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POProgrammatically adding ABOVE to LayoutParams causes view height to be 0
 

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  1. POProgrammatically adding ABOVE to LayoutParams causes view height to be 0
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    <p>I have a custom <code>View</code>. In the constructor for the view, I create and add two subviews. However, using <code>LayoutParams.addRule()</code> is causing some problems. Rules such as <code>CENTER_HORIZONTAL</code> work, but when I try to use <code>ABOVE</code>, the subview ends up with a height of 0.</p> <p>Here is the code in my constructor:</p> <pre><code> setLayoutParams(new LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT)); mLayoutParams = new LayoutParams(width, height); mLayoutParams.leftMargin = left; mLayoutParams.topMargin = top; mImage = new ImageView(getContext()); mImage.setImageDrawable(getResources().getDrawable(R.drawable.my_image_drawable)); mImage.setScaleType(ScaleType.FIT_XY); mImage.setId(R.id.my_image_id); addView(mImage, mLayoutParams); mText = new TextView(getContext()); mText.setText(R.string.my_text); mText.setId(R.id.my_text_id); LayoutParams textParams = new LayoutParams(200, 40); // textParams.addRule(CENTER_HORIZONTAL, TRUE); //Works textParams.addRule(ABOVE, mImage.getId()); //Doesn't work addView(mText, textParams); </code></pre> <p>If I inspect the view on an emulator with the Device Monitor, I can see that the <code>layout_height</code> of the text is 40, but the top, bottom, and height parameters are all 0. <code>measuredHeight</code> appears to be the same as the screen width.</p> <ol> <li>Am I doing something wrong with adding the rules?</li> <li>Is there a better place to add the rules? Does something need to happen first?</li> <li>Any other alternatives? Making the <code>TextView</code> have a height of FILL_PARENT, gravity BOTTOM, and setting its bottom margin to the height of the image works, but I need to be able to add another view above the text, and this won't work for that.</li> </ol>
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    1. USkarl
    1. USkarl
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      1. VTUpMod
    1. COTry adding a rule for your `Image` to be `Below` your `TextView`. When things are added to a `RelativeLayout` they are added to the top-left unless otherwise specified. I think what might be happening is there is no place above your `Image` for the `TextView` to go
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      1. POProgrammatically adding ABOVE to LayoutParams causes view height to be 0
      1. UScodeMagic
    2. COAh, sorry, I missed that in my code. `mLayoutParams` has a left, top, width, and height defined. Shouldn't that be enough for it to know where to go? @codeMagic, I've updated the code.
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      1. POProgrammatically adding ABOVE to LayoutParams causes view height to be 0
      1. USkarl
    3. COAdding `ALIGN_BOTTOM` to `mImage` doesn't change anything. If I change it to `BELOW` instead, I get a circular dependency error. I want the text to be above the image, and the image has a fixed location.
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      1. POProgrammatically adding ABOVE to LayoutParams causes view height to be 0
      1. USkarl
 

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