It seems I'm not out of the woods just yet. I seem to be having another
strange problem with gravity - vertically this time. LEFT, RIGHT & CENTER
(aligning a normal and wider button in a vertical layout so that they are
both right-aligned) seem to be no problem.
Given the following code sample:
---
LinearLayout rootContainer = new LinearLayout(this);
rootContainer.setOrientation(LinearLayout.VERTICAL);
LinearLayout.LayoutParams constraints = null ;
int normalGravity = Gravity.TOP ;
int tallerGravity = Gravity.BOTTOM ;
LinearLayout nestedContainer = new LinearLayout(this);
nestedContainer.setOrientation(LinearLayout.HORIZONTAL);
nestedContainer.setPadding(0, 0, 0, 0);
nestedContainer.setBackgroundColor(Color.YELLOW); // Confirm both
buttons in the container.
Button normalButton = new Button(this);
normalButton.setText("Normal");
constraints = new LinearLayout.LayoutParams(LayoutParams.WRAP_CONTENT,
LayoutParams.WRAP_CONTENT, 0.0f);
constraints.gravity = normalGravity ;
nestedContainer.addView(normalButton, constraints);
Button tallerButton = new Button(this);
tallerButton.setText("Much Taller");
constraints = new LinearLayout.LayoutParams(LayoutParams.WRAP_CONTENT,
80, // Deliberately taller than required.
0.0f);
constraints.gravity = tallerGravity ;
nestedContainer.addView(tallerButton, constraints);
constraints = new LinearLayout.LayoutParams(LayoutParams.WRAP_CONTENT,
100, // Deliberately rather tall.
0.0f);
rootContainer.addView(nestedContainer, constraints);
setContentView(rootContainer);
---
If you debug this, the normal button aligns to the top and the taller button
to the bottom, as expected. (There's a padding issue - it adds padding
around the taller button when it should not, but I can live with that as
it's small.)
If you try changing both normalGravity and tallerGravity to both TOP or both
BOTTOM, what happens is that the buttons seem to line up with each other
centrally, and then the *row* is aligned to top or bottom, instead of each
control aligning individually. This, to my mind, breaks the contract of
having individual gravity for each control via its LayoutParams.
Thoughts?
I swear I'm not trying to break this stuff!
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