我正在寻找一种解决方案，让一些符号（数量为5个）在背景imageview上移动。
因此，如果我移动背景，符号必须保留在我放弃背景的位置上。
我想知道的是，要搜索什么才能获得正确的信息。
这是我到目前为止所做的：
public class MyTouchListener implements View.OnTouchListener {
@Override
public boolean onTouch(View view, MotionEvent event) {
switch (view.getId()) {
case R.id.background:
ImageView view2 = (ImageView) view;
view2.setScaleType(ImageView.ScaleType.MATRIX);
float scale;
dumpEvent(event);
//Handle touch events here...
switch (event.getAction() & MotionEvent.ACTION_MASK) {
case MotionEvent.ACTION_DOWN: //first finger down only
savedMatrix.set(matrix);
start.set(event.getX(), event.getY());
Log.d(TAG, "mode=DRAG");
mode = DRAG;
break;
case MotionEvent.ACTION_UP://first finger lifted
case MotionEvent.ACTION_POINTER_UP: //second finger lifted
mode = NONE;
Log.d(TAG, "mode=NONE");
break;
case MotionEvent.ACTION_POINTER_DOWN: //first and second finger down
oldDist = spacing(event);
Log.d(TAG, "oldDist=" + oldDist);
if (oldDist > 10f) {
savedMatrix.set(matrix);
midPoint(mid, event);
mode = ZOOM;
Log.d(TAG, "mode=ZOOM");
}
break;
case MotionEvent.ACTION_MOVE:
if (mode == DRAG) {
//test.set(skizze.getX(),skizze.getY());
//feuerloescher.setX(test.x);
//feuerloescher.setY(test.y);
int[] locations = new int[2];
feuerloescher.getLocationOnScreen(locations);
Log.d("Test",String.valueOf(locations[0]) + " " + String.valueOf(locations[1]));
matrix.set(savedMatrix);
matrix.postTranslate(event.getX() - start.x, event.getY() - start.y); //create the transformation in the matrix of points
} else if (mode == ZOOM) {
float[] f = new float[9];
//pinch zooming
float newDist = spacing(event);
Log.d(TAG, "newDist=" + newDist);
if (newDist > 10f) {
matrix.set(savedMatrix);
scale = newDist / oldDist; //setting the scaling of the matrix...
//if scale > 1 means zoom in
// if scale < 1 means zoom out
matrix.postScale(scale, scale, mid.x, mid.y);
//scale = Math.max(MIN_ZOOM, Math.min(scale, MAX_ZOOM));
}
matrix.getValues(f);
float scaleX = f[Matrix.MSCALE_X];
float scaleY = f[Matrix.MSCALE_Y];
//Einstellungen minimaler oder maximaler zoom
if (scaleX <= MIN_ZOOM) {
matrix.postScale((MIN_ZOOM) / scaleX, (MIN_ZOOM) / scaleY, mid.x, mid.y);
} else if (scaleX >= MAX_ZOOM) {
matrix.postScale((MAX_ZOOM) / scaleX, (MAX_ZOOM) / scaleY, mid.x, mid.y);
}
}
break;
}
view2.setImageMatrix(matrix); //display the transformation on screen
break;
case R.id.symbol1:
dumpEvent(event);
final int X = (int) event.getRawX();
final int Y = (int) event.getRawY();
//Definition MotionEvent.ACTION_MASK: Bit mask of the parts of the action code that are the action itself.
switch (event.getAction() & MotionEvent.ACTION_MASK) {
case MotionEvent.ACTION_DOWN:
FrameLayout.LayoutParams layoutParams = (FrameLayout.LayoutParams) view.getLayoutParams();
//RelativeLayout.LayoutParams lParams = (RelativeLayout.LayoutParams) view.getLayoutParams();
_xDelta = X - layoutParams.leftMargin;
_yDelta = Y - layoutParams.topMargin;
break;
case MotionEvent.ACTION_UP:
break;
case MotionEvent.ACTION_POINTER_DOWN:
break;
case MotionEvent.ACTION_POINTER_UP:
break;
case MotionEvent.ACTION_MOVE:
FrameLayout.LayoutParams layoutParams1 = (FrameLayout.LayoutParams) view.getLayoutParams();
//RelativeLayout.LayoutParams layoutParams = (RelativeLayout.LayoutParams) view
// .getLayoutParams();
layoutParams1.leftMargin = X - _xDelta;
layoutParams1.topMargin = Y - _yDelta;
layoutParams1.rightMargin = -250;
layoutParams1.bottomMargin = -250;
view.setLayoutParams(layoutParams1);
break;
}
root.invalidate();
break;
}
return true;
}
}
有背景和符号1。 如您所见，我也为背景实现了缩放功能。 但这是另一个我不想讨论的问题。 我的第一个问题是如果我移动所有符号，请移动所有符号。
这样做的正确方法是什么？
答案 0 :(得分：1)
忽略如何使图像可拖动。
它应该使用RelativeLayout并覆盖可拖动视图的onTouchListener。
只需获取动作事件ACTION_UP事件的值即可获得用户放下图像的X，Y。
然后设置它：
RelativeLayout.LayoutParams prms = view.getLayoutParams();
prms.setMargins(X,Y,0,0);
view.setLayoutParams(prms);
希望这有帮助。