黑莓手机中的声音配置文件更改/音量更改监听器

Question

I want to make an application that listen to the sound profile change/volume change in blackberry. Targeting versions are 5,6,7 I had search in documentation of Blackberry but found nothing. two things i found during searching.

1. globaleventlistener This needs GUID of that event, this event is not documented in event GUID list.

2. Notification manager Notificationmanager might help with one of the register. but i dont know how to register it with system events. It also needs GUID.

please share resource if i missed something. I am new to blackberry development. please help me out.

Thanks, Parth Shah

Answer 1

package mypackage;

import net.rim.device.api.system.Application;
import net.rim.device.api.system.ApplicationDescriptor;
import net.rim.device.api.system.ApplicationManager;
import net.rim.device.api.system.Characters;
import net.rim.device.api.system.GlobalEventListener;
import net.rim.device.api.system.KeyHandlerRegistry;
import net.rim.device.api.system.KeyHandlerRegistryException;
import net.rim.device.api.ui.Keypad;
import net.rim.device.api.ui.UiApplication;

/**
 * This class extends the UiApplication class, providing a
 * graphical user interface.
 */
public class MyApp extends Application
{
    /**
     * Entry point for application
     * @param args Command line arguments (not used)
     */ 
    public static void main(String[] args)
    {
        // Create a new instance of the application and make the currently
        // running thread the application's event dispatch thread.
        MyApp theApp = new MyApp(); 
        theApp.enterEventDispatcher();

    }


/**
 * Creates a new MyApp object
 */
public MyApp()
{        

    //Attach the keylistener to handle buttons pressed  
    addKeyListener(new Logger());

    super.addGlobalEventListener(new GlobalListener());
    try {
          //Any Keypad Button will work to catch everything
        KeyHandlerRegistry.register(getApplication(), Keypad.KEY_CONVENIENCE_1);
            } catch (IllegalArgumentException e) {
        // TODO Auto-generated catch block
        System.out.println(e.toString());
        e.printStackTrace();
    } catch (KeyHandlerRegistryException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }

}  

class GlobalListener implements GlobalEventListener{

    public void eventOccurred(long guid, int data0, int data1, Object object0,
            Object object1) {
                    //will catch and output all Global events to console
        System.out.println("[GLOBAL LISTENER] Event = "+guid);

    }

}

}

This should handle what you both are looking for. As for the custom keyListner:

package mypackage;


import net.rim.device.api.system.Characters;
import net.rim.device.api.system.EventInjector.KeyCodeEvent;
import net.rim.device.api.system.KeyListener;
import net.rim.device.api.ui.Keypad;
import net.rim.device.api.ui.container.MainScreen;


public final class Logger implements KeyListener {
//Set return to false to allow the program to pass the data to next keylistner
//All output to the console.
//Yet from testing only KeyUp and KeyDown are ever called and handle all special buttons 
//Volume, Dial, EndCall, etc...
    public boolean keyChar(char key, int status, int time) {
        System.out.println("CHAR PRESSED: <"+key+"/>");
        return false;
    }

    public boolean keyDown(int keycode, int time) {
        System.out.println("KEY PRESSED (DOWN): < BUTTON="+getKey(keycode)+" ID="+keycode+" KEY VALUE= "+Keypad.key(keycode)+"/>");
        return false;
    }



public boolean keyRepeat(int keycode, int time) { 
    System.out.println("KEY REPEAT: < BUTTON="+getKey(keycode)+" ID="+keycode+"/>");
    return false;
}

public boolean keyStatus(int keycode, int time) {
    System.out.println("KEY STATUS: < BUTTON="+getKey(keycode)+" ID="+keycode+"/>");
    return false;
}

public boolean keyUp(int keycode, int time) {
    System.out.println("KEY PRESSED (UP): < BUTTON="+getKey(keycode)+" ID="+keycode+" KEY VALUE= "+Keypad.key(keycode)+"/>");
    return false;
}

public String getKey(int keycode){
    System.out.println("[EVENT ID] = "+ keycode);
    //Converts the provided keycode into a value which can be compared to the keypad 
    //constants
    keycode = Keypad.key(keycode);

    System.out.println("[KEY ID] = "+ keycode);

    String Result = null;
    switch (keycode) {
    case Keypad.KEY_ALT:
        Result = "ALT";
        break;
    case Keypad.KEY_BACKLIGHT:
            Result = "BACKLIGHT";
            break;
    case Keypad.KEY_BACKSPACE:
        Result = "BACKSPACE";
        break;
    case Keypad.KEY_BACKWARD:
        Result = "BACKWARD";
        break;
    case Keypad.KEY_CAMERA_FOCUS:
        Result = "CAMERA_FOCUS";
        break;
    case Keypad.KEY_MIDDLE:
        Result = "CONVENIENCE_1";
        break;
    case Keypad.KEY_CONVENIENCE_2:
        Result = "CONVENIENCE_2";
        break;
    case Keypad.KEY_DELETE:
        Result = "DELETE";
        break;
    case Keypad.KEY_END:
        Result = "END_CALL_BUTTON";
        break;
    case Keypad.KEY_ENTER:
        Result = "ENTER";
        break;
    case Keypad.KEY_ESCAPE:
        Result = "ESCAPE";
        break;
    case Keypad.KEY_FORWARD:
        Result = "FORWARD";
        break;
    case Keypad.KEY_LOCK:
        Result = "LOCK";
        break;
    case Keypad.KEY_MENU:
        Result = "MENU";
        break;

    case Keypad.KEY_NEXT:
        Result = "NEXT";
        break;
    case Keypad.KEY_RIGHT_3:
        Result = "RIGHT_3";
        break;
    case Keypad.KEY_SEND:
        Result = "DIAL";
        break;
    case Keypad.KEY_SHIFT_LEFT:
        Result = "SHIFT_LEFT";
        break;
    case Keypad.KEY_SHIFT_RIGHT:
        Result = "SHIFT_RIGHT";
        break;
    case Keypad.KEY_SHIFT_X:
        Result = "SHIFT_X";
        break;
    case Keypad.KEY_SPACE:
        Result = "SPACE";
        break;
    case Keypad.KEY_SPEAKERPHONE:
        Result = "SPEAKERPHONE";
        break;
    case Keypad.KEY_VOLUME_DOWN:
        Result = "VOLUME_DOWN";
        break;
    case Keypad.KEY_VOLUME_UP:
        Result = "VOLUME_UP";
        break;
    default:
        Result = null;
        break;
    }

    return Result;
}

}