当我选择联系人联系方式
时，我想将项目添加到RecyclerView它可以在文本视图中使用，但我可以找到如何在回收器中使用
我从联系簿中获得了两个类似于contactname和numberphne的字符串，我需要添加它以在recyclelerview中查看和显示
这是我的RecyclerView适配器代码
public class SettingCallAdapter extends RecyclerView.Adapter<SettingCallAdapter.ViewHolder>{
private Context context;
private List<Hospital> data;
private int lastSelectedPosition = 0;
public SettingCallAdapter( Context context , List<Hospital> data){
this.context = context;
this.data = data;
}
@Override
public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.item_setting_message_radio , parent , false);
ViewHolder viewHolder = new ViewHolder(view);
return viewHolder;
}
@Override
public void onBindViewHolder(ViewHolder holder, int position) {
Hospital hospital = data.get(position);
holder.name.setText(hospital.getHos_name());
holder.num.setText(hospital.getHos_tel());
holder.selectionState.setChecked(lastSelectedPosition == position);
}
@Override
public int getItemCount() {
return data.size() ;
}
public class ViewHolder extends RecyclerView.ViewHolder {
public TextView name , num;
public RadioButton selectionState;
public ViewHolder(View itemView) {
super(itemView);
name = itemView.findViewById(R.id.set_name);
num = itemView.findViewById(R.id.set_num);
selectionState = itemView.findViewById(R.id.select_state);
selectionState.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
lastSelectedPosition = getAdapterPosition();
notifyDataSetChanged();
}
});
}
}
这是我的MainActivity
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.view_setting);
TextView title = findViewById(R.id.toolbar_title);
Toolbar toolbar = findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
getSupportActionBar().setDisplayShowTitleEnabled(false);
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
getSupportActionBar().setDisplayShowHomeEnabled(true);
toolbar.setNavigationIcon(getResources().getDrawable(R.drawable.ic_back));
toolbar.setNavigationOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
onBackPressed();
}
});
title.setText(toolbar.getTitle());
title.setText("การแจ้งเหตุฉุกเฉิน");
mDatabase = FirebaseDatabase.getInstance();
mRef = mDatabase.getReference().child("setting").child("hospital");
set_button = findViewById(R.id.setting_edit_button);
set_button.setOnClickListener(this);
save_button = findViewById(R.id.setting_save_button);
save_button.setOnClickListener(this);
show_num = findViewById(R.id.show_num_call);
add_num = findViewById(R.id.add_num_call);
add_contact_message = findViewById(R.id.add_contact_message);
message = findViewById(R.id.set_message);
message.setEnabled(false);
add_num_call = findViewById(R.id.recycler_add_num_call);
show_num_message_list = findViewById(R.id.recycler_show_num_message);
add_num_message_list = findViewById(R.id.recycler_add_num_message);
select_contact = findViewById(R.id.add_contact_call);
select_contact.setOnClickListener(this);
//Check Keyboard
View view = this.getCurrentFocus();
if (view != null) {
InputMethodManager imm = (InputMethodManager)getSystemService(Context.INPUT_METHOD_SERVICE);
imm.hideSoftInputFromWindow(view.getWindowToken(), 0);
}
mRef.addValueEventListener(new ValueEventListener() {
@Override
public void onDataChange(DataSnapshot dataSnapshot) {
for (DataSnapshot dataSnapshot1 : dataSnapshot.getChildren()){
Hospital mHospital = dataSnapshot1.getValue(Hospital.class);
list_hospital.add(mHospital);
}
mAdapter = new SettingCallAdapter(SettingActivity.this , list_hospital);
mAdapter.notifyDataSetChanged();
add_num_call.setAdapter(mAdapter);
add_num_call.setHasFixedSize(true);
add_num_call.setLayoutManager(new LinearLayoutManager(SettingActivity.this));
}
@Override
public void onCancelled(DatabaseError databaseError) {
}
});
@Override
public void onClick(View view) {
switch (view.getId())
{
case R.id.setting_edit_button:
set_button.setVisibility(View.GONE);
save_button.setVisibility(View.VISIBLE);
show_num.setVisibility(View.GONE);
add_num.setVisibility(View.VISIBLE);
add_contact_message.setVisibility(View.VISIBLE);
show_num_message_list.setVisibility(View.GONE);
message.setEnabled(true);
addNumSOS();
break;
case R.id.setting_save_button:
save_button.setVisibility(View.GONE);
set_button.setVisibility(View.VISIBLE);
show_num.setVisibility(View.VISIBLE);
add_num.setVisibility(View.GONE);
add_contact_message.setVisibility(View.GONE);
show_num_message_list.setVisibility(View.VISIBLE);
message.setEnabled(false);
addMessageSOS();
break;
case R.id.add_contact_call:
Intent contactIntent = new Intent(Intent.ACTION_PICK, ContactsContract.CommonDataKinds.Phone.CONTENT_URI);
startActivityForResult(contactIntent , RESULT_PICK_CONTACT);
}
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == RESULT_PICK_CONTACT && resultCode == RESULT_OK) {
Uri contactUri = data.getData();
Cursor cursor = getContentResolver().query(contactUri, null, null, null, null);
cursor.moveToFirst();
int phoneIndex = cursor.getColumnIndex(ContactsContract.CommonDataKinds.Phone.NUMBER);
int nameIndex = cursor.getColumnIndex(ContactsContract.CommonDataKinds.Phone.DISPLAY_NAME);
name_contact = cursor.getString(nameIndex);
num_contact = cursor.getString(phoneIndex);
}
Hospital hospital= new Hospital();
hospital.setHos_name(name_contact);
hospital.setHos_tel(num_contact);
list_hospital.add(hospital);
mAdapter.notifyItemInserted(list_hospital.size()-1);
}
编辑：我如何使用差异在我的代码中查看它意味着我使用 view_1 提供表单数据，当我添加数据时使用 view_2
此图片显示差异视图，当我添加view_2有一个删除按钮，它形成ios手机
答案 0 :(得分：1)
我发现你的代码有些问题。由于您添加了ValueEventListener onDataChange，因此只要您的mRef出现问题，就会触发。那没问题。但问题是你已经在该事件上设置了适配器和布局管理器，并且每次当recovery mRef发生某些事情时，recyclerview的适配器都会发生变化。
以下是如何正确完成的。
将以下代码放在onCreate行下面的add_num_call = findViewById(R.id.recycler_add_num_call);方法中。
add_num_call.setLayoutManager(new LinearLayoutManager(SettingActivity.this));
mAdapter = new SettingCallAdapter(SettingActivity.this , list_hospital);
mAdapter.notifyDataSetChanged();
add_num_call.setHasFixedSize(true);
然后在onDataChange内，您可以将项目添加到适配器并通知更改，如下所示。
for (DataSnapshot dataSnapshot1 : dataSnapshot.getChildren()){
Hospital mHospital = dataSnapshot1.getValue(Hospital.class);
list_hospital.add(mHospital);
}
mAdapter.notifyDataSetChanged();
关于您的问题，您可以在onActivityResult上执行此操作。
Hospital hospital= new Hospital();
hospital.setHos_name(name_contact);
hospital.setHos_tel(num_contact);
list_hospital.add(hospital);
mAdapter.notifyDataSetChanged();// or better to use ---> mAdapter.notifyItemInserted(list_hospita.size()-1);
享受！
答案 1 :(得分：0)
检查数字和名称是否为空