标签：android-recyclerview android-edittext android
我正在尝试从我的活动(其中有X个编辑文本)的回收者视图中获取玩家名称.我尝试使用TextChangedListener将名称添加到播放器名称的ArrayList中,但是我得到了每个步骤(即：B,Bo,Bob,D,Da,Dav,Davi,David),而我试图仅获取最终的字符串值(仅全名？我如何为此修改TextChangedListener？还有另一种方法吗？
干杯;
package com.olirwin.spartacus.deutsch;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.text.Editable;
import android.text.TextWatcher;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.view.inputmethod.InputMethodManager;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;
import java.util.ArrayList;
import java.util.List;
public class Main2Activity extends AppCompatActivity {
RecyclerView mPlayerList;
List<String> mPlayerNames;
PlayerAdapter mAdapter;
EditText mInput;
Button mCreateButton;
Button submitButton;
ArrayList<String> names;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main2);
mPlayerNames = new ArrayList<>();
// setup recycler view
mPlayerList = findViewById(R.id.player_list);
mPlayerList.setLayoutManager(new LinearLayoutManager(this));
mAdapter = new PlayerAdapter();
mPlayerList.setAdapter(mAdapter);
// setup input EditText
mInput = findViewById(R.id.input);
// setup Create button
mCreateButton = findViewById(R.id.create_button);
mCreateButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// clear old player names
mPlayerNames.clear();
// read user input: number of player:
String input = mInput.getText().toString();
int numberOfPlayer;
try {
numberOfPlayer = Integer.parseInt(input);
} catch (NumberFormatException e) {
Toast.makeText(Main2Activity.this, "Invalid input!!!", Toast.LENGTH_SHORT).show();
return;
}
for (int i = 0; i < numberOfPlayer; ++i) {
mPlayerNames.add("Player #" + (i + 1));
}
// make change on recycler view
mAdapter.notifyDataSetChanged();
// dismiss keyboard
InputMethodManager imm = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
imm.hideSoftInputFromWindow(mInput.getWindowToken(), 0);
}
});
//setup submit
submitButton = findViewById(R.id.submit);
submitButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
names = mAdapter.getNames();
Intent intent = new Intent(v.getContext(), Score.class);
intent.putStringArrayListExtra("names", names);
v.getContext().startActivity(intent);
}
});
}
private class PlayerAdapter extends RecyclerView.Adapter<PlayerAdapter.PlayerHolder> {
private ArrayList<String> names;
private String string;
public PlayerAdapter() {
names = new ArrayList<>();
}
@Override
public PlayerHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View v = LayoutInflater.from(Main2Activity.this).inflate(R.layout.item_layout, parent, false);
return new PlayerHolder(v);
}
@Override
public void onBindViewHolder(final PlayerHolder holder, int position) {
holder.bind(mPlayerNames.get(position));
holder.mPlayerName.addTextChangedListener(new TextWatcher() {
@Override
public void beforeTextChanged(CharSequence s, int start, int count, int after) {
//blank
}
@Override
public void onTextChanged(CharSequence s, int start, int before, int count) {
//blank;
}
@Override
public void afterTextChanged(Editable s) {
names.add(holder.mPlayerName.getText().toString());
}
});
}
@Override
public int getItemCount() {
return mPlayerNames.size();
}
public ArrayList<String> getNames(){
return this.names;
}
public class PlayerHolder extends RecyclerView.ViewHolder {
TextView mPlayerLabel;
EditText mPlayerName;
public PlayerHolder(View itemView) {
super(itemView);
mPlayerLabel = itemView.findViewById(R.id.player_label);
mPlayerName = itemView.findViewById(R.id.player_name);
}
public void bind(String playerName) {
mPlayerLabel.setText(playerName);
mPlayerName.setHint("Name of " + playerName);
}
}
}
}
解决方法:
创建一个以项目位置为键的HashMap
HashMap<Integer, String> map = new HashMap<>;
更改您内部的条目
@Override
public void afterTextChanged(Editable s) {
String value = map.get(position); // here position is the key
if (value != null) {
map.put(position, holder.mPlayerName.getText().toString());
} else {
// Key might be present...
if (map.containsKey(key)) {
// Okay, there's a key but the value is null
} else {
// Definitely no such key
}
}
}
然后使用HashMap中的get()方法获取HashMap值.
标签：android-recyclerview,android-edittext,android 来源： https://codeday.me/bug/20191109/2012601.html
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