我知道现在回答这个问题有点晚了。而且我不知道它是否符合OP的要求。但这可能会对某人有所帮助。我用一个简单的技巧实现了这个多选 RecyclerView。这是我的代码。
activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#EEE">
<android.support.v7.widget.RecyclerView
android:id="@+id/recycler_view"
android:layout_width="match_parent"
android:layout_height="match_parent" />
</RelativeLayout>
item_row.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="1dp"
android:background="#FFF"
android:clickable="true"
android:orientation="vertical">
<TextView
android:id="@+id/text_view"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:padding="10dp"
tools:text="TextView" />
</LinearLayout>
在item_row.xml android:clickable="true" 中很重要。
MainActivity.java
public class MainActivity extends AppCompatActivity {
private List<Model> mModelList;
private RecyclerView mRecyclerView;
private RecyclerView.Adapter mAdapter;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mRecyclerView = (RecyclerView) findViewById(R.id.recycler_view);
mAdapter = new RecyclerViewAdapter(getListData());
LinearLayoutManager manager = new LinearLayoutManager(MainActivity.this);
mRecyclerView.setHasFixedSize(true);
mRecyclerView.setLayoutManager(manager);
mRecyclerView.setAdapter(mAdapter);
}
private List<Model> getListData() {
mModelList = new ArrayList<>();
for (int i = 1; i <= 25; i++) {
mModelList.add(new Model("TextView " + i));
}
return mModelList;
}
}
Model.java
public class Model {
private String text;
private boolean isSelected = false;
public Model(String text) {
this.text = text;
}
public String getText() {
return text;
}
public void setSelected(boolean selected) {
isSelected = selected;
}
public boolean isSelected() {
return isSelected;
}
}
RecyclerViewAdapter.java
public class RecyclerViewAdapter extends RecyclerView.Adapter<RecyclerViewAdapter.MyViewHolder> {
private List<Model> mModelList;
public RecyclerViewAdapter(List<Model> modelList) {
mModelList = modelList;
}
@Override
public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.item_row, parent, false);
return new MyViewHolder(view);
}
@Override
public void onBindViewHolder(final MyViewHolder holder, int position) {
final Model model = mModelList.get(position);
holder.textView.setText(model.getText());
holder.view.setBackgroundColor(model.isSelected() ? Color.CYAN : Color.WHITE);
holder.textView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
model.setSelected(!model.isSelected());
holder.view.setBackgroundColor(model.isSelected() ? Color.CYAN : Color.WHITE);
}
});
}
@Override
public int getItemCount() {
return mModelList == null ? 0 : mModelList.size();
}
public class MyViewHolder extends RecyclerView.ViewHolder {
private View view;
private TextView textView;
private MyViewHolder(View itemView) {
super(itemView);
view = itemView;
textView = (TextView) itemView.findViewById(R.id.text_view);
}
}
}
它是如何工作的？
onBindViewHolder() 方法将 ArrayList 中的数据绑定到 View 对象。因此，及时将数据绑定到视图，它会从 ArrayList 中获取具有当前位置的 Model model = mModelList.get(position); 的单个对象。现在我们需要检查该特定对象是否被选中。像这样，
model.isSelected()
返回true 或false。如果该对象已被选中，我们需要更改选中的row_item 的背景颜色。为此，这里是代码
holder.view.setBackgroundColor(model.isSelected() ? Color.CYAN : Color.WHITE);
如果选中，则将背景颜色更改为cyan，否则为white。
对于选择，我们需要使用setOnClickListener() 方法。 （这里我只使用TextView。所以我在TextView 上执行点击事件）。这里holder.view 表示整个单曲item_row。 Onclick 将布尔值切换为 true 或 false。
holder.textView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
model.setSelected(!model.isSelected());
holder.view.setBackgroundColor(model.isSelected() ? Color.CYAN : Color.WHITE);
}
});
在托管 RecyclerView 的 Activity 或 Fragment 中，您可以像这样获取选定的对象/项目
String text = "";
for (Model model : mModelList) {
if (model.isSelected()) {
text += model.getText();
}
}
Log.d("TAG","Output : " + text);
这是输出
编辑1：限制用户只能选择一项。
private int lastSelectedPosition = -1; // declare this variable
...
// your code
...
@Override
public void onBindViewHolder(final MyViewHolder holder, int position) {
final Model model = mModelList.get(position);
holder.textView.setText(model.getText());
holder.view.setBackgroundColor(model.isSelected() ? Color.CYAN : Color.WHITE);
holder.textView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
// check whether you selected an item
if(lastSelectedPosition > 0) {
mModelList.get(lastSelectedPosition).setSelected(false);
}
model.setSelected(!model.isSelected());
holder.view.setBackgroundColor(model.isSelected() ? Color.CYAN : Color.WHITE);
// store last selected item position
lastSelectedPosition = holder.getAdapterPosition();
}
});
}
希望对你有所帮助。