Android 快速将一个Bitmap变成圆形或圆角矩形 kotlin
16lz
2021-01-23
Android 快速将一个Bitmap变成圆形或圆角矩形 kotlin
- Bitmap转圆形Drawable
- Bitmap转圆角Drawable
- 完事
Bitmap转圆形Drawable
新建文件CircleImageDrawable
class CircleImageDrawable(mBitmap: Bitmap) : Drawable() { private val mPaint: Paint private val mWidth: Int init { val bitmapShader = BitmapShader( mBitmap, TileMode.CLAMP, TileMode.CLAMP ) mPaint = Paint() mPaint.isAntiAlias = true mPaint.shader = bitmapShader mWidth = mBitmap.width.coerceAtMost(mBitmap.height) } override fun draw(canvas: Canvas) { canvas.drawCircle(mWidth / 2.toFloat(), mWidth / 2.toFloat(), mWidth / 2.toFloat(), mPaint) } override fun getIntrinsicWidth(): Int { return mWidth } override fun getIntrinsicHeight(): Int { return mWidth } override fun setAlpha(alpha: Int) { mPaint.alpha = alpha } override fun setColorFilter(cf: ColorFilter?) { mPaint.colorFilter = cf } override fun getOpacity(): Int { return PixelFormat.TRANSLUCENT }}使用：
imgUser.setImageDrawable(CircleImageDrawable(bitmap))Bitmap转圆角Drawable
新建文件RoundImageDrawable
class RoundImageDrawable(mBitmap: Bitmap, radius: Float) : Drawable() { private val mPaint: Paint private val mWidth: Int private val mRadius: Float init { val bitmapShader = BitmapShader( mBitmap, Shader.TileMode.CLAMP, Shader.TileMode.CLAMP ) mPaint = Paint() mPaint.isAntiAlias = true mPaint.shader = bitmapShader mWidth = mBitmap.width.coerceAtMost(mBitmap.height) mRadius = radius } override fun draw(canvas: Canvas) { canvas.drawRoundRect(0f, 0f, mWidth.toFloat(), mWidth.toFloat(), mRadius, mRadius, mPaint) } override fun getIntrinsicWidth(): Int { return mWidth } override fun getIntrinsicHeight(): Int { return mWidth } override fun setAlpha(alpha: Int) { mPaint.alpha = alpha } override fun setColorFilter(cf: ColorFilter?) { mPaint.colorFilter = cf } override fun getOpacity(): Int { return PixelFormat.TRANSLUCENT }}使用：
imgUser.setImageDrawable(RoundImageDrawable(bitmap, 12f))完事
更多相关文章
- android 圆形头像—— android开源系列：CircleImageView自定义圆
- Android实现文件上传功能（接收端用strust2）
- android 获取文件的扩展名和去掉文件的扩展名
- android平台上的文件下载,文件和文件的操作
- Android APK文件安装过程小结
- Android 文件操作
- android从资源文件中读取文件流显示
- android 快速移动sdCard的文件夹
- Android Studio module里面放switch语句报错 R文件找不到