Transperency in android canvas

Paint Paint = new Paint();
    Paint.setColor(Color.argb(50, 128, 24, 24));
    Paint.setStyle(Style.FILL);   
    Paint.setAntiAlias(true);


50 is the alpha parameter based on which transperency parameter will vary

Complete excel to strings.xml and localised.txt is stored in google site(includes arrays also)

Java while running some external library file is missing

Do the following

Go to Project->Properties->Java Build Path than select Order and export tab. Set android-support-v4.jar library checked and up it into top of the list. And clean and rebuild..It works for most of the cases


External library is android-support-v4.jar in this case

Android header footer with scrollable listview

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

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

    android:layout_width="fill_parent"

    android:layout_height="fill_parent"

    android:background="@drawable/background_color" >

    <include

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:layout_alignParentLeft="true"

        android:layout_alignParentTop="true"

        android:layout_marginLeft="119dp"

        layout="@layout/header_text" />

    <include

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:layout_alignParentBottom="true"

        android:layout_alignParentLeft="true"

        layout="@layout/mnbuttons"

        android:id="@+id/footer"/>

    <ListView

        android:id="@id/android:list"

        android:layout_width="fill_parent"

        android:layout_height="fill_parent"

        android:layout_above="@+id/footer"

        android:layout_alignParentLeft="true"

        android:layout_alignParentTop="true"

        android:layout_marginTop="73dp" >

    </ListView>

</RelativeLayout>

Introducing hyperlink in alertdialogue box

package com.example.alertdialogue;

import android.app.Activity;
import android.app.AlertDialog;
import android.app.Dialog;
import android.content.DialogInterface;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.text.Html;
import android.text.method.LinkMovementMethod;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.View;

import android.widget.CheckBox;
import android.widget.TextView;

public class MainActivity extends Activity {
    public static final String PREFS_NAME = "MyPrefsFile1";
    public CheckBox dontShowAgain;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        AlertDialog.Builder adb = new AlertDialog.Builder(this);

        LayoutInflater adbInflater = LayoutInflater.from(this);
        View eulaLayout = adbInflater.inflate(R.layout.checkbox, null);
        dontShowAgain = (CheckBox) eulaLayout.findViewById(R.id.skip);
        adb.setView(eulaLayout);
        adb.setTitle("Attention");

        adb.setMessage(R.string.link_text_manual);
        adb.setPositiveButton("Ok", new DialogInterface.OnClickListener() {
            public void onClick(DialogInterface dialog, int which) {
                String checkBoxResult = "NOT checked";
                if (dontShowAgain.isChecked())
                    checkBoxResult = "checked";
                SharedPreferences settings = getSharedPreferences(PREFS_NAME, 0);
                SharedPreferences.Editor editor = settings.edit();
                editor.putString("skipMessage", checkBoxResult);
                // Commit the edits!
                editor.commit();
                return;
            }
        });

        SharedPreferences settings = getSharedPreferences(PREFS_NAME, 0);
        String skipMessage = settings.getString("skipMessage", "NOT checked");
        if (skipMessage != "checked") {

            AlertDialog welcomeAlert = adb.create();
            welcomeAlert.show();

            ((TextView) welcomeAlert.findViewById(android.R.id.message))
                    .setMovementMethod(LinkMovementMethod.getInstance());
        }
    }
}


activity_main
--------------------
<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" >

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerHorizontal="true"
        android:layout_centerVertical="true"
        android:text="@string/hello_world"
        tools:context=".MainActivity" />

</RelativeLayout>


checkbox
-------------------
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/layout_root"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="horizontal"
    android:padding="10dp" >

    <CheckBox
        xmlns:android="http://schemas.android.com/apk/res/android"
        android:id="@+id/skip"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Do not show again" >
    </CheckBox>

</LinearLayout>


strings.xml
---------------------------------
<resources>

    <string name="app_name">alertdialogue</string>
    <string name="hello_world">Hello world!</string>
    <string name="menu_settings">Settings</string>
    <string name="title_activity_main">MainActivity</string>
      <string name="ok">ok</string>
 <string name="link_text_manual">Terms &amp; Conditions <a href="http://www.google.com">link</a>

</string>

</resources>

Intoducing TextView in alertdialogue and Onclicklistener on that

import android.app.Activity;


import android.app.AlertDialog;
import android.content.DialogInterface;
import android.content.SharedPreferences;
import android.graphics.Color;
import android.os.Bundle;
import android.text.Html;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.CheckBox;
import android.widget.LinearLayout;
import android.widget.TextView;
import android.widget.Toast;

public class MainActivity extends Activity {
    public static final String PREFS_NAME = "MyPrefsFile1";
    public CheckBox dontShowAgain;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        final CheckBox dontShowAgain = new CheckBox(this);

        TextView textViewTerms = new TextView(this);

        textViewTerms.setText("Terms & Conditions   ");

        TextView textView = new TextView(this);

        textView.setText(Html.fromHtml("<u>Details</u>"));
        textView.setTextColor(Color.BLUE);
       
       
       
       
        textView.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {
                // TODO Auto-generated method stub
                Toast.makeText(getApplicationContext(), "clicked",
                        Toast.LENGTH_LONG).show();

            }
        });

        LinearLayout checkBoxLayout = new LinearLayout(this);
        checkBoxLayout.setLayoutParams(new LinearLayout.LayoutParams(
                LinearLayout.LayoutParams.MATCH_PARENT,
                LinearLayout.LayoutParams.MATCH_PARENT));

        checkBoxLayout.addView(dontShowAgain);
        checkBoxLayout.addView(textViewTerms);
        checkBoxLayout.addView(textView);

        AlertDialog.Builder altDialog = new AlertDialog.Builder(this);
        altDialog.setCancelable(false);
        altDialog.setView(checkBoxLayout);
        altDialog.setMessage("Do not Show Again");
        altDialog.setPositiveButton("OK",
                new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which) {
                        // TODO Auto-generated method stub
                   

                        String checkBoxResult = "NOT checked";
                        if (dontShowAgain.isChecked())
                            checkBoxResult = "checked";
                        SharedPreferences settings = getSharedPreferences(
                                PREFS_NAME, 0);
                        SharedPreferences.Editor editor = settings.edit();
                        editor.putString("skipMessage", checkBoxResult);
                        // Commit the edits!
                        editor.commit();
                        return;

                    }
                });

        SharedPreferences settings = getSharedPreferences(PREFS_NAME, 0);
        String skipMessage = settings.getString("skipMessage", "NOT checked");
        if (skipMessage != "checked") {

            altDialog.show();
           
        }

       
   
    }
   
   
   
}

Alert dialogue with checkbox should appear only when check box is unchecked

package com.example.callingintent;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;

public class MainActivity extends Activity {

    public String name;

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    protected static final int REQUEST_CODE = 0;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        EditText edt1 = (EditText) findViewById(R.id.editText1);
        Button button1 = (Button) findViewById(R.id.button1);
        EditText et1 = (EditText) findViewById(R.id.editText1);
        et1.setText(getName());
        button1.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View arg0) {
                // TODO Auto-generated method stub

                Intent myintent = new Intent(MainActivity.this,
                        secondActivity.class);
                myintent.putExtra("name", "namratha");
                myintent.putExtra("Id", 1);
                // startActivity(myintent);
                startActivityForResult(myintent, REQUEST_CODE);
            }
        });
    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        String returnString;
        if (resultCode == RESULT_OK && requestCode == REQUEST_CODE) {
            if (data.hasExtra("returnString1")) {
                returnString = data.getExtras().getString("returnString1");
                System.out.println("return string is   " + returnString);
                setName(returnString);

            }
        }

    }

}




package com.example.callingintent;

import android.app.Activity;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.text.Html;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.CheckBox;
import android.widget.EditText;

public class secondActivity extends Activity {
    public static final String PREFS_NAME = "MyPrefsFile1";
    public CheckBox dontShowAgain;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        // TODO Auto-generated method stub
        super.onCreate(savedInstanceState);
        setContentView(R.layout.second);
        EditText et1 = (EditText) findViewById(R.id.editText1);
        EditText et2 = (EditText) findViewById(R.id.editText2);
        Bundle mydata = getIntent().getExtras();
        if (mydata != null) {
            String name = mydata.getString("name");
            int id = mydata.getInt("Id");
            System.out.println("id is " + id);

            et1.setText(name);
            // et1.setText(id);

        }

        AlertDialog.Builder adb = new AlertDialog.Builder(this);
        LayoutInflater adbInflater = LayoutInflater.from(this);
        View eulaLayout = adbInflater.inflate(R.layout.checkbox, null);
        dontShowAgain = (CheckBox) eulaLayout.findViewById(R.id.skip);
        adb.setView(eulaLayout);
        adb.setTitle("Attention");
        adb.setMessage(Html.fromHtml("Message"));
        adb.setPositiveButton("Ok", new DialogInterface.OnClickListener() {
            public void onClick(DialogInterface dialog, int which) {
                String checkBoxResult = "NOT checked";
                if (dontShowAgain.isChecked())
                    checkBoxResult = "checked";
                SharedPreferences settings = getSharedPreferences(PREFS_NAME, 0);
                SharedPreferences.Editor editor = settings.edit();
                editor.putString("skipMessage", checkBoxResult);
                // Commit the edits!
                editor.commit();
                return;
            }
        });
        SharedPreferences settings = getSharedPreferences(PREFS_NAME, 0);
        String skipMessage = settings.getString("skipMessage", "NOT checked");
        if (skipMessage != "checked")
            adb.show();

    }

    public void finish() {
        Intent data = new Intent();

        data.putExtra("returnString1", "Message to parent activity");
        setResult(RESULT_OK, data);
        super.finish();

    }

}



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" >

    <TextView
        android:id="@+id/textView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerHorizontal="true"
        android:layout_centerVertical="true"
        android:text="@string/hello_world"
        tools:context=".MainActivity" />

    <Button
        android:id="@+id/button1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_alignParentTop="true"
        android:layout_marginTop="44dp"
        android:text="Button" />

    <EditText
        android:id="@+id/editText1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@+id/button1"
        android:layout_marginTop="33dp"
        android:layout_toLeftOf="@+id/textView1"
        android:ems="10" >

        <requestFocus />
    </EditText>

</RelativeLayout>


checkbox.xml
-------------------------------
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/layout_root"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="horizontal"
    android:padding="10dp" >

    <CheckBox
        xmlns:android="http://schemas.android.com/apk/res/android"
        android:id="@+id/skip"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Do not show again" >
    </CheckBox>

</LinearLayout>

second.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" >

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerHorizontal="true"
        android:layout_centerVertical="true"
        android:text="Hello Second Activity"
        tools:context=".MainActivity" />

    <EditText
        android:id="@+id/editText1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_alignParentTop="true"
        android:layout_marginLeft="36dp"
        android:layout_marginTop="36dp"
        android:ems="10" >

        <requestFocus />
    </EditText>

    <EditText
        android:id="@+id/editText2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/editText1"
        android:layout_below="@+id/editText1"
        android:layout_marginLeft="21dp"
        android:layout_marginTop="20dp"
        android:ems="10" />

</RelativeLayout>

Delete DataBase android sqllite

// TODO Auto-generated method stub
         public void deleteDatabase() {
             System.out.println("delete deleteDatabase calleds");
             mHelper = new MyDbHelper(context,
                      "dbname");
                 SQLiteDatabase db = mHelper.getWritableDatabase();
           
                 mHelper.close();
                 db.close();
              if (this.context().deleteDatabase("dbname") {
              System.out.println("db deleted");
              } else {
                System.out.println("not deleted");
              }
            }

InsertList RemoveList Easy Approach

import java.util.ArrayList;
import java.util.List;

public class ListCompApa {
    public static void main(String[] args) {
       
       
           

         final List<String> gatewaylist = new ArrayList<String>();
   
         gatewaylist.add("namea");
         gatewaylist.add("sam");
         final List<String> dblist = new ArrayList<String>();
         dblist.add("ddd");
         dblist.add("lll");
         dblist.add("namea");
       
         final List<String> insertList = new ArrayList<String>(gatewaylist);
         insertList.removeAll(dblist);
         final List<String> removeList = new ArrayList<String>(dblist);
         removeList.removeAll(gatewaylist);
         System.out.println("gatewaylist ins "+insertList);
         System.out.println("dblist rem "+removeList);
       
    }

}

list compare

import java.util.ArrayList;

public class SampleList {
    public static void main(String[] args) {
         ArrayList<String> arl=new ArrayList<String>();
       
       
         ArrayList<String> first=new ArrayList<String>();
         ArrayList<String> second=new ArrayList<String>();
       
         first.add("checkthis");
         first.add("cat");
         first.add("dog");
         first.add("mat");
         second.add("checkthis");
         second.add("hello");
         second.add("haio");
         second.add("nameghj");
       
       
       
         for (String a : first)
            {
                for (String b : second)
                {
                    if (a.equals(b))
                    {
                        System.out.println("Equals " + a);
                       
                    }
                }
            }
       
       
       
       
       
       
         if(second.contains("checkthis"))
             System.out.println("true");
         else
             System.out.println("false");
       
         ArrayList<String> dup=new ArrayList<String>();
         String name = "abcd";
         String test ;
       
         arl.add("namratha");
         arl.add("sonu");
       
         if(arl.contains("namratha"))
         {
             System.out.println("exe");
             arl.remove("namratha");
             arl.add("namratha");
         }
       
       
         for(String sample : arl)
         {
             System.out.println("list items are "+sample);
         }
       
         dup.addAll(arl);
         for(String dupsam : dup)
         {
             System.out.println("Dup list "+dupsam);
         }
       
         if(!(name.equals(null))){
             System.out.println("executed");
         }
//         try {
//            if(test.equals(null))
//             {
//                 System.out.println("test is null");
//               
//             }
//             else
//             {
//                 System.out.println("space is executed");
//             }
//        } catch (NullPointerException e) {
//            // TODO Auto-generated catch block
//            e.printStackTrace();
//        }
       
       
       
       
    }

}



example 2 :
package com.sam;

import java.util.Collection;
import java.util.ArrayList;
import java.util.Arrays;

public class listcompare {
    public static void main(String[] args) {
        Collection listOne = new ArrayList(Arrays.asList("milan", "dingo",
                "elpha", "hafil", "meat", "iga", "neeta.peeta"));
        Collection listTwo = new ArrayList(Arrays.asList("hafil", "iga",
                "binga", "mike", "dingo"));
        listOne.retainAll(listTwo);
        System.out.println("********************"+listOne);
       
       
        //my trial
       
       
        Collection first = new ArrayList<>();
        Collection second = new ArrayList<>();
        first.add("check");
        first.add("conn");
        first.add("dog");
       
        second.add("jkl");
        second.add("check");
        second.add("name");
       
        if(first.retainAll(second))
            System.out.println("first list "+first);
        System.out.println("second list "+second);
       
        System.out.println("first list after "+first);
       
       
    }
}



example 3
package com.sam;

import java.util.*;

public class compareobj {

    /**
     * @param args
     */
    public static void main(String[] args) {
        // TODO Auto-generated method stub
        List<String> al1 = new ArrayList();
        al1.add("a1");
        al1.add("a2");
        al1.add("a3");
        al1.add("a5");
        al1.add("a6");
        List<String> al2 = new ArrayList();
        al2.add("a1");
        al2.add("a2");
        al2.add("a3");
        al2.add("a4");
       
       

        for (Object objList : al1) {
            if (al2.contains(objList)) {
                System.out.println("print same "+al2.toString());
                al2.remove(objList);
            }
            else
            {
                System.out.println("diff are "+al2);
            }
        }
        System.out.println("length" + al2.size());
        System.out.println("Value in list" + al2);

    }

}