這期內(nèi)容當(dāng)中小編將會給大家?guī)碛嘘P(guān)怎么在Android應(yīng)用中實現(xiàn)一個圖案解鎖功能,文章內(nèi)容豐富且以專業(yè)的角度為大家分析和敘述,閱讀完這篇文章希望大家可以有所收獲。
我們提供的服務(wù)有:網(wǎng)站設(shè)計、網(wǎng)站建設(shè)、微信公眾號開發(fā)、網(wǎng)站優(yōu)化、網(wǎng)站認(rèn)證、雙峰ssl等。為近1000家企事業(yè)單位解決了網(wǎng)站和推廣的問題。提供周到的售前咨詢和貼心的售后服務(wù),是有科學(xué)管理、有技術(shù)的雙峰網(wǎng)站制作公司1.最關(guān)健的就是那個自定義九宮格View,代碼來自framework下:LockPatternView,原生系統(tǒng)用的圖片資源比較多,好像有7、8張吧,而且繪制的比較復(fù)雜,我找尋半天,眼睛都找瞎了,發(fā)現(xiàn)解壓的QQ里面就3張圖片,一個圈圈,兩個點,沒辦法,只能修改代碼了,在修改的過程中,才發(fā)現(xiàn),其實可以把原生的LockPatternView給簡化,繪制更少的圖片,達到更好的效果??偣矁?yōu)化有:①去掉了連線的箭頭,②原生的連線只有白色一種,改成根據(jù)不同狀態(tài)顯示黃色和紅色兩張色,③.原生view是先畫點再畫線,使得線覆蓋在點的上面,影響美觀,改成先畫連線再畫點。
關(guān)健部分代碼onDraw函數(shù):
@Override protected void onDraw(Canvas canvas) { final ArrayList<Cell> pattern = mPattern; final int count = pattern.size(); final boolean[][] drawLookup = mPatternDrawLookup; if (mPatternDisplayMode == DisplayMode.Animate) { // figure out which circles to draw // + 1 so we pause on complete pattern final int oneCycle = (count + 1) * MILLIS_PER_CIRCLE_ANIMATING; final int spotInCycle = (int) (SystemClock.elapsedRealtime() - mAnimatingPeriodStart) % oneCycle; final int numCircles = spotInCycle / MILLIS_PER_CIRCLE_ANIMATING; clearPatternDrawLookup(); for (int i = 0; i < numCircles; i++) { final Cell cell = pattern.get(i); drawLookup[cell.getRow()][cell.getColumn()] = true; } // figure out in progress portion of ghosting line final boolean needToUpdateInProgressPoint = numCircles > 0 && numCircles < count; if (needToUpdateInProgressPoint) { final float percentageOfNextCircle = ((float) (spotInCycle % MILLIS_PER_CIRCLE_ANIMATING)) / MILLIS_PER_CIRCLE_ANIMATING; final Cell currentCell = pattern.get(numCircles - 1); final float centerX = getCenterXForColumn(currentCell.column); final float centerY = getCenterYForRow(currentCell.row); final Cell nextCell = pattern.get(numCircles); final float dx = percentageOfNextCircle * (getCenterXForColumn(nextCell.column) - centerX); final float dy = percentageOfNextCircle * (getCenterYForRow(nextCell.row) - centerY); mInProgressX = centerX + dx; mInProgressY = centerY + dy; } // TODO: Infinite loop here... invalidate(); } final float squareWidth = mSquareWidth; final float squareHeight = mSquareHeight; float radius = (squareWidth * mDiameterFactor * 0.5f); mPathPaint.setStrokeWidth(radius); final Path currentPath = mCurrentPath; currentPath.rewind(); // TODO: the path should be created and cached every time we hit-detect // a cell // only the last segment of the path should be computed here // draw the path of the pattern (unless the user is in progress, and // we are in stealth mode) final boolean drawPath = (!mInStealthMode || mPatternDisplayMode == DisplayMode.Wrong); // draw the arrows associated with the path (unless the user is in // progress, and // we are in stealth mode) boolean oldFlag = (mPaint.getFlags() & Paint.FILTER_BITMAP_FLAG) != 0; mPaint.setFilterBitmap(true); // draw with higher quality since we // render with transforms // draw the lines if (drawPath) { boolean anyCircles = false; for (int i = 0; i < count; i++) { Cell cell = pattern.get(i); // only draw the part of the pattern stored in // the lookup table (this is only different in the case // of animation). if (!drawLookup[cell.row][cell.column]) { break; } anyCircles = true; float centerX = getCenterXForColumn(cell.column); float centerY = getCenterYForRow(cell.row); if (i == 0) { currentPath.moveTo(centerX, centerY); } else { currentPath.lineTo(centerX, centerY); } } // add last in progress section if ((mPatternInProgress || mPatternDisplayMode == DisplayMode.Animate) && anyCircles) { currentPath.lineTo(mInProgressX, mInProgressY); } // chang the line color in different DisplayMode if (mPatternDisplayMode == DisplayMode.Wrong) mPathPaint.setColor(Color.RED); else mPathPaint.setColor(Color.YELLOW); canvas.drawPath(currentPath, mPathPaint); } // draw the circles final int paddingTop = getPaddingTop(); final int paddingLeft = getPaddingLeft(); for (int i = 0; i < 3; i++) { float topY = paddingTop + i * squareHeight; // float centerY = mPaddingTop + i * mSquareHeight + (mSquareHeight // / 2); for (int j = 0; j < 3; j++) { float leftX = paddingLeft + j * squareWidth; drawCircle(canvas, (int) leftX, (int) topY, drawLookup[i][j]); } } mPaint.setFilterBitmap(oldFlag); // restore default flag }
文章名稱:怎么在Android應(yīng)用中實現(xiàn)一個圖案解鎖功能-創(chuàng)新互聯(lián)
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