动圈上的动态壁纸 [英] Moving Circle on Live Wallpaper
本文介绍了动圈上的动态壁纸的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我要绘制动态壁纸了一圈，当它接触绘画的方向被扭转的边界（如在曲折格式的东西）。
问题是我能够画出圆圈这种格式。但是：
- 如何删除previously绘制的圆，因此只有单一的圆（点）是一次明显的。
- 当我重新绘制位图它开始闪烁，为什么出现这种情况？
code是如下：
主题绘制圆：
{animRunnable =新的Runnable（）{
公共无效的run（）{ 如果（！isRightEndReached＆放大器;＆安培; moveCircleX＆LT; 320）{
moveCircleX ++;
moveCircleY ++; }否则如果（isRightEndReached）{
moveCircleX--;
moveCircleY ++; } 如果（moveCircleX＆GT; = 320）{
isRightEndReached = TRUE; }如果别人（moveCircleX＆LT; = 0）{
isRightEndReached = FALSE;
} moveCircle（moveCircleX，moveCircleY）; 如果（moveCircleY == 480）{
屏幕-re-初始化x和y点//年底移动圆。
moveCircleX = intialStartX-10;
moveCircleY = intialStartY + 1;
isRightEndReached = FALSE; //显示壁纸。
showWallpaper（）; moveCircle（moveCircleX，moveCircleY）; } }
};
/ **
*方法动圈
*
* @参数点¯x
* @参数ÿ
* /
私人无效moveCircle（INT X，int y）对{ Log.d（X ==+ X，Y ==+ Y）; 涂料粉刷=新的油漆（）;
SurfaceHolder surfaceHolder = getSurfaceHolder（）;
帆布帆布= NULL;
尝试{
画布= surfaceHolder.lockCanvas（）;
如果（帆布！= NULL）{
canvas.save（）;
paint.setColor（Color.RED）;
canvas.drawCircle（X，Y，5，油漆）; canvas.restore（）; }
}赶上（例外五）{
e.printStackTrace（）;
} 最后{
如果（帆布！= NULL）{
surfaceHolder.unlockCanvasAndPost（画布）;
}
}
animHandler.removeCallbacks（animRunnable）;
如果（ISVISIBLE（））{
animHandler.postDelayed（animRunnable，1000L / 500L）;
}
}
//显示壁纸的方法。/ **
*方法来显示壁纸。
* /
无效showWallpaper（）{
SurfaceHolder surfaceHolder = getSurfaceHolder（）;
帆布帆布= NULL;
尝试{
画布= surfaceHolder.lockCanvas（）; 如果（帆布！= NULL）{ System.out的
.println（绘制于秀壁纸方法的位图。）;
canvas.save（）; BitmapFactory.Options选项=新BitmapFactory.Options（）;
options.inPurgeable = TRUE;
位= BitmapFactory.de codeResource（getResources（）
R.drawable.aquarium，期权）; canvas.drawColor（0xff000000）; canvas.drawBitmap（位图，0，0，NULL）;
canvas.restore（）; }
} {最后
如果（帆布！= NULL）{
surfaceHolder.unlockCanvasAndPost（画布）;
}
} }}
解决方案
解决：最后我得到通过不集中移除圈，但与新的点一次又一次绘制位图的解决方案。该方法如下：
{
BitmapFactory.Options选项=新BitmapFactory.Options（）;
options.inPurgeable = TRUE;
位= BitmapFactory.de codeResource（getResources（）
R.drawable.aquarium，期权）;
涂料粉刷=新的油漆（）;/ **
*方法移动一圈即绘制新的圆位置的位图。
*
* @参数点¯x
* @参数ÿ
* /
私人无效renderBackground（INT X，int y）对{ Log.d（X ==+ X，Y ==+ Y）;
surfaceHolder = getSurfaceHolder（）;
帆布帆布= NULL;
尝试{
画布= surfaceHolder.lockCanvas（）; 如果（帆布！= NULL）{
paint.setColor（Color.RED）; canvas.save（）; //设置回地面
canvas.drawBitmap（位图，0，0，NULL）; //写画的圆。
paint.setAntiAlias（真）;
canvas.drawCircle（X，Y，15，漆）; canvas.restore（）; bitmap.recycle（）; }
}赶上（例外五）{
e.printStackTrace（）;
} 最后{
如果（帆布！= NULL）{
surfaceHolder.unlockCanvasAndPost（画布）;
// showWallpaper（）;
}
}
animHandler.removeCallbacks（animRunnable）;
如果（ISVISIBLE（））{
animHandler.postDelayed（animRunnable，1000L / 25L）;
}
}
}
I have to draw a circle in live wallpaper when it touches the boundary the direction of drawing gets reversed (something like in zigzag format).
The problem is i am able to draw circle in this format. But:
- How to remove the previously drawn circle so that only single circle (dot) is visible at a time.
- When i redraw the bitmap it starts flickering why this happens?
Code is as follows:
Thread to draw circle:
{animRunnable = new Runnable() {
public void run() {
if (!isRightEndReached && moveCircleX < 320) {
moveCircleX++;
moveCircleY++;
} else if (isRightEndReached) {
moveCircleX--;
moveCircleY++;
}
if (moveCircleX >= 320) {
isRightEndReached = true;
} else if (moveCircleX <= 0) {
isRightEndReached = false;
}
moveCircle(moveCircleX, moveCircleY);
if (moveCircleY == 480) {
// end of screen -re-init x and y point to move circle.
moveCircleX = intialStartX-10;
moveCircleY = intialStartY+1;
isRightEndReached = false;
// show wallpaper.
showWallpaper();
moveCircle(moveCircleX, moveCircleY);
}
}
};
/**
* Method to move circle
*
* @param x
* @param y
*/
private void moveCircle(int x, int y) {
Log.d("x==" + x, "y==" + y);
Paint paint = new Paint();
SurfaceHolder surfaceHolder = getSurfaceHolder();
Canvas canvas = null;
try {
canvas = surfaceHolder.lockCanvas();
if (canvas != null) {
canvas.save();
paint.setColor(Color.RED);
canvas.drawCircle(x, y, 5, paint);
canvas.restore();
}
} catch (Exception e) {
e.printStackTrace();
}
finally {
if (canvas != null) {
surfaceHolder.unlockCanvasAndPost(canvas);
}
}
animHandler.removeCallbacks(animRunnable);
if (isVisible()) {
animHandler.postDelayed(animRunnable, 1000L / 500L);
}
}
//Show wallpaper method.
/**
* Method to show wallpaper.
*/
void showWallpaper() {
SurfaceHolder surfaceHolder = getSurfaceHolder();
Canvas canvas = null;
try {
canvas = surfaceHolder.lockCanvas();
if (canvas != null) {
System.out
.println("Drawing bitmap in show Wallpaper method.");
canvas.save();
BitmapFactory.Options options = new BitmapFactory.Options();
options.inPurgeable = true;
bitmap = BitmapFactory.decodeResource(getResources(),
R.drawable.aquarium, options);
canvas.drawColor(0xff000000);
canvas.drawBitmap(bitmap, 0, 0, null);
canvas.restore();
}
} finally {
if (canvas != null) {
surfaceHolder.unlockCanvasAndPost(canvas);
}
}
}
}
解决方案
SOLVED: finally i got the solution by not concentrating on removing circle but drawing bitmap again and again with new point. The method is as follows:
{
BitmapFactory.Options options = new BitmapFactory.Options();
options.inPurgeable = true;
bitmap = BitmapFactory.decodeResource(getResources(),
R.drawable.aquarium, options);
Paint paint = new Paint();
/**
* Method to move circle i.e to draw bitmap with new circle position.
*
* @param x
* @param y
*/
private void renderBackground(int x, int y) {
Log.d("x==" + x, "y==" + y);
surfaceHolder = getSurfaceHolder();
Canvas canvas = null;
try {
canvas = surfaceHolder.lockCanvas();
if (canvas != null) {
paint.setColor(Color.RED);
canvas.save();
// set Back ground
canvas.drawBitmap(bitmap, 0, 0, null);
// write draw circle.
paint.setAntiAlias(true);
canvas.drawCircle(x, y, 15, paint);
canvas.restore();
bitmap.recycle();
}
} catch (Exception e) {
e.printStackTrace();
}
finally {
if (canvas != null) {
surfaceHolder.unlockCanvasAndPost(canvas);
// showWallpaper();
}
}
animHandler.removeCallbacks(animRunnable);
if (isVisible()) {
animHandler.postDelayed(animRunnable, 1000L / 25L);
}
}
}
这篇关于动圈上的动态壁纸的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
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