Java tutorial
/* * Copyright (C) 2015 Vincent Mi * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package com.lamcreations.scaffold.common.views; import android.content.Context; import android.content.res.ColorStateList; import android.content.res.TypedArray; import android.graphics.Bitmap; import android.graphics.ColorFilter; import android.graphics.Shader; import android.graphics.drawable.Drawable; import android.graphics.drawable.LayerDrawable; import android.net.Uri; import android.support.annotation.ColorInt; import android.support.annotation.DimenRes; import android.support.annotation.DrawableRes; import android.support.annotation.IntDef; import android.support.v4.content.ContextCompat; import android.util.AttributeSet; import android.util.Log; import android.widget.ImageView; import com.lamcreations.scaffold.R; import com.lamcreations.scaffold.common.graphics.drawable.RoundedDrawable; import java.lang.annotation.Retention; import java.lang.annotation.RetentionPolicy; @SuppressWarnings("UnusedDeclaration") public class RoundedImageView extends ImageView { @IntDef({ Corner.TOP_LEFT, Corner.TOP_RIGHT, Corner.BOTTOM_LEFT, Corner.BOTTOM_RIGHT }) @Retention(RetentionPolicy.SOURCE) public @interface Corner { int TOP_LEFT = 0; int TOP_RIGHT = 1; int BOTTOM_RIGHT = 2; int BOTTOM_LEFT = 3; } // Constants for tile mode attributes private static final int TILE_MODE_UNDEFINED = -2; private static final int TILE_MODE_CLAMP = 0; private static final int TILE_MODE_REPEAT = 1; private static final int TILE_MODE_MIRROR = 2; public static final String TAG = "RoundedImageView"; public static final float DEFAULT_RADIUS = 0f; public static final float DEFAULT_BORDER_WIDTH = 0f; public static final Shader.TileMode DEFAULT_TILE_MODE = Shader.TileMode.CLAMP; private static final ScaleType[] SCALE_TYPES = { ScaleType.MATRIX, ScaleType.FIT_XY, ScaleType.FIT_START, ScaleType.FIT_CENTER, ScaleType.FIT_END, ScaleType.CENTER, ScaleType.CENTER_CROP, ScaleType.CENTER_INSIDE }; private final float[] mCornerRadii = new float[] { DEFAULT_RADIUS, DEFAULT_RADIUS, DEFAULT_RADIUS, DEFAULT_RADIUS }; private Drawable mBackgroundDrawable; private ColorStateList mBorderColor = ColorStateList.valueOf(RoundedDrawable.DEFAULT_BORDER_COLOR); private float mBorderWidth = DEFAULT_BORDER_WIDTH; private ColorFilter mColorFilter = null; private boolean mColorMod = false; private Drawable mDrawable; private boolean mHasColorFilter = false; private boolean mIsOval = false; private boolean mMutateBackground = false; private int mResource; private ScaleType mScaleType = ScaleType.FIT_CENTER; private Shader.TileMode mTileModeX = DEFAULT_TILE_MODE; private Shader.TileMode mTileModeY = DEFAULT_TILE_MODE; public RoundedImageView(Context context) { super(context); } public RoundedImageView(Context context, AttributeSet attrs) { this(context, attrs, 0); } public RoundedImageView(Context context, AttributeSet attrs, int defStyle) { super(context, attrs, defStyle); TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.RoundedImageView, defStyle, 0); int index = a.getInt(R.styleable.RoundedImageView_android_scaleType, -1); if (index >= 0) { setScaleType(SCALE_TYPES[index]); } else { // default scaletype to FIT_CENTER setScaleType(ScaleType.FIT_CENTER); } float cornerRadiusOverride = a.getDimensionPixelSize(R.styleable.RoundedImageView_riv_corner_radius, -1); mCornerRadii[Corner.TOP_LEFT] = a .getDimensionPixelSize(R.styleable.RoundedImageView_riv_corner_radius_top_left, -1); mCornerRadii[Corner.TOP_RIGHT] = a .getDimensionPixelSize(R.styleable.RoundedImageView_riv_corner_radius_top_right, -1); mCornerRadii[Corner.BOTTOM_RIGHT] = a .getDimensionPixelSize(R.styleable.RoundedImageView_riv_corner_radius_bottom_right, -1); mCornerRadii[Corner.BOTTOM_LEFT] = a .getDimensionPixelSize(R.styleable.RoundedImageView_riv_corner_radius_bottom_left, -1); boolean any = false; for (int i = 0, len = mCornerRadii.length; i < len; i++) { if (mCornerRadii[i] < 0) { mCornerRadii[i] = 0f; } else { any = true; } } if (!any) { if (cornerRadiusOverride < 0) { cornerRadiusOverride = DEFAULT_RADIUS; } for (int i = 0, len = mCornerRadii.length; i < len; i++) { mCornerRadii[i] = cornerRadiusOverride; } } mBorderWidth = a.getDimensionPixelSize(R.styleable.RoundedImageView_riv_border_width, -1); if (mBorderWidth < 0) { mBorderWidth = DEFAULT_BORDER_WIDTH; } mBorderColor = a.getColorStateList(R.styleable.RoundedImageView_riv_border_color); if (mBorderColor == null) { mBorderColor = ColorStateList.valueOf(RoundedDrawable.DEFAULT_BORDER_COLOR); } mMutateBackground = a.getBoolean(R.styleable.RoundedImageView_riv_mutate_background, false); mIsOval = a.getBoolean(R.styleable.RoundedImageView_riv_oval, false); final int tileMode = a.getInt(R.styleable.RoundedImageView_riv_tile_mode, TILE_MODE_UNDEFINED); if (tileMode != TILE_MODE_UNDEFINED) { setTileModeX(parseTileMode(tileMode)); setTileModeY(parseTileMode(tileMode)); } final int tileModeX = a.getInt(R.styleable.RoundedImageView_riv_tile_mode_x, TILE_MODE_UNDEFINED); if (tileModeX != TILE_MODE_UNDEFINED) { setTileModeX(parseTileMode(tileModeX)); } final int tileModeY = a.getInt(R.styleable.RoundedImageView_riv_tile_mode_y, TILE_MODE_UNDEFINED); if (tileModeY != TILE_MODE_UNDEFINED) { setTileModeY(parseTileMode(tileModeY)); } updateDrawableAttrs(); updateBackgroundDrawableAttrs(true); a.recycle(); } private static Shader.TileMode parseTileMode(int tileMode) { switch (tileMode) { case TILE_MODE_CLAMP: return Shader.TileMode.CLAMP; case TILE_MODE_REPEAT: return Shader.TileMode.REPEAT; case TILE_MODE_MIRROR: return Shader.TileMode.MIRROR; default: return null; } } @Override protected void drawableStateChanged() { super.drawableStateChanged(); invalidate(); } @Override public ScaleType getScaleType() { return mScaleType; } @Override public void setScaleType(ScaleType scaleType) { assert scaleType != null; if (mScaleType != scaleType) { mScaleType = scaleType; switch (scaleType) { case CENTER: case CENTER_CROP: case CENTER_INSIDE: case FIT_CENTER: case FIT_START: case FIT_END: case FIT_XY: super.setScaleType(ScaleType.FIT_XY); break; default: super.setScaleType(scaleType); break; } updateDrawableAttrs(); updateBackgroundDrawableAttrs(false); invalidate(); } } @Override public void setImageDrawable(Drawable drawable) { mResource = 0; mDrawable = RoundedDrawable.fromDrawable(drawable); updateDrawableAttrs(); super.setImageDrawable(mDrawable); } @Override public void setImageBitmap(Bitmap bm) { mResource = 0; mDrawable = RoundedDrawable.fromBitmap(bm); updateDrawableAttrs(); super.setImageDrawable(mDrawable); } @Override public void setImageResource(@DrawableRes int resId) { if (mResource != resId) { mResource = resId; mDrawable = resolveResource(); updateDrawableAttrs(); super.setImageDrawable(mDrawable); } } @Override public void setImageURI(Uri uri) { super.setImageURI(uri); setImageDrawable(getDrawable()); } private Drawable resolveResource() { Context context = getContext(); if (context == null) { return null; } Drawable d = null; if (mResource != 0) { try { d = ContextCompat.getDrawable(context, mResource); } catch (Exception e) { Log.w(TAG, "Unable to find resource: " + mResource, e); // Don't try again. mResource = 0; } } return RoundedDrawable.fromDrawable(d); } @Override public void setBackground(Drawable background) { //noinspection deprecation setBackgroundDrawable(background); } private void updateDrawableAttrs() { updateAttrs(mDrawable); } private void updateBackgroundDrawableAttrs(boolean convert) { if (mMutateBackground) { if (convert) { mBackgroundDrawable = RoundedDrawable.fromDrawable(mBackgroundDrawable); } updateAttrs(mBackgroundDrawable); } } @Override public void setColorFilter(ColorFilter cf) { if (mColorFilter != cf) { mColorFilter = cf; mHasColorFilter = true; mColorMod = true; applyColorMod(); invalidate(); } } private void applyColorMod() { // Only mutate and apply when modifications have occurred. This should // not reset the mColorMod flag, since these filters need to be // re-applied if the Drawable is changed. if (mDrawable != null && mColorMod) { mDrawable = mDrawable.mutate(); if (mHasColorFilter) { mDrawable.setColorFilter(mColorFilter); } } } private void updateAttrs(Drawable drawable) { if (drawable == null) { return; } if (drawable instanceof RoundedDrawable) { ((RoundedDrawable) drawable).setScaleType(mScaleType).setBorderWidth(mBorderWidth) .setBorderColor(mBorderColor).setOval(mIsOval).setTileModeX(mTileModeX) .setTileModeY(mTileModeY); if (mCornerRadii != null) { ((RoundedDrawable) drawable).setCornerRadius(mCornerRadii[Corner.TOP_LEFT], mCornerRadii[Corner.TOP_RIGHT], mCornerRadii[Corner.BOTTOM_RIGHT], mCornerRadii[Corner.BOTTOM_LEFT]); } applyColorMod(); } else if (drawable instanceof LayerDrawable) { // loop through layers to and set drawable attrs LayerDrawable ld = ((LayerDrawable) drawable); for (int i = 0, layers = ld.getNumberOfLayers(); i < layers; i++) { updateAttrs(ld.getDrawable(i)); } } } @Override @Deprecated public void setBackgroundDrawable(Drawable background) { mBackgroundDrawable = background; updateBackgroundDrawableAttrs(true); super.setBackgroundDrawable(mBackgroundDrawable); } /** * @return the largest corner radius. */ public float getCornerRadius() { return getMaxCornerRadius(); } /** * @return the largest corner radius. */ public float getMaxCornerRadius() { float maxRadius = 0; for (float r : mCornerRadii) { maxRadius = Math.max(r, maxRadius); } return maxRadius; } /** * Get the corner radius of a specified corner. * * @param corner the corner. * @return the radius. */ public float getCornerRadius(@Corner int corner) { return mCornerRadii[corner]; } /** * Set all the corner radii from a dimension resource id. * * @param resId dimension resource id of radii. */ public void setCornerRadiusDimen(@DimenRes int resId) { float radius = getResources().getDimension(resId); setCornerRadius(radius, radius, radius, radius); } /** * Set the corner radius of a specific corner from a dimension resource id. * * @param corner the corner to set. * @param resId the dimension resource id of the corner radius. */ public void setCornerRadiusDimen(@Corner int corner, @DimenRes int resId) { setCornerRadius(corner, getResources().getDimensionPixelSize(resId)); } /** * Set the corner radii of all corners in px. * * @param radius the radius to set. */ public void setCornerRadius(float radius) { setCornerRadius(radius, radius, radius, radius); } /** * Set the corner radius of a specific corner in px. * * @param corner the corner to set. * @param radius the corner radius to set in px. */ public void setCornerRadius(@Corner int corner, float radius) { if (mCornerRadii[corner] == radius) { return; } mCornerRadii[corner] = radius; updateDrawableAttrs(); updateBackgroundDrawableAttrs(false); invalidate(); } /** * Set the corner radii of each corner individually. Currently only one unique nonzero value is * supported. * * @param topLeft radius of the top left corner in px. * @param topRight radius of the top right corner in px. * @param bottomRight radius of the bottom right corner in px. * @param bottomLeft radius of the bottom left corner in px. */ public void setCornerRadius(float topLeft, float topRight, float bottomLeft, float bottomRight) { if (mCornerRadii[Corner.TOP_LEFT] == topLeft && mCornerRadii[Corner.TOP_RIGHT] == topRight && mCornerRadii[Corner.BOTTOM_RIGHT] == bottomRight && mCornerRadii[Corner.BOTTOM_LEFT] == bottomLeft) { return; } mCornerRadii[Corner.TOP_LEFT] = topLeft; mCornerRadii[Corner.TOP_RIGHT] = topRight; mCornerRadii[Corner.BOTTOM_LEFT] = bottomLeft; mCornerRadii[Corner.BOTTOM_RIGHT] = bottomRight; updateDrawableAttrs(); updateBackgroundDrawableAttrs(false); invalidate(); } public float getBorderWidth() { return mBorderWidth; } public void setBorderWidth(@DimenRes int resId) { setBorderWidth(getResources().getDimension(resId)); } public void setBorderWidth(float width) { if (mBorderWidth == width) { return; } mBorderWidth = width; updateDrawableAttrs(); updateBackgroundDrawableAttrs(false); invalidate(); } @ColorInt public int getBorderColor() { return mBorderColor.getDefaultColor(); } public void setBorderColor(@ColorInt int color) { setBorderColor(ColorStateList.valueOf(color)); } public ColorStateList getBorderColors() { return mBorderColor; } public void setBorderColor(ColorStateList colors) { if (mBorderColor.equals(colors)) { return; } mBorderColor = (colors != null) ? colors : ColorStateList.valueOf(RoundedDrawable.DEFAULT_BORDER_COLOR); updateDrawableAttrs(); updateBackgroundDrawableAttrs(false); if (mBorderWidth > 0) { invalidate(); } } public boolean isOval() { return mIsOval; } public void setOval(boolean oval) { mIsOval = oval; updateDrawableAttrs(); updateBackgroundDrawableAttrs(false); invalidate(); } public Shader.TileMode getTileModeX() { return mTileModeX; } public void setTileModeX(Shader.TileMode tileModeX) { if (this.mTileModeX == tileModeX) { return; } this.mTileModeX = tileModeX; updateDrawableAttrs(); updateBackgroundDrawableAttrs(false); invalidate(); } public Shader.TileMode getTileModeY() { return mTileModeY; } public void setTileModeY(Shader.TileMode tileModeY) { if (this.mTileModeY == tileModeY) { return; } this.mTileModeY = tileModeY; updateDrawableAttrs(); updateBackgroundDrawableAttrs(false); invalidate(); } public boolean mutatesBackground() { return mMutateBackground; } public void mutateBackground(boolean mutate) { if (mMutateBackground == mutate) { return; } mMutateBackground = mutate; updateBackgroundDrawableAttrs(true); invalidate(); } }