:D

package pe.berabue.livewallpaper;

import android.os.Bundle;
import android.preference.CheckBoxPreference;
import android.preference.EditTextPreference;
import android.preference.Preference;
import android.preference.PreferenceActivity;
import android.preference.Preference.OnPreferenceChangeListener;
import android.preference.Preference.OnPreferenceClickListener;
import android.util.Log;

public class LiveWallPaPer_Canvas extends PreferenceActivity implements OnPreferenceClickListener, OnPreferenceChangeListener {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        addPreferencesFromResource(R.layout.option);
        
        EditTextPreference editName = (EditTextPreference)findPreference("et_name");
        CheckBoxPreference checkDraw = (CheckBoxPreference)findPreference("cb_draw");
        editName.setOnPreferenceChangeListener(this);
        checkDraw.setOnPreferenceClickListener(this);
        
        // fluit category
        CheckBoxPreference checkFluit_01 = (CheckBoxPreference)findPreference("fluit_01");
        checkFluit_01.setOnPreferenceClickListener(this);
    }

	@Override
	public boolean onPreferenceClick(Preference preference) {
		if ( preference.getKey().equals("cb_draw")) {
			boolean isDraw = preference.getSharedPreferences().getBoolean("cb_draw", false);
			Log.v(null,"Click CheckPreference : "+isDraw);
			
			WallPaPer_Canvas.isDraw = isDraw;
		}
		if ( preference.getKey().equals("fluit_01") ) {
			Log.v(null,"Click fluit_01");
		}
		return false;
	}

	@Override
	public boolean onPreferenceChange(Preference preference, Object newValue) {
		if ( preference.getKey().equals("et_name") ) {
			preference.setSummary((CharSequence) newValue);
			Log.v(null,""+newValue);
		}
		return false;
	}
}

if (canvas != null) {
	if ( isDraw )
		canvas.drawBitmap(imgIcon, 0, 0, null);
}

package pe.berabue.livewallpaper;

import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.os.Handler;
import android.service.wallpaper.WallpaperService;
import android.util.Log;
import android.view.MotionEvent;
import android.view.SurfaceHolder;

public class WallPaPer_Canvas extends WallpaperService {
    	
	private final Handler mHandler = new Handler();
	
	@Override
	public void onCreate() {
		super.onCreate();
	}
	
	@Override
	public void onDestroy() {
		super.onDestroy();
	}

	@Override
	public Engine onCreateEngine() {
		return new CanvasEngine();
	}

	private class CanvasEngine extends Engine {  

		private Bitmap imgIcon;
		
		private final Runnable mRunnable = new Runnable() {
			public void run() {
				drawFrame();
			}
		};
		private boolean isVisible;
	        
		public CanvasEngine() {
			imgIcon = BitmapFactory.decodeResource(getApplicationContext().getResources(), R.drawable.icon);
		}
		
		@Override
		public void onCreate(SurfaceHolder surfaceHolder) {
			super.onCreate(surfaceHolder);
			setTouchEventsEnabled(true);
		}

		@Override
		public void onDestroy() {
			super.onDestroy();
			mHandler.removeCallbacks(mRunnable);
		}

		@Override
		public void onVisibilityChanged(boolean visible) {
			isVisible = visible;

			if (visible) {
				drawFrame();
			} else {
				mHandler.removeCallbacks(mRunnable);
			}
		}

		@Override
		public void onSurfaceCreated(SurfaceHolder holder) {
			super.onSurfaceCreated(holder);
		}
		
		@Override
		public void onSurfaceChanged(SurfaceHolder holder, int format, int width, int height) {
			super.onSurfaceChanged(holder, format, width, height);
			Log.v(null," :::: onSurfaceChanged : "+format+" / "+width+", "+height);
			drawFrame();
		}

		@Override
		public void onSurfaceDestroyed(SurfaceHolder holder) {
			super.onSurfaceDestroyed(holder);
			isVisible = false;
			mHandler.removeCallbacks(mRunnable);
		}

		@Override
		public void onOffsetsChanged(float xOffset, float yOffset, float xStep, float yStep, int xPixels, int yPixels) {
			Log.v(null," :::: onOffsetsChanged : "+xOffset+", "+yOffset+", "+xStep+", "+yStep+", "+xPixels+", "+yPixels);
			drawFrame();
		}

		@Override
		public void onTouchEvent(MotionEvent event) {
			if (event.getAction() == MotionEvent.ACTION_DOWN) {
				Log.v(null," :::: onTouchEvent");
			}
			super.onTouchEvent(event);
		}

		public void drawFrame() {
			final SurfaceHolder holder = getSurfaceHolder();

			Canvas canvas = null;
			try {
				canvas = holder.lockCanvas();
				if (canvas != null) {
					canvas.drawBitmap(imgIcon, 0, 0, null);
				}
			} finally {
				if (canvas != null)
					holder.unlockCanvasAndPost(canvas);
			}

			mHandler.removeCallbacks(mRunnable);
			if (isVisible) {
				mHandler.postDelayed(mRunnable, 1000 / 25);
			}
		}
	}
}