本文实例为大家分享了Android实现圆角图片的具体代码，供大家参考，具体内容如下

效果图：

快速开始

activity_main.xml文件：

<?xml version="1.0" encoding="utf-8"?><android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" tools:context=".MainActivity"> <ImageView android:id="@+id/iv_img" android:layout_width="300dp" android:layout_height="200dp" android:layout_marginTop="30dp" android:src="@mipmap/image_bg" app:layout_constraintRight_toRightOf="parent" app:layout_constraintLeft_toLeftOf="parent" app:layout_constraintTop_toTopOf="parent"/> <ImageView android:id="@+id/iv_rect_img" android:layout_width="300dp" android:layout_height="200dp" android:layout_marginTop="30dp" app:layout_constraintRight_toRightOf="parent" app:layout_constraintLeft_toLeftOf="parent" app:layout_constraintTop_toBottomOf="@id/iv_img"/> <ImageView android:id="@+id/iv_circle_img" android:layout_width="200dp" android:layout_height="200dp" android:layout_marginTop="30dp" app:layout_constraintLeft_toLeftOf="parent" app:layout_constraintRight_toRightOf="parent" app:layout_constraintTop_toBottomOf="@id/iv_rect_img"/></android.support.constraint.ConstraintLayout>

MainActivity.class文件：

public class MainActivity extends AppCompatActivity { private ImageView ivRectImg, ivCircleImg; private Bitmap bitmap; private int width; private int height; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); ivRectImg = findViewById(R.id.iv_rect_img); ivCircleImg = findViewById(R.id.iv_circle_img); bitmap = BitmapFactory.decodeResource(getResources(), R.mipmap.image_bg); width = bitmap.getWidth(); height = bitmap.getHeight(); rectRoundBitmap(); circleBitmap(); } // 圆角矩形 private void rectRoundBitmap() { RoundedBitmapDrawable bitmapDrawable = RoundedBitmapDrawableFactory.create(getResources(), bitmap); bitmapDrawable.setAntiAlias(true); bitmapDrawable.setCornerRadius(50); ivRectImg.setImageDrawable(bitmapDrawable); } // 把bitmap图片进行剪切成正方形， 然后再设置圆角半径为正方形边长的一半即可 private void circleBitmap() { Bitmap circle = null; int min = Math.min(width, height); int max = Math.max(width, height); if (width == height) { circle = Bitmap.createBitmap(bitmap, 0, 0, width, height); } else { // 居中裁剪 if (width > height) { circle = Bitmap.createBitmap(bitmap, (max - min) / 2, 0, min, min); } else { circle = Bitmap.createBitmap(bitmap, 0, (max - min) / 2, min, min); } } RoundedBitmapDrawable bitmapDrawable = RoundedBitmapDrawableFactory.create(getResources(), circle); bitmapDrawable.setCornerRadius(min / 2); bitmapDrawable.setAntiAlias(true); ivCircleImg.setImageDrawable(bitmapDrawable); }}

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。