Nanfeng

Notes on software development, code, and curious ideas

Cocos Creator Android Clipboard with TypeScript and Java Native Bridge

In
Bridge Cocos Creator TypeScript and Android Java through native reflection to copy text to the system clipboard, retrieve it, and handle empty results safely.

Copy-and-paste support in a native Android build requires a bridge between TypeScript and Java.

Java imports:

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import Android.content.ClipData;
import Android.content.ClipboardManager;
import Android.content.Context;

Copy text in AppActivity.java or an appropriate native helper:

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public static void copyToClipboard(String text) {
    ClipboardManager manager = (ClipboardManager) getActivity()
        .getApplicationContext().getSystemService(Context.CLIPBOARD_SERVICE);
    manager.setPrimaryClip(ClipData.newPlainText("Copied Text", text));
}

Read clipboard text:

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public static String getText() {
    ClipboardManager manager = (ClipboardManager) getActivity()
        .getApplicationContext().getSystemService(Context.CLIPBOARD_SERVICE);
    ClipData clip = manager.getPrimaryClip();
    if (clip != null && clip.getItemCount() > 0) {
        return clip.getItemAt(0).coerceToText(getActivity()).toString();
    }
    return null;
}

Call the getter through Cocos native reflection:

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const text = native.reflection.callStaticMethod(
  this._activityName,
  'getText',
  '()Ljava/lang/String;'
);

Only read clipboard contents in direct response to an appropriate user action and account for platform privacy restrictions.

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