GridView

MainActivity.java

package kanta.gridview_image;

import android.app.Activity;

import android.os.Bundle;
import android.widget.GridView;

public class MainActivity extends Activity
{
GridView gridView;
    @Override
    protected void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        gridView=(GridView)findViewById(R.id.gridView);

        ImageAdapter adapter=new ImageAdapter(this);
         gridView.setAdapter(adapter);
    }
}

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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:orientation="vertical"
    tools:context="kanta.gridview_image.MainActivity">


    <GridView
        android:id="@+id/gridView"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:columnWidth="90dp"
        android:gravity="center"
        android:horizontalSpacing="10dp"
        android:numColumns="auto_fit"
        android:stretchMode="columnWidth"


        android:verticalSpacing="10dp" />
</LinearLayout>

ImageAdapter.java

package kanta.gridview_image;

import android.content.Context;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.GridView;
import android.widget.ImageView;

/**
 * Created by kanta on 30-Apr-16.
 */
public class ImageAdapter extends BaseAdapter
{
    int[] mThumbIds =
            {
                    R.drawable.china,
                    R.drawable.india,
                    R.drawable.japan,
                    R.drawable.united_kingdom,
                    R.drawable.united_states,
                    R.drawable.china,
                    R.drawable.india,
                    R.drawable.japan,
                    R.drawable.united_kingdom,
                    R.drawable.united_states,
                    R.drawable.china,
                    R.drawable.india,
                    R.drawable.japan,
                    R.drawable.united_kingdom,
                    R.drawable.united_states

            };
    Context context;

    public ImageAdapter(MainActivity mainActivity)
    {
        this.context = mainActivity;
    }

    @Override
    public int getCount() {
        return mThumbIds.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)
    {
        ImageView imageView;
        if (convertView == null)
        {
            imageView = new ImageView(context);
            imageView.setLayoutParams(new GridView.LayoutParams(300, 300));
            imageView.setScaleType(ImageView.ScaleType.CENTER_CROP);
            imageView.setPadding(8, 8, 8, 8);

        }
        
        else
        {
            imageView = (ImageView) convertView;
        }
        imageView.setImageResource(mThumbIds[position]);
        return imageView;
    }
}

xxx

AndroidCheckBoxExample.zip - 21.3 MB

Android Fragment Example: Inter-Fragment Communication

MainActivity.java

package kanta.interfragmentsave; 
 
import android.app.Activity; 
import android.app.FragmentManager; 
import android.os.Bundle; 
 

public class Main extends Activity implements communicator 
{ 
    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
        super.onCreate(savedInstanceState); 
        setContentView(R.layout.main); 
    } 
 
 
    @Override 
    public void respond(int data) { 
        FragmentManager manager=getFragmentManager(); 
        FragB fragB= (FragB) manager.findFragmentById(R.id.fragment2); 
 
        fragB.changedata(""+data+""); 
    } 
} 

FragmentA.java

package kanta.interfragmentsave; 
 
import android.app.Fragment; 
import android.os.Bundle; 
import android.support.annotation.Nullable; 
import android.view.LayoutInflater; 
import android.view.View; 
import android.view.ViewGroup; 
import android.widget.Button; 
 

public class FragA extends Fragment 
{ 
    Button b; 
    communicator comm; 
    int count=0; 
 
    @Override 
    public void onCreate(Bundle savedInstanceState) { 
        super.onCreate(savedInstanceState); 
 
        if(savedInstanceState==null) 
        { 
             count=0; 
        } 
        else 
        { 
           count=savedInstanceState.getInt("count",0); 
        } 
    } 
 
    @Nullable 
    @Override 
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { 
        return inflater.inflate(R.layout.frag_a,container,false); 
    } 
 
    @Override 
    public void onSaveInstanceState(Bundle outState) { 
        super.onSaveInstanceState(outState); 
        outState.putInt("count",count); 
    } 
 
    @Override 
    public void onActivityCreated(Bundle savedInstanceState) { 
        super.onActivityCreated(savedInstanceState); 
        comm= (communicator) getActivity(); 
        b=(Button)getActivity().findViewById(R.id.button); 
        b.setOnClickListener(new View.OnClickListener() { 
            @Override 
            public void onClick(View v) 
            { 
                count++; 
                comm.respond(count); 
            } 
        }); 
    } 
} 

FragmentB.java

package kanta.interfragmentsave; 
 
import android.app.Fragment; 
import android.os.Bundle; 
import android.support.annotation.Nullable; 
import android.view.LayoutInflater; 
import android.view.View; 
import android.view.ViewGroup; 
import android.widget.TextView; 
 
/** 
 * Created by kanta on 25-Apr-16. 
 */ 
public class FragB extends Fragment 
{ 
    TextView textView; 
    String data; 
    @Nullable 
    @Override 
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { 
        return inflater.inflate(R.layout.frag_b,container,false); 
    } 
 
    @Override 
    public void onActivityCreated(Bundle savedInstanceState) { 
        super.onActivityCreated(savedInstanceState); 
        textView=(TextView)getActivity().findViewById(R.id.textView); 
 
    } 
 
 
 
    public void changedata(String data) 
    { 
        //this.data=data; 
        textView.setText(data); 
    } 
} 

communicator.java

package com.example.helloworld;

import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.view.MenuItem;
import android.support.v4.app.NavUtils;

public class MainActivity extends Activity {

   @Override
   public void onCreate(Bundle savedInstanceState) {
      super.onCreate(savedInstanceState);
      setContentView(R.layout.activity_main);
   }
   
   @Override
   public boolean onCreateOptionsMenu(Menu menu) {
      getMenuInflater().inflate(R.menu.activity_main, menu);
      return true;
   }
}

activity_main.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"
android:orientation="vertical">
<fragment
android:id="@+id/fragment"
android:name="kanta.interfragmentsave.FragA"
android:layout_width="match_parent"
android:layout_height="100dp" />
<fragment
android:id="@+id/fragment2"
android:name="kanta.interfragmentsave.FragB"
android:layout_width="match_parent"
android:layout_height="100dp"
android:layout_gravity="center_horizontal"
android:layout_marginTop="100dp" />
</LinearLayout>

fragment_a.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" android:background="@android:color/holo_orange_dark" android:gravity="center" android:orientation="vertical">
<Button android:id="@+id/button" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_gravity="center_horizontal" android:text="Change" /></LinearLayout>

fragment_b.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"
android:background="@android:color/holo_green_dark"
android:gravity="center"
android:orientation="vertical">
<TextView
android:id="@+id/textView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal"
android:text="Large Text"
android:textAppearance="?android:attr/textAppearanceLarge"
android:textColor="#ffffff" />
</LinearLayout>

AndroidManifest.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"
android:background="@android:color/holo_green_dark"
android:gravity="center"
android:orientation="vertical">
<TextView
android:id="@+id/textView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal"
android:text="Large Text"
android:textAppearance="?android:attr/textAppearanceLarge"
android:textColor="#ffffff" />
</LinearLayout>

Android Button Control

MainActivity.java

package com.example.saira_000.myapplication;

import android.content.Intent;
import android.net.Uri;
import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;

public class MainActivity extends ActionBarActivity {
   Button b1,b2,b3;
   
   @Override
   protected void onCreate(Bundle savedInstanceState) {
      super.onCreate(savedInstanceState);
      setContentView(R.layout.activity_main);
      
      b1=(Button)findViewById(R.id.button);
      b1.setOnClickListener(new View.OnClickListener() {
         @Override
         public void onClick(View v) {
            Toast.makeText(MainActivity.this,"YOUR MESSAGE",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.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);
   }
}

activity_main.xml

<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:paddingLeft="@dimen/activity_horizontal_margin"
   android:paddingRight="@dimen/activity_horizontal_margin"
   android:paddingTop="@dimen/activity_vertical_margin"
   android:paddingBottom="@dimen/activity_vertical_margin"
   tools:context=".MainActivity">
   
   <TextView
      android:id="@+id/textView1"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:text="Button Control"
      android:layout_alignParentTop="true"
      android:layout_centerHorizontal="true"
      android:textSize="30dp" />
      
   <TextView
      android:id="@+id/textView2"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:text="Tutorials point"
      android:textColor="#ff87ff09"
      android:textSize="30dp"
      android:layout_below="@+id/textView1"
      android:layout_centerHorizontal="true" />
      
   <ImageButton
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:id="@+id/imageButton"
      android:src="@drawable/abc"
      android:layout_below="@+id/textView2"
      android:layout_centerHorizontal="true" />
      
   <EditText
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:id="@+id/editText"
      android:layout_below="@+id/imageButton"
      android:layout_alignRight="@+id/imageButton"
      android:layout_alignEnd="@+id/imageButton" />
      
   <Button
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:text="Button"
      android:id="@+id/button"
      android:layout_alignTop="@+id/editText"
      android:layout_alignLeft="@+id/textView1"
      android:layout_alignStart="@+id/textView1"
      android:layout_alignRight="@+id/editText"
      android:layout_alignEnd="@+id/editText" />
      
</RelativeLayout>

String.xml

<?xml version="1.0" encoding="utf-8"?>
<resources>
   <string name="app_name">myapplication</string>
   <string name="action_settings">Settings</string>
</resources>

AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
   package="com.example.guidemo4"
   android:versionCode="1"
   android:versionName="1.0" >
   
   <uses-sdk
      android:minSdkVersion="8"
      android:targetSdkVersion="22" />
      
   <application
      android:allowBackup="true"
      android:icon="@drawable/ic_launcher"
      android:label="@string/app_name"
      android:theme="@style/AppTheme" >
      
      <activity
         android:name="com.example.guidemo4.MainActivity"
         android:label="@string/app_name" >
      
      <intent-filter>
         <action android:name="android.intent.action.MAIN" />
         <category android:name="android.intent.category.LAUNCHER" />
      </intent-filter>
      
      </activity>
      
   </application>
</manifest>

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