public class JustifyTextView extends TextView {
private int mLineY;
private int mViewWidth;
public JustifyTextView(Context context) {
super(context);
}
public JustifyTextView(Context context, AttributeSet attrs) {
super(context, attrs);
}
@Override
protected void onLayout(boolean changed, int left, int top, int right, int bottom) {
super.onLayout(changed, left, top, right, bottom);
}
@Override
protected void onDraw(Canvas canvas) {
TextPaint paint = getPaint();
paint.setColor(getCurrentTextColor());
// 返回绘制状态的资源ID数组表示视图的当前状态
paint.drawableState = getDrawableState();
// 对View上的内容进行测量后得到的View内容占据的宽度
// 前提是你必须在父布局的onLayout()方法或者此View的onDraw()方法里调用measure(0,0);
// 否则你得到的结果和getWidth()得到的结果一样。
mViewWidth = getMeasuredWidth();
// 获取文本
String text = getText().toString();
mLineY = 0;
mLineY += getTextSize();
// 获取用于显示当前文本的布局
Layout layout = getLayout();
if (layout == null) {
return;
}
Paint.FontMetrics fm = paint.getFontMetrics();
int textHeight = (int) (Math.ceil(fm.descent - fm.ascent));
textHeight = (int) (textHeight * layout.getSpacingMultiplier() + layout.getSpacingAdd());
for (int i = 0; i < layout.getLineCount(); i++) {
// 返回文本中的指定行开头的偏移
int lineStart = layout.getLineStart(i);
// 返回文本中的指定行最后一个字符的偏移
int lineEnd = layout.getLineEnd(i);
float width = StaticLayout.getDesiredWidth(text, lineStart, lineEnd, getPaint());
String line = text.substring(lineStart, lineEnd);
if (line.equals("")) {
break;
}
if (i < layout.getLineCount() - 1) {
if (needScale(line)) {
drawScaledText(canvas, lineStart, line, width);
} else {
// canvas.drawText(line.replace("%", ""), 0, mLineY, paint);
canvas.drawText(line, 0, mLineY, paint);
}
} else {
canvas.drawText(line, 0, mLineY, paint);
}
// 增加行高
mLineY += textHeight;
}
}
private void drawScaledText(Canvas canvas, int lineStart, String line,
float lineWidth) {
float x = 0;
if (isFirstLineOfParagraph(lineStart, line)) {
String blanks = " ";
canvas.drawText(blanks, x, mLineY, getPaint());
float bw = StaticLayout.getDesiredWidth(blanks, getPaint());
x += bw;
line = line.substring(3);
}
int gapCount = line.length() - 1;
int i = 0;
if (line.length() > 2 && line.charAt(0) == 12288
&& line.charAt(1) == 12288) {
String substring = line.substring(0, 2);
float cw = StaticLayout.getDesiredWidth(substring, getPaint());
canvas.drawText(substring, x, mLineY, getPaint());
x += cw;
i += 2;
}
float d = (mViewWidth - lineWidth) / gapCount;
for (; i < line.length(); i++) {
String c = String.valueOf(line.charAt(i));
float cw = StaticLayout.getDesiredWidth(c, getPaint());
canvas.drawText(c, x, mLineY, getPaint());
x += cw + d;
}
}
private boolean isFirstLineOfParagraph(int lineStart, String line) {
return line.length() > 3 && line.charAt(0) == ' ' && line.charAt(1) == ' ';
}
private boolean needScale(String line) {
if (line.length() == 0) {
return false;
} else {
// return line.charAt(line.length() - 1) != '%';
return line.charAt(line.length() - 1) != '\n';
}
}
这种情况应该如何解决,ClickableSpan是可以生效的