Example Code: December 2011

Wednesday 14 December 2011

Audio Recording part-2

EnvironmentRecorder.java

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;

import android.app.Activity;
import android.media.AudioFormat;
import android.media.AudioRecord;
import android.media.MediaRecorder;
import android.os.Bundle;
import android.os.Environment;
import android.view.View;
import android.widget.Button;

public class EnvironmentRecorder {
private static final int RECORDER_BPP = 16;
private static final String AUDIO_RECORDER_FILE_EXT_WAV = ".wav";
private static final String AUDIO_RECORDER_FOLDER = "AudioRecorder";
private static final String AUDIO_RECORDER_TEMP_FILE = "record_temp.raw";
private static final int RECORDER_SAMPLERATE = 44100;
private static final int RECORDER_CHANNELS = AudioFormat.CHANNEL_IN_STEREO;
private static final int RECORDER_AUDIO_ENCODING = AudioFormat.ENCODING_PCM_16BIT;

private AudioRecord recorder = null;
private int bufferSize = 0;
private Thread recordingThread = null;
private boolean isRecording = false;

public EnvironmentRecorder(){

try{
bufferSize = AudioRecord.getMinBufferSize(RECORDER_SAMPLERATE,RECORDER_CHANNELS,RECORDER_AUDIO_ENCODING);
}catch (Exception e) {
e.printStackTrace();
}

}

private String getFilename(){
String filepath = Environment.getExternalStorageDirectory().getPath();
File file = new File(filepath,AUDIO_RECORDER_FOLDER);

if(!file.exists()){
file.mkdirs();
}

return (file.getAbsolutePath() + "/" + System.currentTimeMillis() + AUDIO_RECORDER_FILE_EXT_WAV);
}

private String getTempFilename(){
String filepath = Environment.getExternalStorageDirectory().getPath();
File file = new File(filepath,AUDIO_RECORDER_FOLDER);

if(!file.exists()){
file.mkdirs();
}

File tempFile = new File(filepath,AUDIO_RECORDER_TEMP_FILE);

if(tempFile.exists())
tempFile.delete();

return (file.getAbsolutePath() + "/" + AUDIO_RECORDER_TEMP_FILE);
}

public void startRecording(){
recorder = new AudioRecord(MediaRecorder.AudioSource.MIC,
RECORDER_SAMPLERATE, RECORDER_CHANNELS,RECORDER_AUDIO_ENCODING, bufferSize);

recorder.startRecording();

isRecording = true;

recordingThread = new Thread(new Runnable() {

@Override
public void run() {
writeAudioDataToFile();
}
},"AudioRecorder Thread");

recordingThread.start();
}

private void writeAudioDataToFile(){
byte data[] = new byte[bufferSize];
String filename = getTempFilename();
FileOutputStream os = null;

try {
os = new FileOutputStream(filename);
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}

int read = 0;

if(null != os){
while(isRecording){
read = recorder.read(data, 0, bufferSize);

if(AudioRecord.ERROR_INVALID_OPERATION != read){
try {
os.write(data);
} catch (IOException e) {
e.printStackTrace();
}
}
}

try {
os.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}

public void stopRecording(){
if(null != recorder){
isRecording = false;

recorder.stop();
recorder.release();

recorder = null;
recordingThread = null;
copyWaveFile(getTempFilename(),getFilename());
deleteTempFile();
}

}

private void deleteTempFile() {
File file = new File(getTempFilename());

file.delete();
}

private void copyWaveFile(String inFilename,String outFilename){
FileInputStream in = null;
FileOutputStream out = null;
long totalAudioLen = 0;
long totalDataLen = totalAudioLen + 36;
long longSampleRate = RECORDER_SAMPLERATE;
int channels = 2;
long byteRate = RECORDER_BPP * RECORDER_SAMPLERATE * channels/8;

byte[] data = new byte[bufferSize];

try {
in = new FileInputStream(inFilename);
out = new FileOutputStream(outFilename);
totalAudioLen = in.getChannel().size();
totalDataLen = totalAudioLen + 36;

//AppLog.logString("File size: " + totalDataLen);

WriteWaveFileHeader(out, totalAudioLen, totalDataLen,
longSampleRate, channels, byteRate);

while(in.read(data) != -1){
out.write(data);
}

in.close();
out.close();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}

private void WriteWaveFileHeader(
FileOutputStream out, long totalAudioLen,
long totalDataLen, long longSampleRate, int channels,
long byteRate) throws IOException {

byte[] header = new byte[44];

header[0] = 'R'; // RIFF/WAVE header
header[1] = 'I';
header[2] = 'F';
header[3] = 'F';
header[4] = (byte) (totalDataLen & 0xff);
header[5] = (byte) ((totalDataLen >> 8) & 0xff);
header[6] = (byte) ((totalDataLen >> 16) & 0xff);
header[7] = (byte) ((totalDataLen >> 24) & 0xff);
header[8] = 'W';
header[9] = 'A';
header[10] = 'V';
header[11] = 'E';
header[12] = 'f'; // 'fmt ' chunk
header[13] = 'm';
header[14] = 't';
header[15] = ' ';
header[16] = 16; // 4 bytes: size of 'fmt ' chunk
header[17] = 0;
header[18] = 0;
header[19] = 0;
header[20] = 1; // format = 1
header[21] = 0;
header[22] = (byte) channels;
header[23] = 0;
header[24] = (byte) (longSampleRate & 0xff);
header[25] = (byte) ((longSampleRate >> 8) & 0xff);
header[26] = (byte) ((longSampleRate >> 16) & 0xff);
header[27] = (byte) ((longSampleRate >> 24) & 0xff);
header[28] = (byte) (byteRate & 0xff);
header[29] = (byte) ((byteRate >> 8) & 0xff);
header[30] = (byte) ((byteRate >> 16) & 0xff);
header[31] = (byte) ((byteRate >> 24) & 0xff);
header[32] = (byte) (2 * 16 / 8); // block align
header[33] = 0;
header[34] = RECORDER_BPP; // bits per sample
header[35] = 0;
header[36] = 'd';
header[37] = 'a';
header[38] = 't';
header[39] = 'a';
header[40] = (byte) (totalAudioLen & 0xff);
header[41] = (byte) ((totalAudioLen >> 8) & 0xff);
header[42] = (byte) ((totalAudioLen >> 16) & 0xff);
header[43] = (byte) ((totalAudioLen >> 24) & 0xff);

out.write(header, 0, 44);
}

}

Send Email Example

SendEmailAttachmentActivity.java

package com.android.sendemailatattachment;

import android.app.Activity;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;

public class SendEmailAttachmentActivity extends Activity {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);

Intent sendIntent = new Intent(Intent.ACTION_SEND);
sendIntent.setType("image/jpeg");
//sendIntent.setType("text/plain");
sendIntent.putExtra(Intent.EXTRA_SUBJECT, "Photo");
sendIntent.putExtra(Intent.EXTRA_STREAM, Uri.parse("file:///sdcard/shortcut.jpeg"));
sendIntent.putExtra(Intent.EXTRA_TEXT, "Enjoy the photo");
startActivity(Intent.createChooser(sendIntent, "Email:"));

}
}

Show Gps Data

ShowGpsDataActivity.java

package com.android.showgpsdata;

import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Calendar;

import android.app.Activity;
import android.content.Context;
import android.content.pm.ActivityInfo;
import android.graphics.Color;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.Bundle;
import android.text.Html;
import android.widget.TextView;

public class ShowGpsDataActivity extends Activity {
private TextView txtData;

public static double lat = 0.0, longi = 0.0, gps_lat = 0.0, gps_long = 0.0,
gps_alt = 0.0;
public static float gps_speed = 0.0f;
long gps_time = 0 ;

private LocationManager locationManager;
private LocationListener locationListener;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
txtData=(TextView)findViewById(R.id.txtData);

txtData.setTextSize(20);
txtData.setTextColor(Color.BLACK);
txtData.setBackgroundColor(Color.WHITE);
txtData.setText(Html.fromHtml("GPS_Time:- "+"\n"+getGpsTime(gps_time)+" GPS_Latitude:- "+gps_lat+" GPS_Longitude:- "+gps_long+" GPS_Altitude:- "+gps_alt+" GPS_Speed:- "+gps_speed+" Meter/Second"));
try {
// ---use the LocationManager class to obtain GPS locations---

locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);

locationListener = new MyLocationListener();

locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0,locationListener);

} catch (Exception e) {
String s = e.toString();
s = "";
}

}

private class MyLocationListener implements LocationListener {
@Override
public void onLocationChanged(Location loc) {
if (loc != null) {
gps_time = loc.getTime();
gps_lat = loc.getLatitude();
gps_long = loc.getLongitude();
gps_speed = loc.getSpeed();
gps_alt = loc.getAltitude();

txtData.setText(Html.fromHtml("GPS_Time:- "+"\n"+getGpsTime(gps_time)+" GPS_Latitude:- "+gps_lat+" GPS_Longitude:- "+gps_long+" GPS_Altitude:- "+gps_alt+" GPS_Speed:- "+gps_speed+" Meter/Second"));
} else {
gps_time = 0;
gps_lat = 0.0;
gps_long = 0.0;
gps_speed = 0.0f;
gps_alt = 0.0;
}
}

@Override
public void onProviderDisabled(String provider) {
gps_time = 0;
gps_lat = 0.0;
gps_long = 0.0;
gps_speed = 0.0f;
gps_alt = 0.0;
}

@Override
public void onProviderEnabled(String provider) {

}

@Override
public void onStatusChanged(String provider, int status, Bundle extras) {
gps_time = 0;
gps_lat = 0.0;
gps_long = 0.0;
gps_speed = 0.0f;
gps_alt = 0.0;
}
}

public String getGpsTime(long gps_time) {
if (gps_time != 0) {
// gps_time = Math.abs(gps_time - System.currentTimeMillis());

DateFormat formatter = new SimpleDateFormat("dd.MM.yyyy HH:mm:ss a");

Calendar calendar = Calendar.getInstance();
calendar.setTimeInMillis(gps_time);
return formatter.format(calendar.getTime());
} else
return String.valueOf(gps_time);
}

}

Internal Database Example

TestDemoActivity.java

package com.android.testdemo;

import android.app.Activity;
import android.app.ListActivity;
import android.database.Cursor;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemSelectedListener;
import android.widget.ListView;
import android.widget.SimpleCursorAdapter;
import android.widget.Spinner;
import android.widget.Toast;

public class TestDemoActivity extends Activity {
private Cursor mCountryCur;
CountryTable conTable;
private StateTable stateTable;
private Cursor mStateCur;
private CityTable cityTable;
private Cursor mCityCur;

private static final String STATE="STATE";
private static final String COUNTRY="COUNTRY";
private static final String CITY="CITY";

private static int backCount=0;

private static String Current=STATE;

private Spinner spnrCountry,spnrState;
private ListView lstCity;

/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
spnrCountry=(Spinner)findViewById(R.id.spnrCountry);
spnrState=(Spinner)findViewById(R.id.spnrState);
lstCity=(ListView)findViewById(R.id.lstCity);
fillCountryList();

spnrCountry.setOnItemSelectedListener(new OnItemSelectedListener() {

@Override
public void onItemSelected(AdapterView<?> arg0, View arg1,
int arg2, long arg3) {
Toast.makeText(TestDemoActivity.this,"List position: "+arg2,Toast.LENGTH_SHORT).show();
fillStateList(arg2+1);

if(lstCity.getChildCount()>1){
lstCity.removeAllViews();
}
}

@Override
public void onNothingSelected(AdapterView<?> arg0) {

}
});

spnrState.setOnItemSelectedListener(new OnItemSelectedListener() {

@Override
public void onItemSelected(AdapterView<?> arg0, View arg1,
int arg2, long arg3) {
fillCityList(arg2+1);

}

@Override
public void onNothingSelected(AdapterView<?> arg0) {
Toast.makeText(TestDemoActivity.this,"Nothing",Toast.LENGTH_SHORT).show();

}
});

}

private void fillCountryList() {
fetchCountryData();
String[] from = new String[] { CountryTable.COUNTRY_NAME };
int[] to = new int[] {android.R.id.text1};
SimpleCursorAdapter adapter = new SimpleCursorAdapter(this,
android.R.layout.simple_spinner_item, mCountryCur, from, to);
adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
spnrCountry.setAdapter(adapter);
Current=COUNTRY;
}

private void fillStateList(int pos) {
fetchStateData(pos);
String[] from = new String[] { StateTable.STATE_NAME,StateTable._ID };
int[] to = new int[] {android.R.id.text1,};
SimpleCursorAdapter adapter = new SimpleCursorAdapter(this,
android.R.layout.simple_spinner_item, mStateCur, from, to);

adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
spnrState.setAdapter(adapter);
Current=STATE;
backCount=0;
}

private void fillCityList(int pos) {
fetchCityData(pos);
String[] from = new String[] { CityTable.CITY_NAME };
int[] to = new int[] { android.R.id.text1 };
SimpleCursorAdapter adapter = new SimpleCursorAdapter(this,
android.R.layout.simple_list_item_1, mCityCur, from, to);
lstCity.setAdapter(adapter);
}

public void fetchCountryData() {
try {
conTable = new CountryTable(this);
/*conTable.DeleteAllData();
conTable.insert(1, "India");
conTable.insert(2, "U.S.A");
conTable.insert(3, "China");*/

mCountryCur = conTable.fetAllData();
for (int i = 0; i < mCountryCur.getCount(); i++) {
mCountryCur.moveToPosition(i);
Log.i("TEST",
"Country: "
+ mCountryCur.getString(mCountryCur
.getColumnIndex(CountryTable._ID))
+ " : "
+ mCountryCur.getString(mCountryCur
.getColumnIndex(CountryTable.COUNTRY_NAME)));
}
} catch (Exception e) {
e.printStackTrace();
}
}

public void fetchStateData(int pos) {
try {

stateTable = new StateTable(this);
stateTable.DeleteAllData();
stateTable.insert(1, "Gujarat", 1);
stateTable.insert(2, "Maharashtra", 1);
stateTable.insert(3, "Rajasthan", 1);

mStateCur = stateTable.fetchData(pos);
startManagingCursor(mStateCur);
for (int i = 0; i < mStateCur.getCount(); i++) {
mStateCur.moveToPosition(i);
Log.i("TEST",
"state: "
+ mStateCur.getString(mStateCur
.getColumnIndex(StateTable._ID))
+ " : "
+ mStateCur.getString(mStateCur
.getColumnIndex(StateTable.STATE_NAME)));
}
} catch (Exception e) {
e.printStackTrace();
}
}

public void fetchCityData(int pos) {
try {
cityTable = new CityTable(this);
//cityTable.DeleteAllData();
cityTable.insert(10, "Udaipur", 3);
cityTable.insert(11, "Jaipur", 3);
cityTable.insert(12, "Vilasa", 3);

mCityCur = cityTable.fetchData(pos);
startManagingCursor(mCityCur);
for (int i = 0; i < mCityCur.getCount(); i++) {
mCityCur.moveToPosition(i);
Log.i("TEST",
"City: "
+ mCityCur.getString(mCityCur
.getColumnIndex(CountryTable._ID))
+ " : "
+ mCityCur.getString(mCityCur
.getColumnIndex(CityTable.CITY_NAME)));
}
} catch (Exception e) {
e.printStackTrace();
}
}

/*@Override
protected void onListItemClick(ListView l, View v, int pos, long id) {
if(Current.equals(COUNTRY)){
fillStateList(pos+1);
}else if(Current.equals(STATE)){
fillCityList(pos+1);
}else if(Current.equals(CITY)){
//fillCityList();
}

Toast.makeText(this,"List position: "+pos,Toast.LENGTH_SHORT).show();
super.onListItemClick(l, v, pos, id);
}*/

@Override
public void onBackPressed(){
finish();

}
}

CountryTable.java

package com.android.testdemo;

import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteDatabase.CursorFactory;
import android.database.sqlite.SQLiteOpenHelper;

public class CountryTable extends SQLiteOpenHelper {
public static final String DATABASE_NAME="testdemo8";
public static final String TABLE_NAME="country3";

public static final String _ID="_id";
public static final String COUNTRY_NAME="Name";

private SQLiteDatabase mDb;

private static final String CREATE_TABLE="create table if not exists "+TABLE_NAME+" ("+_ID +" integer primary key,"+COUNTRY_NAME +" text)";

public CountryTable(Context context) {
super(context, DATABASE_NAME, null, 1);

}

@Override
public void onCreate(SQLiteDatabase db) {
try{
db.execSQL(CREATE_TABLE);
}catch (Exception e) {
e.printStackTrace();
}

}

@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
// TODO Auto-generated method stub

}

public void insert(int id,String name){
try{
mDb=getWritableDatabase();
ContentValues val= new ContentValues();
val.put(_ID, id);
val.put(COUNTRY_NAME, name);
mDb.insert(TABLE_NAME, null, val);
}catch (Exception e) {
e.printStackTrace();

// TODO: handle exception
}finally{
mDb.close();

}
}

public Cursor fetAllData(){
Cursor c=null;
try{
mDb=getReadableDatabase();
String query = "select * from "+ TABLE_NAME;
//c=mDb.query(TABLE_NAME, new String[]{_ID,COUNTRY_NAME},null, null,null,null,null);
c=mDb.rawQuery(query, null);

}catch (Exception e) {
e.printStackTrace();
}finally{
// mDb.close();
}
return c;
}

public void DeleteAllData(){

try{
mDb=getReadableDatabase();
String query = "delete from "+ TABLE_NAME;
mDb.execSQL(query);

}catch (Exception e) {
e.printStackTrace();
}finally{

}

}

}

StateTable.java

package com.android.testdemo;

import android.content.ContentValues;

import android.content.Context;

import android.database.Cursor;

import android.database.sqlite.SQLiteDatabase;

import android.database.sqlite.SQLiteOpenHelper;

public class StateTable extends SQLiteOpenHelper {

public static final String DATABASE_NAME = "testdemo10";

public static final String TABLE_NAME = "State2";

public static final String _ID = "_id";

public static final String STATE_NAME = "Name";

public static final String COUNTRY_ID = "CountryId";

private SQLiteDatabase mDb;

private static final String CREATE_TABLE = "create table if not exists "

+ TABLE_NAME + " (" + _ID + " integer primary key,"

+ STATE_NAME + " text," + COUNTRY_ID + " INTEGER)";

public StateTable(Context context) {

super(context, DATABASE_NAME, null, 1);

}

@Override

public void onCreate(SQLiteDatabase db) {

try {

db.execSQL(CREATE_TABLE);

} catch (Exception e) {

e.printStackTrace();

}

@Override

public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {

// TODO Auto-generated method stub

}

public void insert(int id,String name, int Con_id) {

try {

mDb = getWritableDatabase();

ContentValues val = new ContentValues();

val.put(_ID, id);

val.put(STATE_NAME, name);

val.put(COUNTRY_ID, Con_id);

long i=mDb.insert(TABLE_NAME, null, val);

} catch (Exception e) {

e.printStackTrace();

// TODO: handle exception

} finally {

mDb.close();

}

public Cursor fetchData(int conid) {

Cursor c = null;

try {

mDb = getReadableDatabase();

String query = "select * from " + TABLE_NAME + " where "

+ COUNTRY_ID + " = " + conid;

c = mDb.rawQuery(query, null);

c.moveToFirst();

} catch (Exception e) {

e.printStackTrace();

} finally {

mDb.close();

}

return c;

}

public void DeleteAllData() {

try {

mDb = getReadableDatabase();

String query = "delete from " + TABLE_NAME;

mDb.execSQL(query);

} catch (Exception e) {

e.printStackTrace();

} finally {

}

CityTable.java

package com.android.testdemo;

import android.content.ContentValues;

import android.content.Context;

import android.database.Cursor;

import android.database.sqlite.SQLiteDatabase;

import android.database.sqlite.SQLiteOpenHelper;

public class CityTable extends SQLiteOpenHelper {

public static final String DATABASE_NAME = "testdemo11";

public static final String TABLE_NAME = "City2";

public static final String _ID = "_id";

public static final String CITY_NAME = "Name";

public static final String STATE_ID = "StateId";

private SQLiteDatabase mDb;

private static final String CREATE_TABLE = "create table if not exists "

+ TABLE_NAME + " (" + _ID + " integer primary key,"

+ CITY_NAME + " text," + STATE_ID + " INTEGER)";

public CityTable(Context context) {

super(context, DATABASE_NAME, null, 1);

}

@Override

public void onCreate(SQLiteDatabase db) {

try {

db.execSQL(CREATE_TABLE);

} catch (Exception e) {

e.printStackTrace();

}

@Override

public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {

// TODO Auto-generated method stub

}

public void insert(int id,String name, int Con_id) {

try {

mDb = getWritableDatabase();

ContentValues val = new ContentValues();

val.put(_ID, id);

val.put(CITY_NAME, name);

val.put(STATE_ID, Con_id);

mDb.insert(TABLE_NAME, null, val);

} catch (Exception e) {

e.printStackTrace();

// TODO: handle exception

} finally {

mDb.close();

}

public Cursor fetchData(int conid) {

Cursor c = null;

try {

mDb = getReadableDatabase();

String query = "select * from " + TABLE_NAME + " where "

+ STATE_ID + " = " + conid;

c = mDb.rawQuery(query, null);

c.moveToFirst();

} catch (Exception e) {

e.printStackTrace();

} finally {

mDb.close();

}

return c;

}

public void DeleteAllData() {

try {

mDb = getReadableDatabase();

String query = "delete from " + TABLE_NAME;

mDb.execSQL(query);

} catch (Exception e) {

e.printStackTrace();

} finally {

}

main.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" >

<Spinner

android:id="@+id/spnrCountry"

android:layout_width="fill_parent"

android:layout_height="wrap_content" />

<Spinner

android:id="@+id/spnrState"

android:layout_width="fill_parent"

android:layout_height="wrap_content" />

<ListView

android:id="@+id/lstCity"

android:layout_width="fill_parent"

android:layout_height="wrap_content" />

</LinearLayout>