当我们滚动时,主屏幕的前景(图标、小部件等)向左或向右移动整个屏幕宽度,但背景图像(或动态壁纸)仅移动该宽度的一小部分。我的问题是如何获得这种效果。到现在为止已经做到了。
SurfaceHolder holder = getSurfaceHolder();
Canvas canvas = null;
try {
canvas = holder.lockCanvas();
if (canvas != null) {
drawCircles(canvas);
}
} finally {
if (canvas != null)
holder.unlockCanvasAndPost(canvas);
}
绘图功能是
{
private void draw(Canvas canvas) {
Paint paint = new Paint();
DisplayMetrics metdisplayMatrics = new DisplayMetrics();
Display display = ((WindowManager) getSystemService(WINDOW_SERVICE)).getDefaultDisplay();
display.getMetrics(metdisplayMatrics);
canvas.save();
canvas.drawColor(0xff000000);
mRecscreenRectangleFrame = new Rect(0, 0, (int) (metdisplayMatrics.widthPixels*2.0), metdisplayMatrics.heightPixels);
photo1= BitmapFactory.decodeResource(getResources(), R.drawable.img1);
canvas.drawBitmap(photo1, null,mRecscreenRectangleFrame, paint);
photo1.recycle();
System.gc();
}
现在如何把动态壁纸视差滚动效果。
@Override
public void onOffsetsChanged(float xOffset, float yOffset,
float xOffsetStep, float yOffsetStep, int xPixelOffset,
int yPixelOffset) {
super.onOffsetsChanged(xOffset, yOffset, xOffsetStep, yOffsetStep,
xPixelOffset, yPixelOffset);
WallpaperManager myWallpaperManager = WallpaperManager.getInstance(getApplicationContext());
View view=new View(getBaseContext());
myWallpaperManager.setWallpaperOffsets(view.getWindowToken(),xOffset, 0f);
}
还没有工作......