1.仿微信下拉錄制視頻

介紹：

本項(xiàng)目高仿微信小視頻+秒拍，微信從6.0版本開始推出小視頻功能，隨著4G網(wǎng)絡(luò)的出現(xiàn)，視頻將會(huì)是一個(gè)趨勢(shì)，
他能表達(dá)出文字所不能表現(xiàn)的東西，增加了微信的黏性。?還記得微信小視頻這個(gè)功能一推出，如同病毒一樣席卷朋友圈。
由作者：Juns?Allen?精心編寫的
項(xiàng)目源碼：http://www.itlanbao.com/code/20151117/11253/100648.html

運(yùn)行效果：

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2.一個(gè)很酷的加載loading效果

介紹：

一個(gè)很酷的加載loading效果，自定義LeafLoadingView實(shí)現(xiàn)，LeafLoadingView繼承view,
本例子主要由以下幾點(diǎn)構(gòu)成
（1）：RotateAnimation實(shí)現(xiàn)葉子旋轉(zhuǎn)
（2）：葉子飄動(dòng)
（3）：當(dāng)前進(jìn)度繪制當(dāng)前進(jìn)度條
大體實(shí)現(xiàn)源碼如下：
?@Override
??? protected void onDraw(Canvas canvas) {
??????? super.onDraw(canvas);

??????? // 繪制進(jìn)度條和葉子
??????? // 之所以把葉子放在進(jìn)度條里繪制，主要是層級(jí)原因
??????? drawProgressAndLeafs(canvas);
??????? // drawLeafs(canvas);

??????? canvas.drawBitmap(mOuterBitmap, mOuterSrcRect, mOuterDestRect, mBitmapPaint);

??????? postInvalidate();
??? }

??? private void drawProgressAndLeafs(Canvas canvas) {

??????? if (mProgress >= TOTAL_PROGRESS) {
??????????? mProgress = 0;
??????? }
??????? // mProgressWidth為進(jìn)度條的寬度，根據(jù)當(dāng)前進(jìn)度算出進(jìn)度條的位置
??????? mCurrentProgressPosition = mProgressWidth * mProgress / TOTAL_PROGRESS;
??????? // 即當(dāng)前位置在圖中所示1范圍內(nèi)
??????? if (mCurrentProgressPosition < mArcRadius) {
??????????? Log.i(TAG, "mProgress = " + mProgress + "---mCurrentProgressPosition = "
??????????????????? + mCurrentProgressPosition
??????????????????? + "--mArcProgressWidth" + mArcRadius);
??????????? // 1.繪制白色ARC，繪制orange ARC
??????????? // 2.繪制白色矩形

??????????? // 1.繪制白色ARC
??????????? canvas.drawArc(mArcRectF, 90, 180, false, mWhitePaint);

??????????? // 2.繪制白色矩形
??????????? mWhiteRectF.left = mArcRightLocation;
??????????? canvas.drawRect(mWhiteRectF, mWhitePaint);

??????????? // 繪制葉子
??????????? drawLeafs(canvas);

??????????? // 3.繪制棕色 ARC
??????????? // 單邊角度
??????????? int angle = (int) Math.toDegrees(Math.acos((mArcRadius - mCurrentProgressPosition)
??????????????????? / (float) mArcRadius));
??????????? // 起始的位置
??????????? int startAngle = 180 - angle;
??????????? // 掃過(guò)的角度
??????????? int sweepAngle = 2 * angle;
??????????? Log.i(TAG, "startAngle = " + startAngle);
??????????? canvas.drawArc(mArcRectF, startAngle, sweepAngle, false, mOrangePaint);
??????? } else {
??????????? Log.i(TAG, "mProgress = " + mProgress + "---transfer-----mCurrentProgressPosition = "
??????????????????? + mCurrentProgressPosition
??????????????????? + "--mArcProgressWidth" + mArcRadius);
??????????? // 1.繪制white RECT
??????????? // 2.繪制Orange ARC
??????????? // 3.繪制orange RECT
??????????? // 這個(gè)層級(jí)進(jìn)行繪制能讓葉子感覺是融入棕色進(jìn)度條中

??????????? // 1.繪制white RECT
??????????? mWhiteRectF.left = mCurrentProgressPosition;
??????????? canvas.drawRect(mWhiteRectF, mWhitePaint);
??????????? // 繪制葉子
??????????? drawLeafs(canvas);
??????????? // 2.繪制Orange ARC
??????????? canvas.drawArc(mArcRectF, 90, 180, false, mOrangePaint);
??????????? // 3.繪制orange RECT
??????????? mOrangeRectF.left = mArcRightLocation;
??????????? mOrangeRectF.right = mCurrentProgressPosition;
??????????? canvas.drawRect(mOrangeRectF, mOrangePaint);

??????? }

??? }

??? /**
???? * 繪制葉子
???? *
???? * @param canvas
???? */
??? private void drawLeafs(Canvas canvas) {
??????? mLeafRotateTime = mLeafRotateTime <= 0 ? LEAF_ROTATE_TIME : mLeafRotateTime;
??????? long currentTime = System.currentTimeMillis();
??????? for (int i = 0; i < mLeafInfos.size(); i++) {
??????????? Leaf leaf = mLeafInfos.get(i);
??????????? if (currentTime > leaf.startTime && leaf.startTime != 0) {
??????????????? // 繪制葉子－－根據(jù)葉子的類型和當(dāng)前時(shí)間得出葉子的（x，y）
??????????????? getLeafLocation(leaf, currentTime);
??????????????? // 根據(jù)時(shí)間計(jì)算旋轉(zhuǎn)角度
??????????????? canvas.save();
??????????????? // 通過(guò)Matrix控制葉子旋轉(zhuǎn)
??????????????? Matrix matrix = new Matrix();
??????????????? float transX = mLeftMargin + leaf.x;
??????????????? float transY = mLeftMargin + leaf.y;
??????????????? Log.i(TAG, "left.x = " + leaf.x + "--leaf.y=" + leaf.y);
??????????????? matrix.postTranslate(transX, transY);
??????????????? // 通過(guò)時(shí)間關(guān)聯(lián)旋轉(zhuǎn)角度，則可以直接通過(guò)修改LEAF_ROTATE_TIME調(diào)節(jié)葉子旋轉(zhuǎn)快慢
??????????????? float rotateFraction = ((currentTime - leaf.startTime) % mLeafRotateTime)
??????????????????????? / (float) mLeafRotateTime;
??????????????? int angle = (int) (rotateFraction * 360);
??????????????? // 根據(jù)葉子旋轉(zhuǎn)方向確定葉子旋轉(zhuǎn)角度
??????????????? int rotate = leaf.rotateDirection == 0 ? angle + leaf.rotateAngle : -angle
??????????????????????? + leaf.rotateAngle;
??????????????? matrix.postRotate(rotate, transX
??????????????????????? + mLeafWidth / 2, transY + mLeafHeight / 2);
??????????????? canvas.drawBitmap(mLeafBitmap, matrix, mBitmapPaint);
??????????????? canvas.restore();
??????????? } else {
??????????????? continue;
??????????? }
??????? }
??? }

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運(yùn)行效果：

總結(jié)

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