Detect "natural" orientation of screen, using Display.getRotation()

package com.AndroidOrientation;

import android.app.Activity;
import android.content.Context;
import android.hardware.SensorManager;
import android.os.Bundle;
import android.view.Display;
import android.view.OrientationEventListener;
import android.view.Surface;
import android.view.WindowManager;
import android.widget.TextView;
import android.widget.Toast;

public class AndroidOrientation extends Activity{
 
 TextView textOrientation;
 MyOrientationEventListener myOrientationEventListener;
 
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        textOrientation = (TextView)findViewById(R.id.textorientation);
        
        myOrientationEventListener = 
         new MyOrientationEventListener(this, SensorManager.SENSOR_DELAY_NORMAL);
        
        if (myOrientationEventListener.canDetectOrientation()){
         myOrientationEventListener.enable();
        }else{
         Toast.makeText(AndroidOrientation.this, 
           "Can't Detect Orientation!", 
           Toast.LENGTH_LONG).show();
        }
    }
    
    @Override
 protected void onDestroy() {
  // TODO Auto-generated method stub
  super.onDestroy();
  myOrientationEventListener.disable();
 }

 class MyOrientationEventListener extends OrientationEventListener{
  
  String prevOrientation = "";
  String curOrientation = "";

  public MyOrientationEventListener(Context context, int rate) {
   super(context, rate);
   // TODO Auto-generated constructor stub
  }

  @Override
  public void onOrientationChanged(int arg0) {
   // TODO Auto-generated method stub
   
   Display display = ((WindowManager)getSystemService(Context.WINDOW_SERVICE))
        .getDefaultDisplay();
   switch(display.getRotation()){
   case(Surface.ROTATION_0): 
    curOrientation = "ROTATION_0";
    break;
   case(Surface.ROTATION_90): 
    curOrientation = "ROTATION_90";
    break;
   case(Surface.ROTATION_180): 
    curOrientation = "ROTATION_180";
    break;
   case(Surface.ROTATION_270): 
    curOrientation = "ROTATION_270";
    break;
   }
   
   textOrientation.setText(curOrientation);
   
   if (!curOrientation.equals(prevOrientation)){
    Toast.makeText(AndroidOrientation.this, curOrientation, Toast.LENGTH_LONG).show();
    prevOrientation = curOrientation;
   }
  }
    }
}

Voice recognizer + Text to speech

Merge last two post; Start Android system's voice recognizer using Intent & Implement Android's Text to speech function.



Onec the recognized result selected, it will be speeched using TTS.

package com.AndroidRecognizer;

import java.util.ArrayList;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.speech.RecognizerIntent;
import android.speech.tts.TextToSpeech;
import android.speech.tts.TextToSpeech.OnInitListener;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.Spinner;
import android.widget.Toast;

public class AndroidRecognizer extends Activity implements OnInitListener{
 
 TextToSpeech tts;
 
 Button startRecognizer;
 Spinner spinnerResult;
 
 private static final int RQS_RECOGNITION = 1;
 
  /** Called when the activity is first created. */
  @Override
  public void onCreate(Bundle savedInstanceState) {
      super.onCreate(savedInstanceState);
      setContentView(R.layout.main);
   startRecognizer = (Button)findViewById(R.id.startrecognizer);
   startRecognizer.setEnabled(false);
   
   spinnerResult = (Spinner)findViewById(R.id.result);
   
   startRecognizer.setOnClickListener(startRecognizerOnClickListener);
   
   tts = new TextToSpeech(this, this);
    
  }

  private Button.OnClickListener startRecognizerOnClickListener
   = new Button.OnClickListener(){

   @Override
   public void onClick(View arg0) {
    // TODO Auto-generated method stub
    Intent intent = new Intent(RecognizerIntent.ACTION_RECOGNIZE_SPEECH);
    intent.putExtra(RecognizerIntent.EXTRA_LANGUAGE_MODEL,
      RecognizerIntent.LANGUAGE_MODEL_FREE_FORM);
    intent.putExtra(RecognizerIntent.EXTRA_PROMPT,
      "Speech to Recognize");
    startActivityForResult(intent, RQS_RECOGNITION);
   }
  };

 @Override
 protected void onActivityResult(int requestCode, int resultCode, Intent data) {
  // TODO Auto-generated method stub
  if((requestCode == RQS_RECOGNITION) & (resultCode == RESULT_OK)){
   
   ArrayList<String> result = data.getStringArrayListExtra(RecognizerIntent.EXTRA_RESULTS);
     
      ArrayAdapter<String> adapter = new ArrayAdapter<String>(this,
                 android.R.layout.simple_list_item_1, result);
      adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
      spinnerResult.setAdapter(adapter);
    
      spinnerResult.setOnItemSelectedListener(spinnerResultOnItemSelectedListener);
   
  }
   
 }

 private Spinner.OnItemSelectedListener spinnerResultOnItemSelectedListener
 = new Spinner.OnItemSelectedListener(){

  @Override
  public void onItemSelected(AdapterView<?> parent, View view, int position,
    long id) {
   // TODO Auto-generated method stub
   String selectedResult = parent.getItemAtPosition(position).toString();
   Toast.makeText(AndroidRecognizer.this, selectedResult, Toast.LENGTH_SHORT).show();
   tts.speak(selectedResult, TextToSpeech.QUEUE_ADD, null);
   
  }

  @Override
  public void onNothingSelected(AdapterView<?> arg0) {
   // TODO Auto-generated method stub
   
  }};

 @Override
 public void onInit(int arg0) {
  // TODO Auto-generated method stub
  startRecognizer.setEnabled(true);
 }

}

<?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"
  >
<TextView
  android:layout_width="fill_parent"
  android:layout_height="wrap_content"
  android:text="@string/hello"
  />
<Button
  android:id="@+id/startrecognizer"
  android:layout_width="fill_parent"
  android:layout_height="wrap_content"
  android:text="Start Recognizer"
  />
<Spinner
  android:id="@+id/result"
  android:layout_width="fill_parent"
  android:layout_height="wrap_content"
  />
</LinearLayout>

Start Android system's voice recognizer using Intent

package com.AndroidRecognizer;

import java.util.ArrayList;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.speech.RecognizerIntent;
import android.view.View;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.Spinner;

public class AndroidRecognizer extends Activity {
 
 Button startRecognizer;
 Spinner spinnerResult;
 
 private static final int RQS_RECOGNITION = 1;
 
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
     startRecognizer = (Button)findViewById(R.id.startrecognizer);
     spinnerResult = (Spinner)findViewById(R.id.result);
     
     startRecognizer.setOnClickListener(startRecognizerOnClickListener);
        
    }
    
    private Button.OnClickListener startRecognizerOnClickListener
     = new Button.OnClickListener(){

   @Override
   public void onClick(View arg0) {
    // TODO Auto-generated method stub
    Intent intent = new Intent(RecognizerIntent.ACTION_RECOGNIZE_SPEECH);
    intent.putExtra(RecognizerIntent.EXTRA_LANGUAGE_MODEL,
      RecognizerIntent.LANGUAGE_MODEL_FREE_FORM);
    intent.putExtra(RecognizerIntent.EXTRA_PROMPT,
      "Speech to Recognize");
    startActivityForResult(intent, RQS_RECOGNITION);
   }
    };

 @Override
 protected void onActivityResult(int requestCode, int resultCode, Intent data) {
  // TODO Auto-generated method stub
  if((requestCode == RQS_RECOGNITION) & (resultCode == RESULT_OK)){
   
   ArrayList<String> result = data.getStringArrayListExtra(RecognizerIntent.EXTRA_RESULTS);
       
      ArrayAdapter<String> adapter = new ArrayAdapter<String>(this,
                 android.R.layout.simple_list_item_1, result);
      adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
      spinnerResult.setAdapter(adapter);
   
  }
   
 }   
}

<?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"
    >
<TextView  
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content" 
    android:text="@string/hello"
    />
<Button  
    android:id="@+id/startrecognizer"
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content" 
    android:text="Start Recognizer"
    />
<Spinner
    android:id="@+id/result"
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content" 
    />
</LinearLayout>

Implement Android's Text to speech function

package com.AndroidTTS;

import android.app.Activity;
import android.os.Bundle;
import android.speech.tts.TextToSpeech;
import android.speech.tts.TextToSpeech.OnInitListener;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;

public class AndroidTTS extends Activity implements OnInitListener{
 
    TextToSpeech tts;
    EditText textIn;
    Button buttonSpeech;
 
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        
        tts = new TextToSpeech(this, this);
        
        textIn = (EditText)findViewById(R.id.textin);
        buttonSpeech = (Button)findViewById(R.id.speech);
        
        buttonSpeech.setOnClickListener(new Button.OnClickListener(){

   @Override
   public void onClick(View arg0) {
    // TODO Auto-generated method stub
    String textToBeSpeech = textIn.getText().toString();
    tts.speak(textToBeSpeech, TextToSpeech.QUEUE_ADD, null);
   }});
    }

 @Override
 public void onInit(int arg0) {
  // TODO Auto-generated method stub
  //Make sure the Text-To-Speech engine is fully loaded
  //It can be configured and used
  buttonSpeech.setEnabled(true);
 }

 @Override
 protected void onDestroy() {
  // TODO Auto-generated method stub
  super.onDestroy();
  tts.shutdown();
 }
}

<?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"
    >
<TextView  
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content" 
    android:text="@string/hello"
    />
<EditText
    android:id="@+id/textin"
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content" 
    />
<Button
    android:id="@+id/speech"
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content" 
    android:text="Speech"
    android:enabled="false"
    />
</LinearLayout>

Make you App looked like a Dialog

To make your app looked like a dialog, you can use the Android pre-defined Theme.Dialog.

Modify AndroidManifest.xml, to add the code inside
android:theme="@android:style/Theme.Dialog"

example:

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
     package="com.AndroidDialog"
     android:versionCode="1"
     android:versionName="1.0">
   <uses-sdk android:minSdkVersion="4" />

   <application android:icon="@drawable/icon" android:label="@string/app_name">
       <activity android:name=".AndroidDialog"
                 android:label="@string/app_name"
                 android:theme="@android:style/Theme.Dialog">
           <intent-filter>
               <action android:name="android.intent.action.MAIN" />
               <category android:name="android.intent.category.LAUNCHER" />
           </intent-filter>
       </activity>

   </application>
</manifest>