我正在尝试在ListView不使用上下文操作栏的情况下实现多项选择CheckBox。当我使用ArrayAdapterwithCHOICE_MODE_MULTIPLE_MODAL时没有问题，但是当我切换到扩展的 CustomAdapter 时ArrayAdapter，似乎长按它什么也没做。
public class MainActivity extends Activity implements PullToRefreshAttacher.OnRefreshListener {
private PullToRefreshAttacher mPullToRefreshAttacher;
private static final int SIMULATED_REFRESH_LENGHT = 5000;
private ArrayList<String> mItems = new ArrayList<String>();
private SelectionAdapter mAdapter;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
for (int i = 0; i < 24; i++) {
mItems.add("Name" + i);
}
mAdapter = new SelectionAdapter(this, R.layout.single_item, R.id.item, mItems);
final ListView listView = (ListView) findViewById(R.id.list);
listView.setLongClickable(true);
listView.setChoiceMode(AbsListView.CHOICE_MODE_MULTIPLE_MODAL);
listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {
listView.setItemChecked(i, !mAdapter.isPositionChecked(i));
}
});
listView.setMultiChoiceModeListener(new AbsListView.MultiChoiceModeListener() {
private int nr = 0;
@Override
public void onItemCheckedStateChanged(ActionMode actionMode, int i, long l, boolean b) {
if (b)
nr++;
else
nr--;
actionMode.setTitle(nr + " Selected");
}
@Override
public boolean onCreateActionMode(ActionMode actionMode, Menu menu) {
MenuInflater inflater = actionMode.getMenuInflater();
inflater.inflate(R.menu.main, menu);
return true;
}
@Override
public boolean onPrepareActionMode(ActionMode actionMode, Menu menu) {
return false;
}
@Override
public boolean onActionItemClicked(ActionMode actionMode, MenuItem menuItem) {
StringBuilder sb = new StringBuilder();
Set<Integer> positions = mAdapter.getCurrentCheckedPosition();
for (Integer pos : positions) {
sb.append(" " + pos + ",");
}
Toast.makeText(MainActivity.this, sb.toString(), Toast.LENGTH_SHORT).show();
actionMode.finish();
return false;
}
@Override
public void onDestroyActionMode(ActionMode actionMode) {
mAdapter.clearSelection();
}
});
listView.setAdapter(new SlideExpandableListAdapter(mAdapter, R.id.expandable_toggle_button, R.id.expandable));
mPullToRefreshAttacher = PullToRefreshAttacher.get(this);
mPullToRefreshAttacher.addRefreshableView(listView, this);
}
@Override
public void onRefreshStarted(View view) {
new AsyncTask<Void, Void, Void>() {
@Override
protected Void doInBackground(Void... params) {
try {
Thread.sleep(SIMULATED_REFRESH_LENGHT);
} catch (InterruptedException e) {
e.printStackTrace();
}
return null;
}
@Override
protected void onPostExecute(Void result) {
super.onPostExecute(result);
mPullToRefreshAttacher.setRefreshComplete();
}
}.execute();
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
private class SelectionAdapter extends ArrayAdapter<String> {
private HashMap<Integer, Boolean> mSelection = new HashMap<Integer, Boolean>();
public SelectionAdapter(Context context, int resource, int textViewResourceId, List<String> objects) {
super(context, resource, textViewResourceId, objects);
}
public void setNewSelection(int position, boolean value) {
mSelection.put(position, value);
notifyDataSetChanged();
}
public boolean isPositionChecked(int position) {
Boolean result = mSelection.get(position);
return result == null ? false : result;
}
public Set<Integer> getCurrentCheckedPosition() {
return mSelection.keySet();
}
public void removeSelection(int position) {
mSelection.remove(position);
notifyDataSetChanged();
}
public void clearSelection() {
mSelection = new HashMap<Integer, Boolean>();
notifyDataSetChanged();
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
View v = super.getView(position, convertView, parent);
v.setBackground(getResources().getDrawable(R.drawable.card_bg_r4));
if (mSelection.get(position) != null) {
v.setBackground(getResources().getDrawable(R.drawable.card_bg_r4));
}
return v;
}
}
}
这是行的布局
<?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:orientation="vertical">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<TextView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:text="@string/hello_world"
android:id="@+id/item" />
<Button
android:id="@+id/expandable_toggle_button"
android:text="More"
android:layout_height="wrap_content"
android:layout_width="wrap_content"
android:layout_alignBottom="@+id/item"
android:layout_alignParentRight="true"
android:layout_alignTop="@id/item"/>
</RelativeLayout>
<LinearLayout android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="horizontal"
android:id="@+id/expandable"
android:background="#000000">
<Button
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_weight="0.5"
android:text="Action A" />
<Button
android:id="@+id/details"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_weight="0.5"
android:text="Action B"/>
</LinearLayout>
</LinearLayout>