Android Tutorials: December 2016

ListView Example using php MySQL.

listview_example.php

<?php

define('HOST','mysql.hostinger.in');

define('USER','u532517283_user');

define('PASS','your_password ');

define('DB','u532517283_bdm');

$con = mysqli_connect(HOST,USER,PASS,DB);

$sql = "select * from ListViewExample";

$res = mysqli_query($con,$sql);

$result = array();

while($row = mysqli_fetch_array($res)){

array_push($result,

array('item_id'=>$row[0],

'item_name'=>$row[1],

'image'=>'http://compliments.esy.es/images/uploads/'.$row[2]

));

}

echo json_encode(array("result"=>$result));

mysqli_close($con);

bulid.gradle

compile 'com.loopj.android:android-async-http:1.4.5'
compile 'com.squareup.picasso:picasso:2.4.0'
compile files("${android.getSdkDirectory().getAbsolutePath()}" + File.separator + "platforms" + File.separator + "android-23" + File.separator + "optional" + File.separator + "org.apache.http.legacy.jar")

AndroidManifest.xml

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

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

    package="com.listvieweaxmple">



    <uses-permission android:name="android.permission.INTERNET" />

    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />



    <application

        android:allowBackup="true"

        android:icon="@mipmap/ic_launcher"

        android:label="@string/app_name"

        android:supportsRtl="true"

        android:theme="@style/AppTheme">

        <activity android:name=".MainActivity">

            <intent-filter>

                <action android:name="android.intent.action.MAIN" />



                <category android:name="android.intent.category.LAUNCHER" />

            </intent-filter>

        </activity>

        <activity android:name=".NextPage">

            <meta-data

                android:name="android.support.PARENT_ACTIVITY"

                android:value=".MainActivity" />

        </activity>

    </application>



</manifest>

MainActivity.java

package com.listvieweaxmple;



import android.app.ProgressDialog;

import android.content.Intent;

import android.os.Bundle;

import android.support.v7.app.AppCompatActivity;

import android.view.MenuItem;

import android.view.View;

import android.widget.AdapterView;

import android.widget.ListView;

import android.widget.Toast;

import com.loopj.android.http.AsyncHttpClient;

import com.loopj.android.http.JsonHttpResponseHandler;

import org.apache.http.Header;

import org.apache.http.entity.StringEntity;

import org.json.JSONArray;

import org.json.JSONException;

import org.json.JSONObject;

import java.util.ArrayList;



public class MainActivity extends AppCompatActivity {



    ArrayList<class_items> mArrayList;

    ListView mListView;



    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);



        mArrayList = new ArrayList<class_items>();

        mListView = (ListView) findViewById(R.id.listview);

        get();

    }

    private void get() {

        AsyncHttpClient client = new AsyncHttpClient();

        client.addHeader("Accept", "application/json");

        StringEntity mStringEntity = null;

        client.post(this, "http://compliments.esy.es/listview_example.php", mStringEntity, "application/json", new JsonHttpResponseHandler() {

            ProgressDialog mProgressDialog;

            @Override

            public void onSuccess(int statusCode, Header[] headers, JSONObject response) {

                super.onSuccess(statusCode, headers, response);

                try {

                    JSONArray mJsonArray = response.getJSONArray("result");

                    JSONObject object;

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

                        object = mJsonArray.getJSONObject(i);

                        mArrayList.add(new class_items(

                                object.getString("item_id"),

                                object.getString("item_name"),

                                object.getString("image")));

                    }

                    mListView.setAdapter(new List_View_Adaptor(MainActivity.this, mArrayList));

                } catch (JSONException e) {

                    e.printStackTrace();

                }

            }

            @Override

            public void onFailure(int statusCode, Header[] headers, Throwable throwable, JSONObject errorResponse) {

                Toast.makeText(MainActivity.this, "Data Connection error", Toast.LENGTH_SHORT).show();

                super.onFailure(statusCode, headers, throwable, errorResponse);

            }

            @Override

            public void onStart() {

                super.onStart();

                mProgressDialog = ProgressDialog.show(MainActivity.this, "Loading", "Please Wait", true, false);

            }

            @Override

            public void onFinish() {

                super.onFinish();

                if (mProgressDialog.isShowing()) {

                    mProgressDialog.dismiss();

                }

            }

        });

        mListView.setOnItemClickListener(new AdapterView.OnItemClickListener() {

            @Override

            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {

                class_items items = (class_items) parent.getItemAtPosition(position);

                Intent intent=new Intent(MainActivity.this,NextPage.class);

                intent.putExtra("item_name",items.item_name);

                intent.putExtra("image",items.image);

                startActivity(intent);

            }

        });

    }

    @Override

    public boolean onOptionsItemSelected(MenuItem item) {

        switch (item.getItemId()) {

            case android.R.id.home:

                // app icon in action bar clicked; goto parent activity.

                this.finish();

                return true;

            default:

                return super.onOptionsItemSelected(item);

        }

    }

}

List_View_Adaptor.java

package com.listvieweaxmple;



import android.content.Context;

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 com.squareup.picasso.Picasso;

import java.util.ArrayList;



public class List_View_Adaptor extends BaseAdapter {

    Context mContext;

    ArrayList<class_items> mArrayList;

    LayoutInflater mLayoutInflater;



    public List_View_Adaptor(Context mContext, ArrayList<class_items> mArrayList) {

        this.mContext = mContext;

        this.mArrayList = mArrayList;

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

    }

    @Override

    public int getCount() {

        return mArrayList.size();

    }

    @Override

    public Object getItem(int position) {

        return mArrayList.get(position);

    }

    @Override

    public long getItemId(int position) {

        return position;

    }

    @Override

    public View getView(int position, View convertView, ViewGroup parent)

    {

        list_items_view item;

        if(convertView==null)

        {

            convertView=mLayoutInflater.inflate(R.layout.listview_item,null);

            item=new list_items_view((ImageView)convertView.findViewById(R.id.imageView),

                    (TextView)convertView.findViewById(R.id.textView));

            convertView.setTag(item);

        }

        else

        {

            item=(list_items_view)convertView.getTag();

        }

        String str=mArrayList.get(position).image;

        Picasso.with(mContext).load(str).into(item.getImg1());

        item.getTv1().setText(mArrayList.get(position).getItem_name());

        return convertView;

    }

}

class_items.java

package com.listvieweaxmple;



public class class_items {

    public String image;

    public String item_id;

    public String item_name;

    public class_items(String item_id, String item_name, String image)

    {

        this.item_id = item_id;

        this.item_name = item_name;

        this.image = image;



    }

    public String getImage() {   return image;    }

    public void setImage(String image) {  this.image = image;    }

    public String getItem_id() {  return item_id;    }

    public void setItem_id(String item_id) {       this.item_id = item_id;    }

    public String getItem_name() {         return item_name;    }

}

list_items_view.java

package com.listvieweaxmple;



import android.widget.ImageView;

import android.widget.TextView;



public class list_items_view{

    ImageView img1;

    TextView tv1;



    public list_items_view(ImageView img1, TextView tv1)

    {

        this.img1 = img1;

        this.tv1 = tv1;

    }



    public ImageView getImg1() {

        return img1;

    }

    public void setImg1(ImageView img1) {

        this.img1 = img1;

    }

    public TextView getTv1() {

        return tv1;

    }

    public void setTv1(TextView tv1) {

        this.tv1 = tv1;

    }

}

NextPage.java

package com.listvieweaxmple;



import android.content.Intent;

import android.support.v7.app.AppCompatActivity;

import android.os.Bundle;

import android.widget.ImageView;

import android.widget.TextView;

import com.squareup.picasso.Picasso;



public class NextPage extends AppCompatActivity {

    String item_name,image;

    TextView item_name_txt;

    ImageView image_view;

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_next_page);

        Intent i = getIntent();

        item_name= i.getStringExtra("item_name");

        image = i.getStringExtra("image");

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

        item_name_txt.setText(item_name);

        image_view =(ImageView)findViewById(R.id.image_view);

        Picasso.with(this).load(image).into(image_view);

    }

}

activity_main.xml

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

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

    xmlns:tools="http://schemas.android.com/tools"

    android:layout_width="match_parent"

    android:layout_height="match_parent"

    android:paddingBottom="@dimen/activity_vertical_margin"

    android:paddingLeft="@dimen/activity_horizontal_margin"

    android:paddingRight="@dimen/activity_horizontal_margin"

    android:paddingTop="@dimen/activity_vertical_margin"

    tools:context=".MainActivity">



    <ListView

        android:layout_width="match_parent"

        android:layout_height="match_parent"

        android:id="@+id/listview"

        android:layout_alignParentLeft="true"

        android:layout_alignParentStart="true" />

</RelativeLayout>

Listview_item.xml

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

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

    android:orientation="vertical" android:layout_width="match_parent"

    android:layout_height="wrap_content">

    <FrameLayout

        android:layout_width="match_parent"

        android:layout_height="wrap_content"

        android:id="@+id/Frame1">

        <ImageView

            android:layout_width="match_parent"

            android:layout_height="100dp"

            android:id="@+id/imageView"

            android:background="#80383838"

            android:layout_margin="10dp"

            android:scaleType="fitXY"/>

        <ImageView

            android:layout_width="match_parent"

            android:layout_height="101dp"

            android:id="@+id/imageView1"

            android:layout_margin="10dp"

            android:scaleType="fitXY" />

        <TextView

            android:layout_width="match_parent"

            android:layout_height="match_parent"

            android:id="@+id/textView"

            android:layout_gravity="center"

            android:hint="title"

            android:gravity="center_vertical|center|center_horizontal"

            android:typeface="serif"

            android:textColor="#000000"

            android:textSize="25dp"

            android:layout_margin="10dp" />

    </FrameLayout>

</RelativeLayout>

Activity_next_page.xml

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

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

    xmlns:tools="http://schemas.android.com/tools"

    android:id="@+id/activity_next_page"

    android:layout_width="match_parent"

    android:layout_height="match_parent"

    android:paddingBottom="@dimen/activity_vertical_margin"

    android:paddingLeft="@dimen/activity_horizontal_margin"

    android:paddingRight="@dimen/activity_horizontal_margin"

    android:paddingTop="@dimen/activity_vertical_margin"

    tools:context="com.listvieweaxmple.NextPage"

    android:gravity="center">





    <ImageView

        android:layout_width="match_parent"

        android:layout_height="match_parent"

        android:id="@+id/image_view"/>



    <TextView

        android:layout_width="match_parent"

        android:layout_height="wrap_content"

        android:id="@+id/item_name_txt"

        android:hint="item name"

        android:textSize="30sp"

        android:gravity="center"

        android:layout_centerVertical="true"

        android:layout_alignParentLeft="true"

        android:layout_alignParentStart="true" />

</RelativeLayout>

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