我正在创建简单的Webview应用程序与文本视图上的一些链接,并打开webview而不是默认浏览器中的链接.我的文字视图包含各种不同的URLS,我正在尝试打开我的应用程序的webview中的每个链接.
这里代码：
tv.setText("www.google.com www.facebook.com www.yahoo.com");
tv.setMovementMethod(LinkMovementMethod.getInstance());;
tv.setText(Html.fromHtml(tv.getText().toString()));
Linkify.addLinks(tv,Linkify.WEB_URLS);
WebViewClient yourWebClient = new WebViewClient()
{
// Override page so it's load on my view only
@Override
public boolean shouldOverrideUrlLoading(WebView view,String url)
{
// This line we let me load only pages inside Firstdroid Webpage
if ( url.contains("www") == true )
// Load new URL Don't override URL Link
return false;
// Return true to override url loading (In this case do nothing).
return true;
}
};
wv.getSettings().setJavaScriptEnabled(true);
wv.getSettings().setSupportZoom(true);
wv.getSettings().setBuiltInZoomControls(true);
wv.setWebViewClient(yourWebClient);
// Load URL
wv.loadUrl(url);
已经尝试了this,this和this的例子,但是无法解决我在textview中的多个链接的问题.请帮我解决这个问题.谢谢你的帮助.
编辑
我的Textview包含字符串：
hello xyz some more statements... xyz.com/abc/ hello xyz some more statements... xyz.com/abc/ hello xyz some more statements... xyz.com/abc/ hello xyz some more statements... xyz.com/abc/
像这样它有很多字符串和多个URL
解决方法
以下问题需要解决：
>链接TextView
>找到一种方式来收听TextView中的链接
>获取点击的链接的URL,并将其加载到WebView中
>可选：使TextView可点击,而不会失去选择文本的能力
>可选：在TextView中处理格式化的文本(不同的文字大小和样式)
#1链接TextView
这是最简单的问题,你已经解决了这个问题.我建议这样做：
String text = "These are some sample links:\nwww.google.com\nwww.facebook.com\nwww.yahoo.com"; Spannable spannable = new SpannableString( Html.fromHtml(text) ); Linkify.addLinks(spannable,Linkify.WEB_URLS);
我在这里使用一个Spannable来解决问题#2.
#2#3收听链接的点击并在WebView中打开它们
要查看链接何时被点击并检索我们必须打开的URL,我们用LinkSpan替换TextView中的所有URLSpans(这就是为什么我们需要一个Spannable)：
URLSpan[] spans = spannable.getSpans(0,spannable.length(),URLSpan.class);
for (URLSpan urlSpan : spans) {
LinkSpan linkSpan = new LinkSpan(urlSpan.getURL());
int spanStart = spannable.getSpanStart(urlSpan);
int spanEnd = spannable.getSpanEnd(urlSpan);
spannable.setSpan(linkSpan,spanStart,spanEnd,Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
spannable.removeSpan(urlSpan);
}
我们的LinkSpan只是抓住点击的网址,并在WebView中打开它：
private class LinkSpan extends URLSpan {
private LinkSpan(String url) {
super(url);
}
@Override
public void onClick(View view) {
String url = getURL();
if (mWebView != null && url != null) {
mWebView.loadUrl(url);
}
}
}
现在显然,我们必须在实例变量中保留对WebView的引用,以使其工作.为了使这个答案尽可能的短,我选择将LinkSpan定义为内部类,但我建议将其定义为顶级.注册一个监听器,或者将WebView作为参数传递给构造函数.
没有将MovementMethod设置为LinkMovementMethod,TextView将不会打开链接：
tv.setMovementMethod(LinkMovementMethod.getInstance()); tv.setText(spannable,BufferType.SPANNABLE);
最后但并非最不重要的是我们确保WebView不启动浏览器,而是加载该应用程序中的页面：
mWebView.setWebViewClient(new WebViewClient() {
@Override
public boolean shouldOverrideUrlLoading(WebView view,String url) {
// we handle the url ourselves if it's a network url (http / https)
return ! URLUtil.isNetworkUrl(url);
}
});
#4可点击并选择TextView#5格式的文本
如果MovementMethod设置为LinkMovementMethod,您可以单击链接,但是您不能再选择文本(您需要使用ArrowKeyMovementMethod).为了解决这个问题,我创建了一个自定义的MoveMethod类,它继承自ArrowKeyMovementMethod,并添加了点击链接的功能.最重要的是可以处理格式化的文本.因此,如果您决定在TextView中使用不同的字体大小和样式,则以下MovementMethod将被覆盖(与EditTexts一起使用)：
/**
* ArrowKeyMovementMethod does support selection of text but not the clicking of links.
* LinkMovementMethod does support clicking of links but not the selection of text.
* This class adds the link clicking to the ArrowKeyMovementMethod.
* We basically take the LinkMovementMethod onTouchEvent code and remove the line
* Selection.removeSelection(buffer);
* which deselects all text when no link was found.
*/
public class EnhancedLinkMovementMethod extends ArrowKeyMovementMethod {
private static EnhancedLinkMovementMethod sInstance;
private static Rect sLineBounds = new Rect();
public static MovementMethod getInstance() {
if (sInstance == null) {
sInstance = new EnhancedLinkMovementMethod();
}
return sInstance;
}
@Override
public boolean onTouchEvent(TextView widget,Spannable buffer,MotionEvent event) {
int action = event.getAction();
if (action == MotionEvent.ACTION_UP || action == MotionEvent.ACTION_DOWN) {
int index = getCharIndexAt(widget,event);
if (index != -1) {
ClickableSpan[] link = buffer.getSpans(index,index,ClickableSpan.class);
if (link.length != 0) {
if (action == MotionEvent.ACTION_UP) {
link[0].onClick(widget);
}
else if (action == MotionEvent.ACTION_DOWN) {
Selection.setSelection(buffer,buffer.getSpanStart(link[0]),buffer.getSpanEnd(link[0]));
}
return true;
}
}
/*else {
Selection.removeSelection(buffer);
}*/
}
return super.onTouchEvent(widget,buffer,event);
}
private int getCharIndexAt(TextView textView,MotionEvent event) {
// get coordinates
int x = (int) event.getX();
int y = (int) event.getY();
x -= textView.getTotalPaddingLeft();
y -= textView.getTotalPaddingTop();
x += textView.getScrollX();
y += textView.getScrollY();
/*
* fail-fast check of the line bound.
* If we're not within the line bound no character was touched
*/
Layout layout = textView.getLayout();
int line = layout.getLineForVertical(y);
synchronized (sLineBounds) {
layout.getLineBounds(line,sLineBounds);
if (! sLineBounds.contains(x,y)) {
return -1;
}
}
// retrieve line text
Spanned text = (Spanned) textView.getText();
int lineStart = layout.getLineStart(line);
int lineEnd = layout.getLineEnd(line);
int lineLength = lineEnd - lineStart;
if (lineLength == 0) {
return -1;
}
Spanned lineText = (Spanned) text.subSequence(lineStart,lineEnd);
// compute leading margin and subtract it from the x coordinate
int margin = 0;
LeadingMarginSpan[] marginSpans = lineText.getSpans(0,lineLength,LeadingMarginSpan.class);
if (marginSpans != null) {
for (LeadingMarginSpan span : marginSpans) {
margin += span.getLeadingMargin(true);
}
}
x -= margin;
// retrieve text widths
float[] widths = new float[lineLength];
TextPaint paint = textView.getPaint();
paint.getTextWidths(lineText,widths);
// scale text widths by relative font size (absolute size / default size)
final float defaultSize = textView.getTextSize();
float scaleFactor = 1f;
AbsoluteSizeSpan[] absSpans = lineText.getSpans(0,AbsoluteSizeSpan.class);
if (absSpans != null) {
for (AbsoluteSizeSpan span : absSpans) {
int spanStart = lineText.getSpanStart(span);
int spanEnd = lineText.getSpanEnd(span);
scaleFactor = span.getSize() / defaultSize;
int start = Math.max(lineStart,spanStart);
int end = Math.min(lineEnd,spanEnd);
for (int i = start; i < end; i++) {
widths[i] *= scaleFactor;
}
}
}
// find index of touched character
float startChar = 0;
float endChar = 0;
for (int i = 0; i < lineLength; i++) {
startChar = endChar;
endChar += widths[i];
if (endChar >= x) {
// which "end" is closer to x,the start or the end of the character?
int index = lineStart + (x - startChar < endChar - x ? i : i + 1);
//Logger.e(Logger.LOG_TAG,"Found character: " + (text.length()>index ? text.charAt(index) : ""));
return index;
}
}
return -1;
}
}
完成活动代码
以下是我使用的完整示例活动代码.它应该完全符合你想要的它使用我的EnhandedMovementMethod,但您可以使用一个简单的LinkMovementMethod(具有前面提到的缺点).
public class LinkTestActivity extends Activity {
private WebView mWebView;
@SuppressLint("SetJavaScriptEnabled")
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mWebView = (WebView) findViewById(R.id.webView);
TextView tv = (TextView) findViewById(R.id.textView);
String text = "These are some sample links:\nwww.google.com\nwww.facebook.com\nwww.yahoo.com";
// Linkify the TextView
Spannable spannable = new SpannableString( Html.fromHtml(text) );
Linkify.addLinks(spannable,Linkify.WEB_URLS);
// Replace each URLSpan by a LinkSpan
URLSpan[] spans = spannable.getSpans(0,URLSpan.class);
for (URLSpan urlSpan : spans) {
LinkSpan linkSpan = new LinkSpan(urlSpan.getURL());
int spanStart = spannable.getSpanStart(urlSpan);
int spanEnd = spannable.getSpanEnd(urlSpan);
spannable.setSpan(linkSpan,Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
spannable.removeSpan(urlSpan);
}
// Make sure the TextView supports clicking on Links
tv.setMovementMethod(EnhancedLinkMovementMethod.getInstance());
tv.setText(spannable,BufferType.SPANNABLE);
// Make sure we handle clicked links ourselves
mWebView.setWebViewClient(new WebViewClient() {
@Override
public boolean shouldOverrideUrlLoading(WebView view,String url) {
// we handle the url ourselves if it's a network url (http / https)
return ! URLUtil.isNetworkUrl(url);
}
});
mWebView.getSettings().setJavaScriptEnabled(true);
mWebView.getSettings().setSupportZoom(true);
mWebView.getSettings().setBuiltInZoomControls(true);
}
private class LinkSpan extends URLSpan {
private LinkSpan(String url) {
super(url);
}
@Override
public void onClick(View view) {
String url = getURL();
if (mWebView != null && url != null) {
mWebView.loadUrl(url);
}
}
}
}
