Android开发技巧三--格式化TextView文本

本例主要研究一下如何在TextView中显示网页链接和改变特定文字颜色

1.main.xml

package com.yayun.edittextdatedemo;

import android.app.Activity;
import android.graphics.Color;
import android.os.Bundle;
import android.text.Html;
import android.text.Spannable;
import android.text.SpannableString;
import android.text.method.LinkMovementMethod;
import android.text.style.BackgroundColorSpan;
import android.text.style.ForegroundColorSpan;
import android.widget.TextView;

public class MainActivity extends Activity {
	private TextView mTextView1;
	private TextView mTextView2;

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		mTextView1=(TextView) findViewById(R.id.tv_url);
		mTextView2=(TextView) findViewById(R.id.tv_color);
		
		String text="Visit 百度网";
		mTextView1.setText(Html.fromHtml(text));//以链接的形式显示
		mTextView1.setMovementMethod(LinkMovementMethod.getInstance());//在单击链接时凡是要执行的动作，都必须设置MovementMethod对象

		Spannable sTextSpannable=new SpannableString(mTextView2.getText());
		sTextSpannable.setSpan(new BackgroundColorSpan(Color.RED),1,4,0);//spannableString.setSpan(backgroundColorSpan, start, end, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
		sTextSpannable.setSpan(new ForegroundColorSpan(Color.BLUE),5,9,0);
		mTextView2.setText(sTextSpannable);
		
	}

}

总结

1.Html.fromHtml(text)，将文本转成html形式；

2.mTextView1.setMovementMethod(LinkMovementMethod.getInstance());//在单击链接时凡是要执行的动作，都必须设置MovementMethod对象

3.sTextSpannable.setSpan(new BackgroundColorSpan(Color.RED),1,4,0);//spannableString.setSpan(backgroundColorSpan, start, end, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);