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Idioma: En

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)

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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());
  }

 }


}

Add network permission to AndroidManifest.xml 
       
          <uses-permission android:name="android.permission.INTERNET" />
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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;

 }


}


please update the corresponding  remote ip address
Add  below permissions to AndroidManifest.xml
    
    
    <uses-permission android:name="android.permission.INTERNET" >
    </uses-permission>

    <uses-permission android:name="android.permission.MODIFY_AUDIO_SETTINGS" >
    </uses-permission>

    <uses-permission android:name="android.permission.RECORD_AUDIO" >

    </uses-permission>

Run the above rtp sender application
Now start the vlc player and click Media-->Open Network Stream menu
Enter the following url  (please update with your machine ip) and click play button

         rtp://192.168.1.19:22222





Now you can hear the voice  and analysis the receiving data using following vlc options



     Open  Tools--->Codec Information
            


            
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Android Home And Lock Screen Widget - (Temperature Widget)

Create TemperatureWidget class and register with Temperature sensor intend
Download Source 
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);
 }
}

Create widget_layout.xml under res/layout folder 
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/layout"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:layout_margin="8dip"
    android:background="@drawable/myshape" >

    <TextView
        android:id="@+id/update"
        style="@android:style/TextAppearance.Medium"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_gravity="center"
        android:gravity="center_horizontal|center_vertical"
        android:layout_margin="4dip"
        android:text="Static Text" >
    </TextView>

</LinearLayout> 
Create myshape.xml under res/drawable folder
<?xml version="1.0" encoding="UTF-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
    android:shape="rectangle" >

    <stroke
        android:width="2dp"
        android:color="#FFFFFFFF" />

    <gradient
        android:angle="225"
        android:endColor="#DD2ECCFA"
        android:startColor="#DD000000" />

    <corners
        android:bottomLeftRadius="7dp"
        android:bottomRightRadius="7dp"
        android:topLeftRadius="7dp"
        android:topRightRadius="7dp" />

</shape>
Create widget_info.xml under res/xml folder ,We can create this xml file using " File-->New --> Android xml file " menu with resource type is AppWidget Provider option ,then set attributeandroid:widgetCategory="keyguard|home_screen" 
<?xml version="1.0" encoding="utf-8"?>
<appwidget-provider xmlns:android="http://schemas.android.com/apk/res/android"  
    android:initialLayout="@layout/widget_layout"
    android:minHeight="20dp"
    android:minWidth="20dp"
    android:updatePeriodMillis="30000" android:widgetCategory="keyguard|home_screen">  


</appwidget-provider>

Configure android manifest xml 
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.javaorigin.widget"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk
        android:minSdkVersion="8"
        android:targetSdkVersion="17" />

    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
           <receiver android:name="TemperatureWidget" >
            <intent-filter >
                <action 
                    android:name="android.appwidget.action.APPWIDGET_UPDATE" />
            </intent-filter>

            <meta-data
                android:name="android.appwidget.provider"
                android:resource="@xml/widget_info" />
        </receiver>
    </application>

</manifest>
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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
Download Source 
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);   
 }


}


Create Temperature Broadcast Receiver
package com.javaorigin.temperature;

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;

public class TemperatureReceiver extends BroadcastReceiver{
 TemperatureActivity activity=null;
 public TemperatureReceiver(TemperatureActivity mainActivity) {
  activity=mainActivity;
 }
 @Override
 public void onReceive(Context arg0, Intent arg1) {
  activity.tempDisplay.setText(arg1.getIntExtra("temperature", 0)/10.0D+"");
 }

}

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

Simple echo application for how to use android AudioTrack and AudioRecord classes
Download Source 
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");
  }
 }

}
Step 2
        Add Button for Play/Pause and Call mode/ Speaker mode
<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:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context=".MainActivity" >



    <Button
        android:id="@+id/modeBtn"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/textView1"
        android:layout_below="@+id/textView1"
        android:layout_marginTop="24dp"
        android:text="Call Mode" 
        android:onClick="modeChange"/>

    <Button
        android:id="@+id/playBtn"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignBaseline="@+id/modeBtn"
        android:layout_alignBottom="@+id/modeBtn"
        android:layout_marginLeft="30dp"
        android:layout_toRightOf="@+id/modeBtn"
        android:onClick="play"
        android:text="Pause" />

</RelativeLayout>

Step 3
    Add audio related permission to Android.xml 
    <uses-permission android:name="android.permission.MODIFY_AUDIO_SETTINGS"></uses-permission>
    <uses-permission android:name="android.permission.RECORD_AUDIO"></uses-permission>
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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();
  }

 }


}


Step 2:
Create IDL interface for getting core Telephony service
package name must be com.android.internal.telephony

FileName : ITelephony.aidl
  package com.android.internal.telephony;

  interface ITelephony {


    boolean endCall();


    void answerRingingCall();


    void silenceRinger();

  }


Step 3:
AndroidManifest.xml configuration
  <?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
      package="com.javaorigin.android.sample"
      android:versionCode="1"
      android:versionName="1.0">  
    <application android:icon="@drawable/icon" android:label="@string/app_name">

        <receiver  android:name=".PhoneCallReceiver">
            <intent-filter  android:priority="100" >
                <action android:name="android.intent.action.PHONE_STATE" />
            </intent-filter>
        </receiver>

    </application>
    <uses-sdk android:minSdkVersion="5" />
    <uses-permission android:name="android.permission.MODIFY_PHONE_STATE" />
    <uses-permission android:name="android.permission.CALL_PHONE" />
    <uses-permission android:name="android.permission.READ_PHONE_STATE" />

    <uses-sdk android:minSdkVersion="8" />

</manifest>

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Android Notification LED sample

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