直播系统定制，实现创建圆形图片的相关代码
import android.content.Context import android.graphics.* import android.graphics.drawable.BitmapDrawable import android.graphics.drawable.ColorDrawable import android.graphics.drawable.Drawable import android.util.AttributeSet import androidx.appcompat.widget.AppCompatImageView import androidx.core.graphics.drawable.toBitmap /** * 绘制圆形的图片 */ class MyOvalImageView(context:Context, attrs:AttributeSet) : AppCompatImageView(context, attrs) { private val mPaintBitmap: Paint = Paint(Paint.ANTI_ALIAS_FLAG)//抗锯齿 private var mRawBitmap:Bitmap? = null private var mShader:BitmapShader? = null private val mMatrix:Matrix = Matrix() private var strokeColor:Int = 0xFFFFFF private var strokeWidth:Float = 0F override fun onDraw(canvas: Canvas?) { val rawBitmap:Bitmap? = getBitMap(drawable) if(rawBitmap != null){ val viewMinSize:Int = width.coerceAtMost(height)// 取较小的值 val viewWidth:Float = viewMinSize.toFloat() val viewHeight:Float = viewMinSize.toFloat() if(mShader == null || !rawBitmap.equals(mRawBitmap)){ mRawBitmap = rawBitmap mShader = BitmapShader(mRawBitmap!!, Shader.TileMode.CLAMP, Shader.TileMode.CLAMP) } if(mShader != null){ mMatrix.setScale(viewWidth/rawBitmap.width, viewHeight/rawBitmap.height) mShader?.setLocalMatrix(mMatrix) } mPaintBitmap.shader = mShader val radius:Float = viewMinSize/2.0f if(strokeWidth != 0f){ val whitePaint:Paint = Paint(Paint.ANTI_ALIAS_FLAG) whitePaint.color = strokeColor canvas?.drawCircle(radius, radius, radius, whitePaint) canvas?.drawCircle(radius, radius, radius - strokeWidth, mPaintBitmap) }else{ canvas?.drawCircle(radius, radius, radius, mPaintBitmap) } }else{ super.onDraw(canvas) } } /** * @param drawable 要绘制的素材 */ private fun getBitMap(drawable:Drawable?):Bitmap?{ if(drawable != null){ when(drawable::class.java){ BitmapDrawable::class.java -> return drawable.toBitmap() ColorDrawable::class.java -> { val rect:Rect = drawable.bounds val width:Int = rect.right - rect.left val height:Int = rect.bottom - rect.top val drawableColor:ColorDrawable = drawable as ColorDrawable val color:Int = drawableColor.color val bitmap:Bitmap = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888) val canvas:Canvas = Canvas(bitmap) canvas.drawARGB(Color.alpha(color), Color.red(color), Color.green(color), Color.blue(color)) return bitmap } else -> return null } } return null } /** * @param strokeWidth 边框宽度 */ public fun setStrokeWidth(strokeWidth:Float){ this.strokeWidth = strokeWidth } /** * @param strokeColor 边框颜色 */ public fun setStrokeColor(strokeColor:Int){ this.strokeColor = strokeColor } }在xml中直接使用就可以了。
<com.example.iplayer.ui.tools.MyOvalImageView android:layout_width="0dp" android:layout_height="match_parent" android:layout_marginTop="12dp" android:layout_marginBottom="12dp" android:layout_weight="1" android:scaleType="fitCenter" android:src="@mipmap/header1" />以上就是直播系统定制，实现创建圆形图片的相关代码， 更多内容欢迎关注之后的文章
