1 files changed, 87 insertions, 0 deletions
diff --git a/setupwizardlib/src/main/java/com/android/setupwizardlib/span/LinkSpan.java b/setupwizardlib/src/main/java/com/android/setupwizardlib/span/LinkSpan.java
new file mode 100644
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+++ b/setupwizardlib/src/main/java/com/android/setupwizardlib/span/LinkSpan.java
@@ -0,0 +1,87 @@
+/*
+ * Copyright (C) 2016 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.setupwizardlib.span;
+
+import android.content.Context;
+import android.graphics.Typeface;
+import android.os.Build;
+import android.text.TextPaint;
+import android.text.style.ClickableSpan;
+import android.util.Log;
+import android.view.View;
+
+/**
+ * A clickable span that will listen for click events and send it back to the context. To use this
+ * class, implement {@link com.android.setupwizardlib.span.LinkSpan.OnClickListener} in your
+ * context (typically your Activity).
+ *
+ * <p />Note on accessibility: For TalkBack to be able to traverse and interact with the links, you
+ * should use {@code LinkAccessibilityHelper} in your {@code TextView} subclass. Optionally you can
+ * also use {@code RichTextView}, which includes link support.
+ */
+public class LinkSpan extends ClickableSpan {
+
+    /*
+     * Implementation note: When the orientation changes, TextView retains a reference to this span
+     * instead of writing it to a parcel (ClickableSpan is not Parcelable). If this class has any
+     * reference to the containing Activity (i.e. the activity context, or any views in the
+     * activity), it will cause memory leak.
+     */
+
+    /* static section */
+
+    private static final String TAG = "LinkSpan";
+
+    private static final Typeface TYPEFACE_MEDIUM =
+            Typeface.create("sans-serif-medium", Typeface.NORMAL);
+
+    public interface OnClickListener {
+        void onClick(LinkSpan span);
+    }
+
+    /* non-static section */
+
+    private final String mId;
+
+    public LinkSpan(String id) {
+        mId = id;
+    }
+
+    @Override
+    public void onClick(View view) {
+        final Context context = view.getContext();
+        if (context instanceof OnClickListener) {
+            ((OnClickListener) context).onClick(this);
+            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
+                view.cancelPendingInputEvents();
+            }
+        } else {
+            Log.w(TAG, "Dropping click event. No listener attached.");
+        }
+    }
+
+    @Override
+    public void updateDrawState(TextPaint drawState) {
+        super.updateDrawState(drawState);
+        drawState.setUnderlineText(false);
+        drawState.setTypeface(TYPEFACE_MEDIUM);
+    }
+
+    public String getId() {
+        return mId;
+    }
+}