我正在申请处理家庭自动装置 - 灯光，大门，加热等。我已经制作了自定义视图，它可以显示地板的地图，可以缩放和平移，带有图标点击时改变的灯泡。我尝试制作上下文菜单，这将允许我设置例如室温，但是当我长按视图时 - 没有任何反应。我尝试了很多方法，到处寻找，最后我决定请你们帮忙。
以下是代码：
public class ZoomView extends View {
private float scaleFactor = 1f;
private ScaleGestureDetector detector;
private static int NONE = 0;
private static int DRAG = 1;
private static int ZOOM = 2;
private int mode;
public boolean dragged = false;
private float startX = 0f;
private float startY = 0f;
private float translateX = 0f;
private float translateY = 0f;
private float previousTranslateX = 0f;
private float previousTranslateY = 0f;
Resources res = getResources();
Bitmap bmp = BitmapFactory.decodeResource(getResources(), R.drawable.floor);
DisplayMetrics displayMetrics = this.getResources().getDisplayMetrics();
float density = getResources().getDisplayMetrics().density;
private float MIN_ZOOM = 0.1f;
private float MAX_ZOOM = 5f;
Bitmap lb1a = BitmapFactory.decodeResource(res, R.drawable.lb1a);
RectF lb1Rect;
RectF lb1draw = new RectF((64*density), (116*density), (92*density) , (146*density));
boolean lb1on = false;
Bitmap lb1b = BitmapFactory.decodeResource(res, R.drawable.lb1b);
public ZoomView(Context context, AttributeSet attributeSet) {
super(context, attributeSet);
detector = new ScaleGestureDetector(getContext(), new ScaleListener());
this.setLongClickable(true);
this.setOnLongClickListener(vLong);
}
@Override
public boolean onTouchEvent(MotionEvent event) {
final int action = event.getAction();
switch (action & MotionEvent.ACTION_MASK) {
case MotionEvent.ACTION_DOWN:
mode = DRAG;
startX = event.getX() - previousTranslateX;
startY = event.getY() - previousTranslateY;
break;
case MotionEvent.ACTION_MOVE:
translateX = event.getX() - startX;
translateY = event.getY() - startY;
double distance = Math.sqrt(Math.pow(event.getX() - (startX + previousTranslateX), 2) + Math.pow(event.getY() - (startY + previousTranslateY), 2));
if (distance > 10) {
dragged = true;
}
break;
case MotionEvent.ACTION_POINTER_DOWN:
mode = ZOOM;
break;
case MotionEvent.ACTION_UP:
mode = NONE;
previousTranslateX = translateX;
previousTranslateY = translateY;
if (!dragged) {
executeClick(startX, startY);
}
dragged = false;
break;
case MotionEvent.ACTION_POINTER_UP:
mode = DRAG;
previousTranslateX = translateX;
previousTranslateY = translateY;
break;
}
detector.onTouchEvent(event);
if ((mode == DRAG && dragged) || mode == ZOOM) {
invalidate();
}
return true;
}
Paint paint = new Paint();
Paint black = new Paint();
@Override
public void onDraw(Canvas canvas) {
super.onDraw(canvas);
canvas.save();
canvas.drawPaint(paint);
black.setColor(Color.BLACK);
black.setStyle(Paint.Style.FILL);
paint.setColor(Color.BLACK);
paint.setTextSize(30);
canvas.scale(this.scaleFactor, this.scaleFactor);
canvas.translate(translateX/scaleFactor, translateY/scaleFactor);
lb1Rect = new RectF((64*density)*scaleFactor, (116*density)*scaleFactor, (92*density)*scaleFactor , (146*density)*scaleFactor);
canvas.drawBitmap(bmp, 0, 0, null);
if (lb1on) {
canvas.drawBitmap(lb1b, null ,lb1draw , null);
}
else {
canvas.drawBitmap(lb1a, null ,lb1draw , null);
}
canvas.drawText("translate X:" + Float.toString(translateX), 0, 40, paint);
canvas.drawText("translate Y:"+ Float.toString(translateY), 0, 90, paint);
canvas.drawText("scale factor:"+ Float.toString(scaleFactor), 0, 140, paint);
canvas.restore();
}
private OnLongClickListener vLong = new OnLongClickListener() {
@Override
public boolean onLongClick(View view) {
showContextMenu();
lb1on=!lb1on;
return true;
}
};
private class ScaleListener extends ScaleGestureDetector.SimpleOnScaleGestureListener {
@Override
public boolean onScale(ScaleGestureDetector detector) {
scaleFactor *= detector.getScaleFactor();
scaleFactor = Math.max(MIN_ZOOM, Math.min(scaleFactor, MAX_ZOOM));
return true;
}
}
public void executeClick (float x, float y) {
if (lb1Rect.contains(x, y)) {
lb1on = !lb1on;
//new HttpAsyncTask().execute("http://10.30.60.190/arduino");
invalidate();
}
}
}
看起来像
private OnLongClickListener vLong = new OnLongClickListener() {
@Override
public boolean onLongClick(View view) {
showContextMenu();
lb1on = !lb1on;
return true;
}
};
方法不起作用，我把lb1on =！lb1on;在那里检查灯泡图标是否会改变但没有任何反应。 这是我的活动，我在其中提出了观点：
公共类缩放扩展活动{
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_zoom);
ZoomView zoom = (ZoomView) findViewById(R.id.zoomView);
registerForContextMenu(zoom);
}
@Override
public void onCreateContextMenu(ContextMenu menu, View v, ContextMenu.ContextMenuInfo menuInfo) {
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.zoom_context, menu);
super.onCreateContextMenu(menu, v, menuInfo);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.zoom, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
}
有可能吗？或者我可以用另一种方式创建一个这样的图形界面，可以看到整个楼层，可以放大和平移，还可以放置按钮？