安卓定义控件Multimedia

Android开源在线音乐播放器——波尼音乐

2016-06-08  本文已影响17877人  王晨彦

波尼音乐

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系列文章

前言

毕业设计做的项目,答辩完了,就共享出来。

简介

波尼音乐是一款开源Android在线音乐播放器。

更新说明

v 1.3.0

v 1.2.3

v 1.2.0

v 1.1.0

v 1.0.0

下载地址

蒲公英:https://www.pgyer.com/ponymusic

TODO

项目

公开API

开源技术

关键代码

黑胶唱片专辑封面绘制流程

@Override
protected void onDraw(Canvas canvas) {
    // 1.绘制顶部虚线
    mTopLine.setBounds(0, 0, getWidth(), mTopLineHeight);
    mTopLine.draw(canvas);
    // 2.绘制黑胶唱片外侧半透明边框
    mCoverBorder.setBounds(mDiscPoint.x - mCoverBorderWidth, mDiscPoint.y - mCoverBorderWidth,
            mDiscPoint.x + mDiscBitmap.getWidth() + mCoverBorderWidth, mDiscPoint.y +
                    mDiscBitmap.getHeight() + mCoverBorderWidth);
    mCoverBorder.draw(canvas);
    // 3.绘制黑胶
    // 设置旋转中心和旋转角度,setRotate和preTranslate顺序很重要
    mDiscMatrix.setRotate(mDiscRotation, mDiscCenterPoint.x, mDiscCenterPoint.y);
    // 设置图片起始坐标
    mDiscMatrix.preTranslate(mDiscPoint.x, mDiscPoint.y);
    canvas.drawBitmap(mDiscBitmap, mDiscMatrix, null);
    // 4.绘制封面
    mCoverMatrix.setRotate(mDiscRotation, mCoverCenterPoint.x, mCoverCenterPoint.y);
    mCoverMatrix.preTranslate(mCoverPoint.x, mCoverPoint.y);
    canvas.drawBitmap(mCoverBitmap, mCoverMatrix, null);
    // 5.绘制指针
    mNeedleMatrix.setRotate(mNeedleRotation, mNeedleCenterPoint.x, mNeedleCenterPoint.y);
    mNeedleMatrix.preTranslate(mNeedlePoint.x, mNeedlePoint.y);
    canvas.drawBitmap(mNeedleBitmap, mNeedleMatrix, null);
}

歌词绘制流程

@Override
protected void onDraw(Canvas canvas) {
    super.onDraw(canvas);
    // 中心Y坐标
    float centerY = getHeight() / 2 + mTextSize / 2 + mAnimOffset;

    // 无歌词文件
    if (!hasLrc()) {
        float centerX = (getWidth() - mCurrentPaint.measureText(label)) / 2;
        canvas.drawText(label, centerX, centerY, mCurrentPaint);
        return;
    }

    // 画当前行
    String currStr = mLrcTexts.get(mCurrentLine);
    float currX = (getWidth() - mCurrentPaint.measureText(currStr)) / 2;
    canvas.drawText(currStr, currX, centerY, mCurrentPaint);

    // 画当前行上面的
    for (int i = mCurrentLine - 1; i >= 0; i--) {
        String upStr = mLrcTexts.get(i);
        float upX = (getWidth() - mNormalPaint.measureText(upStr)) / 2;
        float upY = centerY - (mTextSize + mDividerHeight) * (mCurrentLine - i);
        // 超出屏幕停止绘制
        if (upY - mTextSize < 0) {
            break;
        }
        canvas.drawText(upStr, upX, upY, mNormalPaint);
    }

    // 画当前行下面的
    for (int i = mCurrentLine + 1; i < mLrcTimes.size(); i++) {
        String downStr = mLrcTexts.get(i);
        float downX = (getWidth() - mNormalPaint.measureText(downStr)) / 2;
        float downY = centerY + (mTextSize + mDividerHeight) * (i - mCurrentLine);
        // 超出屏幕停止绘制
        if (downY > getHeight()) {
            break;
        }
        canvas.drawText(downStr, downX, downY, mNormalPaint);
    }
}

截图

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关于作者

简书:http://www.jianshu.com/users/3231579893ac

微博:http://weibo.com/wangchenyan1993

License

Copyright 2016 wangchenyan

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.
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