Shadow's Shadow is me :): October 2014

Let's consider personality application where going to display actor's name, actor's description, actor's image etc.,

Let's take a json sample form this link..

https://dl.dropboxusercontent.com/s/jv2trufpmgr2gjz/actors.json?dl=0

Structure looks like this..

{
  "actors": [
    {
      "name": "Brad Pitt",
      "description": "William Bradley 'Brad' Pitt is an American actor and film producer. He has received a Golden Globe Award, a Screen Actors Guild Award, and three Academy Award nominations in acting categories",
      "dob": "December 18, 1963",
      "country": "United States",
      "height": "1.80 m",
      "spouse": "Jennifer Aniston",
      "children": "Shiloh Nouvel Jolie-Pitt, Maddox Chivan Jolie-Pitt",
      "image": "http://microblogging.wingnity.com/JSONParsingTutorial/brad.jpg"
    },
    
    {
      "name": "Will Smith",
      "description": "Willard Carroll 'Will' Smith, Jr. is an American actor, producer, and rapper. He has enjoyed success in television, film, and music.",
      "dob": "September 25, 1968",
      "country": "United States",
      "height": "1.88 m",
      "spouse": "Jada Pinkett Smith",
      "children": "Jaden Smith, Willow Smith, Trey Smith",
      "image": "http://microblogging.wingnity.com/JSONParsingTutorial/will.jpg"
    }
  ]
}

Persons.java:

public class Persons {
private String name;
private String description;
private String dob;

private String country;
private String height;
private String spouse;
private String children;
private String image;
public Persons(){

}
public Persons(String name,String description,String dob,String country,String height,String spouse,String children, String image){
this.name=name;
this.description=description;
this.dob=dob;
this.country=country;
this.height=height;
this.spouse=spouse;
this.children=children;
this.spouse=spouse;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getDob() {
return dob;
}
public void setDob(String dob) {
this.dob = dob;
}
public String getDescription() {
return description;
}
public void setDescription(String description) {
this.description = description;
}
public String getCountry() {
return country;
}
public void setCountry(String country) {
this.country = country;
}
public String getHeight() {
return height;
}
public void setHeight(String height) {
this.height = height;
}
public String getSpouse() {
return spouse;
}
public void setSpouse(String spouse) {
this.spouse = spouse;
}
public String getImage() {
return image;
}
public void setImage(String image) {
this.image = image;
}
public String getChildren() {
return children;
}
public void setChildren(String children) {
this.children = children;
}

}

GridUI.java:

import java.io.IOException;
import java.util.ArrayList;

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.util.EntityUtils;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;

import com.personality.caches.ImageLoader;

import android.app.Activity;
import android.app.ProgressDialog;
import android.net.ParseException;
import android.os.AsyncTask;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.GridView;
import android.widget.Toast;

public class GridUI extends Activity {
ArrayList<Persons> personsList;
GridView gridView;
GridAdapter gridAdapter;
private static final String url="https://dl.dropboxusercontent.com/s/jv2trufpmgr2gjz/actors.json?dl=0";
private ImageLoader loader;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.gridview);
personsList= new ArrayList<Persons>();
new JSONAsyncTask().execute(url);
gridView=(GridView)findViewById(R.id.gridview);
loader=new ImageLoader(GridUI.this);
gridAdapter = new GridAdapter(this, R.layout.gridview_row, personsList);
gridView.setAdapter(gridAdapter);

}
class JSONAsyncTask extends AsyncTask<String, Void, Boolean> {
ProgressDialog dialog;
@Override
protected void onPreExecute() {
// TODO Auto-generated method stub
super.onPreExecute();
dialog=new ProgressDialog(GridUI.this);
dialog.setMessage("Loading, please wait");
dialog.setTitle("Connecting server");
dialog.show();
dialog.setCancelable(false);

}

@Override
protected Boolean doInBackground(String... urls) {
try {

//------------------>>
HttpGet httppost = new HttpGet(urls[0]);
HttpClient httpclient = new DefaultHttpClient();
HttpResponse response = httpclient.execute(httppost);

// StatusLine stat = response.getStatusLine();
int status = response.getStatusLine().getStatusCode();

if(status==200){
HttpEntity entity = response.getEntity();
String data = EntityUtils.toString(entity);

JSONObject jsono=new JSONObject(data);
JSONArray jarray = jsono.getJSONArray("actors");
for (int i = 0; i < jarray.length(); i++) {
JSONObject object = jarray.getJSONObject(i);

Persons actor = new Persons();

actor.setName(object.getString("name"));
actor.setDescription(object.getString("description"));
actor.setDob(object.getString("dob"));
actor.setCountry(object.getString("country"));
actor.setHeight(object.getString("height"));
actor.setSpouse(object.getString("spouse"));
actor.setChildren(object.getString("children"));
actor.setImage(object.getString("image"));

personsList.add(actor);
}
return true;
}

//------------------>>

} catch (ParseException e1) {
e1.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} catch (JSONException e) {
e.printStackTrace();
}
return false;
}

@Override
protected void onPostExecute(Boolean result) {
// TODO Auto-generated method stub
super.onPostExecute(result);
dialog.cancel();
gridAdapter.notifyDataSetChanged();
if(result == false)
Toast.makeText(getApplicationContext(), "Unable to fetch data from server", Toast.LENGTH_LONG).show();
}

}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.splash, menu);
return true;
}

@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
}

GridAdapter.java:

import java.io.InputStream;
import java.util.ArrayList;
import java.util.List;

import com.personality.caches.ImageLoader;

import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.AsyncTask;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;

public class GridAdapter extends BaseAdapter {
public ImageLoader loader;
private final ArrayList<Persons> itemLists;
public static final String NAME="name";
public static final String DOB="dob";
public static final String HEIGHT="height";
public static final String COUNTRY="country";
public static final String DESCRIPTION="description";
public static final String SPOUSE="spouse";
public static final String CHILDREN="children";
public static final String image="image";

LayoutInflater layoutInflater;
int Resource;
ViewHolder viewHolder;
Activity activity;

public GridAdapter(Activity a, int resource, ArrayList<Persons> itemList) {
layoutInflater = (LayoutInflater) a
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
Resource = resource;
itemLists=itemList;
activity=a;
loader=new ImageLoader(a.getApplicationContext());

}
@Override
public int getCount() {
return itemLists.size();

}

@Override
public Object getItem(int position) {
return itemLists.get(position);
}
@Override
public long getItemId(int position) {
return position;

}

@Override
public View getView(int position, View convertView, ViewGroup parent) {
View v= convertView;
try {
if(v==null){
viewHolder = new ViewHolder();
v = layoutInflater.inflate(Resource, null);
viewHolder.tvName=(TextView)v.findViewById(R.id.tvname);
viewHolder.imageview=(SquareImageView)v.findViewById(R.id.picture);
v.setTag(viewHolder);

}
else{
viewHolder = (ViewHolder) v.getTag();

}

final String actorImage=itemLists.get(position).getImage();
final String name=itemLists.get(position).getName();
final String dob=itemLists.get(position).getDob();
final String height=itemLists.get(position).getHeight();
final String country=itemLists.get(position).getCountry();
final String description=itemLists.get(position).getDescription();
final String spouse=itemLists.get(position).getSpouse();
final String children=itemLists.get(position).getChildren();
final String search = itemLists.get(position).getName().toString();

// Ion.with(viewHolder.imageview).placeholder(R.drawable.ic_launcher).error(R.drawable.ic_launcher).load(actorImage);
viewHolder.tvName.setText(itemLists.get(position).getName());
loader.DisplayImage(actorImage,viewHolder.imageview);
itemLists.get(position).getImage();
viewHolder.imageview.setOnClickListener(new View.OnClickListener() {

@Override
public void onClick(View arg0) {

if(search.contains("Brad Pitt")){
Toast.makeText(activity, "Bradss", Toast.LENGTH_SHORT)
.show();}
else{
}
// TODO Auto-generated method stub
Intent intent=new Intent(activity,DetailsActivity.class);
intent.putExtra(NAME, name);
intent.putExtra(DOB, dob);
intent.putExtra(HEIGHT, height);
intent.putExtra(COUNTRY, country);
intent.putExtra(DESCRIPTION, description);
intent.putExtra(SPOUSE, spouse);
intent.putExtra(CHILDREN, children);
intent.putExtra(image, actorImage);
activity.startActivity(intent);

}
});
// TODO Auto-generated method stub
}
catch (Exception ex) {
ex.printStackTrace();
}
return v;
}
static class ViewHolder {
public SquareImageView imageview;
public TextView tvName;

}

}

gridview.xml:

<?xml version="1.0" encoding="utf-8"?>

<FrameLayout

xmlns:android="http://schemas.android.com/apk/res/android"

android:layout_width="match_parent"

android:layout_height="match_parent">

<GridView

android:id="@+id/gridview"

android:layout_width="match_parent"

android:layout_height="match_parent"

android:verticalSpacing="0dp"

android:horizontalSpacing="0dp"

android:stretchMode="columnWidth"

android:numColumns="2" />

</FrameLayout>

gridviewrow.xml:

<?xml version="1.0" encoding="utf-8"?>

<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"

android:layout_width="match_parent"

android:layout_height="match_parent">

<com.personality.SquareImageView

android:id="@+id/picture"

android:layout_width="match_parent"

android:layout_height="match_parent"

android:scaleType="centerCrop"

<TextView

android:id="@+id/tvname"

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:paddingLeft="10dp"

android:paddingRight="10dp"

android:paddingTop="15dp"

android:paddingBottom="15dp"

android:layout_gravity="bottom"

android:textColor="@android:color/white"

android:background="#55000000"

</FrameLayout>

DetailsActivity.java:

package com.personality;

import com.personality.caches.ImageLoader;

import android.app.Activity;

import android.os.Bundle;

import android.widget.ImageView;

import android.widget.TextView;

public class DetailsActivity extends Activity {

ImageView imageView;

TextView name,dob,height,country,description,spouse,children;

private Bundle bundle;

public ImageLoader loader;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.details);

loader=new ImageLoader(DetailsActivity.this);

name=(TextView)findViewById(R.id.tvName);

dob=(TextView)findViewById(R.id.tvDateOfBirth);

height=(TextView)findViewById(R.id.tvHeight);

country=(TextView)findViewById(R.id.tvCountry);

description=(TextView)findViewById(R.id.tvDescriptionn);

spouse=(TextView)findViewById(R.id.tvSpouse);

children=(TextView)findViewById(R.id.tvChildren);

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

bundle = this.getIntent().getExtras();

if(bundle != null && bundle.containsKey(GridAdapter.NAME) && bundle.containsKey(GridAdapter.CHILDREN) && bundle.containsKey(GridAdapter.COUNTRY) && bundle.containsKey(GridAdapter.DESCRIPTION) && bundle.containsKey(GridAdapter.DOB)&& bundle.containsKey(GridAdapter.HEIGHT) && bundle.containsKey(GridAdapter.image) && bundle.containsKey(GridAdapter.SPOUSE)){

String names=bundle.getString(GridAdapter.NAME);

String childrens=bundle.getString(GridAdapter.CHILDREN);

String dobs=bundle.getString(GridAdapter.DOB);

String heights=bundle.getString(GridAdapter.HEIGHT);

String countrys=bundle.getString(GridAdapter.COUNTRY);

String descriptions=bundle.getString(GridAdapter.DESCRIPTION);

String spouses=bundle.getString(GridAdapter.SPOUSE);

String images=bundle.getString(GridAdapter.image);

name.setText(names);

dob.setText(dobs);

children.setText(childrens);

height.setText(heights);

country.setText(countrys);

description.setText(descriptions);

spouse.setText(spouses);

loader.DisplayImage(images,imageView);

}

details.xml:

<?xml version="1.0" encoding="utf-8"?>

<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"

android:layout_width="fill_parent"

android:layout_height="wrap_content" >

<LinearLayout

android:id="@+id/LinearLayouts"

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:padding="4dp"

android:orientation="vertical">

<LinearLayout

android:layout_width="match_parent"

android:layout_height="wrap_content" >

<LinearLayout

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:orientation="vertical" >

<LinearLayout

android:layout_width="300dp"

android:layout_height="300dp"

<ImageView

android:id="@+id/ivImage"

android:layout_width="match_parent"

android:layout_height="match_parent"

android:layout_margin="10dp"

android:layout_gravity="center"

android:src="@drawable/ic_launcher" />

</LinearLayout>

<TextView

android:id="@+id/tvName"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_margin="5dp"

android:text="Tom Cruise"

android:textColor="#166CED"

android:textAppearance="?android:attr/textAppearanceLarge" />

<TextView

android:id="@+id/tvDateOfBirth"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:textColor="#D64530"

android:text="Date of Birth: July 3, 1962" />

<TextView

android:id="@+id/tvHeight"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:text="Height: 1.80 m"

android:textColor="#D64530"

android:textAppearance="?android:attr/textAppearanceSmall" />

<TextView

android:id="@+id/tvCountry"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:textColor="#D64530"

android:text="United States" />

</LinearLayout>

<TextView

android:id="@+id/tvDescriptionn"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:textColor="#009A57"

android:text="Description" />

<TextView

android:id="@+id/tvSpouse"

android:layout_width="wrap_content" android:textColor="#166CED"

android:layout_height="wrap_content"

android:text="Spouse: Katie Holmes" />

<TextView

android:id="@+id/tvChildren"

android:layout_width="wrap_content" android:textColor="#166CED"

android:layout_height="wrap_content"

android:text="Children: Suri Cruise, Isabella Jane Cruise, Connor Cruise" />

</LinearLayout>

</ScrollView>

Add imageLoader.jar files.

FileCache.java:

import java.io.File;

import android.content.Context;

public class FileCache {

private File cacheDir;

public FileCache(Context context){

//Find the dir to save cached images

if (android.os.Environment.getExternalStorageState().equals(android.os.Environment.MEDIA_MOUNTED))

cacheDir=new File(android.os.Environment.getExternalStorageDirectory(),"TTImages_cache");

else

cacheDir=context.getCacheDir();

if(!cacheDir.exists())

cacheDir.mkdirs();

}

public File getFile(String url){

//I identify images by hashcode. Not a perfect solution, good for the demo.

String filename=String.valueOf(url.hashCode());

//Another possible solution (thanks to grantland)

//String filename = URLEncoder.encode(url);

File f = new File(cacheDir, filename);

return f;

}

public void clear(){

File[] files=cacheDir.listFiles();

if(files==null)

return;

for(File f:files)

f.delete();

}

imageLoader.java:

import java.io.File;

import java.io.FileInputStream;

import java.io.FileNotFoundException;

import java.io.FileOutputStream;

import java.io.InputStream;

import java.io.OutputStream;

import java.net.HttpURLConnection;

import java.net.URL;

import java.util.Collections;

import java.util.Map;

import java.util.WeakHashMap;

import java.util.concurrent.ExecutorService;

import java.util.concurrent.Executors;

import com.personality.R;

import android.app.Activity;

import android.content.Context;

import android.graphics.Bitmap;

import android.graphics.BitmapFactory;

import android.widget.ImageView;

public class ImageLoader {

ImageLoader imageLoader;

MemoryCache memoryCache=new MemoryCache();

FileCache fileCache;

private Map<ImageView, String> imageViews=Collections.synchronizedMap(new WeakHashMap<ImageView, String>());

ExecutorService executorService;

public ImageLoader(Context context){

fileCache=new FileCache(context);

executorService=Executors.newFixedThreadPool(5);

}

final int stub_id=R.drawable.ic_launcher;

public void DisplayImage(String url, ImageView imageView)

{

imageViews.put(imageView, url);

Bitmap bitmap=memoryCache.get(url);

if(bitmap!=null)

imageView.setImageBitmap(bitmap);

else

{

queuePhoto(url, imageView);

imageView.setImageResource(stub_id);

}

private void queuePhoto(String url, ImageView imageView)

{

PhotoToLoad p=new PhotoToLoad(url, imageView);

executorService.submit(new PhotosLoader(p));

}

private Bitmap getBitmap(String url)

{

File f=fileCache.getFile(url);

//from SD cache

Bitmap b = decodeFile(f);

if(b!=null)

return b;

//from web

try {

Bitmap bitmap=null;

URL imageUrl = new URL(url);

HttpURLConnection conn = (HttpURLConnection)imageUrl.openConnection();

conn.setConnectTimeout(30000);

conn.setReadTimeout(30000);

conn.setInstanceFollowRedirects(true);

InputStream is=conn.getInputStream();

OutputStream os = new FileOutputStream(f);

Utils.CopyStream(is, os);

os.close();

bitmap = decodeFile(f);

return bitmap;

} catch (Throwable ex){

ex.printStackTrace();

if(ex instanceof OutOfMemoryError)

memoryCache.clear();

return null;

}

//decodes image and scales it to reduce memory consumption

private Bitmap decodeFile(File f){

try {

//decode image size

BitmapFactory.Options o = new BitmapFactory.Options();

o.inJustDecodeBounds = true;

BitmapFactory.decodeStream(new FileInputStream(f),null,o);

//Find the correct scale value. It should be the power of 2.

final int REQUIRED_SIZE=200;

int width_tmp=o.outWidth, height_tmp=o.outHeight;

int scale=1;

while(true){

if(width_tmp/2<REQUIRED_SIZE || height_tmp/2<REQUIRED_SIZE)

break;

width_tmp/=2;

height_tmp/=2;

scale*=2;

}

//decode with inSampleSize

BitmapFactory.Options o2 = new BitmapFactory.Options();

o2.inSampleSize=scale;

return BitmapFactory.decodeStream(new FileInputStream(f), null, o2);

} catch (FileNotFoundException e) {}

return null;

}

//Task for the queue

private class PhotoToLoad

{

public String url;

public ImageView imageView;

public PhotoToLoad(String u, ImageView i){

url=u;

imageView=i;

}

class PhotosLoader implements Runnable {

PhotoToLoad photoToLoad;

PhotosLoader(PhotoToLoad photoToLoad){

this.photoToLoad=photoToLoad;

}

@Override

public void run() {

if(imageViewReused(photoToLoad))

return;

Bitmap bmp=getBitmap(photoToLoad.url);

memoryCache.put(photoToLoad.url, bmp);

if(imageViewReused(photoToLoad))

return;

BitmapDisplayer bd=new BitmapDisplayer(bmp, photoToLoad);

Activity a=(Activity)photoToLoad.imageView.getContext();

a.runOnUiThread(bd);

}

boolean imageViewReused(PhotoToLoad photoToLoad){

String tag=imageViews.get(photoToLoad.imageView);

if(tag==null || !tag.equals(photoToLoad.url))

return true;

return false;

}

//Used to display bitmap in the UI thread

class BitmapDisplayer implements Runnable

{

Bitmap bitmap;

PhotoToLoad photoToLoad;

public BitmapDisplayer(Bitmap b, PhotoToLoad p){bitmap=b;photoToLoad=p;}

public void run()

{

if(imageViewReused(photoToLoad))

return;

if(bitmap!=null)

photoToLoad.imageView.setImageBitmap(bitmap);

else

photoToLoad.imageView.setImageResource(stub_id);

}

public void pause(){

imageLoader.pause();

}

public void resume(){

imageLoader.resume();

}

public void stop() {

imageLoader.stop();

}

MemoryCache.java:

import java.util.Collections;

import java.util.Iterator;

import java.util.LinkedHashMap;

import java.util.Map;

import java.util.Map.Entry;

import android.graphics.Bitmap;

import android.util.Log;

public class MemoryCache {

private static final String TAG = "MemoryCache";

private Map<String, Bitmap> cache=Collections.synchronizedMap(

new LinkedHashMap<String, Bitmap>(10,1.5f,true));//Last argument true for LRU ordering

private long size=0;//current allocated size

private long limit=1000000;//max memory in bytes

public MemoryCache(){

//use 25% of available heap size

setLimit(Runtime.getRuntime().maxMemory()/4);

}

public void setLimit(long new_limit){

limit=new_limit;

Log.i(TAG, "MemoryCache will use up to "+limit/1024./1024.+"MB");

}

public Bitmap get(String id){

try{

if(!cache.containsKey(id))

return null;

//NullPointerException sometimes happen here http://code.google.com/p/osmdroid/issues/detail?id=78

return cache.get(id);

}catch(NullPointerException ex){

ex.printStackTrace();

return null;

}

public void put(String id, Bitmap bitmap){

try{

if(cache.containsKey(id))

size-=getSizeInBytes(cache.get(id));

cache.put(id, bitmap);

size+=getSizeInBytes(bitmap);

checkSize();

}catch(Throwable th){

th.printStackTrace();

}

private void checkSize() {

Log.i(TAG, "cache size="+size+" length="+cache.size());

if(size>limit){

Iterator<Entry<String, Bitmap>> iter=cache.entrySet().iterator();//least recently accessed item will be the first one iterated

while(iter.hasNext()){

Entry<String, Bitmap> entry=iter.next();

size-=getSizeInBytes(entry.getValue());

iter.remove();

if(size<=limit)

break;

}

Log.i(TAG, "Clean cache. New size "+cache.size());

}

public void clear() {

try{

//NullPointerException sometimes happen here http://code.google.com/p/osmdroid/issues/detail?id=78

cache.clear();

size=0;

}catch(NullPointerException ex){

ex.printStackTrace();

}

long getSizeInBytes(Bitmap bitmap) {

if(bitmap==null)

return 0;

return bitmap.getRowBytes() * bitmap.getHeight();

}

Utils.java:

import java.io.InputStream;

import java.io.OutputStream;

public class Utils {

public static void CopyStream(InputStream is, OutputStream os)

{

final int buffer_size=1024;

try

{

byte[] bytes=new byte[buffer_size];

for(;;)

{

int count=is.read(bytes, 0, buffer_size);

if(count==-1)

break;

os.write(bytes, 0, count);

}

catch(Exception ex){}

}

Shadow's Shadow is me :)

Sunday, 12 October 2014

How to parse Json file and display result in android?

About Me

Popular Posts