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ScrollView extended to use a max height together with wrap_content
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<?xml version="1.0" encoding="utf-8"?> | |
<resources> | |
<declare-styleable name="ScrollViewWithMaxHeight"> | |
<attr name="android:maxHeight" /> | |
</declare-styleable> | |
</resources> |
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import android.content.Context | |
import android.util.AttributeSet | |
import android.widget.ScrollView | |
import timber.log.Timber | |
class ScrollViewWithMaxHeight @JvmOverloads constructor( | |
context: Context, | |
attrs: AttributeSet? = null, | |
defStyleAttr: Int = 0 | |
) : ScrollView(context, attrs, defStyleAttr) { | |
companion object { | |
var WITHOUT_MAX_HEIGHT_VALUE = -1 | |
} | |
private var maxHeight = WITHOUT_MAX_HEIGHT_VALUE | |
init { | |
val a = context.obtainStyledAttributes( | |
attrs, R.styleable.ScrollViewWithMaxHeight, | |
defStyleAttr, 0 | |
) | |
try { | |
maxHeight = a.getDimension( | |
R.styleable.ScrollViewWithMaxHeight_android_maxHeight, | |
WITHOUT_MAX_HEIGHT_VALUE.toFloat() | |
).toInt() | |
} finally { | |
a.recycle() | |
} | |
} | |
override fun onMeasure(widthMeasureSpec: Int, heightMeasureSpec: Int) { | |
var heightMeasure = heightMeasureSpec | |
try { | |
var heightSize = MeasureSpec.getSize(heightMeasureSpec) | |
if (maxHeight != WITHOUT_MAX_HEIGHT_VALUE) { | |
heightSize = maxHeight | |
heightMeasure = MeasureSpec.makeMeasureSpec(heightSize, MeasureSpec.AT_MOST) | |
} else { | |
heightMeasure = MeasureSpec.makeMeasureSpec(heightSize, MeasureSpec.UNSPECIFIED) | |
} | |
layoutParams.height = heightSize | |
} catch (e: Exception) { | |
Timber.e(e, "Error forcing height") | |
} finally { | |
super.onMeasure(widthMeasureSpec, heightMeasure) | |
} | |
} | |
fun setMaxHeight(maxHeight: Int) { | |
this.maxHeight = maxHeight | |
} | |
} |
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