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アンドロイドでラジオグループでcardviewを作成しました。学生出席システムを作っています。私はすでにバックエンドに参加していました。問題は現時点で、あるいは学生がいない場合は、各カードに4つのラジオボタンを備えたラジオグループを使用していました。しかし、いくつかのラジオボタンが既に確認されていると私は、スクロールしていたときに、その後のラジオボタンのチェックの付いている位置も変更される： - 。一つ一つのカードの コードがcheckboxsample.xmlラジオグループのカードビューで、ラジオボタンが既にチェックされています
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<LinearLayout
android:layout_width="fill_parent"
android:orientation="horizontal"
android:gravity="center"
android:layout_height="wrap_content">
<Button
android:layout_width="wrap_content"
android:text="Check All"
android:layout_marginRight="7dip"
android:id="@+id/btnCheckAll"
android:layout_height="wrap_content">
</Button>
<Button
android:layout_width="wrap_content"
android:text="Clear All"
android:id="@+id/btnClearAll"
android:layout_height="wrap_content">
</Button>
</LinearLayout>
<ListView
android:layout_width="fill_parent"
android:id="@+id/lvCheckBox"
android:fadingEdge="none"
android:cacheColorHint="@null"
android:layout_height="fill_parent">
</ListView>
</LinearLayout>
<?xml version="1.0" encoding="utf-8"?>
<android.support.v7.widget.CardView xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:card_view="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
card_view:cardCornerRadius="5dp"
card_view:cardUseCompatPadding="true" >
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margin="5dp" >
<TextView
android:id="@+id/tvName"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:text="name"
android:textColor="@android:color/black"
android:textSize="18sp" />
<TextView
android:id="@+id/tvEmailId"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="@id/tvName"
android:text="email"
android:textColor="@android:color/black"
android:textSize="18sp" />
<RadioGroup android:id="@+id/rg"
android:layout_alignParentRight="true"
android:layout_centerVertical="true"
android:layout_width="wrap_content"
android:layout_height="wrap_content">
<RadioButton
android:id="@+id/chkSelected"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:layout_centerVertical="true"
android:text="A"
android:checked="false">
</RadioButton>
<RadioButton
android:id="@+id/chkSelected2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginRight="64dp"
android:layout_marginEnd="64dp"
android:layout_centerVertical="true"
android:layout_toLeftOf="@+id/chkSelected"
android:layout_toStartOf="@+id/chkSelected"
android:text="P"
android:checked="false">
</RadioButton>
</RadioGroup>
</RelativeLayout>
</android.support.v7.widget.CardView>
とコードでありますstudent.javaためactivity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<include
android:id="@+id/toolbar"
layout="@layout/toolbar" />
<android.support.v7.widget.RecyclerView
android:id="@+id/my_recycler_view"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_margin="5dp"
android:layout_weight="1"
android:scrollbars="vertical" />
<Button
android:id="@+id/btnShow"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margin="5dp"
android:text="Show Selected"
android:background="#00796B"
android:textColor="@color/TextPrimaryColor"/>
</LinearLayout>
コードの
コード
cardviewactivity.javapackage com.example.administrator.cardviewcheckbok;
import java.util.ArrayList;
import java.util.List;
import android.os.Bundle;
import android.support.v7.app.ActionBarActivity;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.support.v7.widget.Toolbar;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.Toast;
public class CardViewActivity extends ActionBarActivity {
private Toolbar toolbar;
private RecyclerView mRecyclerView;
private RecyclerView.Adapter mAdapter;
private RecyclerView.LayoutManager mLayoutManager;
private List<Student> studentList;
private Button btnSelection;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
toolbar = (Toolbar) findViewById(R.id.toolbar);
btnSelection = (Button) findViewById(R.id.btnShow);
studentList = new ArrayList<Student>();
for (int i = 1; i <= 15; i++) {
Student st = new Student("Student " + i, "androidstudent" + i
+ "@gmail.com", false);
studentList.add(st);
}
if (toolbar != null) {
setSupportActionBar(toolbar);
getSupportActionBar().setTitle("Android Students");
}
mRecyclerView = (RecyclerView) findViewById(R.id.my_recycler_view);
// use this setting to improve performance if you know that changes
// in content do not change the layout size of the RecyclerView
mRecyclerView.setHasFixedSize(true);
// use a linear layout manager
mRecyclerView.setLayoutManager(new LinearLayoutManager(this));
// create an Object for Adapter
mAdapter = new CardViewDataAdapter(studentList);
// set the adapter object to the Recyclerview
mRecyclerView.setAdapter(mAdapter);
btnSelection.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
String data = "";
List<Student> stList = ((CardViewDataAdapter) mAdapter)
.getStudentist();
for (int i = 0; i < stList.size(); i++) {
Student singleStudent = stList.get(i);
if (singleStudent.isSelected() == true) {
data = data + "\n" + singleStudent.getName().toString();
/*
* Toast.makeText(CardViewActivity.this, " " +
* singleStudent.getName() + " " +
* singleStudent.getEmailId() + " " +
* singleStudent.isSelected(),
* Toast.LENGTH_SHORT).show();
*/
////
}
}
Toast.makeText(CardViewActivity.this,
"Selected Students: \n" + data, Toast.LENGTH_LONG)
.show();
}
});
}
}
ためcardviewdataadapter.java
package com.example.administrator.cardviewcheckbok;
import java.util.List;
import android.support.v7.widget.RecyclerView;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.CheckBox;
import android.widget.CompoundButton;
import android.widget.RadioButton;
import android.widget.RadioGroup;
import android.widget.TextView;
import android.widget.Toast;
import android.widget.CompoundButton.OnCheckedChangeListener;
public class CardViewDataAdapter extends
RecyclerView.Adapter<CardViewDataAdapter.ViewHolder> {
private List<Student> stList;
public CardViewDataAdapter(List<Student> students) {
this.stList = students;
}
// Create new views
@Override
public ViewHolder onCreateViewHolder(ViewGroup parent,
int viewType) {
// create a new view
View itemLayoutView = LayoutInflater.from(parent.getContext()).inflate(
R.layout.cardview_row, null);
// create ViewHolder
ViewHolder viewHolder = new ViewHolder(itemLayoutView);
return viewHolder;
}
@Override
public void onBindViewHolder(ViewHolder viewHolder, int position) {
final int pos = position;
viewHolder.tvName.setText(stList.get(position).getName());
viewHolder.tvEmailId.setText(stList.get(position).getEmailId());
viewHolder.chkSelected.setSelected(stList.get(position).isSelected());
viewHolder.chkSelected.setTag(stList.get(position));
////new checkselected2
viewHolder.chkSelected2.setSelected(stList.get(position).isSelected());
viewHolder.chkSelected2.setTag(stList.get(position));
viewHolder.checkrgg.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
RadioGroup rgg=(RadioGroup)v;
int selbutid=rgg.getCheckedRadioButtonId();
RadioButton rb= (RadioButton) rgg.getChildAt(selbutid);
Toast.makeText(v.getContext(),""+rb.getText()+"",Toast.LENGTH_LONG).show();
}
});
viewHolder.chkSelected.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
RadioButton cb = (RadioButton) v;
Student contact = (Student) cb.getTag();
contact.setSelected(cb.isSelected());
stList.get(pos).setSelected(cb.isSelected());
/* Toast.makeText(
v.getContext(),
"Clicked on Checkbox: " + "" + pos + cb + " is "
+ cb.isSelected(), Toast.LENGTH_LONG).show();
*/
}
});
viewHolder.chkSelected2.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
RadioButton cb = (RadioButton) v;
Student contact = (Student) cb.getTag();
contact.setSelected(cb.isSelected());
stList.get(pos).setSelected(cb.isSelected());
/*
Toast.makeText(
v.getContext(),
"2222222Clicked on Checkbox: "+""+pos +cb + " is "
+ cb.isSelected(), Toast.LENGTH_LONG).show();
*/
}
});
}
// Return the size arraylist
@Override
public int getItemCount() {
return stList.size();
}
public static class ViewHolder extends RecyclerView.ViewHolder {
private final RadioGroup checkrgg;
public TextView tvName;
public TextView tvEmailId;
public RadioButton chkSelected,chkSelected2;
public Student singlestudent;
public ViewHolder(View itemLayoutView) {
super(itemLayoutView);
tvName = (TextView) itemLayoutView.findViewById(R.id.tvName);
tvEmailId = (TextView) itemLayoutView.findViewById(R.id.tvEmailId);
chkSelected = (RadioButton) itemLayoutView
.findViewById(R.id.chkSelected);
///here putted code
chkSelected2 = (RadioButton) itemLayoutView
.findViewById(R.id.chkSelected2);
////
checkrgg=(RadioGroup)itemLayoutView.findViewById(R.id.rg);
}
}
// method to access in activity after updating selection
public List<Student> getStudentist() {
return stList;
}
}
コードについて
package com.example.administrator.cardviewcheckbok;
import java.io.Serializable;
public class Student implements Serializable {
/**
*
*/
private static final long serialVersionUID = 1L;
private String name;
private String emailId;
private boolean isSelected;
public Student() {
}
public Student(String name, String emailId) {
this.name = name;
this.emailId = emailId;
}
public Student(String name, String emailId, boolean isSelected) {
this.name = name;
this.emailId = emailId;
this.isSelected = isSelected;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getEmailId() {
return emailId;
}
public void setEmailId(String emailId) {
this.emailId = emailId;
}
public boolean isSelected() {
return isSelected;
}
public void setSelected(boolean isSelected) {
this.isSelected = isSelected;
}
}
コードこれらは大きな問題問題ですしてください。実際にリストを使ってやると同じエラーが出るので、コミュニティからの助けを借りて、これらの問題についていくつかご提案ください。 「リストにあるラジオグループとカードビュー」