Android 开源在线音乐播放器

 @Override protected void onDraw(Canvas canvas) { // 1.绘制顶部虚线 mTopLine.setBounds(0, getTop(), getWidth(), getTop() + 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); } 

 @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  getHeight()) { break; } canvas.drawText(downStr, downX, downY, mNormalPaint); } }