Java tutorial
/* * Copyright (C) 2014 The Android Open Source Project * * 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.github.refreshloadlayout; import android.content.Context; import android.content.res.Resources; import android.graphics.Canvas; import android.graphics.Color; import android.graphics.Paint; import android.graphics.RadialGradient; import android.graphics.Shader; import android.graphics.drawable.Drawable; import android.graphics.drawable.ShapeDrawable; import android.graphics.drawable.shapes.OvalShape; import android.net.Uri; import android.support.v4.view.ViewCompat; import android.support.v7.widget.AppCompatImageView; import android.util.AttributeSet; import android.util.Log; import android.view.animation.Animation; /** * An Material Style Progress View */ public class ProgressView extends AppCompatImageView { public static final int DEFAULT_CIRCLE_BG_LIGHT = 0xFFFAFAFA; public static final int DEFAULT_CIRCLE_COLOR = 0xFFF00000; public static final int DEFAULT_TEXT_SIZE = 9; private static final int KEY_SHADOW_COLOR = 0x1E000000; private static final int FILL_SHADOW_COLOR = 0x3D000000; // PX private static final float X_OFFSET = 0f; private static final float Y_OFFSET = 1.75f; private static final float SHADOW_RADIUS = 3.5f; private static final int SHADOW_ELEVATION = 4; private static final int DEFAULT_CIRCLE_DIAMETER = 40; private static final int STROKE_WIDTH_LARGE = 3; public MaterialProgressDrawable mProgressDrawable; private Animation.AnimationListener mListener; private int mShadowRadius; private int mBackGroundColor = DEFAULT_CIRCLE_BG_LIGHT; private int mProgressColor = DEFAULT_CIRCLE_COLOR; private int mProgressStokeWidth; private int mArrowWidth; private int mArrowHeight; private int mProgress; private int mMax; private int mDiameter; private int mInnerRadius = -1; private Paint mTextPaint; private int mTextColor; private int mTextSize; private boolean mIfDrawText; private boolean mShowArrow; private ShapeDrawable mBgCircle; private boolean mCircleBackgroundEnabled; private int[] mColors = new int[] { Color.BLACK }; public ProgressView(Context context) { this(context, null); } public ProgressView(Context context, AttributeSet attributeSet) { super(context, attributeSet); init(context); } private void init(Context context) { final float density = context.getResources().getDisplayMetrics().density; mShadowRadius = (int) (density * SHADOW_RADIUS); mProgressStokeWidth = (int) (STROKE_WIDTH_LARGE * density); mArrowWidth = -1; mArrowHeight = -1; mTextSize = (int) (DEFAULT_TEXT_SIZE * density); mTextColor = Color.BLACK; mShowArrow = true; mCircleBackgroundEnabled = true; mProgress = 0; mMax = 100; mTextPaint = new Paint(); mTextPaint.setStyle(Paint.Style.FILL); mTextPaint.setColor(mTextColor); mTextPaint.setTextSize(mTextSize); mTextPaint.setAntiAlias(true); mProgressDrawable = new MaterialProgressDrawable(getContext(), this); super.setImageDrawable(mProgressDrawable); } public void setProgressBackGroundColor(int color) { this.mBackGroundColor = color; } public void setTextColor(int color) { this.mTextColor = color; } private boolean elevationSupported() { return android.os.Build.VERSION.SDK_INT >= 21; } @Override protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { super.onMeasure(widthMeasureSpec, heightMeasureSpec); if (!elevationSupported()) { setMeasuredDimension(getMeasuredWidth() + mShadowRadius * 2, getMeasuredHeight() + mShadowRadius * 2); } } public int getProgressStokeWidth() { return mProgressStokeWidth; } public void setProgressStokeWidth(int mProgressStokeWidth) { final float density = getContext().getResources().getDisplayMetrics().density; this.mProgressStokeWidth = (int) (mProgressStokeWidth * density); } @Override protected void onLayout(boolean changed, int left, int top, int right, int bottom) { super.onLayout(changed, left, top, right, bottom); final float density = getContext().getResources().getDisplayMetrics().density; mDiameter = Math.min(getMeasuredWidth(), getMeasuredHeight()); if (mDiameter <= 0) { mDiameter = (int) density * DEFAULT_CIRCLE_DIAMETER; } if (getBackground() == null && mCircleBackgroundEnabled) { final int shadowYOffset = (int) (density * Y_OFFSET); final int shadowXOffset = (int) (density * X_OFFSET); if (elevationSupported()) { mBgCircle = new ShapeDrawable(new OvalShape()); ViewCompat.setElevation(this, SHADOW_ELEVATION * density); } else { OvalShape oval = new OvalShadow(mShadowRadius, mDiameter - mShadowRadius * 2); mBgCircle = new ShapeDrawable(oval); ViewCompat.setLayerType(this, ViewCompat.LAYER_TYPE_SOFTWARE, mBgCircle.getPaint()); mBgCircle.getPaint().setShadowLayer(mShadowRadius, shadowXOffset, shadowYOffset, KEY_SHADOW_COLOR); final int padding = mShadowRadius; // set padding so the inner image sits correctly within the shadow. setPadding(padding, padding, padding, padding); } mBgCircle.getPaint().setColor(mBackGroundColor); setBackgroundDrawable(mBgCircle); } mProgressDrawable.setBackgroundColor(mBackGroundColor); mProgressDrawable.setColorSchemeColors(mColors); mProgressDrawable.setSizeParameters(mDiameter, mDiameter, mInnerRadius <= 0 ? (mDiameter - mProgressStokeWidth * 2) / 4 : mInnerRadius, mProgressStokeWidth, mArrowWidth < 0 ? mProgressStokeWidth * 4 : mArrowWidth, mArrowHeight < 0 ? mProgressStokeWidth * 2 : mArrowHeight); if (isShowArrow()) { mProgressDrawable.setArrowScale(1f); mProgressDrawable.showArrow(true); } super.setImageDrawable(null); super.setImageDrawable(mProgressDrawable); mProgressDrawable.setAlpha(255); if (getVisibility() == VISIBLE) { mProgressDrawable.setStartEndTrim(0, (float) 0.8); } } @Override protected void onDraw(Canvas canvas) { super.onDraw(canvas); if (mIfDrawText) { String text = String.format("%s%%", mProgress); int x = getWidth() / 2 - text.length() * mTextSize / 4; int y = getHeight() / 2 + mTextSize / 4; canvas.drawText(text, x, y, mTextPaint); } } @Override final public void setImageResource(int resId) { } public boolean isShowArrow() { return mShowArrow; } public void setShowArrow(boolean showArrow) { this.mShowArrow = showArrow; } @Override final public void setImageURI(Uri uri) { super.setImageURI(uri); } @Override final public void setImageDrawable(Drawable drawable) { } public void setAnimationListener(Animation.AnimationListener listener) { mListener = listener; } @Override public void onAnimationStart() { super.onAnimationStart(); if (mListener != null) { mListener.onAnimationStart(getAnimation()); } } @Override public void onAnimationEnd() { super.onAnimationEnd(); if (mListener != null) { mListener.onAnimationEnd(getAnimation()); } } /** * Set the color resources used in the progress animation from color resources. * The first color will also be the color of the bar that grows in response * to a user swipe gesture. * * @param colorResIds */ public void setColorSchemeResources(int... colorResIds) { final Resources res = getResources(); int[] colorRes = new int[colorResIds.length]; for (int i = 0; i < colorResIds.length; i++) { colorRes[i] = res.getColor(colorResIds[i]); } setColorSchemeColors(colorRes); } /** * Set the colors used in the progress animation. The first * color will also be the color of the bar that grows in response to a user * swipe gesture. * * @param colors */ public void setColorSchemeColors(int... colors) { mColors = colors; if (mProgressDrawable != null) { mProgressDrawable.setColorSchemeColors(colors); } } /** * Update the background color of the mBgCircle image view. */ public void setBackgroundColorResource(int colorRes) { if (getBackground() instanceof ShapeDrawable) { final Resources res = getResources(); ((ShapeDrawable) getBackground()).getPaint().setColor(res.getColor(colorRes)); } } public void setBackgroundColor(int color) { if (getBackground() instanceof ShapeDrawable) { ((ShapeDrawable) getBackground()).getPaint().setColor(color); } } public boolean isShowProgressText() { return mIfDrawText; } public void setShowProgressText(boolean mIfDrawText) { this.mIfDrawText = mIfDrawText; } public int getMax() { return mMax; } public void setMax(int max) { mMax = max; } public int getProgress() { return mProgress; } public void setProgress(int progress) { if (getMax() > 0) { mProgress = progress; } invalidate(); Log.i("cjj_log", "progress------->>>>" + progress); } public boolean circleBackgroundEnabled() { return mCircleBackgroundEnabled; } public void setCircleBackgroundEnabled(boolean enableCircleBackground) { this.mCircleBackgroundEnabled = enableCircleBackground; } @Override protected void onAttachedToWindow() { super.onAttachedToWindow(); if (mProgressDrawable != null) { mProgressDrawable.stop(); mProgressDrawable.setVisible(getVisibility() == VISIBLE, false); } } @Override protected void onDetachedFromWindow() { super.onDetachedFromWindow(); if (mProgressDrawable != null) { mProgressDrawable.stop(); mProgressDrawable.setVisible(false, false); } } public void setArrowScale(float scale) { mProgressDrawable.setArrowScale(scale); } /** * */ public void start() { mProgressDrawable.start(); } /** * ? */ public void setStartEndTrim(float startAngle, float endAngle) { mProgressDrawable.setStartEndTrim(startAngle, endAngle); } /** * ? */ public void stop() { mProgressDrawable.stop(); } public void setProgressRotation(float rotation) { mProgressDrawable.showArrow(true); mProgressDrawable.setProgressRotation(rotation); } private class OvalShadow extends OvalShape { private RadialGradient mRadialGradient; private int mShadowRadius; private Paint mShadowPaint; private int mCircleDiameter; public OvalShadow(int shadowRadius, int circleDiameter) { super(); mShadowPaint = new Paint(); mShadowRadius = shadowRadius; mCircleDiameter = circleDiameter; mRadialGradient = new RadialGradient(mCircleDiameter / 2, mCircleDiameter / 2, mShadowRadius, new int[] { FILL_SHADOW_COLOR, Color.TRANSPARENT }, null, Shader.TileMode.CLAMP); mShadowPaint.setShader(mRadialGradient); } @Override public void draw(Canvas canvas, Paint paint) { final int viewWidth = ProgressView.this.getWidth(); final int viewHeight = ProgressView.this.getHeight(); canvas.drawCircle(viewWidth / 2, viewHeight / 2, (mCircleDiameter / 2 + mShadowRadius), mShadowPaint); canvas.drawCircle(viewWidth / 2, viewHeight / 2, (mCircleDiameter / 2), paint); } } }