Live Wallpaper动态壁纸开发

核心提示：private StringmShape = "smpte";TestPatternEngine(){ final Paint paint = mPaint; paint.setColor(0xffffffff); paint.setAntiAlias(true); paint.setStrokeW

　private String　　mShape　 = "smpte";

　TestPatternEngine()
　{
　 final Paint paint = mPaint;
　 paint.setColor(0xffffffff);
　 paint.setAntiAlias(true);
　 paint.setStrokeWidth(2);
　 paint.setStrokeCap(Paint.Cap.ROUND);
　 paint.setStyle(Paint.Style.STROKE);

　 mPreferences = LiveWallpaper.this.getSharedPreferences(SHARED_PREFS_NAME, 0);
　 mPreferences.registerOnSharedPreferenceChangeListener(this);
　 onSharedPreferenceChanged(mPreferences, null);
　}

　public void onSharedPreferenceChanged(SharedPreferences prefs,
　　String key)
　{
　 mShape = prefs.getString("livewallpaper_testpattern", "smpte");
　 mMotion = prefs.getBoolean("livewallpaper_movement", true);
　 readColors();
　}

　private void readColors()
　{

　 int pid = getResources().getIdentifier(mShape + "colors", "array", getPackageName());

　 rectColor = getResources().getIntArray(pid);
　 mRectCount = rectColor.length;
　 mColorRectangles = new Rect[mRectCount];

　 System.out.println("mRectCount "+mRectCount);
　 initFrameParams();
　}

　@Override
　public void onCreate(SurfaceHolder surfaceHolder)
　{
　 super.onCreate(surfaceHolder);
　 setTouchEventsEnabled(true);
　}

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

　@Override
　public void onVisibilityChanged(boolean visible)
　{
　 mVisible = visible;
　 if (visible)
　 {
　　drawFrame();
　 }
　 else
　 {
　　mHandler.removeCallbacks(mDrawPattern);
　 }
　}

　@Override
　public void onSurfaceChanged(SurfaceHolder holder, int format,
　　int width, int height)
　{
　 super.onSurfaceChanged(holder, format, width, height);

　 initFrameParams();

　 drawFrame();
　}

　@Override
　public void onSurfaceCreated(SurfaceHolder holder)
　{
　 super.onSurfaceCreated(holder);
　}

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

　@Override
　public void onOffsetsChanged(float xOffset, float yOffset, float xStep,
　　float yStep, int xPixels, int yPixels)
　{

　 drawFrame();
　}

　 @Override
　public void onTouchEvent(MotionEvent event)
　{
　 if (event.getAction() == MotionEvent.ACTION_MOVE)
　 {
　　mTouchX = event.getX();
　　mTouchY = event.getY();
　 }
　 else
　 {
　　mTouchX = -1;
　　mTouchY = -1;
　 }
　 super.onTouchEvent(event);
　}

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

　 Canvas c = null;
　 try
　 {
　　c = holder.lockCanvas();
　　if (c != null)
　　{
　　 // draw something
　　 drawPattern(c);
　　 drawTouchPoint(c);
　　}
　 }
　 finally
　 {
　　if (c != null)