我正在构建测验应用程序，并且正在从Firebase数据库中获取数据。在自定义列表视图中，我使用了单选组和单选按钮。
当我在自定义列表视图中单击一个时，将自动选择多个单选按钮。例如，如果我在列表1中选择第一个单选按钮，则会自动选择列表5中的相同单选按钮。
这是我的customListView
$("table").find(".table-times .date-span").eq(i).prepend(elem.html());
// ----------------------------------------^^^^^
这是我的customListView适配器类
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent" android:layout_height="match_parent">
<TextView
android:id="@+id/ques"
android:layout_width="350dp"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:layout_marginTop="13dp"
android:text="Question"
android:textAppearance="@style/TextAppearance.AppCompat"
android:textColor="@android:color/black"
android:textSize="17sp" />
<RadioGroup
android:id="@+id/choose"
android:layout_width="350dp"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:layout_marginTop="44dp">
<RadioButton
android:id="@+id/opt_a"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:buttonTint="@android:color/black"
android:text="Option A"
android:textAppearance="@style/TextAppearance.AppCompat"
android:textColor="@android:color/black"
android:textSize="17sp" />
<RadioButton
android:id="@+id/opt_b"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:buttonTint="@android:color/black"
android:text="Option B"
android:textAppearance="@style/TextAppearance.AppCompat"
android:textColor="@android:color/black"
android:textSize="17sp"/>
<RadioButton
android:id="@+id/opt_c"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="Option C"
android:textAppearance="@style/TextAppearance.AppCompat"
android:textColor="@android:color/black"
android:buttonTint="@android:color/black"
android:textSize="17sp"/>
<RadioButton
android:id="@+id/opt_d"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="Option D"
android:textAppearance="@style/TextAppearance.AppCompat"
android:textColor="@android:color/black"
android:buttonTint="@android:color/black"
android:textSize="17sp"/>
</RadioGroup>
<TextView
android:id="@+id/ans"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignStart="@+id/ques"
android:layout_below="@+id/choose"
android:text="Answer"
android:visibility="gone" />
</RelativeLayout>
此类将数据发送到customListView Adapter类
package sk.droidgen.studyzone;
import android.content.Context;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.RadioButton;
import android.widget.RadioGroup;
import android.widget.TextView;
import android.widget.Toast;
import java.util.ArrayList;
public class TestQuesList extends ArrayAdapter<Test> {
private customButtonListener buttonListener;
public interface customButtonListener{
void onRadioButtonClicked(String selected,String answer);
}
void setButtonListener(customButtonListener listener){
this.buttonListener=listener;
}
TestQuesList(Context context, ArrayList<Test> list){
super(context, R.layout.quiz_listview,list);
}
@NonNull
@Override
public View getView(final int position, @Nullable View convertView, @NonNull ViewGroup parent) {
final ViewHolder holder;
final Test test;
if (convertView==null) {
LayoutInflater inflater = LayoutInflater.from(getContext());
convertView = inflater.inflate(R.layout.quiz_listview, parent, false);
holder=new ViewHolder();
holder.radioGroup=convertView.findViewById(R.id.choose);
holder.ques = convertView.findViewById(R.id.ques);
holder.ans = convertView.findViewById(R.id.ans);
holder.op1 = convertView.findViewById(R.id.opt_a);
holder.op2 = convertView.findViewById(R.id.opt_b);
holder.op3 = convertView.findViewById(R.id.opt_c);
holder.op4 = convertView.findViewById(R.id.opt_d);
convertView.setTag(holder);
}
else {
holder=(ViewHolder) convertView.getTag();
}
test = getItem(position);
holder.ques.setText(test.getQuestion());
holder.ans.setText(test.getAns());
holder.op1.setText(test.getOpt_a());
holder.op2.setText(test.getOpt_b());
holder.op3.setText(test.getOpt_c());
holder.op4.setText(test.getOpt_d());
holder.finalConvertView = convertView;
holder.radioGroup.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(RadioGroup radioGroup, int i) {
holder.op1.setEnabled(false);
holder.op2.setEnabled(false);
holder.op3.setEnabled(false);
holder.op4.setEnabled(false);
RadioButton selectedRadioButton = holder.finalConvertView.findViewById(i);
buttonListener.onRadioButtonClicked(selectedRadioButton.getText().toString(),holder.ans.getText().toString());
}
});
return convertView;
}
public class ViewHolder {
TextView ques,ans;
RadioButton op1,op2,op3,op4;
RadioGroup radioGroup;
View finalConvertView;
}
}
这是listview xml文件
package sk.droidgen.studyzone;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.ListView;
import android.widget.Toast;
import com.google.firebase.database.ChildEventListener;
import com.google.firebase.database.DataSnapshot;
import com.google.firebase.database.DatabaseError;
import com.google.firebase.database.DatabaseReference;
import com.google.firebase.database.FirebaseDatabase;
import java.util.ArrayList;
public class TakeTest extends AppCompatActivity implements TestQuesList.customButtonListener {
private FirebaseDatabase database;
private NetworkStatus networkStatus;
private ArrayList<Test> list;
private ListView listView;
private DatabaseReference myRef;
private TestQuesList quesList;
private int mark=0;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_take_test);
database = FirebaseDatabase.getInstance();
list = new ArrayList<>();
listView = findViewById(R.id.quiz_view);
networkStatus = new NetworkStatus(getApplicationContext());
if (!networkStatus.isConneted) {
Toast.makeText(getApplicationContext(), "No Internet Connection\nPlease Turn On Internet", Toast.LENGTH_SHORT).show();
} else {
checkDb();
}
}
private void checkDb() {
myRef = database.getReference("test");
myRef.addChildEventListener(new ChildEventListener() {
@Override
public void onChildAdded(DataSnapshot dataSnapshot, String s) {
String ques=dataSnapshot.child("/"+"question").getValue(String.class);
String ans=dataSnapshot.child("/"+"ans").getValue(String.class);
String op1=dataSnapshot.child("/"+"opt_a").getValue(String.class);
String op2=dataSnapshot.child("/"+"opt_b").getValue(String.class);
String op3=dataSnapshot.child("/"+"opt_c").getValue(String.class);
String op4=dataSnapshot.child("/"+"opt_d").getValue(String.class);
Test test = new Test(ques,op1,op2,op3,op4,ans);
list.add(test);
quesList=new TestQuesList(getApplicationContext(),list);
listView.setAdapter(quesList);
quesList.setButtonListener(TakeTest.this);
}
@Override
public void onChildChanged(DataSnapshot dataSnapshot, String s) {
}
@Override
public void onChildRemoved(DataSnapshot dataSnapshot) {
}
@Override
public void onChildMoved(DataSnapshot dataSnapshot, String s) {
}
@Override
public void onCancelled(DatabaseError databaseError) {
}
});
}
public void onSubmitClicked(View view) {
Toast.makeText(getApplicationContext(), mark, Toast.LENGTH_SHORT).show();
}
@Override
public void onRadioButtonClicked(String selected, String answer) {
if (selected.equals(answer)){
mark=mark+1;;
}
}
}