我试图长按列表视图条目并显示各种选项后打开上下文菜单。
然而,由于长按没有做/调用任何操作,我无法实现目标。
这是我用来调用上下文菜单的代码:
@Override
public void onCreateContextMenu(ContextMenu menu, View v,
ContextMenuInfo menuInfo) {
super.onCreateContextMenu(menu, v, menuInfo);
MenuItem delete = menu.add("delete");
MenuItem edit = menu.add("edit");
delete.setOnMenuItemClickListener(new OnMenuItemClickListener() {
public boolean onMenuItemClick(MenuItem item) {
return true;
}
});
edit.setOnMenuItemClickListener(new OnMenuItemClickListener() {
public boolean onMenuItemClick(MenuItem item) {
return true;
}
});
}
我也尝试过,但是没有成功:
@Override
public void onCreateContextMenu(ContextMenu menu,
View v, ContextMenuInfo menuInfo) {
menu.add(0, 1, 0, "Edit");
menu.add(0, 2, 1, "Rename");
menu.add(0, 3, 2, "Delete");
super.onCreateContextMenu(menu, v, menuInfo);
}
@Override
public boolean onContextItemSelected(MenuItem item) {
super.onContextItemSelected(item);
if(item.getTitle().equals("Edit")) {
//Edit code
} else if(item.getTitle().equals("Rename")) {
//Rename code
} else if(item.getTitle().equals("Delete")) {
//Delete code
}
return true;
};
MainActivity代码(仅相关部分):
public class MainActivity extends Activity {
private List<CountElement> myElements = new ArrayList<CountElement>();
ListView list;
ArrayAdapter<CountElement> adapter;
/*
Users enters needed listview items, code not shown here. It works fine however -
all needed elements are displayed correctly.
*/
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
adapter = new MyListAdapter();
list = (ListView) findViewById(R.id.listView1);
list.setAdapter(adapter);
registerForContextMenu(list);
}
@Override
public void onCreateContextMenu(ContextMenu menu, View v,
ContextMenuInfo menuInfo) {
super.onCreateContextMenu(menu, v, menuInfo);
MenuItem delete = menu.add("delete");
MenuItem edit = menu.add("edit");
delete.setOnMenuItemClickListener(new OnMenuItemClickListener() {
public boolean onMenuItemClick(MenuItem item) {
return true;
}
});
edit.setOnMenuItemClickListener(new OnMenuItemClickListener() {
public boolean onMenuItemClick(MenuItem item) {
return true;
}
});
}
private class MyListAdapter extends ArrayAdapter<CountElement> {
//Custom adapter code here
}
}
任何帮助都会受到极大的赞赏。谢谢!