package com.hanks.htextview.animatetext; import android.animation.ValueAnimator; import android.content.Context; import android.graphics.Bitmap; import android.graphics.Canvas; import android.graphics.Color; import android.graphics.Matrix; import android.graphics.Paint; import android.graphics.Rect; import android.util.AttributeSet; import android.util.DisplayMetrics; import android.view.WindowManager; import android.view.animation.AccelerateDecelerateInterpolator; import com.hanks.htextview.HTextView; import com.hanks.htextview.util.CharacterUtils; import java.util.ArrayList; import java.util.List; /** * 缩放动画 * Created by hanks on 15-12-14. */ public class PixelateText implements IHText { public final static int SCALE = 8; float progress = 0; Paint paint, oldPaint; float charTime = 2000; int mostCount = 20; HTextView mHTextView; private float[] gaps = new float[100]; private float[] oldGaps = new float[100]; private DisplayMetrics metrics; private float textSize; private CharSequence mText; private CharSequence mOldText; private List<CharacterDiffResult> differentList = new ArrayList<>(); private float oldStartX = 0; private float startX = 0; private float startY = 0; private Bitmap bitmap; private Matrix matrix; private Paint pixPaint; private Canvas pixCanvas; public static Bitmap fastBlur(Bitmap sbitmap, float radiusf) { Bitmap bitmap = Bitmap.createScaledBitmap(sbitmap, sbitmap.getWidth() / SCALE, sbitmap.getHeight() / SCALE, false);//先缩放图片,增加模糊速度 int radius = (int) radiusf; if (radius < 1) { return (null); } int w = bitmap.getWidth(); int h = bitmap.getHeight(); int[] pix = new int[w * h]; bitmap.getPixels(pix, 0, w, 0, 0, w, h); int wm = w - 1; int hm = h - 1; int wh = w * h; int div = radius + radius + 1; int r[] = new int[wh]; int g[] = new int[wh]; int b[] = new int[wh]; int rsum, gsum, bsum, x, y, i, p, yp, yi, yw; int vmin[] = new int[Math.max(w, h)]; int divsum = (div + 1) >> 1; divsum *= divsum; int dv[] = new int[256 * divsum]; for (i = 0; i < 256 * divsum; i++) { dv[i] = (i / divsum); } yw = yi = 0; int[][] stack = new int[div][3]; int stackpointer; int stackstart; int[] sir; int rbs; int r1 = radius + 1; int routsum, goutsum, boutsum; int rinsum, ginsum, binsum; for (y = 0; y < h; y++) { rinsum = ginsum = binsum = routsum = goutsum = boutsum = rsum = gsum = bsum = 0; for (i = -radius; i <= radius; i++) { p = pix[yi + Math.min(wm, Math.max(i, 0))]; sir = stack[i + radius]; sir[0] = (p & 0xff0000) >> 16; sir[1] = (p & 0x00ff00) >> 8; sir[2] = (p & 0x0000ff); rbs = r1 - Math.abs(i); rsum += sir[0] * rbs; gsum += sir[1] * rbs; bsum += sir[2] * rbs; if (i > 0) { rinsum += sir[0]; ginsum += sir[1]; binsum += sir[2]; } else { routsum += sir[0]; goutsum += sir[1]; boutsum += sir[2]; } } stackpointer = radius; for (x = 0; x < w; x++) { r[yi] = dv[rsum]; g[yi] = dv[gsum]; b[yi] = dv[bsum]; rsum -= routsum; gsum -= goutsum; bsum -= boutsum; stackstart = stackpointer - radius + div; sir = stack[stackstart % div]; routsum -= sir[0]; goutsum -= sir[1]; boutsum -= sir[2]; if (y == 0) { vmin[x] = Math.min(x + radius + 1, wm); } p = pix[yw + vmin[x]]; sir[0] = (p & 0xff0000) >> 16; sir[1] = (p & 0x00ff00) >> 8; sir[2] = (p & 0x0000ff); rinsum += sir[0]; ginsum += sir[1]; binsum += sir[2]; rsum += rinsum; gsum += ginsum; bsum += binsum; stackpointer = (stackpointer + 1) % div; sir = stack[(stackpointer) % div]; routsum += sir[0]; goutsum += sir[1]; boutsum += sir[2]; rinsum -= sir[0]; ginsum -= sir[1]; binsum -= sir[2]; yi++; } yw += w; } for (x = 0; x < w; x++) { rinsum = ginsum = binsum = routsum = goutsum = boutsum = rsum = gsum = bsum = 0; yp = -radius * w; for (i = -radius; i <= radius; i++) { yi = Math.max(0, yp) + x; sir = stack[i + radius]; sir[0] = r[yi]; sir[1] = g[yi]; sir[2] = b[yi]; rbs = r1 - Math.abs(i); rsum += r[yi] * rbs; gsum += g[yi] * rbs; bsum += b[yi] * rbs; if (i > 0) { rinsum += sir[0]; ginsum += sir[1]; binsum += sir[2]; } else { routsum += sir[0]; goutsum += sir[1]; boutsum += sir[2]; } if (i < hm) { yp += w; } } yi = x; stackpointer = radius; for (y = 0; y < h; y++) { // Preserve alpha channel: ( 0xff000000 & pix[yi] ) pix[yi] = (0xff000000 & pix[yi]) | (dv[rsum] << 16) | (dv[gsum] << 8) | dv[bsum]; rsum -= routsum; gsum -= goutsum; bsum -= boutsum; stackstart = stackpointer - radius + div; sir = stack[stackstart % div]; routsum -= sir[0]; goutsum -= sir[1]; boutsum -= sir[2]; if (x == 0) { vmin[y] = Math.min(y + r1, hm) * w; } p = x + vmin[y]; sir[0] = r[p]; sir[1] = g[p]; sir[2] = b[p]; rinsum += sir[0]; ginsum += sir[1]; binsum += sir[2]; rsum += rinsum; gsum += ginsum; bsum += binsum; stackpointer = (stackpointer + 1) % div; sir = stack[stackpointer]; routsum += sir[0]; goutsum += sir[1]; boutsum += sir[2]; rinsum -= sir[0]; ginsum -= sir[1]; binsum -= sir[2]; yi += w; } } bitmap.setPixels(pix, 0, w, 0, 0, w, h); return (bitmap); } public void init(HTextView hTextView, AttributeSet attrs, int defStyle) { mHTextView = hTextView; mText = ""; mOldText = ""; paint = new Paint(Paint.ANTI_ALIAS_FLAG); paint.setColor(Color.BLACK); paint.setStyle(Paint.Style.FILL); paint.setTypeface(hTextView.getTypeface()); oldPaint = new Paint(Paint.ANTI_ALIAS_FLAG); oldPaint.setColor(Color.BLACK); oldPaint.setStyle(Paint.Style.FILL); oldPaint.setTypeface(hTextView.getTypeface()); pixPaint = new Paint(Paint.ANTI_ALIAS_FLAG); pixPaint.setColor(Color.BLACK); pixPaint.setStyle(Paint.Style.FILL); metrics = new DisplayMetrics(); WindowManager windowManger = (WindowManager) hTextView.getContext() .getSystemService(Context.WINDOW_SERVICE); windowManger.getDefaultDisplay().getMetrics(metrics); textSize = hTextView.getTextSize(); bitmap = Bitmap.createBitmap(700, 200, Bitmap.Config.ARGB_4444); matrix = new Matrix(); pixCanvas = new Canvas(bitmap); } @Override public void reset(CharSequence text) { progress = 1; calc(); mHTextView.invalidate(); } @Override public void animateText(CharSequence text) { mOldText = mText; mText = text; calc(); int n = mText.length(); n = n <= 0 ? 1 : n; long duration = (long) (charTime + charTime / mostCount * (n - 1)); ValueAnimator valueAnimator = ValueAnimator.ofFloat(0, duration).setDuration(duration); valueAnimator.setInterpolator(new AccelerateDecelerateInterpolator()); valueAnimator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() { @Override public void onAnimationUpdate(ValueAnimator animation) { progress = (float) animation.getAnimatedValue(); mHTextView.invalidate(); } }); valueAnimator.start(); } @Override public void onDraw(Canvas canvas) { float offset = startX; float oldOffset = oldStartX; float pp = progress / (charTime + charTime / mostCount * (mText.length() - 1)); int alpha = (int) (255 * pp); int oldAlpha = (int) (255 * (1 - pp)); alpha = alpha > 255 ? 255 : alpha; alpha = alpha < 0 ? 0 : alpha; oldAlpha = oldAlpha > 255 ? 255 : oldAlpha; oldAlpha = oldAlpha < 0 ? 0 : oldAlpha; oldPaint.setAlpha(oldAlpha); paint.setAlpha(alpha); pixCanvas.drawColor(Color.WHITE); pixCanvas.drawText(mOldText, 0, mOldText.length(), oldOffset, startY, oldPaint); pixCanvas.drawText(mText, 0, mText.length(), offset, startY, paint); Rect targetRect = new Rect(0, 0, 700, 200); canvas.drawBitmap(bitmap, matrix, pixPaint); } private void calc() { textSize = mHTextView.getTextSize(); paint.setTextSize(textSize); for (int i = 0; i < mText.length(); i++) { gaps[i] = paint.measureText(mText.charAt(i) + ""); } oldPaint.setTextSize(textSize); for (int i = 0; i < mOldText.length(); i++) { oldGaps[i] = oldPaint.measureText(mOldText.charAt(i) + ""); } oldStartX = (mHTextView.getWidth() - oldPaint.measureText(mOldText.toString())) / 2f; startX = (mHTextView.getWidth() - paint.measureText(mText.toString())) / 2f; startY = (int) ((mHTextView.getHeight() / 2) - ((paint.descent() + paint.ascent()) / 2)); differentList.clear(); differentList.addAll(CharacterUtils.diff(mOldText, mText)); oldPaint.setTextSize(textSize); } }