androidcheckboxlayoutvisibilitylistadapter
Checkbox doesn't check first time after visibility change from GONE to VISIBLE
I have a CheckBox in my XML layout and its visibility set to GONE. Here is my layout:
<?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:id="@+id/linearLayout1"
android:layout_centerInParent="true">
<CheckBox
android:id="@+id/checkbox1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="10dip"
android:visibility="gone"
android:checked="false"/>
<TextView
android:id="@+id/title"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginLeft="10dip"
android:layout_marginStart="10dip"
android:layout_marginTop="10dip"
android:layout_weight="20"
android:ellipsize="end"
android:maxLines="1"
android:textAlignment="center"
android:textColor="#000000"
android:textSize="16sp"
android:textStyle="bold" />
<!--android:scrollHorizontally="true"-->
<!--android:layout_alignParentLeft="true"-->
<!--android:layout_alignParentStart="true"-->
<Space
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="5" />
<TextView
android:id="@+id/body"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginEnd="8dip"
android:layout_marginRight="8dip"
android:layout_marginTop="10dip"
android:layout_weight="35"
android:ellipsize="end"
android:maxLines="1"
android:textAlignment="center"
android:textColor="#000000"
android:textSize="16sp" />
<!--android:layout_alignParentRight="true"-->
<ImageView
android:id="@+id/Critical"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginTop="8dip"
android:layout_weight="10"
android:textSize="16sp" />
<ImageView
android:id="@+id/state"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginTop="8dip"
android:layout_weight="10"
android:textSize="16sp" />
</LinearLayout>
I set the visibility of the CheckBox to VISIBLE in my custom Adapter setOnLongClickListener. The problem happens on first time long click. For the first item of list when i set visibility to VISIBLE and then check one of the CheckBoxes, It isn't checked but my num_selected is incremented and set to one. Here is my CustomAdapter getView(the line with comments):
public View getView(final int position, View convertView, ViewGroup parent) {
final Holder holder = new Holder();
final View rowView;
rowView = inflater.inflate(R.layout.list_row_layout, parent, false);
holder.tv1 = (TextView) rowView.findViewById(R.id.title);
holder.tv2 = (TextView) rowView.findViewById(R.id.body);
holder.cb = (CheckBox) rowView.findViewById(R.id.checkbox1);
holder.iv = (ImageView) rowView.findViewById(R.id.state);
holder.i2 = (ImageView) rowView.findViewById(R.id.Critical);
holder.tv1.setText(Titles.get(position));
holder.tv2.setText(Bodies.get(position));
if (isSeen.get(position))
holder.iv.setImageResource(R.mipmap.ic_done_all_black_24dp);
else
holder.iv.setImageResource(R.mipmap.ic_done_black_24dp);
if (CList.get(position)) {
holder.i2.setImageResource(R.mipmap.ic_priority_high_black_24dp);
}
if(num_selected > 0)
{
holder.cb.setVisibility(View.VISIBLE);
}
else
{
holder.cb.setVisibility(View.GONE);
}
rowView.setOnLongClickListener(new View.OnLongClickListener() {
@Override
public boolean onLongClick(View v) {
if((num_selected == 1)&(holder.cb.isChecked()))
{
holder.cb.setChecked(false);
num_selected--;
isSelected = false;
}
else
if(holder.cb.isChecked())
{
holder.cb.setChecked(false);
num_selected--;
}
else {
holder.cb.setVisibility(View.VISIBLE); // this is the line that change visibility with no problem
holder.cb.setChecked(true); // it seems this line doesn't work at all!
num_selected++; // this line is also increment it to 1
}
return true;
}
});
return rowView;
}
It seems that it needs delay to check a CheckBox. After that all CheckBoxes checked and unchecked properly.
Update: Also tried notifyDataSetChanged and holder.cb.invalidate(); and holder.cb.requestLayout(); with no luck. Also i forgot to say that my adapter is a ListAdapter.
Before LongClick :
After LongClick :
Solution
After running some test on my code, i figure out that that code makes Checkboxes disappear on scrolling.
With little search i found the solution to my question and scrolling issue too. I define array of Boolean to store checked/unchecked CheckBoxes. I Define mCheckedState as class variable in my CustomAdapter and Update it in setOnLongClickListener accordingly:
private final boolean[] mCheckedState; // **New Code**
public View getView(final int position, View convertView, ViewGroup parent) {
final Holder holder = new Holder();
final View rowView;
rowView = inflater.inflate(R.layout.list_row_layout, parent, false);
holder.tv1 = (TextView) rowView.findViewById(R.id.title);
holder.tv2 = (TextView) rowView.findViewById(R.id.body);
holder.cb = (CheckBox) rowView.findViewById(R.id.checkbox1);
holder.iv = (ImageView) rowView.findViewById(R.id.state);
holder.i2 = (ImageView) rowView.findViewById(R.id.Critical);
holder.tv1.setText(Titles.get(position));
holder.tv2.setText(Bodies.get(position));
if (isSeen.get(position))
holder.iv.setImageResource(R.mipmap.ic_done_all_black_24dp);
else
holder.iv.setImageResource(R.mipmap.ic_done_black_24dp);
if (CList.get(position)) {
holder.i2.setImageResource(R.mipmap.ic_priority_high_black_24dp);
}
if(num_selected > 0)
{
holder.cb.setVisibility(View.VISIBLE);
}
else
{
holder.cb.setVisibility(View.GONE);
}
rowView.setOnLongClickListener(new View.OnLongClickListener() {
@Override
public boolean onLongClick(View v) {
if((num_selected == 1)&(holder.cb.isChecked()))
{
mCheckedState[position] = false; // **New Code**
holder.cb.setChecked(false);
num_selected--;
isSelected = false;
notifyDataSetChanged(); // **New Code**
}
else
if(holder.cb.isChecked())
{
mCheckedState[position] = false; // **New Code**
holder.cb.setChecked(false);
notifyDataSetChanged(); // **New Code**
num_selected--;
}
else {
holder.cb.setVisibility(View.VISIBLE);
notifyDataSetChanged(); // **New Code**
holder.cb.setChecked(true);
mCheckedState[position] = true; // **New Code**
num_selected++;
}
return true;
}
});
holder.cb.setChecked(mCheckedState[position]); // **New Code**
return rowView;
}
I hope this helps other people having similar problems.
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