首先感谢MTextView.java的原作者。由于找不到原作者的博客地址。我就贴下,我下载的源码的url:http://download.csdn.net/detail/yellowcath/7421147
然后,在这个MTextView.java的基础上进行了修改,增加了Html的颜色功能。
xxx
下面是源码!
import java.lang.ref.SoftReference;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Map;
import android.annotation.TargetApi;
import android.app.Activity;
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Rect;
import android.graphics.drawable.Drawable;
import android.os.Build;
import android.text.Html;
import android.text.SpannableString;
import android.text.Spanned;
import android.text.TextUtils;
import android.text.style.ForegroundColorSpan;
import android.text.style.ImageSpan;
import android.util.AttributeSet;
import android.util.DisplayMetrics;
import android.util.Log;
import android.widget.TextView;
/**
* @功能 图文混排TextView,请使用{@link #setMText(CharSequence)}
* @author huangwei
* @2014年5月27日
* @下午5:29:27
*/
public class MTextView extends TextView {
private static final String TAG = "MTextView" ;
private Context context;
/**
* 用于测量字符宽度
*/
private Paint paint = new Paint();
private int textColor = Color.BLACK;
private float lineSpacing;
private int lineSpacingDP = 2 ;
/**
* 最大宽度
*/
private int maxWidth;
/**
* 只有一行时的宽度
*/
private int oneLineWidth = -1 ;
/**
* 已绘的行中最宽的一行的宽度
*/
private float lineWidthMax = -1 ;
/**
* 存储当前文本内容,每个item为一个字符或者一个ImageSpan
*/
private ArrayList obList = new ArrayList();
/**
* 是否使用默认{@link TextView#onMeasure(int, int)}和{@link TextView#onDraw(Canvas)}
*/
private boolean useDefault = false ;
/**
* 存储当前文本内容,每个item为一行
*/
ArrayList contentList = new ArrayList();
/**
* 缓存测量过的数据
*/
private static HashMap> measuredData = new HashMap>();
private static int hashIndex = 0 ;
private CharSequence text = "" ;
/**
* 最小高度
*/
private int minHeight;
/**
* 用以获取屏幕高宽
*/
private DisplayMetrics displayMetrics;
public MTextView (Context context) {
super (context);
init(context);
}
public MTextView (Context context, AttributeSet attrs) {
super (context, attrs);
init(context);
}
public MTextView (Context context, AttributeSet attrs, int defStyleAttr) {
super (context, attrs, defStyleAttr);
init(context);
}
@TargetApi (Build.VERSION_CODES.LOLLIPOP)
public MTextView (Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) {
super (context, attrs, defStyleAttr, defStyleRes);
init(context);
}
private void init (Context context){
this .context = context;
paint.setAntiAlias(true );
lineSpacing = dip2px(context, lineSpacingDP);
minHeight = dip2px(context, 30 );
displayMetrics = new DisplayMetrics();
}
@Override
public void setMaxWidth (int maxpixels) {
super .setMaxWidth(maxpixels);
maxWidth = maxpixels;
}
@Override
public void setMinHeight (int minHeight)
{
super .setMinHeight(minHeight);
this .minHeight = minHeight;
}
@Override
protected void onMeasure (int widthMeasureSpec, int heightMeasureSpec){
if (useDefault){
super .onMeasure(widthMeasureSpec, heightMeasureSpec);
return ;
}
int width = 0 , height = 0 ;
int widthMode = MeasureSpec.getMode(widthMeasureSpec);
int heightMode = MeasureSpec.getMode(heightMeasureSpec);
int widthSize = MeasureSpec.getSize(widthMeasureSpec);
int heightSize = MeasureSpec.getSize(heightMeasureSpec);
switch (widthMode){
case MeasureSpec.EXACTLY:
width = widthSize;
break ;
case MeasureSpec.AT_MOST:
width = widthSize;
break ;
case MeasureSpec.UNSPECIFIED:
((Activity) context).getWindowManager().getDefaultDisplay().getMetrics(displayMetrics);
width = displayMetrics.widthPixels;
break ;
default :
break ;
}
if (maxWidth > 0 ) {
width = Math.min(width, maxWidth);
}
paint.setTextSize(this .getTextSize());
paint.setColor(textColor);
int realHeight = measureContentHeight((int ) width);
int leftPadding = getCompoundPaddingLeft();
int rightPadding = getCompoundPaddingRight();
width = Math.min(width, (int ) lineWidthMax + leftPadding+ rightPadding);
if (oneLineWidth > -1 ) {
width = oneLineWidth;
}
switch (heightMode) {
case MeasureSpec.EXACTLY:
height = heightSize;
break ;
case MeasureSpec.AT_MOST:
height = realHeight;
break ;
case MeasureSpec.UNSPECIFIED:
height = realHeight;
break ;
default :
break ;
}
height += getCompoundPaddingTop() + getCompoundPaddingBottom();
height = Math.max(height,minHeight);
setMeasuredDimension(width, height);
}
@Override
protected void onDraw (Canvas canvas) {
invalidate();
if (useDefault){
super .onDraw(canvas);
return ;
}
int width;
Object ob;
int leftPadding = getCompoundPaddingLeft();
int topPadding = getCompoundPaddingTop();
float height = 0 + topPadding + lineSpacing;
if (oneLineWidth != -1 ){
height = getMeasuredHeight() /2 - contentList.get(0 ).height/2 ;
}
for (int i = 0 ; i < contentList.size(); i++){
float realDrawedWidth = 0 + leftPadding;
LINE line = contentList.get(i);
for (int j = 0 ; j < line.line.size(); j++){
ob = line.line.get(j);
width = line.widthList.get(j);
if (ob instanceof ImageSpan){
ImageSpan is = (ImageSpan) ob;
Drawable d = is.getDrawable();
int left = (int ) (realDrawedWidth);
int top = (int ) height;
int right = (int ) (realDrawedWidth + width);
int bottom = (int ) (height + line.height);
d.setBounds(left, top, right, bottom);
d.draw(canvas);
realDrawedWidth += width;
}else if (ob instanceof String || ob instanceof StringWithColor){
String textStr = ob.toString();
paint.setColor(textColor);
if (ob instanceof StringWithColor){
paint.setColor(((StringWithColor)ob).color);
}
canvas.drawText(textStr, realDrawedWidth, height + line.height, paint);
realDrawedWidth += width;
}
}
height += line.height + lineSpacing;
}
}
@Override
public void setTextColor (int color){
super .setTextColor(color);
textColor = color;
}
/**
* 用于带ImageSpan的文本内容所占高度测量
* @param width 预定的宽度
* @return 所需的高度
*/
private int measureContentHeight (int width) {
int cachedHeight = getCachedData(text.toString(), width);
if (cachedHeight > 0 ) {
return cachedHeight;
}
float obWidth = 0 ;
float obHeight = 0 ;
float textSize = this .getTextSize();
float lineHeight = textSize;
float height = lineSpacing;
int leftPadding = getCompoundPaddingLeft();
int rightPadding = getCompoundPaddingRight();
float drawedWidth = 0 ;
width = width - leftPadding - rightPadding;
oneLineWidth = -1 ;
contentList.clear();
StringBuilder sb;
LINE line = new LINE();
for (int i = 0 ; i < obList.size(); i++) {
Object ob = obList.get(i);
if (ob instanceof ImageSpan) {
Rect r = ((ImageSpan) ob).getDrawable().getBounds();
obWidth = r.right - r.left;
obHeight = r.bottom - r.top;
if (obHeight > lineHeight) {
lineHeight = obHeight;
}
}else if (ob instanceof String) {
obWidth = paint.measureText((String) ob);
obHeight = textSize;
}else if (ob instanceof StringWithColor){
obWidth = paint.measureText( ((StringWithColor) ob).str );
obHeight = textSize;
}
if (width - drawedWidth < obWidth) {
contentList.add(line);
if (drawedWidth > lineWidthMax){
lineWidthMax = drawedWidth;
}
drawedWidth = 0 ;
height += line.height + lineSpacing;
lineHeight = obHeight;
line = new LINE();
}
drawedWidth += obWidth;
if ((ob instanceof String || ob instanceof StringWithColor)
&& line.line.size() > 0
&& (line.line.get(line.line.size() - 1 ) instanceof String)){
if (ob instanceof StringWithColor){
ob = ob.toString();
}
int size = line.line.size();
sb = new StringBuilder();
sb.append(line.line.get(size - 1 ));
sb.append(ob);
ob = sb.toString();
obWidth = obWidth + line.widthList.get(size - 1 );
line.line.set(size - 1 , ob);
line.widthList.set(size - 1 , (int ) obWidth);
line.height = (int ) lineHeight;
}else {
line.line.add(ob);
line.widthList.add((int ) obWidth);
line.height = (int ) lineHeight;
}
}
if (line != null && line.line.size() > 0 ) {
contentList.add(line);
height += lineHeight + lineSpacing;
}
if (contentList.size() <= 1 ) {
oneLineWidth = (int ) drawedWidth + leftPadding + rightPadding;
height = lineSpacing + lineHeight + lineSpacing;
}
cacheData(width,(int ) height);
return (int ) height;
}
/**
* 获取缓存的测量数据,避免多次重复测量
* @param text
* @param width
* @return height
*/
@SuppressWarnings ("unchecked" )
private int getCachedData (String text, int width){
SoftReference cache = measuredData.get(text);
if (cache == null ) {
return -1 ;
}
MeasuredData md = cache.get();
if (md != null && md.textSize == this .getTextSize() && width == md.width) {
lineWidthMax = md.lineWidthMax;
contentList = (ArrayList) md.contentList.clone();
oneLineWidth = md.oneLineWidth;
StringBuilder sb = new StringBuilder();
for (int i=0 ;ireturn md.measuredHeight;
}else {
return -1 ;
}
}
/**
* 缓存已测量的数据
* @param width
* @param height
*/
@SuppressWarnings ("unchecked" )
private void cacheData (int width, int height)
{
MeasuredData md = new MeasuredData();
md.contentList = (ArrayList) contentList.clone();
md.textSize = this .getTextSize();
md.lineWidthMax = lineWidthMax;
md.oneLineWidth = oneLineWidth;
md.measuredHeight = height;
md.width = width;
md.hashIndex = ++hashIndex;
StringBuilder sb = new StringBuilder();
for (int i=0 ;i cache = new SoftReference(md);
measuredData.put(text.toString(),cache);
}
/**
* 用本函数代替{@link #setText(CharSequence)}
* @param textStr
*/
public void setMText (CharSequence textStr) {
text = textStr;
obList.clear();
ArrayList isList = new ArrayList<>();
useDefault = false ;
if (textStr instanceof SpannableString) {
SpannableString ss = (SpannableString) textStr;
ForegroundColorSpan[] spanneds = ss.getSpans(0 , ss.length(), ForegroundColorSpan.class);
for (int i = 0 ; i < spanneds.length; i++) {
int s = ss.getSpanStart(spanneds[i]);
int e = ss.getSpanEnd(spanneds[i]);
ForegroundColorSpanBean spanBean = new ForegroundColorSpanBean();
spanBean.fcspan = spanneds[i];
spanBean.start = s;
spanBean.end = e;
isList.add(spanBean);
}
ImageSpan[] imageSpans = ss.getSpans(0 , ss.length(), ImageSpan.class);
for (int i = 0 ; i < imageSpans.length; i++) {
int s = ss.getSpanStart(imageSpans[i]);
int e = ss.getSpanEnd(imageSpans[i]);
IS iS = new IS();
iS.is = imageSpans[i];
iS.start = s;
iS.end = e;
isList.add(iS);
}
}
if (isList.size() > 1 ){
for (int i = 0 ; i < isList.size()-1 ;i++){
for (int j = (i+1 ) ; j < isList.size();j++){
SpanBean temp01 = isList.get(i);
SpanBean temp02 = isList.get(j);
if (temp01.start > temp02.start){
isList.set(i,temp02);
isList.set(j,temp01);
}
}
}
}
String str = textStr.toString();
for (int i = 0 , j = 0 ; i < textStr.length();) {
if (j < isList.size()) {
SpanBean spanBean = isList.get(j);
if (i < spanBean.start) {
Integer cp = str.codePointAt(i);
if (Character.isSupplementaryCodePoint(cp)) {
i += 2 ;
}else {
i++;
}
obList.add(new String(Character.toChars(cp)));
}else if (i >= spanBean.start) {
if (spanBean instanceof IS){
obList.add(((IS)spanBean).is);
j++;
i = spanBean.end;
}else if (spanBean instanceof ForegroundColorSpanBean){
Integer cp = str.codePointAt(i);
if (Character.isSupplementaryCodePoint(cp)){
i += 2 ;
}else {
i++;
}
obList.add(new StringWithColor(new String(Character.toChars(cp)),
((ForegroundColorSpanBean)spanBean).fcspan.getForegroundColor()));
if (i >= spanBean.end){
j++;
}
}else {
Log.e(TAG , "--- geolo 异常情况,需要排查 ---" );
}
}
}else {
Integer cp = str.codePointAt(i);
if (Character.isSupplementaryCodePoint(cp)){
i += 2 ;
}else {
i++;
}
obList.add(new String(Character.toChars(cp)));
}
}
requestLayout();
}
public void setUseDefault (boolean useDefault) {
this .useDefault = useDefault;
if (useDefault) {
this .setText(text);
this .setTextColor(textColor);
}
}
public static int px2sp (Context context, float pxValue)
{
final float fontScale = context.getResources().getDisplayMetrics().scaledDensity;
return (int ) (pxValue / fontScale + 0.5 f);
}
/**
* 根据手机的分辨率从 dp 的单位 转成为 px(像素)
*/
public static int dip2px (Context context, float dpValue) {
final float scale = context.getResources().getDisplayMetrics().density;
return (int ) (dpValue * scale + 0.5 f);
}
/**
* @功能: 所有Span的结构体
*/
class SpanBean{
public int start;
public int end;
}
/**
* @功能: 存储ImageSpan及其开始结束位置
*/
class IS extends SpanBean{
public ImageSpan is;
}
/**
* @功能: 存储ForegroundColorSpan及其开始结束位置
* 带颜色的字符串(Html)
*/
class ForegroundColorSpanBean extends SpanBean{
public ForegroundColorSpan fcspan;
public String str;
}
/**
* @功能: 包含颜色值的字符串
*/
class StringWithColor{
int color = 0 ;
String str;
StringWithColor(String str , int color){
this .str = str;
this .color = color;
}
@Override
public String toString () {
return str;
}
}
/**
* @功能: 存储测量好的一行数据
* @author huangwei
* @2014年5月27日
* @下午5:22:12
*/
class LINE {
public ArrayList line = new ArrayList();
public ArrayList widthList = new ArrayList();
public int height;
@Override
public String toString () {
StringBuilder sb = new StringBuilder("height:" +height+" " );
for (int i=0 ;i":"+widthList.get(i));
}
return sb.toString();
}
}
/**
* @功能: 缓存的数据
* @author huangwei
* @2014年5月27日
* @下午5:22:25
*/
class MeasuredData {
public int measuredHeight;
public float textSize;
public int width;
public float lineWidthMax;
ArrayList contentList;
public int oneLineWidth;
public int hashIndex;
}
}