Incorrect Coordinates From getLocationOnScreen/getLocationInWindow

问题

A call to getLocationOnScreen() or getLocationInWindow() both give me a top/Y coordinate that is about ~30px (status/notifications bar's height) too far down. The left/X coordinate is dead on.

As I hinted above, I believe the difference is because of the status/notification bar... I could be wrong. I think I can solve this if I can determine the size of the notification bar but, I'm having trouble doing just that.

Any help would be greatly appreciated.

回答1:

I ended up solving this issue by determining the height of the status/notification bar like so:

View globalView = ...; // the main view of my activity/application

DisplayMetrics dm = new DisplayMetrics();
this.getWindowManager().getDefaultDisplay().getMetrics(dm);
int topOffset = dm.heightPixels - globalView.getMeasuredHeight();

View tempView = ...; // the view you'd like to locate
int[] loc = new int[2]; 
tempView.getLocationOnScreen(loc);

final int y = loc[1] - topOffset;

回答2:

Here is how I like to get the status bar height, and adjust the offset:

final int[] location = new int[2];
anchor.getLocationInWindow(location); // Includes offset from status bar, *dumb*
Rect anchorRect = new Rect(location[0], location[1],
        location[0] + anchor.getWidth(), location[1] + anchor.getHeight());

anchor.getRootView().findViewById(android.R.id.content).getLocationInWindow(location);
int windowTopOffset = location[1];
anchorRect.offset(0, -windowTopOffset);

回答3:

I am having the same problem, try using

offset = myView.GetOffsetY();

and adjust your Y coord by that value, e.g.

coordY -= offset;

The class which offers the ``-method:

class MyView extends View {

  public int GetOffsetY() {
    int mOffset[] = new int[2];
    getLocationOnScreen( mOffset );
    return mOffset[1]; 
  }

}

回答4:

This answer does not include how to get the status bar height, but it does explain the behavior of getLocationOnScreen() and getLocationInWindow() returning the same value.

In the case of a normal activity (not a dialog) you should expect these two methods to return the same value. A Window lays out underneath (as in z-order not y coordinates) the status bar, so these methods cannot be used to determine the height of the status bar.

https://stackoverflow.com/a/20154562/777165

来源：https://stackoverflow.com/questions/2638342/incorrect-coordinates-from-getlocationonscreen-getlocationinwindow

标签

android

android-widget