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ListView: observe dataset changes

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This commit is contained in:
Julian Winkler
2024-02-18 00:17:00 +01:00
parent 9c684ee906
commit 3486d59e81
3 changed files with 46 additions and 13 deletions
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23
src/api-impl/android/widget/AbsListView.java
View File

@@ -1,11 +1,13 @@
package android.widget;
import android.content.Context;
import android.database.DataSetObserver;
import android.util.AttributeSet;
public abstract class AbsListView extends AdapterView {
public boolean mIsChildViewEnabled = false; // this field gets directly accessed by androidx DropDownListView
private Observer observer = new Observer();
public AbsListView(Context context) {
super(context);
@@ -15,6 +17,10 @@ public abstract class AbsListView extends AdapterView {
super(context, attributeSet);
}
public AbsListView(Context context, AttributeSet attributeSet, int defStyle) {
super(context, attributeSet, defStyle);
}
@Override
protected native long native_constructor(Context context, AttributeSet attrs);
protected native void native_setAdapter(long widget, ListAdapter adapter);
@@ -24,7 +30,12 @@ public abstract class AbsListView extends AdapterView {
public void setOnScrollListener(OnScrollListener onScrollListener) {}
public void setAdapter(ListAdapter adapter) {
ListAdapter oldAdapter = getAdapter();
if (oldAdapter != null)
oldAdapter.unregisterDataSetObserver(observer);
super.setAdapter(adapter);
if (adapter != null)
adapter.registerDataSetObserver(observer);
native_setAdapter(this.widget, adapter);
}
@@ -53,4 +64,16 @@ public abstract class AbsListView extends AdapterView {
public interface SelectionBoundsAdjuster {}
private class Observer extends DataSetObserver {
@Override
public void onChanged() {
AbsListView.this.native_setAdapter(widget, getAdapter());
}
@Override
public void onInvalidated() {
AbsListView.this.native_setAdapter(widget, getAdapter());
}
}
}

4
src/api-impl/android/widget/AdapterView.java
View File

@@ -17,6 +17,10 @@ public abstract class AdapterView extends ViewGroup {
super(context, attributeSet);
}
public AdapterView(Context context, AttributeSet attributeSet, int defStyle) {
super(context, attributeSet, defStyle);
}
public interface OnItemSelectedListener {
}