我正在制作一个回收视图,每个项目包含3个单选按钮。所以你必须从每个项目中只选择一个单选按钮。我的问题是我不知道如何为每个单选按钮创建一个侦听器,我想把这个选项保存在我的mysql数据库中。下面是我的java类,它工作得很好:
public class GererVoteInvite extends AppCompatActivity {
private ArrayList<VoteItem> itemArrayList; //List items Array
private MyAppAdapter myAppAdapter; //Array Adapter
private RecyclerView recyclerView; //RecyclerView
private RecyclerView.LayoutManager mLayoutManager;
private boolean success = false; // boolean
private static final String DB_URL = "jdbc:mysql://10.0.2.2/mvoting_db_1.0.0.0";
// private static final String DB_URL = "jdbc:mysql://172.16.24.25/mvoting_db_1.0.0.0"; //"jdbc:mysql://DATABASE_IP/DATABASE_NAME";
private static final String USER = "mootaz";
private static final String PASS = "mootaz";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_gerer_vote_invite);
recyclerView = (RecyclerView) findViewById(R.id.recyclerView); //REcyclerview Declaration
recyclerView.setHasFixedSize(true);
// use a linear layout manager
mLayoutManager = new LinearLayoutManager(this);
recyclerView.setLayoutManager(mLayoutManager);
itemArrayList = new ArrayList<VoteItem>(); // Arraylist Initialization
// Calling Async Task
SyncData orderData = new SyncData();
orderData.execute("");
}
// Async Task has three overrided methods,
private class SyncData extends AsyncTask<String, String, String>
{
String msg = "Internet/DB_Credentials/Windows_FireWall_TurnOn Error, See Android Monitor in the bottom For details!";
ProgressDialog progress;
@Override
protected void onPreExecute() //Starts the progress dailog
{
progress = ProgressDialog.show(GererVoteInvite.this, "Synchronising",
"RecyclerView Loading! Please Wait...", true);
}
@Override
protected String doInBackground(String... strings) // Connect to the database, write query and add items to array list
{
try
{
Class.forName("com.mysql.jdbc.Driver");
Connection conn = DriverManager.getConnection(DB_URL, USER, PASS); //Connection Object
if (conn == null)
{
success = false;
}
else {
// Change below query according to your own database.
String query = "SELECT lib_probleme , lib_solution_1 , lib_solution_2 , lib_solution_3 FROM reunion JOIN probleme JOIN solution WHERE reunion.id_reunion=probleme.id_reunion and probleme.id_probleme=solution.id_probleme ;";
Statement stmt = conn.createStatement();
java.sql.ResultSet rs = stmt.executeQuery(query);
if (rs != null) // if resultset not null, I add items to itemArraylist using class created
{
while (rs.next())
{
try {
itemArrayList.add(new VoteItem(rs.getString("lib_probleme"),rs.getString("lib_solution_1"),rs.getString("lib_solution_2"),rs.getString("lib_solution_3")));
} catch (Exception ex) {
ex.printStackTrace();
}
}
msg = "Found";
success = true;
} else {
msg = "No Data found!";
success = false;
}
}
} catch (Exception e)
{
e.printStackTrace();
Writer writer = new StringWriter();
e.printStackTrace(new PrintWriter(writer));
msg = writer.toString();
success = false;
}
return msg;
}
@Override
protected void onPostExecute(String msg) // disimissing progress dialoge, showing error and setting up my gridview
{
progress.dismiss();
Toast.makeText(GererVoteInvite.this, msg + "", Toast.LENGTH_LONG).show();
if (success == false)
{
}
else {
try
{
myAppAdapter = new MyAppAdapter(itemArrayList , GererVoteInvite.this);
recyclerView.setAdapter(myAppAdapter);
} catch (Exception ex)
{
}
}
}
}
public class MyAppAdapter extends RecyclerView.Adapter<MyAppAdapter.ViewHolder> {
private List<VoteItem> values;
public Context context;
public class ViewHolder extends RecyclerView.ViewHolder
{
public TextView txtProbleme;
public RadioGroup group;
public RadioButton txtSol1;
public RadioButton txtSol2;
public RadioButton txtSol3;
public View layout;
public ViewHolder(View v)
{
super(v);
layout = v;
group= (RadioGroup) v.findViewById(R.id.radio_group);
txtProbleme = (TextView) v.findViewById(R.id.tv_probleme);
txtSol1 = (RadioButton) v.findViewById(R.id.rb_1);
txtSol2 = (RadioButton) v.findViewById(R.id.rb_2);
txtSol3 = (RadioButton) v.findViewById(R.id.rb_3);
}
}
// Constructor
public MyAppAdapter(List<VoteItem> myDataset,Context context)
{
values = myDataset;
this.context = context;
}
// Create new views (invoked by the layout manager) and inflates
@Override
public MyAppAdapter.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType)
{
// create a new view
LayoutInflater inflater = LayoutInflater.from(parent.getContext());
View v = inflater.inflate(R.layout.vote_view, parent, false);
ViewHolder vh = new ViewHolder(v);
return vh;
}
// Binding items to the view
private RadioButton lastCheckedRB = null;
@Override
public void onBindViewHolder(ViewHolder holder, final int position) {
final VoteItem voteItem = values.get(position);
holder.txtProbleme.setText(voteItem.getProbleme());
holder.group.setTag(position);
holder.txtSol1.setText(voteItem.getSol1());
holder.txtSol2.setText(voteItem.getSol2());
holder.txtSol3.setText(voteItem.getSol3());
}
// get item count returns the list item count
@Override
public int getItemCount() {
return values.size();
}
}
}
请任何人帮我解决这个问题。
1条答案
按热度按时间n3ipq98p1#
使…成为一个物体
VoteItem
在如下适配器中,向voteitem类添加一个属性://输入适配器
voteitem项目;
然后为它创建getter和setter方法:
现在为您的radiogroup对象设置侦听器:
现在可以在活动中获取当前voteitem对象:
现在将数据保存在本地数据库中,如下所示:
-->制作一个方法保存到数据库类中的数据,如下所示(这只是一个示例,您可以根据需要编辑此方法):
-->在你的
setmVoteItem(VoteItem mVoteItem)
从数据库类方法调用上述方法以保存如下数据: