Android处理视图圆角和色彩的工具类

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public class DrawCorner {
 
 /**
 * 默认绘制圆角函数，背景白色，半径20
 * */
 public static GradientDrawable drawCorner() {
 GradientDrawable drawable = new GradientDrawable();
 drawable.setCornerRadius(20);
 drawable.setColor(Color.WHITE);
 return drawable;
 }
 
 /**
 * 默认绘制圆角函数，背景白色
 * 参数：
 * radius：圆角半径
 * */
 public static GradientDrawable drawCorner(int radius) {
 GradientDrawable drawable = new GradientDrawable();
 drawable.setCornerRadius(radius);
 drawable.setColor(Color.WHITE);
 return drawable;
 }
 
 /**
 * 默认绘制圆角函数，背景白色
 * 参数：
 * radii：四个圆角半径，依次是左上x、左上y、右上x、右上y、右下x、右下y、左下x、左下y
 * */
 public static GradientDrawable drawCorner(float[] radii) {
 if (radii == null || radii.length != 8) {
 radii = new float[]{0, 0, 0, 0, 0, 0, 0, 0};
 }
 GradientDrawable drawable = new GradientDrawable();
 drawable.setCornerRadii(radii);
 drawable.setColor(Color.WHITE);
 return drawable;
 }
 
 /**
 * 默认绘制圆角函数
 * 参数：
 * radius：圆角半径
 * color：背景色
 * */
 public static GradientDrawable drawCorner(int radius, int color) {
 GradientDrawable drawable = new GradientDrawable();
 drawable.setCornerRadius(radius);
 drawable.setColor(color);
 return drawable;
 }
 
 /**
 * 默认绘制圆角函数
 * 参数：
 * radii：四个圆角半径，依次是左上x、左上y、右上x、右上y、右下x、右下y、左下x、左下y
 * color：背景色
 * */
 public static GradientDrawable drawCorner(float[] radii, int color) {
 if (radii == null || radii.length != 8) {
 radii = new float[]{0, 0, 0, 0, 0, 0, 0, 0};
 }
 GradientDrawable drawable = new GradientDrawable();
 drawable.setCornerRadii(radii);
 drawable.setColor(color);
 return drawable;
 }
 
 /**
 * 默认绘制圆角函数
 * 参数：
 * radius：圆角半径
 * colors：渐变背景色
 * */
 public static GradientDrawable drawCorner(int radius, int[] colors) {
 GradientDrawable drawable = new GradientDrawable();
 drawable.setCornerRadius(radius);
 drawable.setGradientType(GradientDrawable.LINEAR_GRADIENT);
 drawable.setColors(colors);
 return drawable;
 }
 
 /**
 * 默认绘制圆角函数
 * 参数：
 * radii：四个圆角半径，依次是左上x、左上y、右上x、右上y、右下x、右下y、左下x、左下y
 * colors：渐变背景色
 * */
 public static GradientDrawable drawCorner(float[] radii, int[] colors) {
 if (radii == null || radii.length != 8) {
 radii = new float[]{0, 0, 0, 0, 0, 0, 0, 0};
 }
 GradientDrawable drawable = new GradientDrawable();
 drawable.setCornerRadii(radii);
 drawable.setGradientType(GradientDrawable.LINEAR_GRADIENT);
 drawable.setColors(colors);
 return drawable;
 }
 
 /**
 * 默认绘制圆角函数
 * 参数：
 * radius：圆角半径
 * colors：渐变背景色
 * orientation：渐变类型（ 0：上到下，1：右上到左下，2：右到左，3：右下到左上，4：下到上，5：左下到右上，6：左到右，7：左上到右下 ）
 * */
 public static GradientDrawable drawCorner(int radius, int[] colors, int orientation) {
 GradientDrawable drawable = new GradientDrawable();
 drawable.setCornerRadius(radius);
 drawable.setGradientType(GradientDrawable.LINEAR_GRADIENT);
 switch (orientation) {
 case 0:
 drawable.setOrientation(GradientDrawable.Orientation.TOP_BOTTOM);
 break;
 case 1:
 drawable.setOrientation(GradientDrawable.Orientation.TR_BL);
 break;
 case 2:
 drawable.setOrientation(GradientDrawable.Orientation.RIGHT_LEFT);
 break;
 case 3:
 drawable.setOrientation(GradientDrawable.Orientation.BR_TL);
 break;
 case 4:
 drawable.setOrientation(GradientDrawable.Orientation.BOTTOM_TOP);
 break;
 case 5:
 drawable.setOrientation(GradientDrawable.Orientation.BL_TR);
 break;
 case 6:
 drawable.setOrientation(GradientDrawable.Orientation.LEFT_RIGHT);
 break;
 case 7:
 drawable.setOrientation(GradientDrawable.Orientation.TL_BR);
 break;
 }
 drawable.setColors(colors);
 return drawable;
 }
 
 /**
 * 默认绘制圆角函数
 * 参数：
 * radii：四个圆角半径，依次是左上、右上、右下、左下
 * colors：渐变背景色
 * orientation：渐变类型（ 0：上到下，1：右上到左下，2：右到左，3：右下到左上，4：下到上，5：左下到右上，6：左到右，7：左上到右下 ）
 * */
 public static GradientDrawable drawCorner(float[] radii, int[] colors, int orientation) {
 if (radii == null || radii.length != 8) {
 radii = new float[]{0, 0, 0, 0, 0, 0, 0, 0};
 }
 GradientDrawable drawable = new GradientDrawable();
 drawable.setCornerRadii(radii);
 drawable.setGradientType(GradientDrawable.LINEAR_GRADIENT);
 switch (orientation) {
 case 0:
 drawable.setOrientation(GradientDrawable.Orientation.TOP_BOTTOM);
 break;
 case 1:
 drawable.setOrientation(GradientDrawable.Orientation.TR_BL);
 break;
 case 2:
 drawable.setOrientation(GradientDrawable.Orientation.RIGHT_LEFT);
 break;
 case 3:
 drawable.setOrientation(GradientDrawable.Orientation.BR_TL);
 break;
 case 4:
 drawable.setOrientation(GradientDrawable.Orientation.BOTTOM_TOP);
 break;
 case 5:
 drawable.setOrientation(GradientDrawable.Orientation.BL_TR);
 break;
 case 6:
 drawable.setOrientation(GradientDrawable.Orientation.LEFT_RIGHT);
 break;
 case 7:
 drawable.setOrientation(GradientDrawable.Orientation.TL_BR);
 break;
 }
 drawable.setColors(colors);
 return drawable;
 }
 
}

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View.setBackground(DrawCorner.drawCorner);

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TextView textView = findViewById(R.id.test);
textView.setBackground(DrawCorner.drawCorner());