我对android和java相当新。我正在尝试将JSON数据添加到列表视图中。我有JSON数据进入并打印到日志，但我很难将数据导入列表视图。我在行号上尝试过arraylist并且它有效，但是不知道如何在那里获取JSON数据。任何指针或建议都会被暗示。
我正在寻找一个像
的结果（键）ID名称Tourn_ID （值）1 Tournamnet1 MI2016 （值）2 Tournamnet2 UT2016 （值）3 Tournamnet4 USNC2016 等
这是我的代码Java。
import android.os.AsyncTask;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.Toast;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.ArrayList;
import java.util.List;
import java.util.Locale;
import static android.R.*;
import static android.R.layout.simple_list_item_1;
import static java.util.Arrays.asList;
public class MainActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
DownloadTask task = new DownloadTask();
task.execute("http://www.goalballscoreboard.net/mobile/downloads/WebServices/Tournnames/Tournnames.php?rows=all");
ListView tournListView = (ListView) findViewById(R.id.tournListView);
final ArrayList<String> myTournList = new ArrayList<String>(asList("ROW 1", "ROW 2", "Row3"));
ArrayAdapter<String> arrayAdapter = new ArrayAdapter<String>(this, simple_list_item_1, myTournList);
tournListView.setAdapter(arrayAdapter);
}
public class DownloadTask extends AsyncTask<String, Void, String> {
@Override
protected String doInBackground(String... urls) {
String result = "";
URL url;
HttpURLConnection urlConnection = null;
try {
url = new URL(urls[0]);
urlConnection = (HttpURLConnection) url.openConnection();
InputStream in = urlConnection.getInputStream();
InputStreamReader reader = new InputStreamReader(in);
int data = reader.read();
while (data != -1) {
char current = (char) data;
result += current;
data = reader.read();
}
return result;
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return null;
}
@Override
protected void onPostExecute(String result) {
super.onPostExecute(result);
try {
JSONObject jsonObject = new JSONObject(result);
String tournInfo = jsonObject.getString("posts");
Log.i("Tourn INFO", tournInfo);
JSONArray arr = new JSONArray(tournInfo);
List<String> list = new ArrayList<String>();
for (int i = 0; i < arr.length(); i++) {
JSONObject jsonPart = arr.getJSONObject(i);
JSONObject jsonObjectPost = jsonPart.getJSONObject("post");
//Log.i("Each Tournament Object", jsonPart.getString("post"));
Log.i("ID", jsonObjectPost.getString("ID"));
Log.i("Name of Tournament", jsonObjectPost.getString("NAME"));
Log.i("TOURN_ID", jsonObjectPost.getString("TOURN_ID"));
String id = jsonObjectPost.get("ID").toString();
String name = jsonObjectPost.get("NAME").toString();
String tournID = jsonObjectPost.get("TOURN_ID").toString();
list.add(jsonObjectPost.getString("ID") + ", " + jsonObjectPost.getString("NAME") + "," + jsonObjectPost.getString("TOURN_ID") + "\n");
}
System.out.println("" + list.toString());
} catch (JSONException e) {
e.printStackTrace();
}
}
}
}
答案 0 :(得分：1)
创建名为Model.java
public class Model {
public String ID ;
public String Name;
public Tourn_ID;
}
现在在解析数据时
ArrayList<Model> modelArrayList = new ArrayList();
for (int i = 0; i < arr.length(); i++) {
JSONObject jsonPart = arr.getJSONObject(i);
JSONObject jsonObjectPost = jsonPart.getJSONObject("post");
Model model;
model.ID = jsonObjectPost.get("ID").toString();
model.Name = jsonObjectPost.get("NAME").toString();
Model.Tourn_ID = jsonObjectPost.get("TOURN_ID").toString();
modelArrayList .add(model);
}
<强> Adapter.java
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;
public class CustomAdapter extends BaseAdapter{
ArrayList<Model> result = new ArrayList();
Context context;
int [] imageId;
private static LayoutInflater inflater=null;
public CustomAdapter(Context context, ArrayList<Model> result) {
// TODO Auto-generated constructor stub
this.result=result;
this.context=context;
inflater = ( LayoutInflater )context.
getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}
@Override
public int getCount() {
// TODO Auto-generated method stub
return result.size;
}
@Override
public Object getItem(int position) {
// TODO Auto-generated method stub
return position;
}
@Override
public long getItemId(int position) {
// TODO Auto-generated method stub
return position;
}
public class Holder
{
TextView tv,tv2,tv3;
}
@Override
public View getView(final int position, View convertView, ViewGroup parent) {
// TODO Auto-generated method stub
Holder holder=new Holder();
View rowView;
rowView = inflater.inflate(R.layout.custom_adapter, null);
holder.tv=(TextView) rowView.findViewById(R.id.textView1);
holder.tv2=(TextView) rowView.findViewById(R.id.textView2);
holder.tv3=(TextView) rowView.findViewById(R.id.textView3);
holder.tv.setText(result[position].ID);
holder.tv2.setText(result[position].Name);
holder.tv3.setText(result[position].Tour_ID);
rowView.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
Toast.makeText(context, "You Clicked "+result[position], Toast.LENGTH_LONG).show();
}
});
return rowView;
}
}
<?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="horizontal" >
<TextView
android:id="@+id/textView1"
android:layout_gravity="center"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="25dp"
android:text="TextView" />
<TextView
android:id="@+id/textView2"
android:layout_gravity="center"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="25dp"
android:text="TextView" />
<TextView
android:id="@+id/textView3"
android:layout_gravity="center"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="25dp"
android:text="TextView" />
</LinearLayout>
现在 listview
listview = (Listview).findViewById(R.id.idOfYpurListview);
Adapter adapter = new Adapter(Activity.this,modelArrayList);
listview.setAdapter(adapter);