Java 将Json数据绑定到条形图
我正在创建一个应用程序,从Web服务获取Json数据并将其绑定到条形图 我不知道怎么做。我正在使用Java 将Json数据绑定到条形图,java,android,json,Java,Android,Json,我正在创建一个应用程序,从Web服务获取Json数据并将其绑定到条形图 我不知道怎么做。我正在使用MPAndroid库制作图表 帮助我从JSON数据绑定条形图数据 网络服务: [ { "NAME": "601 GRIETA EN CUERPO", "PERCENTAGE": "46" }, { "NAME": "77 ENFRIAMIENTO O DUNTING", "PERCENTAGE": "18" }, { "NAME": "78
MPAndroid
库制作图表
帮助我从JSON数据绑定条形图数据
网络服务:
[
{
"NAME": "601 GRIETA EN CUERPO",
"PERCENTAGE": "46"
},
{
"NAME": "77 ENFRIAMIENTO O DUNTING",
"PERCENTAGE": "18"
},
{
"NAME": "78 PRECALENTAMIENTO",
"PERCENTAGE": "18"
},
{
"NAME": "209 MAL MANEJO",
"PERCENTAGE": "9"
},
{
"NAME": "92 FUGA DE MANOMETRO",
"PERCENTAGE": "9"
}
]
柱状图。爪哇
package com.example.saravanakumars.chart;
/**
* Created by saravanakumars on 9/18/2017.
*/
import android.app.ProgressDialog;
import android.content.DialogInterface;
import android.os.AsyncTask;
import android.os.Bundle;
import android.support.v7.app.AlertDialog;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;
import android.view.ContextMenu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.widget.ListAdapter;
import android.widget.ListView;
import android.widget.SimpleAdapter;
import android.widget.TextView;
import android.widget.Toast;
import com.github.mikephil.charting.charts.BarChart;
import com.github.mikephil.charting.data.BarData;
import com.github.mikephil.charting.data.BarDataSet;
import com.github.mikephil.charting.data.BarEntry;
import com.github.mikephil.charting.utils.ColorTemplate;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import java.util.ArrayList;
import java.util.HashMap;
public class barchart extends AppCompatActivity {
BarChart chart ;
ArrayList<BarEntry> BARENTRY ;
ArrayList<String> BarEntryLabels ;
BarDataSet Bardataset ;
BarData BARDATA ;
private String TAG = MainActivity.class.getSimpleName();
private ProgressDialog pDialog;
private ListView lv;
private static String url = "http://113.193.30.155/MobileService/MobileService.asmx/GetSampleData";
ArrayList<HashMap<String, String>> contactList;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.bar_chart);
contactList = new ArrayList<>();
lv = (ListView) findViewById(R.id.list);
new GetContacts().execute();
// bar chart
chart = (BarChart) findViewById(R.id.barchart);
BARENTRY = new ArrayList<>();
BarEntryLabels = new ArrayList<String>();
AddValuesToBARENTRY();
AddValuesToBarEntryLabels();
Bardataset = new BarDataSet(BARENTRY, "Projects");
BARDATA = new BarData(BarEntryLabels, Bardataset);
Bardataset.setColors(ColorTemplate.COLORFUL_COLORS);
chart.setData(BARDATA);
chart.animateY(3000);
}
});
// registerForContextMenu( txt1 );
}
@Override
public void onCreateContextMenu(ContextMenu menu, View v, ContextMenu.ContextMenuInfo menuInfo)
{
super.onCreateContextMenu(menu, v, menuInfo);
MenuInflater inflater = getMenuInflater();
menu.setHeaderTitle("Select The Action");
inflater.inflate( R.menu.popup_menu,menu );
}
@Override
public boolean onContextItemSelected(MenuItem item){
switch (item.getItemId()) {
case R.id.one:
Toast.makeText(barchart.this,"You Clicked : " + item.getTitle(),Toast.LENGTH_SHORT).show();
break;
case R.id.two:
Toast.makeText(barchart.this,"You Clicked : " + item.getTitle(),Toast.LENGTH_SHORT).show();
break;
}
return true;
}
private class GetContacts extends AsyncTask<Void, Void, Void> {
@Override
protected void onPreExecute() {
super.onPreExecute();
// Showing progress dialog
pDialog = new ProgressDialog(barchart.this);
pDialog.setMessage("Please wait...");
pDialog.setCancelable(false);
pDialog.show();
}
@Override
protected Void doInBackground(Void... arg0) {
HttpHandler sh = new HttpHandler();
// Making a request to url and getting response
String jsonStr = sh.makeServiceCall(url);
Log.e(TAG, "Response from url: " + jsonStr);
if (jsonStr != null) {
try {
JSONArray array = new JSONArray(jsonStr);
for (int i = 0; i < array.length(); i++) {
JSONObject object = (JSONObject) array.get(i);
String NAME = object.getString("NAME");
String PERCENTAGE = object.getString("PERCENTAGE");
int minqty = Integer.parseInt(object.getString("PERCENTAGE"));
HashMap<String, String> contact = new HashMap<>();
BARENTRY.add(minqty);
contact.put("NAME", NAME);
contact.put("PERCENTAGE", PERCENTAGE);
// adding contact to contact list
contactList.add(contact);
}
} catch (final JSONException e) {
Log.e(TAG, "Json parsing error: " + e.getMessage());
runOnUiThread(new Runnable() {
@Override
public void run() {
Toast.makeText(getApplicationContext(),
"Json parsing error: " + e.getMessage(),
Toast.LENGTH_LONG)
.show();
}
});
}
} else {
Log.e(TAG, "Couldn't get json from server.");
runOnUiThread(new Runnable() {
@Override
public void run() {
Toast.makeText(getApplicationContext(),
"Couldn't get json from server. Check LogCat for possible errors!",
Toast.LENGTH_LONG)
.show();
}
});
}
return null;
}
@Override
protected void onPostExecute(Void result) {
super.onPostExecute(result);
// Dismiss the progress dialog
if (pDialog.isShowing())
pDialog.dismiss();
/**
}
}
}
package com.example.saravanakumars.chart;
/**
*由saravanakumars于2017年9月18日创建。
*/
导入android.app.ProgressDialog;
导入android.content.DialogInterface;
导入android.os.AsyncTask;
导入android.os.Bundle;
导入android.support.v7.app.AlertDialog;
导入android.support.v7.app.AppActivity;
导入android.util.Log;
导入android.view.ContextMenu;
导入android.view.MenuInflater;
导入android.view.MenuItem;
导入android.view.view;
导入android.widget.ListAdapter;
导入android.widget.ListView;
导入android.widget.simpledapter;
导入android.widget.TextView;
导入android.widget.Toast;
导入com.github.mikephil.charting.charts.BarChart;
导入com.github.mikephil.charting.data.BarData;
导入com.github.mikephil.charting.data.BarDataSet;
导入com.github.mikephil.charting.data.BarEntry;
导入com.github.mikephil.charting.utils.ColorTemplate;
导入org.json.JSONArray;
导入org.json.JSONException;
导入org.json.JSONObject;
导入java.util.ArrayList;
导入java.util.HashMap;
公共类条形图扩展了AppCompatActivity{
柱状图;
ArrayList BARENTRY;
ArrayList Barentrylables;
巴达集巴达集;
巴达塔;
私有字符串标记=MainActivity.class.getSimpleName();
私人对话;
私有ListView lv;
专用静态字符串url=”http://113.193.30.155/MobileService/MobileService.asmx/GetSampleData";
ArrayList联系人列表;
@凌驾
创建时受保护的void(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(右布局条形图);
contactList=新的ArrayList();
lv=(ListView)findViewById(R.id.list);
新建GetContacts().execute();
//条形图
chart=(条形图)findViewById(R.id.BarChart);
BARENTRY=newarraylist();
BarEntryLabels=新的ArrayList();
AddValuesToBARENTRY();
AddValuesToBarEntryLabels();
Bardataset=新的Bardataset(巴伦特里,“项目”);
BARDATA=新的BARDATA(BarentryLables,BARDATA集);
设置颜色(ColorTemplate.Colorbid_COLORS);
图表.设置数据(BARDATA);
查特·阿尼泰(3000);
}
});
//registerForContextMenu(txt1);
}
@凌驾
public void onCreateContextMenu(ContextMenu菜单,视图v,ContextMenu.ContextMenuInfo菜单信息)
{
super.onCreateContextMenu(menu,v,menuInfo);
MenuInflater充气机=getMenuInflater();
菜单。设置标题(“选择动作”);
充气机。充气(右菜单。弹出菜单,菜单);
}
@凌驾
公共布尔值onContextItemSelected(MenuItem项){
开关(item.getItemId()){
案例R.id.1:
您单击的“+item.getTitle(),Toast.LENGTH\u SHORT.show()”;
打破
案例R.id.2:
您单击的“+item.getTitle(),Toast.LENGTH\u SHORT.show()”;
打破
}
返回true;
}
私有类GetContacts扩展异步任务{
@凌驾
受保护的void onPreExecute(){
super.onPreExecute();
//显示进度对话框
pDialog=新建进度对话框(barchart.this);
setMessage(“请稍候…”);
pDialog.setCancelable(假);
pDialog.show();
}
@凌驾
受保护的Void doInBackground(Void…arg0){
HttpHandler sh=新的HttpHandler();
//向url发出请求并获得响应
字符串jsonStr=sh.makeServiceCall(url);
Log.e(标签,“来自url的响应:+jsonStr”);
if(jsonStr!=null){
试一试{
JSONArray数组=新的JSONArray(jsonStr);
对于(int i=0;iYourModelClass yourModelClassObject = gson.fromJson(args[0].toString(), YourModelClass.class);