Android Technical Blogs: July 2016

Thursday, July 21, 2016

SMS READER IN ANDROID

SMS READER IN ANDROID:

Now a days many application providing functionality for SMS. In android programming we can implement this functionality with the below permission permissions

<uses-permission android:name="android.permission.WRITE_SMS" />
<uses-permission android:name="android.permission.READ_SMS" />
<uses-permission android:name="android.permission.RECEIVE_SMS"/>

Below example code can be copied from here in desired application and It can read all inbox as well as it updates SMS when new SMS comes on user device.

We can develop whole messaging apps if we want make that functionality to part of our application like few apps providing that functionality to make their apps as a default messenger app.

Here is SMS reader example

Android manifest permission:

<uses-permission android:name="android.permission.WRITE_SMS" />
<uses-permission android:name="android.permission.READ_SMS" />
<uses-permission android:name="android.permission.RECEIVE_SMS"/>

XML implementation (activity_sms.xml):

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical" android:layout_width="fill_parent"
    android:layout_height="fill_parent" android:id="@+id/MainLayout"
    android:weightSum="1"
    >

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textAppearance="?android:attr/textAppearanceMedium"
        android:text="SMS Inbox"
        android:id="@+id/textView"
        android:layout_gravity="center_horizontal"
       />

    <LinearLayout
        android:orientation="horizontal"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_weight=".15">

        <ListView android:id="@+id/SMSList"
            android:layout_height="wrap_content"
            android:layout_width="match_parent"
            android:layout_margin="5dp" />
    </LinearLayout>

    <LinearLayout
        android:orientation="horizontal"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_weight=".85"
        android:gravity="center_horizontal">

        <Button
            android:layout_width="match_parent"
            android:layout_height="match_parent"
          android:layout_marginLeft="20dp"
            android:layout_marginRight="20dp"
            android:text="Report"
            android:textColor="@color/white"
            android:background="@color/darkVoilet"
            android:id="@+id/btn_report"
            android:layout_gravity="center"/>
    </LinearLayout>

</LinearLayout>

values / Colors.xml :

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <color name="colorPrimary">#3F51B5</color>
    <color name="colorPrimaryDark">#303F9F</color>
    <color name="colorAccent">#FF4081</color>

        <color name="lightVoilet">#ccccff</color>
    <color name="darkVoilet">#944dff</color>
    <color name="white">#ffffff</color>
</resources>

Activity Class - SmsActivity.java :

package com.example.com.testapp;
import android.content.ContentResolver;
import android.content.Intent;
import android.database.Cursor;
import android.net.Uri;
import android.os.Bundle;
import android.os.Environment;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.ListView;
import android.widget.Toast;

import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;

public class SmsActivity extends AppCompatActivity implements OnItemClickListener,View.OnClickListener {

    private static SmsActivity inst;
    ArrayList<String> smsMessagesList = new ArrayList<String>();
    ListView smsListView;
    ArrayAdapter arrayAdapter;
    Button btn_report;

    public static SmsActivity instance() {
        return inst;
    }

    @Override
    public void onStart() {
        super.onStart();
        inst = this;
    }

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_sms);
        btn_report=(Button)findViewById(R.id.btn_report);
        btn_report.setOnClickListener(this);
        smsListView = (ListView) findViewById(R.id.SMSList);
        arrayAdapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, smsMessagesList);
        smsListView.setAdapter(arrayAdapter);
        smsListView.setOnItemClickListener(this);

        refreshSmsInbox();
  }

   /*
   Coloum details for SMS reader
    olumn ID    –   Column Name

    0                      :      _id
    1                      :     thread_id
    2                      :     address
    3                      :     person
    4                      :     date
    5                      :     protocol
    6                      :     read
    7                      :    status
    8                      :    type
    9                      :    reply_path_present
    10                   :   subject
    11                   :    body
    12                   :    service_center
    13                   :    locked*/

    public void refreshSmsInbox() {
        ContentResolver contentResolver = getContentResolver();
        Cursor smsInboxCursor = contentResolver.query(Uri.parse("content://sms/inbox"), null, null, null, null);
        int indexBody = smsInboxCursor.getColumnIndex("body");
        int indexAddress = smsInboxCursor.getColumnIndex("address");
        if (indexBody < 0 || !smsInboxCursor.moveToFirst()) return;
        arrayAdapter.clear();
        do {
            String str = "SMS From: " + smsInboxCursor.getString(indexAddress) +
                    "\n" + smsInboxCursor.getString(indexBody) + "\n";
            arrayAdapter.add(str);
        } while (smsInboxCursor.moveToNext());
    }

    public void updateList(final String smsMessage) {
        arrayAdapter.insert(smsMessage, 0);
        arrayAdapter.notifyDataSetChanged();
    }

    public void onItemClick(AdapterView<?> parent, View view, int pos, long id) {
        try {
            String[] smsMessages = smsMessagesList.get(pos).split("\n");
            String address = smsMessages[0];
            String smsMessage = "";
            for (int i = 1; i < smsMessages.length; ++i) {
                smsMessage += smsMessages[i];
            }

            String smsMessageStr = address + "\n";
            smsMessageStr += smsMessage;
            Toast.makeText(this, smsMessageStr, Toast.LENGTH_SHORT).show();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    @Override
    public void onClick(View v) {
        switch (v.getId())
        {
            case R.id.btn_report:

        }
    }

}

Broadcast receiver – SmsBroadcastReceiver :

package com.example.com.testapp;

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.telephony.SmsMessage;
import android.widget.Toast;

public class SmsBroadcastReceiver extends BroadcastReceiver {

    public static final String SMS_BUNDLE = "pdus";

    public void onReceive(Context context, Intent intent) {
        Bundle intentExtras = intent.getExtras();
        if (intentExtras != null) {
            Object[] sms = (Object[]) intentExtras.get(SMS_BUNDLE);
            String smsMessageStr = "";
            for (int i = 0; i < sms.length; ++i) {
                SmsMessage smsMessage = SmsMessage.createFromPdu((byte[]) sms[i]);

                String smsBody = smsMessage.getMessageBody().toString();
                String address = smsMessage.getOriginatingAddress();

                smsMessageStr += "SMS From: " + address + "\n";
                smsMessageStr += smsBody + "\n";
            }
            Toast.makeText(context, smsMessageStr, Toast.LENGTH_SHORT).show();

            //this will update the UI with message
            SmsActivity inst = SmsActivity.instance();
            inst.updateList(smsMessageStr);
        }
    }
}

I have write here only for reader code making few changes sms writing functionality can be implemented.

SMS READER IN ANDROID

SMS READER IN ANDROID:

Now a days many application providing functionality for SMS. In android programming we can implement this functionality with the below permission permissions

<uses-permission android:name="android.permission.WRITE_SMS" />
<uses-permission android:name="android.permission.READ_SMS" />
<uses-permission android:name="android.permission.RECEIVE_SMS"/>

Below example code can be copied from here in desired application and It can read all inbox as well as it updates SMS when new SMS comes on user device.

We can develop whole messaging apps if we want make that functionality to part of our application like few apps providing that functionality to make their apps as a default messenger app.

Here is SMS reader example

Android manifest permission:

<uses-permission android:name="android.permission.WRITE_SMS" />
<uses-permission android:name="android.permission.READ_SMS" />
<uses-permission android:name="android.permission.RECEIVE_SMS"/>

XML implementation (activity_sms.xml):

values / Colors.xml :

Activity Class - SmsActivity.java :

Broadcast receiver – SmsBroadcastReceiver :

I have write here only for reader code making few changes sms writing functionality can be implemented.

Monday, July 4, 2016

CSV file read and write in android

CSV WRITE AND READ IN ANDROID

There are many time in android programmers needs to write CSV or export few reports, data in csv format. There are many open source third party libraries available to do this but for the same you can write code without using any third party library.

According to my observation it is better Idea to write own code instead of using third party library like Opencsv libs etc. Generally library is designed to perform multiple task and for the same lots of code used inside library and our requirement is only to read or write csv file then why should we increase our code size to using library.

There is a simple way to read and write CSV without any third party library:

1) Create a directory to write file

File folder = new File(Environment.getExternalStorageDirectory()
+ "/TestFolder");

boolean var = false;
if (!folder.exists())
var = folder.mkdir();

System.out.println("" + var);

String fileName = folder.toString() + "/" + "Test.csv";

2) Writing a CSV file

FileWriter writer = new FileWriter(fileName);

writer.append("DisplayName");
writer.append(',');
writer.append("Age");
writer.append('\n');

writer.append("RAM");
writer.append(',');
writer.append("21");
writer.append('\n');

writer.append("ROHAN");
writer.append(',');
writer.append("22");
writer.append('\n');

3) Read CSV file

String []data ;

   FileInputStream fis = new FileInputStream(file);

   BufferedReader r = new BufferedReader(new InputStreamReader(fis));

   while ((strLine = r.readLine()) != null) {

dataValue = line.split(",");

String first = dataValue[1];

     String second = dataValue[2];
        }
   r.close();

Using the above code snippet user can read and write csv files below is whole function for the same.

public void generateCsvFile()
{
    try
    {

        File folder = new File(Environment.getExternalStorageDirectory()
                + "/ TestFolder ");

        boolean var = false;
        if (!folder.exists())
            var = folder.mkdir();

        System.out.println("" + var);

        String fileName = folder.toString() + "/" + "Test.csv";

//Here logic can be write to arrange required format of data
        FileWriter writer = new FileWriter(fileName);

       writer.append("DisplayName");
        writer.append(',');
        writer.append("Age");
        writer.append('\n');

        writer.append("RAM");
        writer.append(',');
        writer.append("26");
        writer.append('\n');

        writer.append("ROHAN");
        writer.append(',');
        writer.append("29");
        writer.append('\n');

        writer.flush();
        writer.close();

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

Android Technical Blogs

Thursday, July 21, 2016

SMS READER IN ANDROID

SMS READER IN ANDROID

Monday, July 4, 2016

CSV file read and write in android

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