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Add text alpha support for EvaporateText and fixed a bug #72

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Add text alpha support for EvaporateText and fixed a bug #72

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d5b95c2
Alpha Supported
Nov 7, 2017
26ed5c4
Alpha Supported
Nov 7, 2017
5abe30f
Alpha Supported
Nov 8, 2017
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19 changes: 14 additions & 5 deletions htextview-evaporate/src/main/java/com/hanks/htextview/evaporate/EvaporateText.java
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Original file line number Diff line number Diff line change
Expand Up @@ -3,6 +3,7 @@
import android.animation.Animator;
import android.animation.ValueAnimator;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Rect;
import android.text.Layout;
import android.util.AttributeSet;
Expand All @@ -27,6 +28,7 @@ public class EvaporateText extends HText {
float charTime = 300;
int mostCount = 20;
private int mTextHeight;
private int paintColor = Color.BLACK;

private List<CharacterDiffResult> differentList = new ArrayList<>();
private long duration;
Expand Down Expand Up @@ -111,16 +113,19 @@ protected void drawFrame(Canvas canvas) {
//
float pp = progress * duration / (charTime + charTime / mostCount * (mText.length() - 1));

mOldPaint.setColor(paintColor);
mPaint.setColor(paintColor);

mOldPaint.setTextSize(mTextSize);
int move = CharacterUtils.needMove(i, differentList);
if (move != -1) {
mOldPaint.setAlpha(255);
mOldPaint.setAlpha(Color.alpha(paintColor));
float p = pp * 2f;
p = p > 1 ? 1 : p;
float distX = CharacterUtils.getOffset(i, move, p, startX, oldStartX, gapList, oldGapList);
canvas.drawText(mOldText.charAt(i) + "", 0, 1, distX, startY, mOldPaint);
} else {
mOldPaint.setAlpha((int) ((1 - pp) * 255));
mOldPaint.setAlpha((int) ((1 - pp) * Color.alpha(paintColor)));
float y = startY - pp * mTextHeight;
float width = mOldPaint.measureText(mOldText.charAt(i) + "");
canvas.drawText(mOldText.charAt(i) + "", 0, 1, oldOffset + (oldGapList.get(i) - width) / 2, y, mOldPaint);
Expand All @@ -133,8 +138,8 @@ protected void drawFrame(Canvas canvas) {

if (!CharacterUtils.stayHere(i, differentList)) {

int alpha = (int) (255f / charTime * (progress * duration - charTime * i / mostCount));
alpha = alpha > 255 ? 255 : alpha;
int alpha = (int) ((float) Color.alpha(paintColor) / charTime * (progress * duration - charTime * i / mostCount));
alpha = alpha > Color.alpha(paintColor) ? Color.alpha(paintColor) : alpha;
alpha = alpha < 0 ? 0 : alpha;

mPaint.setAlpha(alpha);
Expand All @@ -151,4 +156,8 @@ protected void drawFrame(Canvas canvas) {
}
}

}
public void setTextColor(int color) {
this.paintColor = color;
}

}
7 changes: 6 additions & 1 deletion htextview-evaporate/src/main/java/com/hanks/htextview/evaporate/EvaporateTextView.java
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Expand Up @@ -52,9 +52,14 @@ public void animateText(CharSequence text) {
evaporateText.animateText(text);
}

@Override
public void setTextColor(int color) {
evaporateText.setTextColor(color);
}

@Override
protected void onDraw(Canvas canvas) {
// super.onDraw(canvas);
evaporateText.onDraw(canvas);
}
}
}