Android多颜色TextView功能实现

1、直接显示带有颜色标签的html字符串

textview.setText(Html.fromHtml(str)); //str为含有html标签的字符串

2、简单字符串变色功能

SpannableStringBuilder style = new SpannableStringBuilder(str);      //str要显示的字符串        style.setSpan(new ForegroundColorSpan(Color.BLUE), 0, 2,Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);      //0,2表示前两个字符显示蓝色       style.setSpan(new ForegroundColorSpan(Color.BLACK), 2, str.length(),Spannable.SPAN_EXCLUSIVE_INCLUSIVE);   //2到结尾显示黑色         textview.setText(style);

3、实现多颜色、多大小、多点击的功能

import java.util.ArrayList;import android.app.Activity;import android.graphics.Color;import android.os.Bundle;import android.util.Log;import android.widget.TextView;import android.widget.Toast;public class MainActivity extends Activity implements ClickListener {private TextView textView1;private ArrayList<String> str_list;private ArrayList<Integer> color_list;private ArrayList<Float> text_size_list;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);initView();setData();}private void initView() {textView1 = (TextView) findViewById(R.id.textView1);}private void setData() {str_list = new ArrayList<String>();color_list = new ArrayList<Integer>();text_size_list = new ArrayList<Float>();str_list.add("今天");str_list.add("天气");str_list.add("还不错！");color_list.add(Color.RED);color_list.add(Color.GREEN);color_list.add(Color.BLUE);text_size_list.add(15f);text_size_list.add(17f);text_size_list.add(20f);Util.setText(this, textView1, str_list, color_list, text_size_list,this);}@Overridepublic void click(int position) {Log.e("position", position + "");Toast.makeText(this, str_list.get(position), Toast.LENGTH_SHORT).show();}}

public interface ClickListener {public void click(int position);}

import java.util.ArrayList;import android.content.Context;import android.graphics.Color;import android.text.Spannable;import android.text.SpannableString;import android.text.Spanned;import android.text.TextPaint;import android.text.method.LinkMovementMethod;import android.text.style.AbsoluteSizeSpan;import android.text.style.ClickableSpan;import android.text.style.ForegroundColorSpan;import android.view.View;import android.view.View.OnClickListener;import android.widget.TextView;public class Util {public static void setText(Context context, TextView tv,ArrayList<String> str, ArrayList<Integer> color,ArrayList<Float> text_size_list, ClickListener clickListener) {// 累加数组所有的字符串为一个字符串StringBuffer long_str = new StringBuffer();for (int i = 0; i < str.size(); i++) {long_str.append(str.get(i));}SpannableString builder = new SpannableString(long_str.toString());// 设置不同字符串的点击事件for (int i = 0; i < str.size(); i++) {int p = i;int star = long_str.toString().indexOf(str.get(i));int end = star + str.get(i).length();builder.setSpan(new Clickable(clickListener, p), star, end,Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);}// 设置不同字符串的颜色ArrayList<ForegroundColorSpan> foregroundColorSpans = new ArrayList<ForegroundColorSpan>();for (int i = 0; i < color.size(); i++) {foregroundColorSpans.add(new ForegroundColorSpan(color.get(i)));}for (int i = 0; i < str.size(); i++) {int star = long_str.toString().indexOf(str.get(i));int end = star + str.get(i).length();builder.setSpan(foregroundColorSpans.get(i), star, end,Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);}// 设置不同字符串的字号ArrayList<AbsoluteSizeSpan> absoluteSizeSpans = new ArrayList<AbsoluteSizeSpan>();for (int i = 0; i < color.size(); i++) {absoluteSizeSpans.add(new AbsoluteSizeSpan(sp2px(context,text_size_list.get(i))));}for (int i = 0; i < str.size(); i++) {int star = long_str.toString().indexOf(str.get(i));int end = star + str.get(i).length();builder.setSpan(absoluteSizeSpans.get(i), star, end,Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);}// 设置点击后的颜色为透明，否则会一直出现高亮tv.setHighlightColor(Color.TRANSPARENT);tv.setClickable(true);tv.setMovementMethod(LinkMovementMethod.getInstance());tv.setText(builder);}public static int sp2px(Context context, float spValue) {final float fontScale = context.getResources().getDisplayMetrics().scaledDensity;return (int) (spValue * fontScale + 0.5f);}}class Clickable extends ClickableSpan implements OnClickListener {private final ClickListener clickListener;private int position;public Clickable(ClickListener clickListener, int position) {this.clickListener = clickListener;this.position = position;}@Overridepublic void onClick(View v) {clickListener.click(position);}@Overridepublic void updateDrawState(TextPaint ds) {// TODO Auto-generated method stubsuper.updateDrawState(ds);ds.setColor(Color.WHITE); // 设置文件颜色ds.setUnderlineText(false);}}