TextView是用来显示文本的,有时需要给TextView中的个别字设置为超链接,或者设置个别字的颜色、字体等,那就需要用到Spannable对象,可以借助Spannable对象实现以上设置
myTextView = (TextView) this.findViewById(R.id.myTextView); //创建一个 SpannableString对象 SpannableString sp = new SpannableString("这句话中有百度超链接,有高亮显示,这样,或者这样,还有斜体."); //设置超链接 sp.setSpan(new URLSpan("http://www.baidu.com"), 5, 7, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); //设置高亮样式一 sp.setSpan(new BackgroundColorSpan(Color.RED), 17 ,19,Spannable.SPAN_EXCLUSIVE_EXCLUSIVE); //设置高亮样式二 sp.setSpan(new ForegroundColorSpan(Color.YELLOW),20,24,Spannable.SPAN_EXCLUSIVE_INCLUSIVE); //设置斜体 sp.setSpan(new StyleSpan(android.graphics.Typeface.BOLD_ITALIC), 27, 29, Spannable.SPAN_EXCLUSIVE_INCLUSIVE); //SpannableString对象设置给TextView myTextView.setText(sp); //设置TextView可点击 myTextView.setMovementMethod(LinkMovementMethod.getInstance());
textview显示不同的颜色、样式来表示,需要用到SpannableString对象来处理
下面是从网上找的一段代码,已验证过:
mTextView = (TextView)findViewById(R.id.test);
SpannableString tSS = new SpannableString(“SpannableString学习中”);
tSS.setSpan(new BackgroundColorSpan(Color.RED), 0, 2, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE); //红色高亮
tSS.setSpan(new UnderlineSpan(), 15, 18,Spannable.SPAN_EXCLUSIVE_EXCLUSIVE); //下划线
tSS.setSpan(new StyleSpan(android.graphics.Typeface.BOLD_ITALIC), 2, 5, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE); //斜体
mTextView.setText(tSS);
关键方法:
public void setSpan (Object what, int start, int end, int flags)
主要是start跟end
start是起始位置,无论中英文,都算一个。从0开始计算起。end是结束位置,所以处理的文字,包含开始位置,但不包含结束位置。
下面解决点击不同文字跳转到不同activity的问题:
直接贴代码:
package com.feel; import android.app.Activity; import android.os.Bundle; import android.text.SpannableString; import android.text.Spanned; import android.text.method.LinkMovementMethod; import android.text.style.ClickableSpan; import android.view.View; import android.view.View.OnClickListener; import android.widget.LinearLayout; import android.widget.TextView; import android.widget.Toast; public class TextViewJump2Activity extends Activity { /** Called when the activity is first created. */ private TextView mClickableText; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); LinearLayout layout = new LinearLayout(this); mClickableText = new TextView(this); mClickableText.setClickable(true); mClickableText.setTextSize(20); layout.addView(mClickableText); setContentView(layout); mClickableText.setText(getClickableSpan()); mClickableText.setMovementMethod(LinkMovementMethod.getInstance()); } private SpannableString getClickableSpan() { View.OnClickListener l = new View.OnClickListener() { //如下定义自己的动作 public void onClick(View v) { Toast.makeText(TextViewJump2Activity.this, "Click Success", Toast.LENGTH_SHORT).show(); //在这里就可以做跳转到activity或者弹出对话框的操作了 } }; SpannableString spanableInfo = new SpannableString("This is a test, Click Here!"); int start = 16; int end = spanableInfo.length(); spanableInfo.setSpan(new Clickable(l), start, end, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); return spanableInfo; } } class Clickable extends ClickableSpan implements OnClickListener { private final View.OnClickListener mListener; public Clickable(View.OnClickListener l) { mListener = l; } @Override public void onClick(View v) { mListener.onClick(v); } }