すべてを試した後、完全にあきらめる前に、ここにいる誰かが私の問題を知っているかどうかを確認しようと思いました. 私がやろうとしているのは、この「回転する立方体」の後ろに画像をスライドさせることです。たとえば、携帯電話を右に傾けると、右にスライドし始め、その逆も同様です。
これがコードです。非常に長く、この質問には意味のないコードがたくさんありますが、重要ではない部分を無視して、いっぱいにすることを考えました。sdkで提供されているCubeWallpaper1のサンプルです。私はちょうどそれを変更し、それに加速度計を追加して動作させようとしました。
それで、見てみて、何が悪いのか教えていただければ。
public class LiveWall extends WallpaperService implements SensorEventListener {
float xAxis,yAxis,zAxis;
private SensorManager mSensorManager;
private Sensor mAccelerometer;
Bitmap drawable;
private final Handler mHandler = new Handler();
@Override
public void onCreate() {
super.onCreate();
mSensorManager = (SensorManager)getSystemService(SENSOR_SERVICE);
mAccelerometer = mSensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER);
drawable = BitmapFactory.decodeResource(getResources(),R.drawable.bg);
mSensorManager.registerListener(this, mSensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER), SensorManager.SENSOR_DELAY_NORMAL);
}
public void onAccuracyChanged(Sensor arg0, int arg1) {
// TODO Auto-generated method stub
}
public void onSensorChanged(SensorEvent event) {
xAxis = event.values[0];
yAxis = event.values[1];
zAxis = event.values[2];
}
@Override
public void onDestroy() {
super.onDestroy();
}
@Override
public Engine onCreateEngine() {
return new CubeEngine();
}
class CubeEngine extends Engine {
private final Paint mPaint = new Paint();
private float mOffset;
private float mTouchX = -1;
private float mTouchY = -1;
private long mStartTime;
private float mCenterX;
private float mCenterY;
private final Runnable mDrawCube = new Runnable() {
public void run() {
drawFrame();
}
};
private boolean mVisible;
CubeEngine() {
// Create a Paint to draw the lines for our cube
final Paint paint = mPaint;
paint.setColor(Color.GREEN);
paint.setAntiAlias(true);
paint.setStrokeWidth(15);
paint.setStrokeCap(Paint.Cap.ROUND);
paint.setStyle(Paint.Style.STROKE);
mStartTime = SystemClock.elapsedRealtime();
}
@Override
public void onCreate(SurfaceHolder surfaceHolder) {
super.onCreate(surfaceHolder);
// By default we don't get touch events, so enable them.
setTouchEventsEnabled(true);
}
@Override
public void onDestroy() {
super.onDestroy();
mHandler.removeCallbacks(mDrawCube);
}
@Override
public void onVisibilityChanged(boolean visible) {
mVisible = visible;
if (visible) {
drawFrame();
} else {
mHandler.removeCallbacks(mDrawCube);
}
}
@Override
public void onSurfaceChanged(SurfaceHolder holder, int format, int width, int height) {
super.onSurfaceChanged(holder, format, width, height);
// store the center of the surface, so we can draw the cube in the right spot
mCenterX = width/2.0f;
mCenterY = height/2.0f;
drawFrame();
}
@Override
public void onSurfaceCreated(SurfaceHolder holder) {
super.onSurfaceCreated(holder);
}
@Override
public void onSurfaceDestroyed(SurfaceHolder holder) {
super.onSurfaceDestroyed(holder);
mVisible = false;
mHandler.removeCallbacks(mDrawCube);
}
@Override
public void onOffsetsChanged(float xOffset, float yOffset,
float xStep, float yStep, int xPixels, int yPixels) {
mOffset = xOffset;
drawFrame();
}
/*
* Store the position of the touch event so we can use it for drawing later
*/
@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);
}
/*
* Draw one frame of the animation. This method gets called repeatedly
* by posting a delayed Runnable. You can do any drawing you want in
* here. This example draws a wireframe cube.
*/
void drawFrame() {
final SurfaceHolder holder = getSurfaceHolder();
Canvas c = null;
try {
c = holder.lockCanvas();
if (c != null) {
// draw something
drawCube(c);
drawTouchPoint(c);
}
} finally {
if (c != null) holder.unlockCanvasAndPost(c);
}
// Reschedule the next redraw
mHandler.removeCallbacks(mDrawCube);
if (mVisible) {
mHandler.postDelayed(mDrawCube, 1000 / 25);
}
}
/*
* Draw a wireframe cube by drawing 12 3 dimensional lines between
* adjacent corners of the cube
*/
void drawCube(Canvas c) {
c.save();
c.translate(mCenterX, mCenterY);
c.drawColor(0xff000000);
c.drawBitmap(drawable, 0+xAxis,0+yAxis, mPaint);
drawLine(c, -400, -400, -400, 400, -400, -400);
drawLine(c, 400, -400, -400, 400, 400, -400);
drawLine(c, 400, 400, -400, -400, 400, -400);
drawLine(c, -400, 400, -400, -400, -400, -400);
drawLine(c, -400, -400, 400, 400, -400, 400);
drawLine(c, 400, -400, 400, 400, 400, 400);
drawLine(c, 400, 400, 400, -400, 400, 400);
drawLine(c, -400, 400, 400, -400, -400, 400);
drawLine(c, -400, -400, 400, -400, -400, -400);
drawLine(c, 400, -400, 400, 400, -400, -400);
drawLine(c, 400, 400, 400, 400, 400, -400);
drawLine(c, -400, 400, 400, -400, 400, -400);
c.restore();
}
/*
* Draw a 3 dimensional line on to the screen
*/
void drawLine(Canvas c, int x1, int y1, int z1, int x2, int y2, int z2) {
long now = SystemClock.elapsedRealtime();
float xrot = ((float)(now - mStartTime)) / 1000;
float yrot = (0.5f - mOffset) * 2.0f;
float zrot = 0;
// 3D transformations
// rotation around X-axis
float newy1 = (float)(Math.sin(xrot) * z1 + Math.cos(xrot) * y1);
float newy2 = (float)(Math.sin(xrot) * z2 + Math.cos(xrot) * y2);
float newz1 = (float)(Math.cos(xrot) * z1 - Math.sin(xrot) * y1);
float newz2 = (float)(Math.cos(xrot) * z2 - Math.sin(xrot) * y2);
// rotation around Y-axis
float newx1 = (float)(Math.sin(yrot) * newz1 + Math.cos(yrot) * x1);
float newx2 = (float)(Math.sin(yrot) * newz2 + Math.cos(yrot) * x2);
newz1 = (float)(Math.cos(yrot) * newz1 - Math.sin(yrot) * x1);
newz2 = (float)(Math.cos(yrot) * newz2 - Math.sin(yrot) * x2);
// 3D-to-2D projection
float startX = newx1 / (4 - newz1 / 400);
float startY = newy1 / (4 - newz1 / 400);
float stopX = newx2 / (4 - newz2 / 400);
float stopY = newy2 / (4 - newz2 / 400);
c.drawLine(startX, startY, stopX, stopY, mPaint);
}
/*
* Draw a circle around the current touch point, if any.
*/
void drawTouchPoint(Canvas c) {
if (mTouchX >=0 && mTouchY >= 0) {
c.drawCircle(mTouchX, mTouchY, 80, mPaint);
}
}
}
}