android跳转web,Android如何通过TextView实现超链接的跳转app内置web

终于解决了这个问题，记录一下

activity代码

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

textView = findViewById(R.id.tv);

String str ="单击打开 百度首页";

textView.setText(Html.fromHtml(str));

interceptHyperLink(textView);

}

/**

* 拦截超链接

*

* @param tv

*/

private void interceptHyperLink(TextView tv) {

tv.setMovementMethod(LinkMovementMethod.getInstance());

CharSequence text = tv.getText();

if (textinstanceof Spannable) {

int end = text.length();

Spannable spannable = (Spannable) tv.getText();

URLSpan[] urlSpans = spannable.getSpans(0, end, URLSpan.class);

if (urlSpans.length ==0) {

return;

}

//            SpannableStringBuilder spannableStringBuilder = new SpannableStringBuilder(text);

SpannableStringBuilder spannableStringBuilder =setTextLinkOpenByWebView(this, text.toString());

// 循环遍历并拦截 所有http://开头的链接

for (URLSpan uri : urlSpans) {

String url = uri.getURL();

if (url.indexOf("http://") ==0) {

CustomUrlSpan customUrlSpan =new CustomUrlSpan(this, url);

spannableStringBuilder.setSpan(customUrlSpan, spannable.getSpanStart(uri),

spannable.getSpanEnd(uri), Spannable.SPAN_INCLUSIVE_EXCLUSIVE);

}

}

tv.setText(spannableStringBuilder);

}

}

public static SpannableStringBuildersetTextLinkOpenByWebView(final Context context, String answerString) {

if (!TextUtils.isEmpty(answerString)) {

Spanned htmlString = Html.fromHtml(answerString);

if (htmlStringinstanceof SpannableStringBuilder) {

SpannableStringBuilder spannableStringBuilder = (SpannableStringBuilder) htmlString;

// 取得与a标签相关的Span

Object[] objs = spannableStringBuilder.getSpans(0, spannableStringBuilder.length(), URLSpan.class);

if (null != objs && objs.length !=0) {

for (Object obj : objs) {

int start = spannableStringBuilder.getSpanStart(obj);

int end = spannableStringBuilder.getSpanEnd(obj);

if (objinstanceof URLSpan) {

//先移除这个Span，再新添加一个自己实现的Span。

URLSpan span = (URLSpan) obj;

final String url = span.getURL();

spannableStringBuilder.removeSpan(obj);

spannableStringBuilder.setSpan(new ClickableSpan() {

@Override

public void onClick(View widget) {

Intent intent =new Intent(context, WebViewActivity.class);

context.startActivity(intent);

}

}, start, end, Spanned.SPAN_INCLUSIVE_EXCLUSIVE);

}

}

}

return spannableStringBuilder;

}

}

return new SpannableStringBuilder(answerString);

}

自定义ClickableSpan子类的CustomUrlSpan的主要代码如下所示：

public class CustomUrlSpan extends ClickableSpan {

private Contextcontext;

private Stringurl;

public CustomUrlSpan(Context context, String url) {

this.context = context;

this.url = url;

}

@Override

public void onClick(View widget) {

// 在这里可以做任何自己想要的处理

Intent intent =new Intent(context, WebViewActivity.class);

//        intent.putExtra(WebViewActivity.WEB_URL,url);

context.startActivity(intent);

}

}

具体的布局就是一个textview，另外webview代码很简单，不贴了。