I am getting an error of type org.json.JSONObject cannot be converted to JSONArray. What is wrong with the code? Here are the data for android studio at the bottom. Thanks.
2019-08-08 15:20:47.259 25280-25404/com.example.json3 I/Adreno: PFP: 0x016ee155, ME: 0x00000000
2019-08-08 15:20:47.263 25280-25404/com.example.json3 I/OpenGLRenderer: Initialized EGL, version 1.4
2019-08-08 15:20:47.263 25280-25404/com.example.json3 D/OpenGLRenderer: Swap behavior 2
2019-08-08 15:20:47.268 25280-25404/com.example.json3 D/libGLESv1: STS_GLApi : DTS, ODTC are not allowed for Package : com.example.json3
2019-08-08 15:20:47.270 25280-25404/com.example.json3 D/OpenGLRenderer: eglCreateWindowSurface = 0x789e646be0
2019-08-08 15:20:47.424 25280-25280/com.example.json3 D/ViewRootImpl@41d176b[MainActivity]: MSG_RESIZED_REPORT: frame=Rect(0, 0 - 1440, 2960) ci=Rect(0, 84 - 0, 168) vi=Rect(0, 84 - 0, 168) or=1
2019-08-08 15:20:47.424 25280-25280/com.example.json3 D/ViewRootImpl@41d176b[MainActivity]: MSG_WINDOW_FOCUS_CHANGED 1
2019-08-08 15:20:47.430 25280-25280/com.example.json3 V/InputMethodManager: Starting input: tba=android.view.inputmethod.EditorInfo@3fd8912 nm : com.example.json3 ic=null
2019-08-08 15:20:47.430 25280-25280/com.example.json3 I/InputMethodManager: startInputInner - mService.startInputOrWindowGainedFocus
2019-08-08 15:20:47.447 25280-25280/com.example.json3 V/InputMethodManager: Starting input: tba=android.view.inputmethod.EditorInfo@8a308e3 nm : com.example.json3 ic=null
2019-08-08 15:20:49.102 25280-25280/com.example.json3 D/ViewRootImpl@41d176b[MainActivity]: ViewPostIme pointer 0
2019-08-08 15:20:49.175 25280-25280/com.example.json3 D/ViewRootImpl@41d176b[MainActivity]: ViewPostIme pointer 1
2019-08-08 15:20:49.198 25280-25781/com.example.json3 D/NetworkSecurityConfig: Using Network Security Config from resource network_security_config debugBuild: true
2019-08-08 15:20:49.202 25280-25781/com.example.json3 I/System.out: (HTTPLog)-Static: isSBSettingEnabled false
2019-08-08 15:20:49.202 25280-25781/com.example.json3 I/System.out: (HTTPLog)-Static: isSBSettingEnabled false
2019-08-08 15:20:49.236 25280-25781/com.example.json3 D/TcpOptimizer: TcpOptimizer-ON
2019-08-08 15:20:49.696 25280-25781/com.example.json3 W/System.err: org.json.JSONException: Value {"posts":[{"title":" Ending (Shao Kahn) | Mortal Kombat ","author":"demo2"}]} of type org.json.JSONObject cannot be converted to JSONArray
Main Activity
package com.example.json3;
import androidx.appcompat.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
public class MainActivity extends AppCompatActivity {
Button click;
public static TextView data;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
click = findViewById(R.id.button);
data = findViewById(R.id.fetchdata);
click.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
fetchData process = new fetchData();
process.execute();
}
});
}
}
FETCHDATA CLASS
package com.example.json3;
import android.os.AsyncTask;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
/**
* Created by Abhishek Panwar on 7/14/2017.
*/
public class fetchData extends AsyncTask<Void,Void,Void> {
String data ="";
String dataParsed = "";
String singleParsed ="";
@Override
protected Void doInBackground(Void... voids) {
try {
URL url = new URL("https://api.myjson.com/bins/au02l");
HttpURLConnection httpURLConnection = (HttpURLConnection) url.openConnection();
InputStream inputStream = httpURLConnection.getInputStream();
BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(inputStream));
String line = "";
while(line != null){
line = bufferedReader.readLine();
data = data + line;
}
JSONArray JA = new JSONArray(data);
for(int i =0 ;i <JA.length(); i++)
{
JSONObject JO = (JSONObject) JA.get(i);
singleParsed = "title:" + JO.get("title") + "\n"+
"author:" + JO.get("author") + "\n";
dataParsed = dataParsed + singleParsed +"\n" ;
}
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} catch (JSONException e) {
e.printStackTrace();
}
return null;
}
@Override
protected void onPostExecute(Void aVoid) {
super.onPostExecute(aVoid);
MainActivity.data.setText(this.dataParsed);
}
ACTIVITY_MAIN XML
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity">
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/click_me"
android:layout_marginBottom="10dp"
android:id="@+id/button" />
<ScrollView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_below="@+id/button">
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="@string/fetch_text_here"
android:padding="10dp"
android:textSize="24sp"
android:id="@+id/fetchdata"
/>
</ScrollView>
"{"posts":[{"title":" Ending (Shao Kahn) | Mortal Kombat ","author":"demo2"}]}" is JSONObject , and it's posts attribute is JSONArray
JSONArray JA = new JSONObject(data).get("posts");
for(int i =0 ;i <JA.length(); i++)
{
JSONObject JO = (JSONObject) JA.get(i);
singleParsed = "title:" + JO.get("title") + "\n"+
"author:" + JO.get("author") + "\n";
dataParsed = dataParsed + singleParsed +"\n" ;
}
User contributions licensed under CC BY-SA 3.0