Android 设置完autoLink属性后自定义跳转到指定界面
在TextView 中设置autoLink 属性可以自动识别Web URL,电话号码，电子邮件地址添加下划线改变字体颜色并实现点击事件，支持自动识别的类型：
android:autoLink=“web” 匹配Web URL。
android:autoLink=“phone” 匹配电话号码
android:autoLink=“email” 匹配电子邮件地址
android:autoLink=“map” 匹配地理位置
android:autoLink=“all” 匹配所有可用的模式
android:autoLink=“none” 不匹配任何类型
也可以类似这样的设置 android:autoLink=“web|phone” 表示匹配web URL 和手机号
上面的属性也可以通过java 代码的形式对TextView 设置
setAutoLinkMask(int mask) 进行设置
设置的参数分别是：
Linkify.WEB_URLS 匹配Web UR
Linkify.PHONE_NUMBERS 匹配电话号码
Linkify.EMAIL_ADDRESSES 匹配电子邮件地址
Linkify.MAP_ADDRESSES 地理位置匹配
Linkify.ALL 匹配所有可用的模式
设置完antoLink属性，点击TextView中的链接时会跳转的对应的界面，比如点击网页的链接会跳转到系统的默认的浏览器界面，点击手机号会进入拨打电话界面，但是这都是系统默认的，我们可不可以进行拦截处理，跳转到我们指定的界面呢，当然是可以的。下面是我的拦截处理的方法。
继承 MovementMethod ，这里我们先看一下MovementMethod的源码，它的源码比较少
public class LinkMovementMethod extends ScrollingMovementMethod {
private static final int CLICK = 1;
private static final int UP = 2;
private static final int DOWN = 3;
@Override
public boolean canSelectArbitrarily() {
return true;
}
@Override
protected boolean handleMovementKey(TextView widget, Spannable buffer, int keyCode,
int movementMetaState, KeyEvent event) {
switch (keyCode) {
case KeyEvent.KEYCODE_DPAD_CENTER:
case KeyEvent.KEYCODE_ENTER:
if (KeyEvent.metaStateHasNoModifiers(movementMetaState)) {
if (event.getAction() == KeyEvent.ACTION_DOWN &&
event.getRepeatCount() == 0 && action(CLICK, widget, buffer)) {
return true;
}
}
break;
}
return super.handleMovementKey(widget, buffer, keyCode, movementMetaState, event);
}
@Override
protected boolean up(TextView widget, Spannable buffer) {
if (action(UP, widget, buffer)) {
return true;
}
return super.up(widget, buffer);
}
@Override
protected boolean down(TextView widget, Spannable buffer) {
if (action(DOWN, widget, buffer)) {
return true;
}
return super.down(widget, buffer);
}
@Override
protected boolean left(TextView widget, Spannable buffer) {
if (action(UP, widget, buffer)) {
return true;
}
return super.left(widget, buffer);
}
@Override
protected boolean right(TextView widget, Spannable buffer) {
if (action(DOWN, widget, buffer)) {
return true;
}
return super.right(widget, buffer);
}
private boolean action(int what, TextView widget, Spannable buffer) {
Layout layout = widget.getLayout();
int padding = widget.getTotalPaddingTop() +
widget.getTotalPaddingBottom();
int areaTop = widget.getScrollY();
int areaBot = areaTop + widget.getHeight() - padding;
int lineTop = layout.getLineForVertical(areaTop);
int lineBot = layout.getLineForVertical(areaBot);
int first = layout.getLineStart(lineTop);
int last = layout.getLineEnd(lineBot);
ClickableSpan[] candidates = buffer.getSpans(first, last, ClickableSpan.class);
int a = Selection.getSelectionStart(buffer);
int b = Selection.getSelectionEnd(buffer);
int selStart = Math.min(a, b);
int selEnd = Math.max(a, b);
if (selStart < 0) {
if (buffer.getSpanStart(FROM_BELOW) >= 0) {
selStart = selEnd = buffer.length();
}
}
if (selStart > last)
selStart = selEnd = Integer.MAX_VALUE;
if (selEnd < first)
selStart = selEnd = -1;
switch (what) {
case CLICK:
if (selStart == selEnd) {
return false;
}
ClickableSpan[] link = buffer.getSpans(selStart, selEnd, ClickableSpan.class);
if (link.length != 1)
return false;
link[0].onClick(widget);
break;
case UP:
int bestStart, bestEnd;
bestStart = -1;
bestEnd = -1;
for (int i = 0; i < candidates.length; i++) {
int end = buffer.getSpanEnd(candidates[i]);
if (end < selEnd || selStart == selEnd) {
if (end > bestEnd) {
bestStart = buffer.getSpanStart(candidates[i]);
bestEnd = end;
}
}
}
if (bestStart >= 0) {
Selection.setSelection(buffer, bestEnd, bestStart);
return true;
}
break;
case DOWN:
bestStart = Integer.MAX_VALUE;
bestEnd = Integer.MAX_VALUE;
for (int i = 0; i < candidates.length; i++) {
int start = buffer.getSpanStart(candidates[i]);
if (start > selStart || selStart == selEnd) {
if (start < bestStart) {
bestStart = start;
bestEnd = buffer.getSpanEnd(candidates[i]);
}
}
}
if (bestEnd < Integer.MAX_VALUE) {
Selection.setSelection(buffer, bestStart, bestEnd);
return true;
}
break;
}
return false;
}
@Override
public boolean onTouchEvent(TextView widget, Spannable buffer,
MotionEvent event) {
int action = event.getAction();
if (action == MotionEvent.ACTION_UP || action == MotionEvent.ACTION_DOWN) {
int x = (int) event.getX();
int y = (int) event.getY();
x -= widget.getTotalPaddingLeft();
y -= widget.getTotalPaddingTop();
x += widget.getScrollX();
y += widget.getScrollY();
Layout layout = widget.getLayout();
int line = layout.getLineForVertical(y);
int off = layout.getOffsetForHorizontal(line, x);
ClickableSpan[] links = buffer.getSpans(off, off, ClickableSpan.class);
if (links.length != 0) {
if (action == MotionEvent.ACTION_UP) {
links[0].onClick(widget);
} else if (action == MotionEvent.ACTION_DOWN) {
Selection.setSelection(buffer,
buffer.getSpanStart(links[0]),
buffer.getSpanEnd(links[0]));
}
return true;
} else {
Selection.removeSelection(buffer);
}
}
return super.onTouchEvent(widget, buffer, event);
}
@Override
public void initialize(TextView widget, Spannable text) {
Selection.removeSelection(text);
text.removeSpan(FROM_BELOW);
}
@Override
public void onTakeFocus(TextView view, Spannable text, int dir) {
Selection.removeSelection(text);
if ((dir & View.FOCUS_BACKWARD) != 0) {
text.setSpan(FROM_BELOW, 0, 0, Spannable.SPAN_POINT_POINT);
} else {
text.removeSpan(FROM_BELOW);
}
}
public static MovementMethod getInstance() {
if (sInstance == null)
sInstance = new LinkMovementMethod();
return sInstance;
}
private static LinkMovementMethod sInstance;
private static Object FROM_BELOW = new NoCopySpan.Concrete();
}
在上面的这段代码中处理界面跳转的只有这一行 links[0].onClick(widget);我们要实现自己的跳转只要在自定义的LinkMovementMethod的这一行进行处理就行了。
先定义一个替换links[0].onClick(widget);的接口
public interface LinkClickListener {
/**
* true 表示要自己处理 false 使用系统默认
*
* @param mURL
* @return
*/
boolean onLinkClick(String mURL);
}
定义一个LinkMovementMethod的子类 LinkMovementMethodEx，在onTouchEvent方法中做了判断，在我们应用自己处理的情况，就不在走系统的默认处理，只有我们自己不处理的情况下才走系统的。
public class LinkMovementMethodEx extends LinkMovementMethod {
private LinkClickListener listener;
public LinkMovementMethodEx(LinkClickListener listener) {
this.listener = listener;
}
@Override
public boolean onTouchEvent(TextView widget, Spannable buffer, MotionEvent event) {
int action = event.getAction();
if (action == MotionEvent.ACTION_UP || action == MotionEvent.ACTION_DOWN) {
int x = (int) event.getX();
int y = (int) event.getY();
x -= widget.getTotalPaddingLeft();
y -= widget.getTotalPaddingTop();
x += widget.getScrollX();
y += widget.getScrollY();
Layout layout = widget.getLayout();
int line = layout.getLineForVertical(y);
int off = layout.getOffsetForHorizontal(line, x);
ClickableSpan[] links = buffer.getSpans(off, off, ClickableSpan.class);
if (links.length != 0) {
if (action == MotionEvent.ACTION_UP) {
if (links[0] instanceof URLSpan) {
URLSpan url = (URLSpan) links[0];
if (listener != null && listener.onLinkClick(url.getURL())) {
return true;
} else {
links[0].onClick(widget);
}
}
} else if (action == MotionEvent.ACTION_DOWN) {
Selection.setSelection(buffer,
buffer.getSpanStart(links[0]),
buffer.getSpanEnd(links[0]));
}
return true;
} else {
Selection.removeSelection(buffer);
}
}
return super.onTouchEvent(widget, buffer, event);
}
}
在项目中的引用
public class MainActivity extends Activity {
private String TAG = MainActivity.class.getSimpleName();
private TextView title;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
title = findViewById(R.id.tv_content);
title.setText(" 10086 中国移动的 这是百度的 https://www.baidu.com/");
title.setMovementMethod(new LinkMovementMethodEx(new LinkClickListener() {
@Override
public boolean onLinkClick(String mURL) {
//在这里执行直接的处理逻辑并将返回值设置为true
Log.i(TAG, "onLinkClick: " + mURL);
return false;
}
}));
}
}
源码地址 https://github.com/songdaren123/TextLink