SpannableString 给TextView添加不同的显示样式
SpannableString 给TextView添加不同的显示样式
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());
关键方法： public void setSpan (Object what, int start, int end, int flags)
下面是一个详细的例子：
public class TextViewJump2Activity extends Activity {
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() {
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;
}
}