how to read json file from assets folder in android

if the question as json array like follwing

[{"questionId":"Q18868","questionValue":"What is the minimum age for obtaining an Alabama driver license?","choice1":"At least 16 years.","choice2":"At least 17 years.","choice3":"At least 18 years.","choice4":"At least 19 years.","answer":"1","imageName":"NA"},{"questionId":"Q18873","questionValue":"Whether Alabama license may be issued to persons under age 19 years, without secondary school graduation or current attendance?","choice1":"No.","choice2":"Yes.","choice3":"Yes, on special permission.","choice4":"Any thing else.","answer":"1","imageName":"NA"},{"questionId":"Q19001","questionValue":"For how many moving traffic violations on a GDL (graduated driver license), you license will be suspended?","choice1":"1 or more.","choice2":"2 or more.","choice3":"3 or more.","choice4":"4 or more.","answer":"2","imageName":"NA"},{"questionId":"Q19323","questionValue":"For which persons Graduated Driver License (GDL) system is not applicable?","choice1":"Persons aged 18 years or older.","choice2":"Persons aged 17 or older with valid driver license for 6 months.","choice3":"Persons aged 16 or older, who are married or head of a household.","choice4":"All the above persons.","answer":"4","imageName":"NA"},{"questionId":"Q19324","questionValue":"Whether persons who have been legally relieved of minority status, is eligible for GDL system?","choice1":"NO.","choice2":"Yes.","choice3":"Yes, if under 16 years.","choice4":"Any thing else.","answer":"1","imageName":"NA"},{"questionId":"Q19325","questionValue":"Who should accompany a person aged 15 years with learner\u0027s license in the vehicle, while driving?","choice1":"A parent or legal guardian.","choice2":"A licensed driver aged 21 years or older.","choice3":"A licensed or certified driving instructor.","choice4":"Any one of the above persons.","answer":"4","imageName":"NA"},{"questionId":"Q19326","questionValue":"In which seat of the vehicle, the person accompanying the driver aged 15 years with learner\u0027s license should sit?","choice1":"Seat next to the driver.","choice2":"Any front seat.","choice3":"Seat behind the driver.","choice4":"Any where else.","answer":"1","imageName":"NA"}]

JsonParser .java

package com.alabama;

import java.io.IOException;

import java.io.InputStream;

import java.util.ArrayList;

import org.json.JSONArray;

import org.json.JSONException;

import org.json.JSONObject;

import android.app.Activity;

public class JsonParser {

String fileName;

Activity activity;

public JsonParser(Activity activity,String fileName) {

this.activity=activity;

this.fileName=fileName;

}

public ArrayList<QuestBeen> getQuestion() {

ArrayList<QuestBeen> list=new ArrayList<QuestBeen>();

JSONArray array;

try {

array = new JSONArray(loadJSONFromAsset());

for(int i=0;i<array.length();i++){

JSONObject json_data = array.getJSONObject(i);

QuestBeen been=new QuestBeen();

been.setQuestionId(json_data.getString("questionId"));

been.setQuestionValue(json_data.getString("questionValue"));

been.setChoice1(json_data.getString("choice1"));

been.setChoice2(json_data.getString("choice2"));

been.setChoice3(json_data.getString("choice3"));

been.setChoice4(json_data.getString("choice4"));

been.setAnswer(json_data.getString("answer"));

list.add(been);

}

} catch (JSONException e) {

e.printStackTrace();

}

return list;

}

public String loadJSONFromAsset() {

   String json = null;

   try { 

       InputStream is = activity.getAssets().open(fileName);

       int size = is.available();

       byte[] buffer = new byte[size];

       is.read(buffer);

       is.close();

       json = new String(buffer, "UTF-8");

   } catch (IOException ex) {

       ex.printStackTrace();

       return null; 

   } 

   return json;

}

}

reading files in the activity

package com.alabama;

import java.util.ArrayList;

import android.app.Activity;

import android.content.Intent;

import android.os.Bundle;

import android.util.Log;

import android.view.View;

import android.view.View.OnClickListener;

import android.widget.Button;

import android.widget.RadioButton;

import android.widget.RadioGroup;

import android.widget.RadioGroup.OnCheckedChangeListener;

import android.widget.TextView;

import android.widget.Toast;

public class TestActivity extends Activity{

int ans=0;

int id=0;

int rightValue=0;

ArrayList<QuestBeen> question;

JsonParser parser;

TextView textViewQuestion,textViewHead;

RadioGroup group;

RadioButton choice1,choice2,choice3,choice4;

Button buttonPrev,buttonNext;

int pos;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_test);

pos=getIntent().getExtras().getInt("position");

pos=10+pos;

parser=new JsonParser(TestActivity.this,"QC"+pos+".json");

System.out.println("--------------------------");

Log.d("json ", parser.loadJSONFromAsset().toString());

question=parser.getQuestion();

GUI();

}

private void GUI() {

textViewQuestion=(TextView)findViewById(R.id.textViewQuestion);

textViewHead=(TextView)findViewById(R.id.textViewHead);

group=(RadioGroup)findViewById(R.id.radioGroup1);

choice1=(RadioButton)findViewById(R.id.radio0);

choice2=(RadioButton)findViewById(R.id.radio1);

choice3=(RadioButton)findViewById(R.id.radio2);

choice4=(RadioButton)findViewById(R.id.radio3);

textViewHead.setText("1/"+question.size());

ConstantValues.totaQuestin=question.size();

buttonPrev=(Button)findViewById(R.id.button1);

buttonNext=(Button)findViewById(R.id.button2);

setVal();

group.setOnCheckedChangeListener(new OnCheckedChangeListener() {

@Override

public void onCheckedChanged(RadioGroup group, int checkedId) {

RadioButton rb = (RadioButton) group.findViewById(checkedId);

 

 

int radioButtonID = group.getCheckedRadioButtonId();

View radioButton = group.findViewById(radioButtonID);

int idx = group.indexOfChild(radioButton);

if(idx==ans){

rightValue=1;

}

else

rightValue=0;  

//Toast.makeText(getApplicationContext(), idx+"---", Toast.LENGTH_SHORT).show();

}

});

buttonNext.setOnClickListener(new OnClickListener() {

@Override

public void onClick(View v) {

ConstantValues.answers.add(id,rightValue);

id++;

Log.d("question", id+"--");

if(id<=question.size()-1)

setVal();

else{

Toast.makeText(getApplicationContext(), "Result", Toast.LENGTH_SHORT).show();

Intent intent=new Intent(TestActivity.this,ResultActivity.class);

startActivity(intent);

}

Log.d("-----------", ConstantValues.answers.toString());

}

});

buttonPrev.setOnClickListener(new OnClickListener() {

@Override

public void onClick(View v) {

id--;

Log.d("question", id+"--");

if(id<=0){

id=0;

Toast.makeText(getApplicationContext(), "No Questions", Toast.LENGTH_SHORT).show();

}

else

setVal();

}

});

}

private void setVal() {

ans=Integer.parseInt(question.get(id).getAnswer());

group.clearCheck();

textViewHead.setText(id+"/"+question.size());

textViewQuestion.setText(question.get(id).getQuestionValue());

choice1.setText(question.get(id).getChoice1());

choice2.setText(question.get(id).getChoice2());

choice3.setText(question.get(id).getChoice3());

choice4.setText(question.get(id).getChoice4());

}

 

}

Android Custom Calendar

CalendarAdapter.java

import android.content.Context;
import android.graphics.Color;

import java.text.SimpleDateFormat;
import java.util.Collections;
import java.util.GregorianCalendar;

import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.TextView;

import java.text.DateFormat;
import java.util.ArrayList;
import java.util.HashSet;
import java.util.List;
import java.util.Locale;
import java.util.Map;
import java.util.Set;




/** * Created by Mafiree on 11/7/2016. */
public class CalendarAdapter extends BaseAdapter {
    private Context mContext;

    private java.util.Calendar month;
    public GregorianCalendar pmonth; // calendar instance for previous month    /**     * calendar instance for previous month for getting complete view     */    public GregorianCalendar pmonthmaxset;
    private GregorianCalendar selectedDate;
    int firstDay;
    int maxWeeknumber;
    int maxP;
    int calMaxP;
    int lastWeekDay;
    int leftDays;
    int mnthlength;
    String itemvalue, curentDateString;
    DateFormat df;

    private ArrayList<String> items;
    public static List<String> dayString;
    private View previousView;

    public CalendarAdapter(Context c, GregorianCalendar monthCalendar) {

        CalendarAdapter.dayString = new ArrayList<String>();
        month = monthCalendar;
        selectedDate = (GregorianCalendar) monthCalendar.clone();
        mContext = c;
        month.set(GregorianCalendar.DAY_OF_MONTH, 1);
        this.items = new ArrayList<String>();
        df = new SimpleDateFormat("yyyy-MM-dd", Locale.US);
        curentDateString = df.format(selectedDate.getTime());
        refreshDays();
    }

    public void setItems(ArrayList<String> items) {
        for (int i = 0; i != items.size(); i++) {
            if (items.get(i).length() == 1) {
                items.set(i, "0" + items.get(i));
            }
        }
        this.items = items;
    }

    public int getCount() {
        return dayString.size();
    }

    public Object getItem(int position) {
        return dayString.get(position);
    }

    public long getItemId(int position) {
        return 0;
    }

    // create a new view for each item referenced by the Adapter    public View getView(int position, View convertView, ViewGroup parent) {
        View v = convertView;
        TextView dayView;
        if (convertView == null) { // if it's not recycled, initialize some            // attributes            LayoutInflater vi = (LayoutInflater) mContext
                    .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
            v = vi.inflate(R.layout.calendar_item, null);

        }
        dayView = (TextView) v.findViewById(R.id.date);
        // separates daystring into parts.        String[] separatedTime = dayString.get(position).split("-");
        // taking last part of date. ie; 2 from 2012-12-02        String gridvalue = separatedTime[2].replaceFirst("^0*", "");
        // checking whether the day is in current month or not.        if ((Integer.parseInt(gridvalue) > 1) && (position < firstDay)) {
            // setting offdays to white color.            dayView.setTextColor(Color.WHITE);
            dayView.setClickable(false);
            dayView.setFocusable(false);
        } else if ((Integer.parseInt(gridvalue) < 7) && (position > 28)) {
            dayView.setTextColor(Color.WHITE);
            dayView.setClickable(false);
            dayView.setFocusable(false);
        } else {
            // setting curent month's days in blue color.            dayView.setTextColor(Color.BLUE);
        }

        if (dayString.get(position).equals(curentDateString)) {
            setSelected(v);
            previousView = v;
        } else {
           // v.setBackgroundResource(R.drawable.list_item_background);        }
        dayView.setText(gridvalue);

        // create date string for comparison        String date = dayString.get(position);

        if (date.length() == 1) {
            date = "0" + date;
        }
        String monthStr = "" + (month.get(GregorianCalendar.MONTH) + 1);
        if (monthStr.length() == 1) {
            monthStr = "0" + monthStr;
        }

        // show icon if date is not empty and it exists in the items array        ImageView iw = (ImageView) v.findViewById(R.id.date_icon);
        if (date.length() > 0 && items != null && items.contains(date)) {
            iw.setVisibility(View.VISIBLE);
        } else {
            iw.setVisibility(View.INVISIBLE);
        }
        return v;
    }

    public View setSelected(View view) {
        if (previousView != null) {
            //previousView.setBackgroundResource(R.drawable.list_item_background);        }
        previousView = view;
      //  view.setBackgroundResource(R.drawable.calendar_cel_selectl);        return view;
    }

    public void refreshDays() {
        // clear items        items.clear();
        dayString.clear();
        pmonth = (GregorianCalendar) month.clone();
        // month start day. ie; sun, mon, etc        firstDay = month.get(GregorianCalendar.DAY_OF_WEEK);
        // finding number of weeks in current month.        maxWeeknumber = month.getActualMaximum(GregorianCalendar.WEEK_OF_MONTH);
        // allocating maximum row number for the gridview.        mnthlength = maxWeeknumber * 7;
        maxP = getMaxP(); // previous month maximum day 31,30....        calMaxP = maxP - (firstDay - 1);// calendar offday starting 24,25 ...        /**         * Calendar instance for getting a complete gridview including the three         * month's (previous,current,next) dates.         */        pmonthmaxset = (GregorianCalendar) pmonth.clone();
        /**         * setting the start date as previous month's required date.         */        pmonthmaxset.set(GregorianCalendar.DAY_OF_MONTH, calMaxP + 1);

        /**         * filling calendar gridview.         */        for (int n = 0; n < mnthlength; n++) {

            itemvalue = df.format(pmonthmaxset.getTime());
            pmonthmaxset.add(GregorianCalendar.DATE, 1);
            dayString.add(itemvalue);

        }
    }

    private int getMaxP() {
        int maxP;
        if (month.get(GregorianCalendar.MONTH) == month
                .getActualMinimum(GregorianCalendar.MONTH)) {
            pmonth.set((month.get(GregorianCalendar.YEAR) - 1),
                    month.getActualMaximum(GregorianCalendar.MONTH), 1);
        } else {
            pmonth.set(GregorianCalendar.MONTH,
                    month.get(GregorianCalendar.MONTH) - 1);
        }
        maxP = pmonth.getActualMaximum(GregorianCalendar.DAY_OF_MONTH);

        return maxP;
    }

}





public class CalendarView extends Activity {

public GregorianCalendar month, itemmonth;


 public CalendarAdapter adapter;// adapter instance
 public Handler handler;// for grabbing some event values for showing the dot
       // marker.
 public ArrayList<String> items; // container to store calendar items which
         // needs showing the event marker

 public void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.calendar);

 month = (GregorianCalendar) GregorianCalendar.getInstance();
itemmonth = (GregorianCalendar) month.clone();

  items = new ArrayList<String>();
  adapter = new CalendarAdapter(this, month);

  GridView gridview = (GridView) findViewById(R.id.gridview);
  gridview.setAdapter(adapter);

  handler = new Handler();
  handler.post(calendarUpdater);

  TextView title = (TextView) findViewById(R.id.title);
  title.setText(android.text.format.DateFormat.format("MMMM yyyy", month));

  RelativeLayout previous = (RelativeLayout) findViewById(R.id.previous);

  previous.setOnClickListener(new OnClickListener() {

   @Override
   public void onClick(View v) {
    setPreviousMonth();
    refreshCalendar();
   }
  });

  RelativeLayout next = (RelativeLayout) findViewById(R.id.next);
  next.setOnClickListener(new OnClickListener() {

   @Override
   public void onClick(View v) {
    setNextMonth();
    refreshCalendar();

   }
  });

  gridview.setOnItemClickListener(new OnItemClickListener() {
   public void onItemClick(AdapterView<?> parent, View v,
     int position, long id) {

    ((CalendarAdapter) parent.getAdapter()).setSelected(v);
    String selectedGridDate = CalendarAdapter.dayString
      .get(position);
    String[] separatedTime = selectedGridDate.split("-");
    String gridvalueString = separatedTime[2].replaceFirst("^0*",
      "");// taking last part of date. ie; 2 from 2012-12-02.
    int gridvalue = Integer.parseInt(gridvalueString);
    // navigate to next or previous month on clicking offdays.
    if ((gridvalue > 10) && (position < 8)) {
     setPreviousMonth();
     refreshCalendar();
    } else if ((gridvalue < 7) && (position > 28)) {
     setNextMonth();
     refreshCalendar();
    }
    ((CalendarAdapter) parent.getAdapter()).setSelected(v);

    showToast(selectedGridDate);

   }
  });
 }

 protected void setNextMonth() {
  if (month.get(Calendar.MONTH) == month.getActualMaximum(Calendar.MONTH)) {
   month.set((month.get(Calendar.YEAR) + 1),
     month.getActualMinimum(Calendar.MONTH), 1);
  } else {
   month.set(Calendar.MONTH, month.get(Calendar.MONTH) + 1);
  }

 }

 protected void setPreviousMonth() {
  if (month.get(Calendar.MONTH) == month.getActualMinimum(Calendar.MONTH)) {
   month.set((month.get(Calendar.YEAR) - 1),
     month.getActualMaximum(Calendar.MONTH), 1);
  } else {
   month.set(Calendar.MONTH, month.get(Calendar.MONTH) - 1);
  }

 }

 protected void showToast(String string) {
  Toast.makeText(this, string, Toast.LENGTH_SHORT).show();

 }

 public void refreshCalendar() {
  TextView title = (TextView) findViewById(R.id.title);

  adapter.refreshDays();
  adapter.notifyDataSetChanged();
  handler.post(calendarUpdater); // generate some calendar items

  title.setText(android.text.format.DateFormat.format("MMMM yyyy", month));
 }

 public Runnable calendarUpdater = new Runnable() {

  @Override
  public void run() {
   items.clear();

   // Print dates of the current week
   DateFormat df = new SimpleDateFormat("yyyy-MM-dd");
   String itemvalue;
   for (int i = 0; i < 7; i++) {
    itemvalue = df.format(itemmonth.getTime());
    itemmonth.add(Calendar.DATE, 1);
    items.add("2012-09-12");
    items.add("2012-10-07");
    items.add("2012-10-15");
    items.add("2012-10-20");
    items.add("2012-11-30");
    items.add("2012-11-28");
   }

   adapter.setItems(items);
   adapter.notifyDataSetChanged();
  }
 };
}

Making TextView scrollable in Android

final TextView tv = new TextView(this);
tv.setBackgroundResource(R.drawable.splash);
tv.setTypeface(face);
tv.setTextSize(18);
tv.setTextColor(R.color.BROWN);
tv.setGravity(Gravity.CENTER_VERTICAL| Gravity.CENTER_HORIZONTAL);
tv.setOnTouchListener(new OnTouchListener() {
    public boolean onTouch(View v, MotionEvent e) {
        Random r = new Random();
        int i = r.nextInt(101);
        if (e.getAction() == e.ACTION_DOWN) {
            tv.setText(tips[i]);
            tv.setBackgroundResource(R.drawable.inner);
        }
        return true;
    }
});
setContentView(tv);

PagerAdapter Class

This is the main activity

myPagerAdapter=new MyPagerAdapter(TopNewsAcivity.this,arrayList);
verticalViewPager=(VerticalViewPager)findViewById(R.id.view_pager);
verticalViewPager.setAdapter(myPagerAdapter);

For dynamic PagerAdapter

MyPagerAdapter .class

package news.com.mynews.adapter;

import android.app.Activity;
import android.graphics.Color;
import android.graphics.Typeface;
import android.support.v4.view.PagerAdapter;
import android.support.v7.widget.ActionBarOverlayLayout.LayoutParams;
import android.text.Html;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.ImageView.ScaleType;
import android.widget.LinearLayout;
import android.widget.TextView;

import com.squareup.picasso.Picasso;

import java.util.ArrayList;

import news.com.mynews.R;
import news.com.mynews.bean.NewsBean;

/** * Created by Mafiree on 12/19/2016. *///http://android-er.blogspot.in/2014/04/example-of-viewpager-with-custom.htmlpublic class MyPagerAdapter extends PagerAdapter {


    int NumberOfPages = 5;

    int[] res = {
            android.R.drawable.ic_dialog_alert,
            android.R.drawable.ic_menu_camera,
            android.R.drawable.ic_menu_compass,
            android.R.drawable.ic_menu_directions,
            android.R.drawable.ic_menu_gallery};
    int[] backgroundcolor = {
            0xFF101010,
            0xFF202020,
            0xFF303030,
            0xFF404040,
            0xFF505050};

    Activity activity;
    ArrayList<NewsBean> list;

    public MyPagerAdapter(Activity activity,ArrayList<NewsBean> list) {
        this.activity=activity;
        this.list=list;
    }

    @Override
    public int getCount() {
        //return NumberOfPages;        return list.size();
    }

    @Override
    public boolean isViewFromObject(View view, Object object) {
        return view == object;
    }

    @Override
    public Object instantiateItem(ViewGroup container, int position) {

        ImageView imageView=new ImageView(activity);
        imageView.setScaleType(ScaleType.FIT_XY);

        TextView textView = new TextView(activity);
        textView.setTextColor(Color.BLACK);
       // textView.setTextSize(18);        textView.setTypeface(Typeface.DEFAULT_BOLD);
        //textView.setText(String.valueOf(position));      //  textView.setText(list.get(position).getTitle());        int n=200;
        String upToNCharacters = list.get(position).getDescription().substring(0, Math.min(list.get(position).getDescription().length(), n));

        textView.setText(Html.fromHtml("<h2>"+list.get(position).getTitle()+"</h2><br><p>"+upToNCharacters+" here</p>"));

        TextView textContent=new TextView(activity);
//        textContent.setText(Color.WHITE);        textContent.setTextColor(Color.GRAY);
       // textContent.setTextSize(16);       // textContent.setText(Html.fromHtml("<h2>Title</h2><br><p>Description here</p>"));        System.out.println("*******************************************");
        String imageUrl=null;
        imageUrl="http://bestcinema.in/wp-content/uploads/"+list.get(position).getImageURL();
       
        try {
            Picasso.with(activity).load(imageUrl).resize(250,350).into(imageView);
        }catch (Exception e){
            e.printStackTrace();
        }

        LayoutParams imageParams = new LayoutParams(
                LayoutParams.MATCH_PARENT,LayoutParams.WRAP_CONTENT);
        imageView.setLayoutParams(imageParams);

        LinearLayout layout = new LinearLayout(activity);
        layout.setOrientation(LinearLayout.VERTICAL);
        LayoutParams layoutParams = new LayoutParams(
                LayoutParams.MATCH_PARENT,LayoutParams.MATCH_PARENT);
        //layout.setBackgroundColor(Color.BLUE);        layout.setLayoutParams(layoutParams);

        layout.addView(imageView);
        layout.addView(textView);
        layout.addView(textContent);

        final int page = position;
        layout.setPadding(7,7,7,7);


        LinearLayout layoutBotom = new LinearLayout(activity);
        layoutBotom.setOrientation(LinearLayout.HORIZONTAL);
        LayoutParams layoutParamsBottom = new LayoutParams(
                LayoutParams.MATCH_PARENT,LayoutParams.MATCH_PARENT);
        //layout.setBackgroundColor(Color.BLUE);        layoutBotom.setLayoutParams(layoutParamsBottom);


        ImageView imageViewShare=new ImageView(activity);
        imageViewShare.setBackgroundResource(R.drawable.ic_menu_share);

        ImageView imageViewSend=new ImageView(activity);
        imageViewSend.setBackgroundResource(R.drawable.ic_menu_send);

        layoutBotom.addView(imageViewShare);
        layoutBotom.addView(imageViewSend);

        layout.addView(layoutBotom);

        container.addView(layout);
        return layout;
    }

    @Override
    public void destroyItem(ViewGroup container, int position, Object object) {
        container.removeView((LinearLayout)object);
    }


}


For Static PagerAdapter





class CustomPagerAdapter extends PagerAdapter {



    Context mContext;

    LayoutInflater mLayoutInflater;



    public CustomPagerAdapter(Context context) {

        mContext = context;

        mLayoutInflater = (LayoutInflater) mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);

    }



    @Override

    public int getCount() {

        return mResources.length;

    }



    @Override

    public boolean isViewFromObject(View view, Object object) {

        return view == ((LinearLayout) object);

    }



    @Override

    public Object instantiateItem(ViewGroup container, int position) {

        View itemView = mLayoutInflater.inflate(R.layout.pager_item, container, false);



        ImageView imageView = (ImageView) itemView.findViewById(R.id.imageView);

        imageView.setImageResource(mResources[position]);



        container.addView(itemView);



        return itemView;

    }



    @Override

    public void destroyItem(ViewGroup container, int position, Object object) {

        container.removeView((LinearLayout) object);

    }

}