OLEETECH

Android Full Screen Mode And Hide Action Bar Programatiacally And Manually

     // Set fullscreen
        this.getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
                WindowManager.LayoutParams.FLAG_FULLSCREEN);
 
        // Set No Title
        this.requestWindowFeature(Window.FEATURE_NO_TITLE);

Method 2 : One way is using Theme.Holo.Light.NoActionBar.Fullscreen value in AndroidManifest.xml file. (Use the appropriate theme name whichever you used in your application)



<activity android:name=".MainActivity"
    android:label="@string/app_name"
    android:theme="@android:style/Theme.Holo.Light.NoActionBar.Fullscreen">
</activity>

Android List View Populate With xml String Array

Mainactivity.xml

<?xml version=”1.0” encoding=”utf-8”?>
<LinearLayout xmlns:android=”http://schemas.android.com/apk/res/android”
    android:layout_width=”fill_parent”
    android:layout_height=”fill_parent”
    android:orientation=”vertical” >
 
     <ListView
        android:id=”@+id/sportsList”
        android:layout_width=”match_parent”
        android:layout_height=”wrap_content” 
        android:entries="@array/sports_array"
    />
</LinearLayout>

Here @array/sports_array” Is Array Define In res/values/string.xml . Open res/values/string.xml and replace it with following content.

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <string name="hello">Hello World, ListViewActivity1!</string>
    <string name="app_name">ListViewDemo</string>
     <string-array name="sports_array">
        <item>Shuttle Badminton</item>
        <item>Tennis</item>
        <item>FootBall</item>
        <item>Basket Ball</item>
        <item>Table Tennis</item>
        <item>Chess</item>
        <item>Hockey</item>
    </string-array>
</resources>

3. To Set Onclick Listener You Can Modify Your MainActivity.java Like This WAy

public class ListViewActivity1 extends Activity implements OnItemClickListener{
    ListView listView;
     
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
         
        listView = (ListView) findViewById(R.id.sportsList);
        listView.setOnItemClickListener(this);        
    }
 
    /*
     * Parameters:
        adapter - The AdapterView where the click happened.
        view - The view within the AdapterView that was clicked
        position - The position of the view in the adapter.
        id - The row id of the item that was clicked.
     */
    @Override
    public void onItemClick(AdapterView<?> adapter, View view, int position, long id) {
        Toast.makeText(getApplicationContext(), ((TextView) view).getText(),
                  Toast.LENGTH_SHORT).show();
    }
}

Some Open Ftp For Download Software And Games And Others

Android Volley Json Array Data Show In Listview Using Arrayadapter

1.Add Volley Lirary to app build.gradle file.

    implementation 'com.android.volley:volley:1.1.1'

2.Add Internet Permission In Manifest File.

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

3.Add Listview in activity.main.xml file .

<ListView
    android:id="@+id/list"
    android:layout_width="match_parent"
    android:layout_height="match_parent"></ListView>

4. Mainactivity.java File.

package com.example.myapplication;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.ArrayAdapter;
import android.widget.ListView;

import com.android.volley.Request;
import com.android.volley.RequestQueue;
import com.android.volley.Response;
import com.android.volley.VolleyError;
import com.android.volley.toolbox.JsonArrayRequest;
import com.android.volley.toolbox.Volley;

import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;

import java.util.ArrayList;

public class MainActivity extends AppCompatActivity {
  private   ArrayList<String> list = new ArrayList<>();
private ListView listView;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        String url="https://api.myjson.com/bins/1a1a1f";
         listView = (ListView) findViewById(R.id.list);
        RequestQueue requestQueue = Volley.newRequestQueue(getApplicationContext());
        JsonArrayRequest jsonArrayRequest = new JsonArrayRequest(Request.Method.GET, url, null, new Response.Listener<JSONArray>() {
            @Override
            public void onResponse(JSONArray response) {
for (int i=0;i<response.length();i++){

    try {
        JSONObject jsonObject = response.getJSONObject(i);
        list.add(jsonObject.getString("name"));

    } catch (JSONException e) {
        e.printStackTrace();
    }
}

                ArrayAdapter <String> adapter = new ArrayAdapter<String>(MainActivity.this,android.R.layout.simple_list_item_1,list);
listView.setAdapter(adapter);
            }





        }, new Response.ErrorListener() {
            @Override
            public void onErrorResponse(VolleyError error) {
            }
        });

        requestQueue.add(jsonArrayRequest);
    }
}

Json Tutorial

What is JSON

JSON stands for JavaScript Object Notation. It is data saved in the .json file and consists of a series of key/value pairs. JSON names require double quotes . JSON is used to transfer the data between the server and the browser.

Sample Json File To Understand Json File Stracture.

Important Tips For Json Data Structure.

When Json Data In {}curley Bracket inside {}curley Bracket Data Is JSon Object
When Json Data In []3rd Bracket inside []3rd Bracket Data Is JSon Array

//Example 1: Json Object

{
    "fruit": "Apple",
    "size": "Large",
    "color": "Red"
}

//Array In Json Format
{
"name":"John",
"age":30,
"cars":[ "Ford", "BMW", "Fiat" ]
}

//Another Json array Example
[{
   "name" : "Steve",
   "age" :  "29",
   "gender" : "male"

},
{
   "name" : "Peter",
   "age" : "32",
   "gender" : "male"

},
{
   "name" : "Sophie",
   "age" : "27",
   "gender" : "female"
}];

Now Going To Json Opreation To Various Programing Language.

Php Array To Json Array

<?php

// app.php

$arr = array('a' => 1, 'b' => 2, 'c' => 3, 'd' => 4, 'e' => 5);
echo json_encode($arr);
?>

Convert PHP Object to JSON

<?php

// app.php

class App {
  
}
$app = new App();
$app->title = 'Harry Potter Game';
$app->price = 20;

$jsonData = json_encode($app);
echo $jsonData;

Convert PHP String to JSON

<?php
$str = "hello AppDividend";
echo json_encode($str);
?>

Convert Multidimensional PHP Array into JSON

<?php
/* 
    multidimensional array initialization
*/
$cars = array(
    array(
        "name"=>"Urus", 
        "type"=>"SUV", 
        "brand"=>"Lamborghini"
    ),
    array(
        "name"=>"Cayenne", 
        "type"=>"SUV", 
        "brand"=>"Porsche"
    ),
    array(
        "name"=>"Bentayga", 
        "type"=>"SUV", 
        "brand"=>"Bentley"
    ),
);

echo json_encode($cars);
?>

Android Gridview With Custom Arrayadapter Image And Text

File – res/layout/main.xml

<?xml version="1.0" encoding="utf-8"?>
<GridView xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/gridView1"
    android:numColumns="auto_fit"
    android:gravity="center"
    android:columnWidth="100dp"
    android:stretchMode="columnWidth"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent" >

</GridView>

2. File – res/layout/mobile.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:padding="5dp" >
 
    <ImageView
        android:id="@+id/grid_item_image"
        android:layout_width="50px"
        android:layout_height="50px"
        android:layout_marginRight="10px"
        android:src="@drawable/android_logo" >
    </ImageView>
 
    <TextView
        android:id="@+id/grid_item_label"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@+id/label"
        android:layout_marginTop="5px"
        android:textSize="15px" >
    </TextView>
 
</LinearLayout>

2.2 Custom Adapter

package com.mkyong.android.adapter;

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.mkyong.android.R;

public class ImageAdapter extends BaseAdapter {
	private Context context;
	private final String[] mobileValues;

	public ImageAdapter(Context context, String[] mobileValues) {
		this.context = context;
		this.mobileValues = mobileValues;
	}

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

		LayoutInflater inflater = (LayoutInflater) context
			.getSystemService(Context.LAYOUT_INFLATER_SERVICE);

		View gridView;

		if (convertView == null) {

			gridView = new View(context);

			// get layout from mobile.xml
			gridView = inflater.inflate(R.layout.mobile, null);

			// set value into textview
			TextView textView = (TextView) gridView
					.findViewById(R.id.grid_item_label);
			textView.setText(mobileValues[position]);

			// set image based on selected text
			ImageView imageView = (ImageView) gridView
					.findViewById(R.id.grid_item_image);

			String mobile = mobileValues[position];

			if (mobile.equals("Windows")) {
				imageView.setImageResource(R.drawable.windows_logo);
			} else if (mobile.equals("iOS")) {
				imageView.setImageResource(R.drawable.ios_logo);
			} else if (mobile.equals("Blackberry")) {
				imageView.setImageResource(R.drawable.blackberry_logo);
			} else {
				imageView.setImageResource(R.drawable.android_logo);
			}

		} else {
			gridView = (View) convertView;
		}

		return gridView;
	}

	@Override
	public int getCount() {
		return mobileValues.length;
	}

	@Override
	public Object getItem(int position) {
		return null;
	}

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

}

MainActivity.java

package com.mkyong.android;

import com.mkyong.android.adapter.ImageAdapter;
import android.app.Activity;
import android.os.Bundle;
import android.widget.AdapterView;
import android.widget.GridView;
import android.widget.TextView;
import android.widget.Toast;
import android.view.View;
import android.widget.AdapterView.OnItemClickListener;

public class GridViewActivity extends Activity {

	GridView gridView;

	static final String[] MOBILE_OS = new String[] { 
		"Android", "iOS","Windows", "Blackberry" };

	@Override
	public void onCreate(Bundle savedInstanceState) {

		super.onCreate(savedInstanceState);
		setContentView(R.layout.main);

		gridView = (GridView) findViewById(R.id.gridView1);

		gridView.setAdapter(new ImageAdapter(this, MOBILE_OS));

		gridView.setOnItemClickListener(new OnItemClickListener() {
			public void onItemClick(AdapterView<?> parent, View v,
					int position, long id) {
				Toast.makeText(
				   getApplicationContext(),
				   ((TextView) v.findViewById(R.id.grid_item_label))
				   .getText(), Toast.LENGTH_SHORT).show();

			}
		});

	}

}

Android Custom ListView (Adding Images, text)

1.mylist.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent"
    android:layout_height="match_parent">
<TextView
    android:id="@+id/text"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content" />

    <ImageView
        android:id="@+id/image"
        android:layout_width="100dp"
        android:layout_height="100dp" />
</LinearLayout>

2.mainactivity.java

package com.example.listviewcustom;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ListView;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity {
private ListView listView;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        listView = findViewById(R.id.list);
        final String [] hardware = new String[] {"keyboard","mouse","microphone","router"};
        int[] imagearray= new int[]{R.drawable.ic_keyboard_black_24dp,R.drawable.ic_mouse_black_24dp,R.drawable.ic_keyboard_voice_black_24dp,R.drawable.ic_router_black_24dp};
    CustomArrayAdapter customArrayAdapter = new CustomArrayAdapter(this,hardware,imagearray);
    listView.setAdapter(customArrayAdapter);
    listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
        @Override
        public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
            Toast.makeText(getApplicationContext(),hardware[position].toString(),Toast.LENGTH_SHORT).show();
        }
    });
    }
}

mainactivity.xml

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout 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">

<ListView
    android:id="@+id/list"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

</ListView>
</android.support.constraint.ConstraintLayout>

arrayadapter.java

package com.example.listviewcustom;

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;

public class CustomArrayAdapter extends BaseAdapter {

    Context context;
    String[] hardwarename;
    int[] image;

    public CustomArrayAdapter(Context context, String[] hardwarename, int[] image) {
        this.context = context;
        this.hardwarename = hardwarename;
        this.image = image;
    }

    @Override
    public int getCount() {
        return hardwarename.length;
    }

    @Override
    public Object getItem(int position) {
        return null;
    }

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

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        LayoutInflater layoutInflater = (LayoutInflater)context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        View view = layoutInflater.inflate(R.layout.mylist,null);
        TextView textView = view.findViewById(R.id.text);
        ImageView imageView = view.findViewById(R.id.image);
        textView.setText(hardwarename[position]);
        imageView.setImageResource(image[position]);
        return view;
    }
}

android gridiew example

1.1 Android Layout file – res/layout/main.xml

<?xml version="1.0" encoding="utf-8"?>
<GridView xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/gridView1"
    android:numColumns="auto_fit"
    android:gravity="center"
    android:columnWidth="50dp"
    android:stretchMode="columnWidth"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent" >

</GridView>

1.2 Activityjava

package com.mkyong.android;

import android.app.Activity;
import android.os.Bundle;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.GridView;
import android.widget.TextView;
import android.widget.Toast;
import android.view.View;
import android.widget.AdapterView.OnItemClickListener;

public class GridViewActivity extends Activity {

	GridView gridView;

	static final String[] numbers = new String[] { 
			"A", "B", "C", "D", "E",
			"F", "G", "H", "I", "J",
			"K", "L", "M", "N", "O",
			"P", "Q", "R", "S", "T",
			"U", "V", "W", "X", "Y", "Z"};

	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);

		setContentView(R.layout.main);

		gridView = (GridView) findViewById(R.id.gridView1);

		ArrayAdapter<String> adapter = new ArrayAdapter<String>(this,
				android.R.layout.simple_list_item_1, numbers);

		gridView.setAdapter(adapter);

		gridView.setOnItemClickListener(new OnItemClickListener() {
			public void onItemClick(AdapterView<?> parent, View v,
				int position, long id) {
			   Toast.makeText(getApplicationContext(),
				((TextView) v).getText(), Toast.LENGTH_SHORT).show();
			}
		});

	}

}

Android Floating Action Button

এন্ড্রোইড ফ্লোটিং অ্যাকশন বাটন হলো গোলাকার বাটন। এটা ইউজার ইন্টারফেসের উপরে অবস্থান করে এবং ক্লিক করলে কোন ইভেন্ট সংঘটিত করে। এন্ড্রোইড ফ্লোটিং অ্যাকশন বাটন 3টা সাইজ এ ডিফাইন করা যায় normal এবং mini এবং auto ।

Add Design Support Libray In app Level Gradle.build File . Then Go To Mainactivity.xml file

  <android.support.design.widget.FloatingActionButton
        android:id="@+id/fab"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="bottom|end"
        android:layout_margin="16dp"
        android:src="@android:drawable/ic_dialog_email"/>

Go To MainActivity.java And Add This Line

    FloatingActionButton fab = findViewById(R.id.fab);
        fab.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                // We are showing only toast message. However, you can do anything you need.
                Toast.makeText(getApplicationContext(), "You clicked Floating Action Button", Toast.LENGTH_SHORT).show();
            }
        });

Attributes of Android Floating Action Button Widget

Some of the popular attributes of android Floating Action Button widget are –

Sr.	XML Attributes	Description
1	app:fabCustomSize	Sets the size of the button in pixels. If set to NO_CUSTOM_SIZE, custom size will not be used and size will be calculated based on the fabSize attribute.
2	app:fabSize	Sets the size of the button. There are 3 options available – normal, mini and auto. normal is larger than mini. auto will choose size based on the screen size.
3	app:elevation	Sets elevation of the button.
4	app:rippleColor	Sets ripple colour for button
5	app:useCompatPadding	Sets inner padding of button on platform lollipop and after.

IMPORTANT WEBSITE FOR DESIGNER AND DEVELOPER AND PROGRAMMER

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http://geektyper.com/shield/

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What is JSON

Convert PHP Object to JSON

Convert PHP String to JSON

Convert Multidimensional PHP Array into JSON

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Attributes of Android Floating Action Button Widget

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