How to connecting to Google Drive from an Android App

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This sample demonstrates how to connect to an individual’s Google Drive* online storage service from an Android application. I’ll be describing the sections of code that are executed based on the usage flow of the app. This application is based on the Google Drive sample located here. Before you start building this sample, please follow the instructions in the previous link for registering your application with Google Cloud Console.

Like most Android applications, this one begins in the onCreate function of MainActivity. In this function, you can see the credentials for connecting to the Google Drive account are set up and an activity is started to prompt the user to select their Google account from the registered accounts on the device, or to enter a new one.

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mCredential = GoogleAccountCredential.usingOAuth2(this, Arrays.asList(DriveScopes.DRIVE));
        startActivityForResult(mCredential.newChooseAccountIntent(), REQUEST_ACCOUNT_PICKER);

Blocking Incoming call - Android

Step 1:

Create Broadcast receiver class for incoming call

package com.javaorigin.android.sample;

import java.lang.reflect.Method;

import com.android.internal.telephony.ITelephony;

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent
import android.telephony.TelephonyManager;
import android.util.Log;

public class PhoneCallReceiver extends BroadcastReceiver {
 Context context = null;
 private static final String TAG = "Phone call";
 private ITelephony telephonyService;

 @Override
 public void onReceive(Context context, Intent intent) {
  Log.v(TAG, "Receving....");
  TelephonyManager telephony = (TelephonyManager) 
  context.getSystemService(Context.TELEPHONY_SERVICE);  
  try {
   Class c = Class.forName(telephony.getClass().getName());
   Method m = c.getDeclaredMethod("getITelephony");
   m.setAccessible(true);
   telephonyService = (ITelephony) m.invoke(telephony);
   //telephonyService.silenceRinger();
   telephonyService.endCall();
  } catch (Exception e) {
   e.printStackTrace();
  }
  
 }

 
}

Android Audio Demo - AudioTrack , AudioRecord - (Echo Sample)

Simple echo application for how to use android AudioTrack and AudioRecord classes 

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Step 1
    Create MainActivity class for audio record and play

package com.javaorigin.audio;

import android.media.AudioFormat;
import android.media.AudioManager;
import android.media.AudioRecord;
import android.media.AudioTrack;
import android.media.MediaRecorder;
import android.os.Bundle;
import android.app.Activity;
import android.content.Context;
import android.view.Menu;
import android.view.View;
import android.widget.Button;

public class MainActivity extends Activity {
 AudioManager am = null;
 AudioRecord record =null;
 AudioTrack track =null;
 
 @Override
 protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.activity_main);
  setVolumeControlStream(AudioManager.MODE_IN_COMMUNICATION);
  init();
  (new Thread() {
   @Override
   public void run() {
    recordAndPlay();
   }
  }).start();
 }

 @Override
 public boolean onCreateOptionsMenu(Menu menu) {
  getMenuInflater().inflate(R.menu.main, menu);
  return true;
 }

 private void init() {
  int min = AudioRecord.getMinBufferSize(8000, AudioFormat.CHANNEL_IN_MONO, AudioFormat.ENCODING_PCM_16BIT);
  record = new AudioRecord(MediaRecorder.AudioSource.VOICE_COMMUNICATION, 8000, AudioFormat.CHANNEL_IN_MONO,
    AudioFormat.ENCODING_PCM_16BIT, min);

  int maxJitter = AudioTrack.getMinBufferSize(8000, AudioFormat.CHANNEL_OUT_MONO, AudioFormat.ENCODING_PCM_16BIT);
  track = new AudioTrack(AudioManager.MODE_IN_COMMUNICATION, 8000, AudioFormat.CHANNEL_OUT_MONO,
    AudioFormat.ENCODING_PCM_16BIT, maxJitter, AudioTrack.MODE_STREAM);
 }

 private void recordAndPlay() {
  short[] lin = new short[1024];
  int num = 0;
  am = (AudioManager) this.getSystemService(Context.AUDIO_SERVICE);
  am.setMode(AudioManager.MODE_IN_COMMUNICATION);
  record.startRecording();
  track.play();
  while (true) {
   num = record.read(lin, 0, 1024);
   track.write(lin, 0, num);
  }
 }
 
 boolean isSpeaker = false;

 public void modeChange(View view) {
  Button modeBtn=(Button) findViewById(R.id.modeBtn);
  if (isSpeaker == true) {   
   am.setSpeakerphoneOn(false);
   isSpeaker = false;
   modeBtn.setText("Call Mode");
  } else {   
   am.setSpeakerphoneOn(true);
   isSpeaker = true;
   modeBtn.setText("Speaker Mode");
  }
 }
    
 boolean isPlaying=true;
 public void play(View view){
  Button playBtn=(Button) findViewById(R.id.playBtn);
  if(isPlaying){
   record.stop();
   track.pause();
   isPlaying=false;
   playBtn.setText("Play");
  }else{
   record.startRecording();
   track.play();
   isPlaying=true;
   playBtn.setText("Pause");
  }
 }
 
}

Android Device/Battery Temperature Sensor Sample

Create Temperature activity and create instance for android.intent.action.BATTERY_CHANGED intend  and register with Temperature Broadcast Receiver

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package com.javaorigin.temperature;

import android.app.Activity;
import android.content.IntentFilter;
import android.os.Bundle;
import android.widget.TextView;

public class TemperatureActivity extends Activity   {
 TemperatureReceiver receiver=new TemperatureReceiver(this);
 TextView tempDisplay=null;
 @Override
 protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.activity_main);
   tempDisplay=(TextView) findViewById(R.id.tempDisplay);

   IntentFilter localIntentFilter = new IntentFilter();
   localIntentFilter.addAction("android.intent.action.BATTERY_CHANGED");
   registerReceiver(receiver, localIntentFilter);   
 }


}

Android Home And Lock Screen Widget - (Temperature Widget)

Create TemperatureWidget class and register with Temperature sensor intend

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package com.javaorigin.widget;

import android.appwidget.AppWidgetManager;
import android.appwidget.AppWidgetProvider;
import android.content.ComponentName;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.widget.RemoteViews;

package com.javaorigin.widget;

import android.appwidget.AppWidgetManager;
import android.appwidget.AppWidgetProvider;
import android.content.ComponentName;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.widget.RemoteViews;

public class TemperatureWidget extends AppWidgetProvider {
 double temp=0;
 @Override
 
 public void onUpdate(Context context, AppWidgetManager appWidgetManager,
   int[] appWidgetIds) {
  context.getApplicationContext().registerReceiver(this,new IntentFilter(Intent.ACTION_BATTERY_CHANGED));
  updateUI(context) ;
 }

 @Override
 public void onReceive(Context context, Intent intent) {  
  temp=intent.getIntExtra("temperature", 0)/10.0D;
  updateUI(context) ;
  super.onReceive(context, intent);
 }

 private void updateUI(Context context) {
  RemoteViews thisViews = new RemoteViews(context.getApplicationContext() .getPackageName(), R.layout.widget_layout);
  thisViews.setTextViewText(R.id.update, temp + "");

  ComponentName thisWidget = new ComponentName(context,TemperatureWidget.class);
  AppWidgetManager.getInstance(context).updateAppWidget(thisWidget,thisViews);
 }
}

Android RTP Sample (Receiving via VLC player)

Simple demonstrate application for creating rtp audio stream using android.net.rtp package

   RTP Sender    : Android Application
   RTP Receiver : VLC Player

 Source :RtpSender (SVN)
 Zipped Source : RTPSender.zip

 Steps :
       Create new android project with minimum sdk vesrion 12
       Open the MainActivity.java and make below code changes

package com.javaorigin.rtpsender;

import java.net.InetAddress;
import java.net.NetworkInterface;
import java.net.SocketException;
import java.util.Enumeration;

import android.app.Activity;
import android.content.Context;
import android.media.AudioManager;
import android.net.rtp.AudioCodec;
import android.net.rtp.AudioGroup;
import android.net.rtp.AudioStream;
import android.net.rtp.RtpStream;
import android.os.Bundle;
import android.os.StrictMode;
import android.util.Log;

public class MainActivity extends Activity {

 @Override
 protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.activity_main);
  StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();
  StrictMode.setThreadPolicy(policy);
  try {   
      AudioManager audio =  (AudioManager) getSystemService(Context.AUDIO_SERVICE); 
      audio.setMode(AudioManager.MODE_IN_COMMUNICATION);
      AudioGroup audioGroup = new AudioGroup();
      audioGroup.setMode(AudioGroup.MODE_NORMAL);        
      AudioStream audioStream = new AudioStream(InetAddress.getByAddress(getLocalIPAddress ()));
      audioStream.setCodec(AudioCodec.PCMU);
      audioStream.setMode(RtpStream.MODE_NORMAL);
                           //set receiver(vlc player) machine ip address(please update with your machine ip)
      audioStream.associate(InetAddress.getByAddress(new byte[] {(byte)192, (byte)168, (byte)1, (byte)19 }), 22222);
      audioStream.join(audioGroup);
     
   
  } catch (Exception e) {
   Log.e("----------------------", e.toString());
   e.printStackTrace();
  }
 }
public static byte[] getLocalIPAddress () {
    byte ip[]=null;
       try {
           for (Enumeration en = NetworkInterface.getNetworkInterfaces(); en.hasMoreElements();) {
               NetworkInterface intf = en.nextElement();
               for (Enumeration enumIpAddr = intf.getInetAddresses(); enumIpAddr.hasMoreElements();) {
                   InetAddress inetAddress = enumIpAddr.nextElement();
                   if (!inetAddress.isLoopbackAddress()) {
                    ip= inetAddress.getAddress();
                   }
               }
           }
       } catch (SocketException ex) {
           Log.i("SocketException ", ex.toString());
       }
       return ip;
       
 }
 

}

Android Get IP Address

Android application for fetching network IP address of the android device

Create new android project and add below code changes on MainActivity.java

Source SVN:Android IP Address Zipped Source :IPAddressDisplay.zip

package com.javaorigin.ipdisplay;

import java.net.InetAddress;
import java.net.NetworkInterface;
import java.util.Enumeration;

import android.app.Activity;
import android.os.Bundle;
import android.util.Log;
import android.widget.TextView;

public class MainActivity extends Activity {

 @Override
 protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.activity_main);
  try {
   for (Enumeration en = NetworkInterface.getNetworkInterfaces(); en.hasMoreElements();) {
              NetworkInterface intf = en.nextElement();
              for (Enumeration enumIpAddr = intf.getInetAddresses(); enumIpAddr.hasMoreElements();) {
                  InetAddress inetAddress = enumIpAddr.nextElement();
                  if (!inetAddress.isLoopbackAddress()) {
                  TextView ipView= (TextView) findViewById(R.string.ip);
                  ipView.setText(inetAddress.getHostAddress());
                  }
              }
          }
  } catch (Exception e) {
   Log.e("------------", e.toString());
  }
   
 }


}

Android Notification LED sample

Note : You should lock(screen) the phone before run this project(via android IDE) , because notification LED will be highlighted only when screen is off

Source SVN:LEDNotification
Zipped Source:LEDNotification

 
  public class LEDNotification extends Activity {
 @Override
 protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);

  setContentView(R.layout.activity_main);

  NotificationManager notif = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);

  for (int i = 0; i < 8; i++) {
   notif.cancel(1); // clear previous notification 
   final Notification notification = new Notification();
   if (i == 0){
    notification.ledARGB = Color.MAGENTA;
   }else if (i == 1){
    notification.ledARGB = Color.BLUE;
   }else if (i == 2){
    notification.ledARGB = Color.CYAN;
   }else if (i == 3){
    notification.ledARGB = Color.GRAY;
   }else if (i == 4){
    notification.ledARGB = Color.GREEN;
   }else if (i == 5){
    notification.ledARGB = Color.RED;
   }else if (i == 6){
    notification.ledARGB = Color.WHITE;
   }else if (i == 7){
    notification.ledARGB = Color.YELLOW;
   }
   notification.ledOnMS = 1000;
   notification.flags |= Notification.FLAG_SHOW_LIGHTS;
   notif.notify(1, notification);
   try {
    Thread.sleep(1000);
   } catch (InterruptedException e) {    
    e.printStackTrace();
   }
  }

 }

 

} 

No Special permission required for this project (LED Notification)