/
AnvilText.java
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/
AnvilText.java
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package com.hanks.htextview.animatetext;
import android.animation.ValueAnimator;
import android.content.res.Resources;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Matrix;
import android.graphics.Paint;
import android.graphics.Rect;
import android.view.animation.BounceInterpolator;
import com.hanks.htextview.R;
import com.hanks.htextview.util.CharacterUtils;
import java.lang.reflect.Field;
/**
* Created by hanks on 15-12-14.
*/
public class AnvilText extends HText {
private Paint bitmapPaint;
private Bitmap[] smokes = new Bitmap[50];
private float ANIMA_DURATION = 800;
private int mTextHeight = 0;
private int mTextWidth;
private float progress;
private Matrix mMatrix;
private float dstWidth;
@Override
protected void initVariables() {
bitmapPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
bitmapPaint.setColor(Color.WHITE);
bitmapPaint.setStyle(Paint.Style.FILL);
// load drawable
try {
for (int j = 0; j < 50; j++) {
String drawable;
if (j < 10) {
drawable = "wenzi000" + j;
} else {
drawable = "wenzi00" + j;
}
Resources resources = mHTextView.getResources();
int imgId = resources.getIdentifier(drawable, "drawable", mHTextView.getContext().getPackageName());
smokes[j] = BitmapFactory.decodeResource(resources, imgId);
}
} catch (Exception e) {
e.printStackTrace();
}
mMatrix = new Matrix();
}
@Override
protected void animateStart(CharSequence text) {
ValueAnimator valueAnimator = ValueAnimator.ofFloat(0, 1)
.setDuration((long) ANIMA_DURATION);
valueAnimator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
@Override
public void onAnimationUpdate(ValueAnimator animation) {
progress = (float) animation.getAnimatedValue();
mHTextView.invalidate();
}
});
valueAnimator.start();
if (smokes.length > 0) {
mMatrix.reset();
dstWidth = mTextWidth * 1.2f;
if (dstWidth < 404f) dstWidth = 404f;
mMatrix.postScale(dstWidth / (float) smokes[0].getWidth(), 1f);
}
}
@Override
protected void animatePrepare(CharSequence text) {
Rect bounds = new Rect();
mPaint.getTextBounds(mText.toString(), 0, mText.length(), bounds);
mTextHeight = bounds.height();
mTextWidth = bounds.width();
}
@Override
protected void drawFrame(Canvas canvas) {
float offset = startX;
float oldOffset = oldStartX;
int maxLength = Math.max(mText.length(), mOldText.length());
float percent = progress;
boolean showSmoke = false;
for (int i = 0; i < maxLength; i++) {
// draw old text
if (i < mOldText.length()) {
mOldPaint.setTextSize(mTextSize);
int move = CharacterUtils.needMove(i, differentList);
if (move != -1) {
mOldPaint.setAlpha(255);
float p = percent * 2f;
p = p > 1 ? 1 : p;
float distX = CharacterUtils.getOffset(i, move, p, startX, oldStartX, gaps, oldGaps);
canvas.drawText(mOldText.charAt(i) + "", 0, 1, distX, startY, mOldPaint);
} else {
float p = percent * 2f;
p = p > 1 ? 1 : p;
mOldPaint.setAlpha((int) ((1 - p) * 255));
canvas.drawText(mOldText.charAt(i) + "", 0, 1, oldOffset, startY, mOldPaint);
}
oldOffset += oldGaps[i];
}
// draw new text
if (i < mText.length()) {
if (!CharacterUtils.stayHere(i, differentList)) {
showSmoke = true;
float interpolation = new BounceInterpolator().getInterpolation(percent);
mPaint.setAlpha(255);
mPaint.setTextSize(mTextSize);
float y = startY - (1 - interpolation) * mTextHeight * 2;
float width = mPaint.measureText(mText.charAt(i) + "");
canvas.drawText(mText.charAt(i) + "", 0, 1, offset + (gaps[i] - width) / 2, y, mPaint);
}
offset += gaps[i];
}
}
if (percent > 0.3 && percent < 1) {
if (showSmoke) {
drawSmokes(canvas, startX + (offset - startX) / 2f, startY - 50, percent);
}
}
}
private void drawSmokes(Canvas canvas, float x, float y, float percent) {
Bitmap b = smokes[0];
try {
int index = (int) (50 * percent);
if (index < 0) index = 0;
if (index >= 50) index = 49;
b = smokes[index];
} catch (Exception e) {
e.printStackTrace();
}
if (b != null) {
float dx = (mHTextView.getWidth() - dstWidth) / 2 > 0 ? (mHTextView.getWidth() - dstWidth) / 2 : 0;
canvas.translate(dx, (mHTextView.getHeight() - b.getHeight()) / 2);
canvas.drawBitmap(b, mMatrix, bitmapPaint);
}
}
}