Android如何在单击RecyclerView项目时从片段发送意图
我的应用程序使用包含在片段中的RecyclerView进行编码。我能够用模拟数据列表成功地填充RecyclerView,但是我不知道如何在单击其中一个项目时向另一个活动发送意图。当我试图从片段中调用Android如何在单击RecyclerView项目时从片段发送意图,android,android-intent,android-fragments,android-recyclerview,Android,Android Intent,Android Fragments,Android Recyclerview,我的应用程序使用包含在片段中的RecyclerView进行编码。我能够用模拟数据列表成功地填充RecyclerView,但是我不知道如何在单击其中一个项目时向另一个活动发送意图。当我试图从片段中调用StartActivity时,Android Studio无法解析该方法 MyonItemClick是通过我的viewholder类中的接口实现的。接口还生成一个错误内部类不能有静态声明。 我想知道我是否无法从片段中调用StartActivity,因为我的RecyclerView适配器或viewhol
StartActivity
时,Android Studio无法解析该方法
MyonItemClick
是通过我的viewholder类中的接口实现的。接口还生成一个错误内部类不能有静态声明。
我想知道我是否无法从片段中调用StartActivity
,因为我的RecyclerView适配器或viewholder类都没有扩展Activity
单击RecyclerView中的项目时,发送意向的适当实现是什么
占位符片段
public static class PlaceholderFragment extends Fragment {
Activity mActivity;
RecyclerView mRecyclerView;
TaskAdapter taskAdapter;
public PlaceholderFragment() {
}
@Override
public void onAttach(Activity activity) {
super.onAttach(activity);
this.mActivity = (Activity) activity;
setRetainInstance(true);
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_main, container, false);
mRecyclerView = (RecyclerView) rootView.findViewById(R.id.cardList);
taskAdapter = new TaskAdapter(createList(30));
return rootView;
}
@Override
public void onViewCreated(View view, Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
mRecyclerView.setAdapter(taskAdapter);
mRecyclerView.setHasFixedSize(true);
mRecyclerView.setLayoutManager(new LinearLayoutManager(getActivity()));
mRecyclerView.setItemAnimator(new DefaultItemAnimator());
//Cannot resolve method
taskAdapter.SetItemClickListener(new TaskAdapter.TaskViewHolder.OnItemClickListener() {
@Override
public void onItemClick(View v, int position) {
Intent detailIntent = new Intent(v.getContext(), DetailActivity.class);
//Cannot resolve method
StartActivity(detailIntent);
}
});
}
private List<Task> createList(int size) {
List<Task> result = new ArrayList<>();
for (int i = 1; i<=size; i++) {
Task task = new Task();
task.title = Task.TITLE_PREFIX + i;
task.updated = Task.UPDATED_PREFIX +i;
task.notes = task.NOTES_PREFIX + i;
result.add(task);
}
return result;
}
}
public class TaskAdapter extends RecyclerView.Adapter<TaskAdapter.TaskViewHolder> {
private List<Task> taskList;
TaskViewHolder.OnItemClickListener mItemClickListener;
public TaskAdapter(List<Task> taskList) {
this.taskList = taskList;
}
@Override
public int getItemCount() {
return taskList.size();
}
@Override
public void onBindViewHolder(TaskViewHolder taskViewHolder, int i) {
Task task = taskList.get(i);
taskViewHolder.mTitle.setText(task.title);
taskViewHolder.mUpdated.setText(task.updated);
taskViewHolder.mStatus.setChecked(false);
}
@Override
public TaskViewHolder onCreateViewHolder(ViewGroup viewGroup, int i) {
View itemView = LayoutInflater.from(viewGroup.getContext()).
inflate(R.layout.tasklist_layout, viewGroup, false);
return new TaskViewHolder(itemView);
}
public class TaskViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener {
protected TextView mTitle;
protected TextView mUpdated;
protected CheckBox mStatus;
public TaskViewHolder(View view) {
super(view);
mTitle = (TextView) view.findViewById(R.id.title);
mUpdated = (TextView) view.findViewById(R.id.updated);
mStatus = (CheckBox) view.findViewById(R.id.status);
view.setOnClickListener(this);
}
@Override
public void onClick(View v) {
if (mItemClickListener != null) {
mItemClickListener.onItemClick(v, getPosition());
}
}
//Inner Classes cannot have static declarations
public interface OnItemClickListener {
void onItemClick(View view , int position);
}
public void SetOnItemClickListener(final OnItemClickListener mItemClickListener) {
//cannot resolve symbol
this.mItemClickListener = mItemClickListener;
}
}
}
公共静态类占位符片段扩展片段{
活动能力;
回收视图mRecyclerView;
任务适配器任务适配器;
公共占位符片段(){
}
@凌驾
公共事务主任(活动){
超级转速计(活动);
this.mActivity=(活动)活动;
setRetainInstance(真);
}
@凌驾
创建视图上的公共视图(布局、充气机、视图组容器、,
Bundle savedInstanceState){
视图根视图=充气机。充气(R.layout.fragment_main,容器,错误);
mRecyclerView=(RecyclerView)rootView.findviewbyd(R.id.cardList);
taskAdapter=新的taskAdapter(createList(30));
返回rootView;
}
@凌驾
已创建视图上的公共void(视图,捆绑保存状态){
super.onViewCreated(视图,savedInstanceState);
mRecyclerView.setAdapter(taskapter);
mRecyclerView.setHasFixedSize(true);
setLayoutManager(新的LinearLayoutManager(getActivity());
setItemAnimator(新的DefaultItemAnimator());
//无法解析方法
taskAdapter.SetItemClickListener(新的taskAdapter.TaskViewHolder.OnItemClickListener(){
@凌驾
公共空间单击(视图v,内部位置){
Intent detailIntent=新的意图(v.getContext(),DetailActivity.class);
//无法解析方法
星触觉(意向);
}
});
}
私有列表createList(整数大小){
列表结果=新建ArrayList();
对于(inti=1;istartActivity()方法以小s开头。请尝试下面的代码行
//Cannot resolve method
taskAdapter.TaskViewHolder.SetItemClickListener(new TaskAdapter.TaskViewHolder.OnItemClickListener() {
@Override
public void onItemClick(View v, int position) {
Intent detailIntent = new Intent(v.getContext(), DetailActivity.class);
//Cannot resolve method
getActivity().startActivity(detailIntent);
}
});
SetOnItemClickListener()应该在TaskViewHolder类之外。请尝试下面的方法,看看是否有帮助
public class TaskAdapter extends RecyclerView.Adapter<TaskAdapter.TaskViewHolder> {
private List<Task> taskList;
TaskViewHolder.OnItemClickListener mItemClickListener;
public TaskAdapter(List<Task> taskList) {
this.taskList = taskList;
}
@Override
public int getItemCount() {
return taskList.size();
}
@Override
public void onBindViewHolder(TaskViewHolder taskViewHolder, int i) {
Task task = taskList.get(i);
taskViewHolder.mTitle.setText(task.title);
taskViewHolder.mUpdated.setText(task.updated);
taskViewHolder.mStatus.setChecked(false);
}
@Override
public TaskViewHolder onCreateViewHolder(ViewGroup viewGroup, int i) {
View itemView = LayoutInflater.from(viewGroup.getContext()).
inflate(R.layout.tasklist_layout, viewGroup, false);
return new TaskViewHolder(itemView);
}
public class TaskViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener {
protected TextView mTitle;
protected TextView mUpdated;
protected CheckBox mStatus;
public TaskViewHolder(View view) {
super(view);
mTitle = (TextView) view.findViewById(R.id.title);
mUpdated = (TextView) view.findViewById(R.id.updated);
mStatus = (CheckBox) view.findViewById(R.id.status);
view.setOnClickListener(this);
}
@Override
public void onClick(View v) {
if (mItemClickListener != null) {
mItemClickListener.onItemClick(v, getPosition());
}
}
//Inner Classes cannot have static declarations
public interface OnItemClickListener {
void onItemClick(View view , int position);
}
}
public void SetOnItemClickListener(final OnItemClickListener mItemClickListener) {
//cannot resolve symbol
this.mItemClickListener = mItemClickListener;
}
}
公共类TaskAdapter扩展了RecyclerView.Adapter{
私人名单任务清单;
TaskViewHolder.OnItemClickListener mItemClickListener;
公用任务适配器(列表任务列表){
this.taskList=任务列表;
}
@凌驾
public int getItemCount(){
返回taskList.size();
}
@凌驾
BindViewHolder上的公共无效(TaskViewHolder TaskViewHolder,int i){
Task=taskList.get(i);
taskViewHolder.mTitle.setText(task.title);
taskViewHolder.mUpdated.setText(task.updated);
taskViewHolder.mStatus.setChecked(false);
}
@凌驾
公共任务ViewHolder onCreateViewHolder(视图组视图组,int i){
View itemView=LayoutInflater.from(viewGroup.getContext())。
充气(R.layout.tasklist\u布局,视图组,false);
返回新的TaskViewHolder(itemView);
}
公共类TaskViewHolder扩展了RecyclerView.ViewHolder实现了View.OnClickListener{
受保护的文本视图mTitle;
受保护的文本视图mUpdated;
受保护状态;
公共任务视图持有者(视图){
超级(视图);
mTitle=(TextView)view.findViewById(R.id.title);
mUpdated=(TextView)view.findViewById(R.id.updated);
mStatus=(复选框)view.findViewById(R.id.status);
view.setOnClickListener(这个);
}
@凌驾
公共void onClick(视图v){
if(mItemClickListener!=null){
onItemClick(v,getPosition());
}
}
//内部类不能有静态声明
公共接口侦听器{
void onItemClick(视图,int位置);
}
}
公共void SetOnItemClickListener(最终OnItemClickListener mItemClickListener){
//无法解析符号
this.mItemClickListener=mItemClickListener;
}
}
解决了startActivity方法的特定问题,但是项目仍然没有生成,因为我的接口生成了错误内部类不能有静态声明
。当我尝试调用taskAdapter.SetItemClickListener
时,错误是无法解析方法
,但是您创建的接口efined不是静态的。您发布了原始代码吗?SetOnItemClickListener方法在TaskViewHolder类中。将其放入TaskAdapter类中,该类解决除接口错误以外的所有问题。内部类不能有静态声明。
。可能是因为我在静态片段中实现该方法?啊,因为无法在内部类中定义面。解决方案是将接口移动到适配器类中。“onCreateView”和您将回收视图放在那里的onViewCreated
之间有什么区别?