我遵循了实施CAB的Android API指南,我遇到了一些问题:
当前输出是单选,不会为操作栏的原始颜色和某些默认颜色着色。这是我的代码,其中MainListAdapter是自定义ListView适配器的“常规”实现,每个项目都有自定义视图,而dataList是简单数据填充列表:
listview = (ListView)findViewById(R.id.listview);
listview.setChoiceMode(ListView.CHOICE_MODE_MULTIPLE_MODAL);
listview.setMultiChoiceModeListener(new MultiChoiceModeListener() {
@Override
public void onItemCheckedStateChanged(ActionMode mode, int position, long id, boolean checked) {
//Here you can do something when items are selected/de-selected, such as update the title in the CAB
}
@Override
public boolean onActionItemClicked(ActionMode mode, MenuItem item) {
//Respond to clicks on the actions in the CAB (contextual action bar)
switch (item.getItemId()) {
case R.id.menu_delete:
deleteSelectedItems();
mode.finish(); //Action done, so close the CAB
return true;
case R.id.menu_open:
openSelectedItem();
mode.finish(); //Action done, so close the CAB
return true;
default:
return false;
}
}
private void openSelectedItem() {
// TODO Auto-generated method stub
}
private void deleteSelectedItems() {
// TODO Auto-generated method stub
}
@Override
public boolean onCreateActionMode(ActionMode mode, Menu menu) {
//Inflate the menu for the CAB
MenuInflater inflater = mode.getMenuInflater();
inflater.inflate(R.menu.listmenu, menu);
return true;
}
@Override
public void onDestroyActionMode(ActionMode mode) {
//Here you can make any necessary updates to the activity when the CAB is removed. By default, selected items are deselected/unchecked.
//TODO refresh the list
}
@Override
public boolean onPrepareActionMode(ActionMode mode, Menu menu) {
//Here you can perform updates to the CAB due to an invalidate() request
return false;
}
});
listview.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long rowId) {
//TODO open DisplayActivity
Toast.makeText(getApplicationContext(), "Open File", Toast.LENGTH_LONG).show();
}
});
listAdapter = new MainListAdapter(dataList, context);
listview.setAdapter(listAdapter);
答案 0 :(得分:2)
不存在多项选择
未选中的所选项目(行)表示已选中
据推测,您没有为列表行设置activated
样式,这些行管理这两种行。
如何更改CAB的颜色
自定义主题应该能够做到。根据您使用的是原生操作栏,appcompat-v7
的旧版本还是appcompat-v7
的当前版本,规则应有所不同。此问题有plenty existing Stack Overflow material。
在CAB上显示一些文字
您可以致电setTitle()
setSubtitle()
和ActionMode
。
有关使用激活的样式和标题/副标题的演示,请参阅this sample app。在其中,ListView
处于正常模式,直到用户长按一行,在这种情况下,它切换到多选模式操作。