Android pull refresh fixes. Sigh.

src/android/com/unprompted/tildefriends/MainActivity.java

@@ -26,7 +26,7 @@ import android.webkit.URLUtil;
 import android.webkit.ValueCallback;
 import android.webkit.WebChromeClient;
 import android.webkit.WebResourceRequest;
-import android.webkit.WebView;
+//import android.webkit.WebView;
 import android.webkit.WebViewClient;
 import android.widget.Button;
 import android.widget.TextView;
@@ -182,7 +182,6 @@ public class MainActivity extends Activity {
 		});
 
 		web_view.setWebChromeClient(new WebChromeClient() {
-			@Override
 			public boolean onJsConfirm(WebView view, String url, String message, final JsResult result) {
 				new AlertDialog.Builder(view.getContext())
 					.setTitle("Tilde Friends")
@@ -211,7 +210,6 @@ public class MainActivity extends Activity {
 			** https://stackoverflow.com/questions/8586691/how-to-open-file-save-dialog-in-android
 			*/
 
-			@Override
 			public boolean onShowFileChooser(WebView view, ValueCallback<Uri[]> message, WebChromeClient.FileChooserParams params) {
 				upload_message = message;
 				Intent intent = new Intent(Intent.ACTION_GET_CONTENT);
@@ -221,7 +219,6 @@ public class MainActivity extends Activity {
 				return true;
 			}
 
-			@Override
 			public boolean onConsoleMessage(android.webkit.ConsoleMessage consoleMessage) {
 				Log.d("tildefriends", consoleMessage.message() + " -- From line " + consoleMessage.lineNumber() + " of " + consoleMessage.sourceId());
 				return true;
@@ -229,7 +226,6 @@ public class MainActivity extends Activity {
 		});
 
 		web_view.setWebViewClient(new WebViewClient() {
-			@Override
 			public boolean shouldOverrideUrlLoading(WebView view, WebResourceRequest request)
 			{
 				if (request.getUrl() != null && request.getUrl().toString().startsWith(base_url)) {
@@ -304,10 +300,11 @@ public class MainActivity extends Activity {
 		switch (event.getActionMasked()) {
 		case MotionEvent.ACTION_DOWN:
 			touch_down_y = event.getY();
+			web_view.clearOverscrolledY();
 			break;
 		case MotionEvent.ACTION_MOVE:
 			{
-				float delta = event.getY() - touch_down_y;
+				float delta = web_view.getOverscrolledY() ? event.getY() - touch_down_y : 0.0f;
 				TextView refresh = (TextView)findViewById(R.id.refresh);
 				LayoutParams layout = refresh.getLayoutParams();
 				layout.height =
@@ -319,7 +316,7 @@ public class MainActivity extends Activity {
 			break;
 		case MotionEvent.ACTION_UP:
 			{
-				float delta = event.getY() - touch_down_y;
+				float delta = web_view.getOverscrolledY() ? event.getY() - touch_down_y : 0.0f;
 				if (delta > getWindow().getDecorView().getHeight() / 4) {
 					web_view.reload();
 				}

src/android/com/unprompted/tildefriends/WebView.java

@@ -0,0 +1,31 @@
+package com.unprompted.tildefriends;
+
+import android.content.Context;
+import android.util.AttributeSet;
+import android.util.Log;
+
+public class WebView extends android.webkit.WebView {
+	boolean overscrolledY = false;
+
+	public WebView(final Context context) {
+		super(context);
+	}
+
+	public WebView(final Context context, final AttributeSet attrs) {
+		super(context, attrs);
+	}
+
+	@Override
+	protected void onOverScrolled(int scrollX, int scrollY, boolean clampedX, boolean clampedY) {
+		super.onOverScrolled(scrollX, scrollY, clampedX, clampedY);
+		overscrolledY = true;
+	}
+
+	public boolean getOverscrolledY() {
+		return overscrolledY;
+	}
+
+	public void clearOverscrolledY() {
+		overscrolledY = false;
+	}
+}

src/android/res/layout/activity_main.xml

@@ -4,7 +4,7 @@
 	android:layout_width="match_parent"
 	android:layout_height="match_parent"
 	android:orientation="vertical">
-	<WebView
+	<com.unprompted.tildefriends.WebView
 		android:id="@+id/web"
 		android:layout_width="match_parent"
 		android:layout_height="match_parent"/>