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refactor(BitmapUtils.kt):minify code

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Xwite
2022-04-14 19:12:53 +08:00
parent b7d1236069
commit 236aa2bf24
1 changed files with 25 additions and 54 deletions
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79
app/src/main/java/io/legado/app/utils/BitmapUtils.kt
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@@ -27,7 +27,7 @@ object BitmapUtils {
* @return
*/
@Throws(IOException::class)
fun decodeBitmap(path: String, width: Int, height: Int): Bitmap {
fun decodeBitmap(path: String, width: Int, height: Int? = null): Bitmap {
val fis = FileInputStream(path)
return fis.use {
@@ -35,44 +35,35 @@ object BitmapUtils {
// inJustDecodeBounds如果设置为true,仅仅返回图片实际的宽和高,宽和高是赋值给opts.outWidth,opts.outHeight;
op.inJustDecodeBounds = true
BitmapFactory.decodeFileDescriptor(fis.fd, null, op)
//获取比例大小
val wRatio = ceil((op.outWidth / width).toDouble()).toInt()
val hRatio = ceil((op.outHeight / height).toDouble()).toInt()
//如果超出指定大小，则缩小相应的比例
if (wRatio > 1 && hRatio > 1) {
if (wRatio > hRatio) {
op.inSampleSize = wRatio
} else {
op.inSampleSize = hRatio
}
}
op.inSampleSize = calculateInSampleSize(op, width, height)
op.inJustDecodeBounds = false
BitmapFactory.decodeFileDescriptor(fis.fd, null, op)
}
}
@Throws(IOException::class)
fun decodeBitmap(path: String, width: Int): Bitmap {
val fis = FileInputStream(path)
return fis.use {
val op = BitmapFactory.Options()
// inJustDecodeBounds如果设置为true,仅仅返回图片实际的宽和高,宽和高是赋值给opts.outWidth,opts.outHeight;
op.inJustDecodeBounds = true
BitmapFactory.decodeFileDescriptor(fis.fd, null, op)
//获取比例大小
val wRatio = ceil((op.outWidth / width).toDouble()).toInt()
//如果超出指定大小，则缩小相应的比例
if (wRatio > 1) {
op.inSampleSize = wRatio
}
op.inJustDecodeBounds = false
BitmapFactory.decodeFileDescriptor(fis.fd, null, op)
/**
*计算 InSampleSize。缺省返回1
* @param options BitmapFactory.Options,
* @param width 想要显示的图片的宽度
* @param height 想要显示的图片的高度
* @return
*/
private fun calculateInSampleSize(
options: BitmapFactory.Options,
width: Int? = null,
height: Int? = null
): Int {
//获取比例大小
val wRatio = width?.let { ceil((options.outWidth / it).toDouble()).toInt() } ?: -1
val hRatio = height?.let { ceil((options.outHeight / it).toDouble()).toInt() } ?: -1
//如果超出指定大小，则缩小相应的比例
return when {
wRatio > 1 && hRatio > 1 -> max(wRatio, hRatio)
wRatio > 1 -> wRatio
hRatio > 1 -> hRatio
else -> 1
}
}
/** 从path中获取Bitmap图片
@@ -118,17 +109,7 @@ object BitmapUtils {
// inJustDecodeBounds如果设置为true,仅仅返回图片实际的宽和高,宽和高是赋值给opts.outWidth,opts.outHeight;
op.inJustDecodeBounds = true
BitmapFactory.decodeResource(context.resources, resId, op) //获取尺寸信息
//获取比例大小
val wRatio = ceil((op.outWidth / width).toDouble()).toInt()
val hRatio = ceil((op.outHeight / height).toDouble()).toInt()
//如果超出指定大小，则缩小相应的比例
if (wRatio > 1 && hRatio > 1) {
if (wRatio > hRatio) {
op.inSampleSize = wRatio
} else {
op.inSampleSize = hRatio
}
}
op.inSampleSize = calculateInSampleSize(op, width, height)
op.inJustDecodeBounds = false
return BitmapFactory.decodeResource(context.resources, resId, op)
}
@@ -154,17 +135,7 @@ object BitmapUtils {
// inJustDecodeBounds如果设置为true,仅仅返回图片实际的宽和高,宽和高是赋值给opts.outWidth,opts.outHeight;
op.inJustDecodeBounds = true
BitmapFactory.decodeStream(inputStream, null, op) //获取尺寸信息
//获取比例大小
val wRatio = ceil((op.outWidth / width).toDouble()).toInt()
val hRatio = ceil((op.outHeight / height).toDouble()).toInt()
//如果超出指定大小，则缩小相应的比例
if (wRatio > 1 && hRatio > 1) {
if (wRatio > hRatio) {
op.inSampleSize = wRatio
} else {
op.inSampleSize = hRatio
}
}
op.inSampleSize = calculateInSampleSize(op, width, height)
inputStream = context.assets.open(fileNameInAssets)
op.inJustDecodeBounds = false
BitmapFactory.decodeStream(inputStream, null, op)