基于数据库值我正在创建文本字段，单选按钮，复选框。对于复选框，我不知道如何获取相应问题的选定复选框值。
我的代码是..
package com.example.technical14.myapplication;
import android.app.Activity;
import android.app.ProgressDialog;
import android.content.Context;
import android.content.Intent;
import android.content.SharedPreferences;
import android.net.Uri;
import android.os.AsyncTask;
import android.support.annotation.UiThread;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.text.format.DateFormat;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.EditText;
import android.widget.LinearLayout;
import android.widget.RadioButton;
import android.widget.RadioGroup;
import android.widget.TextView;
import android.widget.Toast;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Calendar;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
public class Main2Activity extends Activity {
private static final String Latest_Products = "Questions";
JSONArray productsArray = null;
StringBuilder result;
public static final int CONNECTION_TIMEOUT = 10000;
public static final int READ_TIMEOUT = 15000;
bean b = null;
LinearLayout lView = null;
private List<EditText> le = null;
HashMap<String, bean> hm = null;
private Button b1 = null;
private List<RadioGroup> lrg = null;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
new Asyncchk().execute();
}
private class Asyncchk extends AsyncTask<String, String, StringBuilder> {
ProgressDialog pdLoading = new ProgressDialog(Main2Activity.this);
HttpURLConnection conn;
URL url = null;
@Override
protected void onPreExecute() {
super.onPreExecute();
//this method will be running on UI thread
pdLoading.setMessage("\tLoading...");
pdLoading.setCancelable(false);
pdLoading.show();
}
@Override
protected StringBuilder doInBackground(String... param) {
try {
// Enter URL address where your php file resides
url = new URL("http://192.168.1.33/app/alldata.php");
} catch (MalformedURLException e) {
// TODO Auto-generated catch block
Toast.makeText(getApplicationContext(), "URL Exception", Toast.LENGTH_LONG).show();
e.printStackTrace();
}
try {
// Setup HttpURLConnection class to send and receive data from php and mysql
conn = (HttpURLConnection) url.openConnection();
conn.setReadTimeout(READ_TIMEOUT);
conn.setConnectTimeout(CONNECTION_TIMEOUT);
conn.setRequestMethod("POST");
// setDoInput and setDoOutput method depict handling of both send and receive
conn.setDoInput(true);
conn.setDoOutput(true);
// Append parameters to URL
Uri.Builder builder = new Uri.Builder()
.appendQueryParameter("user_id", "user_id")
.appendQueryParameter("dpt_id", "dptid");
String query = builder.build().getEncodedQuery();
// Open connection for sending data
OutputStream os = conn.getOutputStream();
BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(os, "UTF-8"));
writer.write(query);
writer.flush();
writer.close();
os.close();
conn.connect();
} catch (IOException e1) {
// TODO Auto-generated catch block
Log.e("error","error");
e1.printStackTrace();
}
try {
int response_code = conn.getResponseCode();
// Check if successful connection made
if (response_code == HttpURLConnection.HTTP_OK) {
// Read data sent from server
InputStream input = conn.getInputStream();
BufferedReader reader = new BufferedReader(new InputStreamReader(input));
result = new StringBuilder();
BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(conn.getInputStream()));
String next1;
while ((next1 = bufferedReader.readLine()) != null) {
result.append(next1 + "\n");
}
}
} catch (IOException e) {
e.printStackTrace();
} finally {
conn.disconnect();
}
return result;
}
@Override
protected void onPostExecute(StringBuilder s) {
super.onPostExecute(s);
try{
JSONArray login;
JSONObject obj=new JSONObject(s.toString());
hm = new HashMap<String, bean>();
le = new ArrayList<EditText>();
lrg = new ArrayList<RadioGroup>();
if(s.toString().contains("Result")) {
login = obj.getJSONArray("Result");
int cbid=1;
int cbid1=10000;
lView = new LinearLayout(Main2Activity.this);
for(int i=0;i<login.length();i++)
{
JSONObject c = login.getJSONObject(i);
Log.e("length",c.toString());
productsArray = c.getJSONArray(Latest_Products);
for (int j = 0; j < productsArray.length(); j++) {
b = new bean();
JSONObject cc = productsArray.getJSONObject(j);
if(cc.getString("q_type").equalsIgnoreCase("1")){
b.setQno(j);
b.setQtype(1);
b.setQues(cc.getString("question"));
TextView t1 = new TextView(Main2Activity.this);
t1.setText(cc.getString("question"));
EditText e1 = new EditText(Main2Activity.this);
e1.setWidth(350);
lView.addView(t1);
lView.addView(e1);
lView.setOrientation(LinearLayout.VERTICAL);
le.add(e1);
String qno =Integer.toString(j);
hm.put(qno, b);
}
else if (cc.getString("q_type").equalsIgnoreCase("2")) {
b.setQno(j);
b.setQtype(2);
b.setQues(cc.getString("question"));
TextView t1 = new TextView(Main2Activity.this);
t1.setText(cc.getString("question"));
RadioGroup rg = new RadioGroup(Main2Activity.this);
final RadioButton[] rb = new RadioButton[2];
rg.setOrientation(LinearLayout.HORIZONTAL);
rb[0] = new RadioButton(Main2Activity.this);
rb[1] = new RadioButton(Main2Activity.this);
rb[0].setText(cc.getString("q_opt1"));
// rb[0].setId(cbid+100);
rb[1].setText(cc.getString("q_opt2"));
// rb[1].setId(cbid1+101);
rg.addView(rb[0]);
rg.addView(rb[1]);
lrg.add(rg);
lView.addView(t1);
lView.addView(rg);
lView.setOrientation(LinearLayout.VERTICAL);
String qno =Integer.toString(j);
hm.put(qno, b);
cbid++;
cbid1++;
}
else if (cc.getString("q_type").equalsIgnoreCase("3")) {
b.setQno(j);
b.setQtype(3);
b.setQues(cc.getString("question"));
TextView t1 = new TextView(Main2Activity.this);
t1.setText(cc.getString("question"));
CheckBox[] cb = new CheckBox[2];
CheckBox c1 = new CheckBox(Main2Activity.this);
CheckBox c2 = new CheckBox(Main2Activity.this);
CheckBox c3 = new CheckBox(Main2Activity.this);
c1.setText(cc.getString("q_opt1"));
c2.setText(cc.getString("q_opt2"));
c3.setText(cc.getString("q_opt3"));
lView.addView(t1);
lView.addView(c1);
lView.addView(c2);
lView.addView(c3);
lView.setOrientation(LinearLayout.VERTICAL);
String qno =Integer.toString(j);
hm.put(qno, b);
}
}
}
}
}catch (JSONException e) {
e.printStackTrace();
}
pdLoading.dismiss();
b1 = new Button(Main2Activity.this);
b1.setText("Send Mail");
lView.addView(b1);
setContentView(lView);
b1.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
HashMap<String,String> cc = checkdata(hm);
Sendmail(cc);
}
});
}
}
public HashMap<String, String> checkdata(HashMap h) {
HashMap<String, String> ss = new HashMap<String, String>();
HashMap<String, bean> rh = h;
int l = lrg.size();
String ll = Integer.toString(l);
Log.e("lllllleeeeeeeeee", ll);
int q = 0;
int q1 = 0;
int r = 0;
for (Map.Entry<String, bean> ent : rh.entrySet()) {
String k1 = ent.getKey();
bean bb = ent.getValue();
//Toast.makeText(getApplicationContext(), bb.getQues(), Toast.LENGTH_LONG).show();
if (bb.getQtype() == 1) {
String aa = le.get(q).getText().toString();
Log.e("qtype", aa);
//Toast.makeText(getApplicationContext(), aa, Toast.LENGTH_LONG).show();
ss.put(bb.getQues(), aa);
q++;
} else if (bb.getQtype() == 2) {
int bb1 = lrg.get(q1).getCheckedRadioButtonId();
String qno =Integer.toString(bb1);
Toast.makeText(getApplicationContext(),qno,Toast.LENGTH_SHORT).show();
RadioButton rt = (RadioButton) findViewById(bb1);
//Toast.makeText(getApplicationContext(), rt.getText().toString(), Toast.LENGTH_LONG).show();
ss.put(bb.getQues(), rt.getText().toString());
q1++;
}
}
return ss;
}
public void Sendmail(HashMap s) {
HashMap<String, String> sss = s;
String[] toppings = new String[sss.size()];
int size1 = 0;
for (String key : sss.keySet()) {
toppings[size1] = key + "\n" + sss.get(key) + "\n";
System.out.println("key: " + key + " value: " + sss.get(key));
size1++;
}
StringBuilder builder = new StringBuilder();
for (String s3 : toppings) {
builder.append(s3);
}
String mbody = builder.toString();
Intent i = new Intent(Intent.ACTION_SEND);
i.setType("message/rfc822");
i.putExtra(Intent.EXTRA_EMAIL, "xyz@gmail.com");
i.putExtra(Intent.EXTRA_SUBJECT, "Task Activity");
i.putExtra(Intent.EXTRA_TEXT, mbody);
try {
startActivity(i);
} catch (android.content.ActivityNotFoundException ex) {
Toast.makeText(Main2Activity.this, "There are no email clients installed.", Toast.LENGTH_SHORT).show();
}
}
}
提前致谢。
答案 0 :(得分：0)
您可以通过调用checkBox.isChecked（）获取复选框值，该值将返回true或false。 //编辑： 所以，在代码中你可以添加如下内容：
CheckBox c1 = new CheckBox(Main2Activity.this);
CheckBox c2 = new CheckBox(Main2Activity.this);
CheckBox c3 = new CheckBox(Main2Activity.this);
//API LEVEL 17 REQUIRED
c1.setId(View.generateViewId());
c2.setId(View.generateViewId());
c3.setId(View.generateViewId());
c1.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton compoundButton, boolean isChecked) {
//Here you can track if c1 was checked by using isChecked value
}
});
或者，如前所述，您只需调用c1.isChecked（）即可获取复选框的值。
答案 1 :(得分：0)
建议：不是通过JSON配对解码，而是使用GSON并将其转换为对象列表然后呈现视图
替代解决方案：您可以根据列表中的问题类型使用RecyclerView和Plot View使用不同的持有者，并将数据存储到列表位置
现在来问你的问题：我不知道如何获得相应问题的选中复选框值
您可以获取子计数并将其循环以获取父布局中的所有视图，
从您的hashmap中检查哪个问题...
检查这是否是CheckBox的实例并获取Checked Status和text（我假设您需要发送带问题的答案）
int childCount=lView.getChildCount();
for(int i=0;i<childCount;i++)
{
Object object=lView.getChildAt(i);
if(object instanceof TextView){
//TextView instance
//Your Question find it from your hashmap
}
if(object instanceof CheckBox){
//CheckBox instance
((CheckBox)object).isChecked();
((CheckBox)object).getText();
//as per your requirement
}
if(object instanceof RadioButton) {
//RadioButton instance
}
.
.
.
}