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.zzmstring.viewset.View.LoadingProgressBar; import android.content.Context; import android.content.res.Resources; import android.content.res.TypedArray; 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.util.AttributeSet; import android.view.animation.Animation; import android.widget.ImageView; import com.zzmstring.viewset.R; /** * Private class created to work around issues with AnimationListeners being * called before the animation is actually complete and support shadows on older * platforms. * */ public class CircleProgressBar extends ImageView { 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_BG_LIGHT = 0xFFFAFAFA; private static final int DEFAULT_CIRCLE_DIAMETER = 56; private static final int STROKE_WIDTH_LARGE = 3; private static final int ARROW_WIDTH_LARGE = 12; private static final int ARROW_HEIGHT_LARGE = 6; public static final int DEFAULT_TEXT_SIZE = 9; private Animation.AnimationListener mListener; private int mShadowRadius; private int mBackGroundColor; private int mProgressColor; private int mProgressStokeWidth; private int mArrowWidth; private int mArrowHeight; private int mProgress; private int mMax; private int mDiameter; private int mInnerRadius; private Paint mTextPaint; private int mTextColor; private int mTextSize; private boolean mIfDrawText; public CircleProgressBar(Context context) { super(context); init(context, null, 0); } public CircleProgressBar(Context context, AttributeSet attrs) { super(context, attrs); init(context, attrs, 0); } public CircleProgressBar(Context context, AttributeSet attrs, int defStyleAttr) { super(context, attrs, defStyleAttr); init(context, attrs, defStyleAttr); } private void init(Context context, AttributeSet attrs, int defStyleAttr) { final TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.CircleProgressBar, defStyleAttr, 0); // <attr name="mlpb_inner_radius" format="dimension"/> // <attr name="mlpb_background_color" format="color"/> // <attr name="mlpb_progress_color" format="color"/> // <attr name="mlpb_progress_stoke_width" format="dimension"/> // <attr name="mlpb_arrow_width" format="dimension"/> // <attr name="mlpb_arrow_height" format="dimension"/> // // <attr name="mlpb_progress" format="integer"/> // <attr name="mlpb_max" format="integer"/> // // // <attr name="mlpb_progress_text_size" format="dimension"/> // <attr name="mlpb_progress_text_color" format="color"/> // // <attr name="mlpb_progress_text_offset" format="dimension"/> // // <attr name="mlpb_progress_text_visibility" format="enum"> // <enum name="visible" value="0"/> // <enum name="invisible" value="1"/> // </attr> final float density = getContext().getResources().getDisplayMetrics().density; mBackGroundColor = a.getColor(R.styleable.CircleProgressBar_mlpb_background_color, DEFAULT_CIRCLE_BG_LIGHT); mProgressColor = a.getColor(R.styleable.CircleProgressBar_mlpb_progress_color, DEFAULT_CIRCLE_BG_LIGHT);//ToDO mInnerRadius = a.getDimensionPixelOffset(R.styleable.CircleProgressBar_mlpb_inner_radius, -1); mProgressStokeWidth = a.getDimensionPixelOffset(R.styleable.CircleProgressBar_mlpb_progress_stoke_width, (int) (STROKE_WIDTH_LARGE * density)); mArrowWidth = a.getDimensionPixelOffset(R.styleable.CircleProgressBar_mlpb_arrow_width, -1); mTextSize = a.getDimensionPixelOffset(R.styleable.CircleProgressBar_mlpb_progress_text_size, (int) (DEFAULT_TEXT_SIZE * density)); mTextColor = a.getColor(R.styleable.CircleProgressBar_mlpb_progress_text_color, Color.BLACK); mProgress = a.getInt(R.styleable.CircleProgressBar_mlpb_progress, 0); mMax = a.getInt(R.styleable.CircleProgressBar_mlpb_max, 100); int textVisible = a.getInt(R.styleable.CircleProgressBar_mlpb_progress_text_visibility, 1); if (textVisible != 1) { mIfDrawText = true; } mTextPaint = new Paint(); mTextPaint.setStyle(Paint.Style.FILL); mTextPaint.setColor(mTextColor); mTextPaint.setTextSize(mTextSize); mTextPaint.setAntiAlias(true); a.recycle(); } 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); } } @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) { final int shadowYOffset = (int) (density * Y_OFFSET); final int shadowXOffset = (int) (density * X_OFFSET); mShadowRadius = (int) (density * SHADOW_RADIUS); ShapeDrawable circle; if (elevationSupported()) { circle = new ShapeDrawable(new OvalShape()); ViewCompat.setElevation(this, SHADOW_ELEVATION * density); } else { OvalShape oval = new OvalShadow(mShadowRadius, mDiameter); circle = new ShapeDrawable(oval); ViewCompat.setLayerType(this, ViewCompat.LAYER_TYPE_SOFTWARE, circle.getPaint()); circle.getPaint().setShadowLayer(mShadowRadius, shadowXOffset, shadowYOffset, KEY_SHADOW_COLOR); final int padding = (int) mShadowRadius; // set padding so the inner image sits correctly within the shadow. setPadding(padding, padding, padding, padding); } circle.getPaint().setColor(mBackGroundColor); setBackgroundDrawable(circle); } if (getDrawable() == null) { MaterialProgressDrawable progressDrawable = new MaterialProgressDrawable(getContext(), this); progressDrawable.setBackgroundColor(mBackGroundColor); progressDrawable.setArrowScale(1f); // progressDrawable.showArrow(true); // progressDrawable.setStartEndTrim(0, 180); progressDrawable.setSizeParameters(mDiameter, mDiameter, mInnerRadius <= 0 ? (mDiameter - mProgressStokeWidth * 2) / 4 : mInnerRadius, mProgressStokeWidth, mArrowWidth < 0 ? mProgressStokeWidth * 4 : mArrowWidth, mArrowHeight < 0 ? mProgressStokeWidth * 2 : mArrowHeight); super.setImageDrawable(progressDrawable); progressDrawable.setAlpha(150); progressDrawable.start(); } } @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) { } @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()); } } /** * Update the background color of the circle image view. */ public void setBackgroundColor(int colorRes) { if (getBackground() instanceof ShapeDrawable) { final Resources res = getResources(); ((ShapeDrawable) getBackground()).getPaint().setColor(res.getColor(colorRes)); } } 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; } } 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 = CircleProgressBar.this.getWidth(); final int viewHeight = CircleProgressBar.this.getHeight(); canvas.drawCircle(viewWidth / 2, viewHeight / 2, (mCircleDiameter / 2 + mShadowRadius), mShadowPaint); canvas.drawCircle(viewWidth / 2, viewHeight / 2, (mCircleDiameter / 2), paint); } } }