Android 为什么折叠ExpandableListView组会取消选中我的复选框？
我有一个由BaseExpandableListAdapter支持的ExpandableListView。子列表项都是复选框 我展开一个组，选中复选框，然后折叠该组。然后取消选中该复选框 我的日志输出是：Android 为什么折叠ExpandableListView组会取消选中我的复选框？,android,android-listview,Android,Android Listview,我有一个由BaseExpandableListAdapter支持的ExpandableListView。子列表项都是复选框 我展开一个组，选中复选框，然后折叠该组。然后取消选中该复选框 我的日志输出是： -- I check the checkbox: 02-27 13:51:29.674: D/ExpandableListAdapter(3583): Option '2' CHECKED --- I collapse the group, which unchecks the checkbox
-- 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
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;
}
}
}
为什么折叠组会取消选中我的所有复选框？如何防止这种情况发生？我想我已经找到了解决方案-使用CheckedTextView而不是复选框
public View getChildView(
final int groupPos,
final int childPos,
boolean isLastChild,
View convertView,
ViewGroup parent) {
final CheckedTextView ctv = new CheckedTextView(context);
ctv.setChecked(childrenChecked[groupPos][childPos]);
ctv.setCheckMarkDrawable(
ctv.isChecked()
? android.R.drawable.checkbox_on_background
: android.R.drawable.checkbox_off_background);
ctv.setText(children[groupPos][childPos]);
ctv.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
ctv.toggle();
Log.d(TAG,
String.format("Option '%s' %s",
children[groupPos][childPos],
ctv.isChecked() ? "CHECKED" : "UNCHECKED"));
childrenChecked[groupPos][childPos] = ctv.isChecked();
ctv.setCheckMarkDrawable(
ctv.isChecked()
? android.R.drawable.checkbox_on_background
: android.R.drawable.checkbox_off_background);
}
});
return ctv;
}
有谁能告诉我CheckBox和CheckedTextView之间的区别，以及为什么CheckBox在ExpandableListView中的功能如此奇怪？我想我找到了解决方案-使用CheckedTextView而不是CheckBox
public View getChildView(
final int groupPos,
final int childPos,
boolean isLastChild,
View convertView,
ViewGroup parent) {
final CheckedTextView ctv = new CheckedTextView(context);
ctv.setChecked(childrenChecked[groupPos][childPos]);
ctv.setCheckMarkDrawable(
ctv.isChecked()
? android.R.drawable.checkbox_on_background
: android.R.drawable.checkbox_off_background);
ctv.setText(children[groupPos][childPos]);
ctv.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
ctv.toggle();
Log.d(TAG,
String.format("Option '%s' %s",
children[groupPos][childPos],
ctv.isChecked() ? "CHECKED" : "UNCHECKED"));
childrenChecked[groupPos][childPos] = ctv.isChecked();
ctv.setCheckMarkDrawable(
ctv.isChecked()
? android.R.drawable.checkbox_on_background
: android.R.drawable.checkbox_off_background);
}
});
return ctv;
}
有谁能告诉我复选框和CheckedTextView之间的区别，以及为什么复选框在ExpandableListView中的功能如此奇怪？我也有同样的问题。我无法告诉您原因，但是移动、扩展和折叠ExpandableListView的段有时会导致复选框取消选中 解决这一问题的一种更简单的方法是使用OnClickListener事件for复选框，而不是OnCheckedChange
真烦人我也有同样的问题。我无法告诉您原因，但是移动、扩展和折叠ExpandableListView的段有时会导致复选框取消选中 解决这一问题的一种更简单的方法是使用OnClickListener事件for复选框，而不是OnCheckedChange
即使在选中的文本视图中，如果您折叠或展开文本视图，随机切换列表其余部分的更改，这也很烦人，您是否遇到过此类问题？即使在选中的文本视图中，如果您折叠或展开文本视图，随机切换列表其余部分的更改，您是否遇到过此类问题？