我是 android 开发的新手,抱歉,如果我问了一些愚蠢的问题,请尝试帮助我。我正在尝试在 RelativeLayout 中实现 Zoom 和 pinch。我想制作自己的 map View ,在其中获取平面图的图像并在其上绘制图钉 (ImageVIew)。我试过了,但我目前无法点击别针。我在这些帖子的帮助下完成了代码
Extending RelativeLayout, and overriding dispatchDraw() to create a zoomable ViewGroup
和
Android - zoom in/out RelativeLayout with spread/pinch
我的代码是
public class TempView extends RelativeLayout {
private static final int INVALID_POINTER_ID = -1;
private Drawable mIcon;
private float mPosX;
private float mPosY;
TempView temp;
private float mLastTouchX;
private float mLastTouchY;
private int mActivePointerId = INVALID_POINTER_ID;
private ScaleGestureDetector mScaleDetector;
private float mScaleFactor = 1.f;
public TempView(Context context) {
this(context, null, 0);
temp = this;
}
public TempView(Context context, AttributeSet attrs) {
this(context, attrs, 0);
temp = this;
}
public TempView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
mIcon = context.getResources().getDrawable(R.drawable.ic_launcher);
mIcon.setBounds(0, 0, mIcon.getIntrinsicWidth(), mIcon.getIntrinsicHeight());
temp = this;
mScaleDetector = new ScaleGestureDetector(context, new ScaleListener());
}
@Override
public boolean onTouchEvent(MotionEvent ev) {
// Let the ScaleGestureDetector inspect all events.
mScaleDetector.onTouchEvent(ev);
final int action = ev.getAction();
switch (action & MotionEvent.ACTION_MASK) {
case MotionEvent.ACTION_DOWN: {
final float x = ev.getX();
final float y = ev.getY();
mLastTouchX = x;
mLastTouchY = y;
mActivePointerId = ev.getPointerId(0);
break;
}
case MotionEvent.ACTION_MOVE: {
final int pointerIndex = ev.findPointerIndex(mActivePointerId);
final float x = ev.getX(pointerIndex);
final float y = ev.getY(pointerIndex);
// Only move if the ScaleGestureDetector isn't processing a gesture.
if (!mScaleDetector.isInProgress()) {
final float dx = x - mLastTouchX;
final float dy = y - mLastTouchY;
mPosX += dx;
mPosY += dy;
invalidate();
}
mLastTouchX = x;
mLastTouchY = y;
break;
}
case MotionEvent.ACTION_UP: {
mActivePointerId = INVALID_POINTER_ID;
break;
}
case MotionEvent.ACTION_CANCEL: {
mActivePointerId = INVALID_POINTER_ID;
break;
}
case MotionEvent.ACTION_POINTER_UP: {
final int pointerIndex = (ev.getAction() & MotionEvent.ACTION_POINTER_INDEX_MASK)
>> MotionEvent.ACTION_POINTER_INDEX_SHIFT;
final int pointerId = ev.getPointerId(pointerIndex);
if (pointerId == mActivePointerId) {
// This was our active pointer going up. Choose a new
// active pointer and adjust accordingly.
final int newPointerIndex = pointerIndex == 0 ? 1 : 0;
mLastTouchX = ev.getX(newPointerIndex);
mLastTouchY = ev.getY(newPointerIndex);
mActivePointerId = ev.getPointerId(newPointerIndex);
}
break;
}
}
return true;
}
@Override
protected void onLayout(boolean changed, int l, int t, int r, int b)
{
int count = getChildCount();
Log.d("onLayout", ""+count);
for(int i=0;i<count;i++){
View child = getChildAt(i);
if(child.getVisibility()!=GONE ){
RelativeLayout.LayoutParams params = (RelativeLayout.LayoutParams)child.getLayoutParams();
child.layout(
(int)(params.leftMargin * mScaleFactor),
(int)(params.topMargin * mScaleFactor),
(int)((params.leftMargin + child.getMeasuredWidth()) * mScaleFactor),
(int)((params.topMargin + child.getMeasuredHeight()) * mScaleFactor)
);
child.setLayoutParams(params);
}
}
}
@Override
public void onDraw(Canvas canvas) {
super.onDraw(canvas);
canvas.save(Canvas.MATRIX_SAVE_FLAG);
canvas.translate(mPosX, mPosY);
canvas.scale(mScaleFactor, mScaleFactor);
Log.d("onDraw", ""+mScaleFactor);
int count = getChildCount();
for(int i=0;i<count;i++){
View child = getChildAt(i);
if(child.getVisibility()!=GONE){
child.draw(canvas);
Log.d("onDraw", ""+mScaleFactor);
}
}
canvas.restore();
}
@Override
protected void dispatchDraw(Canvas canvas) {
canvas.save(Canvas.MATRIX_SAVE_FLAG);
canvas.translate(mPosX, mPosY);
canvas.scale(mScaleFactor, mScaleFactor);
super.dispatchDraw(canvas);
canvas.restore();
}
private class ScaleListener extends ScaleGestureDetector.SimpleOnScaleGestureListener {
@Override
public boolean onScale(ScaleGestureDetector detector) {
mScaleFactor *= detector.getScaleFactor();
// Don't let the object get too small or too large.
mScaleFactor = Math.max(1.0f, Math.min(mScaleFactor, 5.0f));
// Log.d("onScale", ""+mScaleFactor);
temp.invalidate();
invalidate();
return true;
}
}
}
问题:
- 如何使仅楼层 map 图像缩放?
- 保持图钉不缩放但相对移动?
- 点击图钉时获取准确的点击事件
任何建议和答案都将不胜感激!
提前致谢
卡马尔
最佳答案
在 Android View 中实现类似 HTML map 的元素:
- 在布局中支持图像作为可绘制对象或位图
- 允许在 xml 中列出区域标签
- 允许使用剪切和粘贴 HTML 区域标签到资源 xml(即,能够获取 HTML map 和图像并以最少的编辑使用它)
- 如果图像大于设备屏幕,则支持平移
- 支持双指缩放
- 支持点击区域时的回调。
- 支持将注释显示为气泡文本并在点击气泡时提供回调
查看此链接,您将获得解决方案 https://github.com/catchthecows/AndroidImageMap
关于android - 缩放和捏合 RelativeLayout,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/12431093/