我的应用程序遇到了一些问题，我正在尝试开发一个列表应用程序，您可以选择添加新的＆＃34;目标＆＃34;以及新列表，以便您可以将目标分类到列表，如列表对象标题可以＆＃34;健康饮食＆＃34;然后你会在里面拥有目标，比如＆＃34;多吃蔬菜＆＃34;等等。为了做到这一点，我设置了一个ViewPagerHost类，它从SQLite数据库中获取所有List对象并初始化一个工厂开发＆＃34;列表片段＆＃34;它处理添加目标，编辑和删除等所有逻辑。我相信我已经使这个工作正常，因为数据库端的所有东西似乎工作正常，然后其他类只是显示和操纵那些信息。但显示器方面的一切似乎都出错了。我在recyclerview中的每个视图都会显示一个标记为＆＃34;重要＆＃34;或者＆＃34;改变生活＆＃34;但它会在任何地方显示明星。在我点击某些内容之前，该列表也不会加载。
public class ViewPagerHost extends Activity_Logger {
private static final String ARG_TITLE = "title";
private ViewPager mViewPager;
private ArrayList<Fragment> mFragmentList;
private ArrayList<GoalList> goalList;
private ArrayList<Goal> goalArrayList;
Database_Controller controller;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_view_pager_host);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
MobileAds.initialize(getApplicationContext(), "ad-String");
AdView adView = (AdView) findViewById(R.id.ad);
AdRequest adRequest = new AdRequest.Builder().build();
adView.loadAd(adRequest);
setSupportActionBar(toolbar);
toolbar.setTitle("Ambition");
FragmentManager fragmentManager = getSupportFragmentManager();
controller = Database_Controller.get(getApplicationContext());
goalList = controller.getAllLists();
goalArrayList = controller.getAllGoals();
mViewPager = (ViewPager)findViewById(R.id.view_fragments);
if(goalList.get(0) == null){
GoalList listOne = new GoalList();
listOne.setTitle("DEFAULT");
controller.insertList(listOne);
for(int i =0; i< goalArrayList.size(); i++){
goalArrayList.get(i).setWhich_List(listOne.getTitle());
controller.updateGoal(goalArrayList.get(i));
}
}
mFragmentList = getFragmentList(goalList);
ViewPagerAdapter adapter = new ViewPagerAdapter(fragmentManager, mFragmentList);
if(adapter == null){
}else{
mViewPager.setAdapter(adapter);
}
}
public ArrayList<Fragment> getFragmentList(ArrayList<GoalList> list){
mFragmentList = new ArrayList<>();
Bundle bundle = new Bundle();
for(int i = 0; i< list.size(); i++){
List_Fragment list_fragment = new List_Fragment();
bundle.putString(ARG_TITLE, goalList.get(i).getTitle());
list_fragment.setArguments(bundle);
mFragmentList.add(list_fragment);
}
return mFragmentList;
}
}
这是我的ViewPagerHost类，用于创建工厂列表。
public class List_Fragment extends Fragment {
private RecyclerView mRecyclerView;
private static final String ARG_TITLE = "title";
private static final String ARG_GOALNAME ="Goal";
private static final String ARG_IMPORTANT = "Important";
private Database_Controller mDatabaseController;
private static final String ARG_ID = "ID";
ArrayList<Goal> goalList;
LinearLayoutManager manager;
public RecyclerView.Adapter adapter;
public ReceiverThread UiThread;
FragmentManager fragmentManager;
String list_title;
public List_Fragment() {
// Required empty public constructor
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
View view = inflater.inflate(R.layout.fragment_list_, container, false);
Bundle bundle = getArguments();
if(bundle != null){
list_title= bundle.getString(ARG_TITLE);
}
mDatabaseController = mDatabaseController.get(getContext());
goalList = mDatabaseController.getAllListsGoals(list_title);
mRecyclerView = (RecyclerView)view.findViewById(R.id.recyclerview);
manager = new LinearLayoutManager(getActivity());
UiThread = new ReceiverThread();
mRecyclerView.setLayoutManager(manager);
final RecyclerView_Adapter wrapperClass = new RecyclerView_Adapter(goalList,getContext(),this);
adapter = wrapperClass.adapter;
for(int counter =0; counter < goalList.size(); counter++){
System.out.println(goalList.get(counter).getWhich_List());
}
mRecyclerView.setAdapter(adapter);
fragmentManager= getFragmentManager();
//adapter goes here
final FloatingActionButton fab = (FloatingActionButton)view.findViewById(R.id.fab);
fab.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Fragment fragment = List_Fragment.this;
AddNew_PopUp popUp = AddNew_PopUp.newInstance(fragment);
popUp.setTargetFragment(fragment, 0);
popUp.show(fragmentManager, "PopUpDialog");
}
});
return view;
}
public class ReceiverThread extends Thread {
@Override
public void run() {
super.run();
getActivity().runOnUiThread(new Runnable() {
@Override
public void run() {
goalList.clear();
ArrayList<Goal>newGoalList = mDatabaseController.getAllGoals();
goalList.addAll(newGoalList);
adapter.notifyDataSetChanged();
}
});
}
}
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if(requestCode == 0){
if(resultCode == Activity.RESULT_OK){
Goal newGoal = new Goal();
String GoalName = data.getStringExtra(ARG_GOALNAME);
if (GoalName.isEmpty()) {
Toast.makeText(getContext(), R.string.NoGoal, Toast.LENGTH_SHORT).show();
} else {
newGoal.setmIsImportant(data.getBooleanExtra(ARG_IMPORTANT, false));
newGoal.setmGoalName(GoalName);
newGoal.setWhich_List(ARG_TITLE);
mDatabaseController.insertGoal(newGoal);
}
}
}else{
if(requestCode == 1){
if(resultCode == Activity.RESULT_OK){
String id = data.getStringExtra(ARG_ID);
Toast.makeText(getContext(),R.string.flush, Toast.LENGTH_LONG).show();
mDatabaseController.deleteGoal(id);
}
}else{
if(requestCode == 2){
if(resultCode == Activity.RESULT_OK){
String goalName = data.getStringExtra(ARG_GOALNAME);
Boolean isImportant = data.getBooleanExtra(ARG_IMPORTANT, false);
UUID id = UUID.fromString(data.getStringExtra(ARG_ID));
Goal goal = mDatabaseController.getGoal(id.toString());
goal.setmIsImportant(isImportant);
goal.setmGoalName(goalName);
mDatabaseController.updateGoal(goal);
}
}
}
}
UiThread.run();
}
public ReceiverThread getUiThread() {
return UiThread;
}
}
这是为数据库中的每个列表创建的列表片段。它根据用户的操作调用方法和操作数据。
public class RecyclerView_Adapter{
private ArrayList<Goal> mGoals;
MyAdapter adapter;
Context context;
private Database_Controller mDatabaseController;
MediaPlayer mediaPlayer;
Fragment fragment;
public RecyclerView_Adapter(ArrayList<Goal> goals, Context cntxt, Fragment fragments) {
mGoals = goals;
adapter = new MyAdapter(mGoals);
context = cntxt;
mediaPlayer = new MediaPlayer();
fragment = fragments;
mDatabaseController = Database_Controller.get(context);
}
//////////////////////////////////ADAPTER\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\
private class MyAdapter extends RecyclerView.Adapter<MyViewHolder> {
private List<Goal> mGoals;
public MyAdapter(List<Goal> goals) {
mGoals = goals;
}
@Override
public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
LayoutInflater inflater = LayoutInflater.from(parent.getContext());
View view = inflater.inflate(R.layout.recycler_view_item_layout, parent, false);
MyViewHolder holder = new MyViewHolder(view);
return holder;
}
@Override
public void onBindViewHolder(MyViewHolder holder, int position) {
final Goal goal = mGoals.get(position);
holder.bindGoal(goal);
}
@Override
public int getItemCount() {
return mGoals.size();
}
}
////////////////////////////////////ADAPTER\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\
///////////////////////////////////VIEW HOLDER\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\
public class MyViewHolder extends RecyclerView.ViewHolder {
private TextView mTextView, importantTXT;
private CheckBox mCheckBox;
private Goal mGoal;
private ImageView imgView;
public MyViewHolder(View itemView) {
super(itemView);
itemView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
AppCompatActivity context = (AppCompatActivity) v.getContext();
FragmentManager manager = context.getSupportFragmentManager();
Edit_PopUp dialog = Edit_PopUp.newInstance(mGoal);
dialog.setTargetFragment(fragment, 2);
dialog.show(manager, "EditDialog");
}
});
itemView.setOnLongClickListener(new View.OnLongClickListener() {
@Override
public boolean onLongClick(View v) {
//Add delete thingy
AppCompatActivity context = (AppCompatActivity) v.getContext();
FragmentManager manager = context.getSupportFragmentManager();
MoreOptions_PopUp dialog = MoreOptions_PopUp.newInstance(mGoal);
dialog.setTargetFragment(fragment, 1);
dialog.show(manager, "GoalDialog");
return true;
}
});
mTextView = (TextView) itemView.findViewById(R.id.text);
mCheckBox = (CheckBox) itemView.findViewById(R.id.checkbox);
imgView = (ImageView) itemView.findViewById(R.id.imageView);
importantTXT = (TextView) itemView.findViewById(R.id.Important_textView);
mCheckBox.setOnClickListener(new View.OnClickListener(){
@Override
public void onClick(View v) {
mGoal.setFinished(mCheckBox.isChecked());
mDatabaseController.updateGoal(mGoal);
if (mCheckBox.isChecked() == true) {
boolean value = checkWinning(mGoals,context);
PlaySound(value, mGoal.ismIsImportant(), v);
}
}
});
}
public void bindGoal(Goal goal) {
mGoal = goal;
mCheckBox.setChecked(mGoal.isFinished());
mTextView.setText(mGoal.getmGoalName());
if (mGoal.ismIsImportant()) {
imgView.setImageResource(R.mipmap.ic_stars_pressed);
importantTXT.setText(R.string.isImportant);
}
}
public boolean checkWinning(ArrayList<Goal> goals, Context context) {
for (int i = 0; i < goals.size(); i++) {
if (goals.get(i).isFinished() == false) {
return false;
}
}
return true;
}
public void PlaySound(Boolean winningSound, boolean isImportant, View view) {
if(winningSound){
mediaPlayer = MediaPlayer.create(context,R.raw.victory);
Snackbar snackbar = Snackbar.make(view, R.string.completion, Snackbar.LENGTH_LONG);
snackbar.show();
mediaPlayer.start();
}else {
if (isImportant) {
mediaPlayer = MediaPlayer.create(context, R.raw.collect);
mediaPlayer.start();
Snackbar snackbar = Snackbar.make(view, R.string.congrats, Snackbar.LENGTH_SHORT);
snackbar.show();
} else {
mediaPlayer = MediaPlayer.create(context, R.raw.success);
Snackbar snackbar = Snackbar.make(view, R.string.lessCongrats, Snackbar.LENGTH_SHORT);
snackbar.show();
mediaPlayer.start();
}
}
}
}
////////////////////////////////////VIEW HOLDER\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\
public MyAdapter getAdapter() {
return adapter;
}
public Fragment getFragment() {
return fragment;
}
}
这是我的适配器类，它播放声音OnClick并将视图绑定到Recyclerview。
非常感谢任何帮助！
答案 0 :(得分：1)
每一行中显示星星的问题都会引起，因为您可能在需要时设置它们，但在不需要时不会隐藏它们。 您必须在适配器的getView（）方法中实现类似的功能。
ImageView starView = (ImageView) v.findViewById(R.id.starView);
starView.setVisibility(goals.get(position).isSpecial() ? View.Visible : View.Gone);