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Today, the editor will share with you how Android TextView removes the relevant knowledge points of adaptive default fontpadding. The content is detailed and the logic is clear. I believe most people still know too much about this knowledge, so share this article for your reference. I hope you can get something after reading this article. Let's take a look at it.

The implementation method of removing the adaptive default fontpadding from Android TextView

Recently, when I used textview in a project, I found that after using the property setting of Android:layout_height= "wrap_content", textview will have a default padding, which is fontpadding. This will cause the gap between textview and other view to be larger than your own settings. So how do we remove this gap?

First, try to set up includefontpadding=false first. If you can't achieve your goal, you can follow the second method.

Second, to implement a custom TextView, simply inherit from TextView and override the onDraw method.

FontMetricsInt fontMetricsInt; @ Override protected void onDraw (Canvas canvas) {if (adjustTopForAscent) {/ / set remove spacing, true is remove if (fontMetricsInt = = null) {fontMetricsInt = new FontMetricsInt (); getPaint () .getFontMetricsInt (fontMetricsInt);} canvas.translate (0, fontMetricsInt.top-fontMetricsInt.ascent);} super.onDraw (canvas);}

The second method generally achieves the goal, and if it still can't, it can only be achieved by using a marginTop equal to a negative value, but this method is not recommended.

These are all the contents of the article "how to get rid of the adaptive default fontpadding in Android TextView". Thank you for reading! I believe you will gain a lot after reading this article. The editor will update different knowledge for you every day. If you want to learn more knowledge, please pay attention to the industry information channel.

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