我有一個由BaseExpandableListAdapter支持的ExpandableListView。子列表項是所有複選框。爲什麼摺疊ExpandableListView組取消選中我的CheckBoxes?
我展開一個組,選中一個複選框,然後摺疊該組。該複選框然後未選中。
我的日誌輸出是:
-- I check the checkbox:
02-27 13:51:29.674: D/ExpandableListAdapter(3583): Option '2' CHECKED
--- I collapse the group, which unchecks the checkbox:
02-27 13:51:30.850: D/ExpandableListAdapter(3583): Option '2' UNCHECKED
正如你可以看到,倒塌一組調用(可能是間接的)我在該組中所有的複選框的OnCheckedChangedListener。
我的代碼是:
public class TestExpandableListActivity extends Activity {
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
ExpandableListView elv =
(ExpandableListView) findViewById(R.id.optionsELV);
ExpandableListAdapter ela = new ExpandableListAdapter(this);
elv.setAdapter(ela);
}
public class ExpandableListAdapter extends BaseExpandableListAdapter {
private static final String TAG = "ExpandableListAdapter";
private final String[] groups;
private final String[][] children;
private final boolean[][] childrenChecked;
private final Context context;
public ExpandableListAdapter(Context c) {
this.context = c;
groups = new String[] { "Options A", "Options B" };
children =
new String[][] {{"A", "B", "C"},{"1", "2", "3"}};
childrenChecked =
new boolean[][] {{false, false, false},{false, false, false}};
}
public View getChildView(
final int groupPos,
final int childPos,
boolean isLastChild,
View convertView,
ViewGroup parent) {
CheckBox cb = new CheckBox(context);
cb.setText(children[groupPos][childPos]);
cb.setChecked(childrenChecked[groupPos][childPos]);
cb.setOnCheckedChangeListener(new OnCheckedChangeListener() {
public void onCheckedChanged(
CompoundButton buttonView,
boolean isChecked) {
Log.d(TAG,
String.format("Option '%s' %s",
children[groupPos][childPos],
isChecked ? "CHECKED" : "UNCHECKED"));
childrenChecked[groupPos][childPos] = isChecked;
}
});
return cb;
}
public int getGroupCount() {
return groups.length;
}
public int getChildrenCount(int groupPos) {
return children[groupPos].length;
}
public String getGroup(int groupPos) {
return groups[groupPos];
}
public String getChild(int groupPos, int childPos) {
return children[groupPos][childPos];
}
public long getGroupId(int groupPos) {
return (1024 * (groupPos + 1));
}
public long getChildId(int groupPos, int childPos) {
return (1024 * (groupPos + 1)) + (childPos + 1);
}
public View getGroupView(
int groupPos,
boolean isExpanded,
View convertView,
ViewGroup parent) {
TextView tv = new TextView(context);
tv.setText(groups[groupPos]);
return tv;
}
public boolean hasStableIds() {
return true;
}
public boolean isChildSelectable(int groupPos, int childPos) {
return true;
}
}
}
我的佈局(請注意,我正確設置choiceMode以選擇題)是:
<?xml version="1.0" encoding="utf-8"?>
<ExpandableListView
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/optionsELV"
android:choiceMode="multipleChoice"
android:layout_width="fill_parent"
android:layout_height="fill_parent" />
爲什麼倒塌一組取消選中所有的複選框?我怎樣才能防止這種情況發生?
即使在檢查的文本視圖討厭,你有沒有遇到這樣的問題呢? – Harshit 2014-02-08 20:21:03