Simple Gridview Tutorial Android Studio

If you are interested to create an application to download wallpaper or create your own gallery application you can use this tutorial as a base, maybe a lot of tutorials that you can get but this time I am trying to share some information about making custom adapter for Gridview and send data int from activity to other activity then make the image feel full with CenterCrop ImageView.

Screenshot

Source Code

Videos

Sample Code

• MainActivity.java

package ha.captaincode;

import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.GridView;
import android.widget.ImageView;
import android.widget.TextView;

public class MainActivity extends AppCompatActivity {


    GridView Grid;
    GRIDAdapter adapter;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
        setSupportActionBar(toolbar);

        final Integer[] image = new Integer[]{R.drawable.image1, R.drawable.image2, R.drawable.image3,
                                        R.drawable.image4, R.drawable.image5, R.drawable.image6,
                                        R.drawable.image7, R.drawable.image8};

        Grid = (GridView)findViewById(R.id.MyGrid);
        adapter = new GRIDAdapter(getApplicationContext(), R.layout.grid_item, image);

        Grid.setAdapter(adapter);
        Grid.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView parent, View v, int position, long id) {
                Intent go = new Intent(getApplicationContext(), Details.class);
                go.putExtra("image", image[position]);
                //By position Clicked
                startActivity(go);
            }
        });

    }


    public class GRIDAdapter extends ArrayAdapter {
        private Integer[] Image;
        private int resource;
        private LayoutInflater inflater;

        public GRIDAdapter(Context context, int resource, Integer[] image) {
            super(context, resource, image);
            Image = image;
            this.resource = resource;
            inflater = (LayoutInflater)MainActivity.this.getSystemService(LAYOUT_INFLATER_SERVICE);
        }

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

            ViewHolder Holder = null;

            if (convertView == null) {
                Holder = new ViewHolder();
                convertView = inflater.inflate(resource, null);
                Holder.IMAGE = (ImageView) convertView.findViewById(R.id.imageID);
                convertView.setTag(Holder);
            } else {
                Holder = (ViewHolder)convertView.getTag();
            }
            Holder.IMAGE.setImageResource(Image[position]);
            Holder.IMAGE.setScaleType(ImageView.ScaleType.CENTER_CROP);

            return convertView;
        }

        class ViewHolder {
            private ImageView IMAGE;
        }
    }

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

        //noinspection SimplifiableIfStatement
        if (id == R.id.action_settings) {
            return true;
        }

        return super.onOptionsItemSelected(item);
    }
}

• Details.java

package ha.captaincode;

import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.widget.ImageView;

/**
 * Created by Captain Code on 07/10/2017.
 */

public class Details extends AppCompatActivity {

    @Override
    public void onCreate(Bundle s){
        super.onCreate(s);
        setContentView(R.layout.imagedetail);

        Integer IMAGE = getIntent().getIntExtra("image", 1/*Default Value of Int*/);

        ImageView img = (ImageView)findViewById(R.id.images);
        img.setScaleType(ImageView.ScaleType.CENTER_CROP);
        img.setImageResource(IMAGE);
    }
}

Create Background Animation Like Instagram Login Android Tutorials

We are often logged in some android apps, as an android developer we must be curious with the interface of the instagram application where the background can change its color with a very good time, therefore "Captain Code" provides a solution for you who want to know how to make a background like login on instagram that change its color automatically and periodically.

Screenshot

Source Code 

Videos

Create Background Animation Like Instagram Login Android Tutorials

Code Sample

• MainActivity.xml

package captain.code;

import android.graphics.drawable.AnimationDrawable;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.FrameLayout;

public class MainActivity extends AppCompatActivity {

    AnimationDrawable animationDrawable;
    FrameLayout frameLayout;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
        setSupportActionBar(toolbar);

        //Declare Animation and FrameLayout
        frameLayout = (FrameLayout)findViewById(R.id.myFrameLay);
        animationDrawable =(AnimationDrawable)frameLayout.getBackground();

        //Add time changes
        animationDrawable.setEnterFadeDuration(5000);
        animationDrawable.setExitFadeDuration(2000);

        //And start the animation Now
        animationDrawable.start();

        //Thanks For Watching dont forget for Subscribe

    }

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

        //noinspection SimplifiableIfStatement
        if (id == R.id.action_settings) {
            return true;
        }

        return super.onOptionsItemSelected(item);
    }
}

Welcome Developers.

Skip Activity Login Logout Using SharedPreferences Android

If you want to make android application with login and logout, you must watch this videos and download files needed below. In files i give you some code SharedPreferences Session For Android.

Screenshot

Source Code 

Video :

Skip Activity Login Logout Using SharedPreferences Android

Sample Code Java:

• MainActivity.java

package ha.captaincode;

import android.content.Intent;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.Button;

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
        setSupportActionBar(toolbar);

        Button LogOut = (Button)findViewById(R.id.logout) ;
        LogOut.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                SharedPrefs.saveSharedSetting(MainActivity.this, "CaptainCode", "true");
                //And when you click on Logout button, You will set the value to True AGAIN
                Intent LogOut = new Intent(getApplicationContext(), LoginActivity.class);
                startActivity(LogOut);
                finish();
            }
        });

        CekSession();
    }

    public void CekSession(){

        Boolean Check = Boolean.valueOf(SharedPrefs.readSharedSetting(MainActivity.this, "CaptainCode", "true"));

        Intent introIntent = new Intent(MainActivity.this, LoginActivity.class);
        introIntent.putExtra("CaptainCode", Check);

        //The Value if you click on Login Activity and Set the value is FALSE and whe false the activity will be visible
        if (Check) {
            startActivity(introIntent);
            finish();
        } //If no the Main Activity not Do Anything
    }

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

        //noinspection SimplifiableIfStatement
        if (id == R.id.action_settings) {
            return true;
        }

        return super.onOptionsItemSelected(item);
    }
}

• LoginActivity.java

package ha.captaincode;

import android.content.Intent;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.Button;

/**
 * Created by Captain Code on 04/10/2017.
 */

public class LoginActivity extends AppCompatActivity {

    @Override
    public void onCreate(Bundle a){
        super.onCreate(a);
        setContentView(R.layout.login);

        Button Login = (Button)findViewById(R.id.login);
        Login.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                SharedPrefs.saveSharedSetting(LoginActivity.this, "CaptainCode", "false");
                Intent ImLoggedIn = new Intent(getApplicationContext(), MainActivity.class);
                startActivity(ImLoggedIn);
                finish();
            }
        });
    }
}

• SharedPrefs.java

package ha.captaincode;

import android.content.Context;
import android.content.SharedPreferences;

/**
 * Created by Captain Code on 04/10/2017.
 */

public class SharedPrefs {

    final static String FileName = "CaptainCode";

    public static String readSharedSetting(Context ctx, String settingName, String defaultValue) {
        SharedPreferences sharedPref = ctx.getSharedPreferences(FileName, Context.MODE_PRIVATE);
        return sharedPref.getString(settingName, defaultValue);
    }

    public static void saveSharedSetting(Context ctx, String settingName, String settingValue) {
        SharedPreferences sharedPref = ctx.getSharedPreferences(FileName, Context.MODE_PRIVATE);
        SharedPreferences.Editor editor = sharedPref.edit();
        editor.putString(settingName, settingValue);
        editor.apply();
    }

}

I Hope This Tutorials Can Help You. :D