Input special characters in android WebView

Question

I want to type special characters (such as 'ä', 'é', '£', etc.) in an Android webview. These characters are not included into the virtual KCM (key characters map). So I can't retrieve the keycode associated to the character and create a KeyEvent.

I tried different methods:

String t = "testàaâäù"; char[] charArray = t.toCharArray(); if (charArray.length > 0) { KeyCharacterMap keyCharacterMap = KeyCharacterMap.load(KeyCharacterMap.VIRTUAL_KEYBOARD); KeyEvent[] events = keyCharacterMap.getEvents(charArray); } // events is null, because some characters aren't include in KCM // it never works in any case

With instrumentation methods:

instrumentation.sendStringSync("a"); // Display 'a' instrumentation.sendStringSync("àâä"); // Display nothing instrumentation.sendCharacterSync(KeyEvent.KEYCODE_H); // Display 'h' // Instrumentation seems to use KCM for data entry

With ACTION_MULTIPLE KeyEvent:

KeyEvent event = new KeyEvent(SystemClock.uptimeMillis(), String.valueOf("aàâä"), 0, 0); focusedView.dispatchKeyEvent(event); // Doesn't work with WebView, but works with other components such as EditText. // I get this error: Unimplemented WebView method onKeyMultiple called from: android.webkit.WebView.onKeyMultiple

Can I implement the method onKeyMultiple (WebView) to handle data entry? Is there a solution for inputting special characters in the webview? I need a solution that doesn't require root or the creation of a keyboard layout (user hasn't to select the keyboard).

manuel · Accepted Answer · 2016-07-27 08:18:57Z

I had the same problem when writing with the virtual keyboard on an input field inside a WebView. It would not recognize special characters like "á". What I did:

if (event.getAction() == KeyEvent.ACTION_MULTIPLE) { loadUrl("javascript:var prevText = document.activeElement.value;" + "var afterText = document.activeElement.value = prevText + \"" + event.getCharacters() + "\";"); return false; }

When the action is ACTION_MULTIPLE with Javascript I get the input field and I append the special character.

Here is the whole class:

public class CustomWebView extends WebView { public CustomWebView (Context context, AttributeSet attrs) { super(context, attrs); } @Override public InputConnection onCreateInputConnection(EditorInfo outAttrs) { ExtenderInputConnection connection = new ExtenderInputConnection(this, false); outAttrs.imeOptions = EditorInfo.IME_ACTION_SEARCH; return connection; } @Override public boolean dispatchKeyEvent(KeyEvent event) { if (event.getAction() == KeyEvent.ACTION_MULTIPLE) { loadUrl("javascript:var prevText = document.activeElement.value;" + "var afterText = document.activeElement.value = prevText + \"" + event.getCharacters() + "\";"); return false; } return super.dispatchKeyEvent(event); } public class ExtenderInputConnection extends BaseInputConnection implements InputConnection { public ExtenderInputConnection(View targetView, boolean fullEditor) { super(targetView, fullEditor); } @Override public boolean deleteSurroundingText(int beforeLength, int afterLength) { if (beforeLength == 1 && afterLength == 0) { // backspace return super.sendKeyEvent(new KeyEvent(KeyEvent.ACTION_DOWN, KeyEvent.KEYCODE_DEL)) && super.sendKeyEvent(new KeyEvent(KeyEvent.ACTION_UP, KeyEvent.KEYCODE_DEL)); } return super.deleteSurroundingText(beforeLength, afterLength); } } }

Hope it helps.

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