Copying data giving using getPrimaryClip() giving

问题:

I am getting { text/plain {NULL} } when I am using ClipData but if I use deprecated method mClipboard.getText() it is working just fine.

if (mClipboard.getPrimaryClipDescription().hasMimeType(ClipDescription.MIMETYPE_TEXT_PLAIN)) {
    ClipData clipData = mClipboard.getPrimaryClip();
    ClipData.Item item = clipData.getItemAt(0);
    Log.d(TAG, clipData.toString());
    Log.d(TAG, mClipboard.getText());
}

Update

Issue exists in Samsung galaxy Tab 3.

回答1:

The reason of your problem is unknown. since it works on a device which I tested on (S6 5.0). You may want to look at the implementation of deprecated getText() method:

public CharSequence getText() {
    ClipData clip = getPrimaryClip();
    if (clip != null && clip.getItemCount() > 0) {
        return clip.getItemAt(0).coerceToText(mContext);
    }
    return null;
}

In order to obtain the text It uses the method coerceToText() . according to description of this method:

     * Turn this item into text, regardless of the type of data it
     * actually contains.

Therefore , I presume the deprecation of method getText() is due to a performance concern or something else.

Anyway. Since method getText() uses API which is not deprecated, as a workaround you can use some part of the source of this method(specifically, method coerceToText() ) if calling recommended API returns null:

ClipboardManager mclipboard =(ClipboardManager) getSystemService(CLIPBOARD_SERVICE);
boolean isTextPlain = mclipboard.getPrimaryClip().getDescription().hasMimeType(ClipDescription.MIMETYPE_TEXT_PLAIN);
    CharSequence text = null;
if (isTextPlain){
    ClipData clipData = mclipboard.getPrimaryClip();
    ClipData.Item item = clipData.getItemAt(0);
    if (  item!= null ){
        text = item.getText();
        if (text == null){
            // taken from source of clipData.getText() method
            text =  item.coerceToText(this);
        }
    }
}