";
Uri wishlist = Uri.parse(URL);
ContentResolver cus = getContentResolver();
Cursor c = cus.query(wishlist, null, null, null, null);
mAdapter = new MyExpandableListAdapter(this, c);
setListAdapter(mAdapter);
}
class MyExpandableListAdapter extends BaseExpandableListAdapter {
private Context mContext;
Cursor data;
int add = 0;
String[] array;
ArrayList<String> al = new ArrayList<String>();
public MyExpandableListAdapter(Context context, Cursor c) {
super();
this.mContext = context;
this.data = c;
array = new String[c.getCount() + 2];
int i = 0;
if (data.moveToFirst()) {
do {
String array1 = data.getString(data
.getColumnIndex(Wish_list_Table.COL_CATEGORY));
array[i] = array1;
Log.i("array", "" + array[i]);
Log.i("arrayl", "" + i);
i++;
} while (data.moveToNext());
}
data.close();
grouparray();
// TODO Auto-generated constructor stub
}
private void grouparray() {
int n = data.getCount();
for (int i = 0; i < n; i++) {
if (!al.contains(array[i])) {
al.add(add++, array[i]);
}
}
for (int j = 0; j < add - 1; j++) {
Log.i("al", "" + al.get(j));
}
}
public TextView getGenericView() {
// Layout parameters for the ExpandableListView
AbsListView.LayoutParams lp = new AbsListView.LayoutParams(
ViewGroup.LayoutParams.MATCH_PARENT, 64);
TextView textView = new TextView(Expand_list.this);
textView.setLayoutParams(lp);
// Center the text vertically
textView.setGravity(Gravity.CENTER_VERTICAL | Gravity.LEFT);
// Set the text starting position
textView.setPadding(36, 0, 0, 0);
return textView;
}
@Override
public Object getChild(int arg0, int arg1) {
// TODO Auto-generated method stub
return null;
}
@Override
public long getChildId(int arg0, int arg1) {
// TODO Auto-generated method stub
return 0;
}
@Override
public View getChildView(int groupPosition, int childPosition,
boolean isLastChild, View convertView, ViewGroup parent) {
// TODO Auto-generated method stub
TextView name = (TextView) findViewById(R.id.textView1);
TextView desc = (TextView) findViewById(R.id.edesc);
TextView date = (TextView) findViewById(R.id.edate);
TextView time = (TextView) findViewById(R.id.etime);
CheckBox check = (CheckBox) findViewById(R.id.checkBox1);
Button ebtn = (Button) findViewById(R.id.button1);
db = dbhelper.getReadableDatabase();
String selectSQL = "Select * from " + Wish_list_Table.TABLE_NAME
+ " where " + Wish_list_Table.COL_CATEGORY + " = ?";
String[] add = { "" + al.get(groupPosition) };
TextView textView = getGenericView();
Cursor selectdata = db.rawQuery(selectSQL, add);
if (selectdata.moveToFirst()) {
do {
name.setText(selectdata.getString(selectdata
.getColumnIndex(Wish_list_Table.COL_NAME)));
desc.setText(selectdata.getString(selectdata
.getColumnIndex(Wish_list_Table.COL_DATE)));
date.setText(selectdata.getString(selectdata
.getColumnIndex(Wish_list_Table.COL_DATE)));
time.setText(selectdata.getString(selectdata
.getColumnIndex(Wish_list_Table.COL_TIME)));
ebtn.setText(selectdata.getString(selectdata
.getColumnIndex(Wish_list_Table.COL_CATEGORY)));
} while (selectdata.moveToNext());
}
Log.i("str", "" + selectdata.getCount());
return textView;
}
@Override
public int getChildrenCount(int groupPosition) {
// TODO Auto-generated method stub
Log.i("next", "count");
db = dbhelper.getReadableDatabase();
String selectSQL = "Select * from " + Wish_list_Table.TABLE_NAME
+ " where " + Wish_list_Table.COL_CATEGORY + " = ?";
String[] add = { "" + al.get(groupPosition) };
Cursor selectdata = db.rawQuery(selectSQL, add);
return selectdata.getCount();
}
@Override
public Object getGroup(int groupPosition) {
// TODO Auto-generated method stub
return null;
}
@Override
public int getGroupCount() {
// TODO Auto-generated method stub
return al.size();
}
@Override
public long getGroupId(int groupPosition) {
// TODO Auto-generated method stub
return 0;
}
@Override
public View getGroupView(int groupPosition, boolean isExpanded,
View convertView, ViewGroup parent) {
LayoutInflater inflater = ((Activity) mContext).getLayoutInflater();
View custom = inflater.inflate(R.layout.expanditem, null);
TextView textView = (TextView) findViewById(R.id.explist);
textView.setText("" + al.get(groupPosition));
return custom;
}
@Override
public boolean hasStableIds() {
// TODO Auto-generated method stub
return false;
}
@Override
public boolean isChildSelectable(int groupPosition, int childPosition) {
// TODO Auto-generated method stub
return false;
}
}
}
这是xml文件... 1）expand.xml
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<ExpandableListView
android:id="@+id/expandableListView1"
android:layout_width="match_parent"
android:layout_height="wrap_content" >
</ExpandableListView>
2）expandlist.xml
<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/explist"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:gravity="center|top"
android:text="TextView" />
3）expanditem.xml
<RelativeLayout 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/edesc"
android:layout_width="200dp"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentRight="true"
android:layout_alignParentTop="false"
android:layout_below="@id/textView1"
android:lines="4"
android:paddingTop="4dp"
android:text="Description" />
<Button
android:id="@+id/button1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_above="@+id/edesc"
android:layout_alignParentRight="true"
android:layout_alignParentTop="true"
android:text="Button" />
<CheckBox
android:id="@+id/checkBox1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:text="" />
<TextView
android:id="@+id/textView1"
android:layout_width="200dp"
android:layout_height="30dp"
android:layout_alignBaseline="@+id/checkBox1"
android:layout_alignBottom="@+id/checkBox1"
android:layout_toLeftOf="@+id/button1"
android:gravity="center"
android:text="Name" />
<TextView
android:id="@+id/edate"
android:layout_width="180dp"
android:layout_height="20dp"
android:layout_alignParentLeft="true"
android:layout_below="@+id/edesc"
android:text="Date" />
<TextView
android:id="@+id/etime"
android:layout_width="100dp"
android:layout_height="wrap_content"
android:layout_below="@+id/edesc"
android:layout_toRightOf="@+id/edate"
android:text="Time" />
答案 0 :(得分：1)
Your content must have a ExpandableListView whose id attribute is 'android.R.id.list'
在您的布局中，expand.xml将@+id/expandableListView1更改为@android:id/list
在您的代码中，将R.id.expandableListView1替换为android.R.id.list