开启webview文本选择

您可以使用以下代码在webview中开启文本选择功能：

webView.setOnLongClickListener(new View.OnLongClickListener() {
    @Override
    public boolean onLongClick(View v) {
        final WebView.HitTestResult result = webView.getHitTestResult();
        if (result.getType() == WebView.HitTestResult.UNKNOWN_TYPE) {
            return false;
        }
        if (result.getType() == WebView.HitTestResult.EDIT_TEXT_TYPE) {
            return true;
        }
        AlertDialog.Builder builder = new AlertDialog.Builder(MainActivity.this);
        builder.setItems(new CharSequence[]{"复制链接地址", "分享链接地址", "复制链接文字"}, new DialogInterface.OnClickListener() {
            @Override
            public void onClick(DialogInterface dialog, int which) {
                switch (which) {
                    case 0:
                        ClipboardManager cm = (ClipboardManager) getSystemService(Context.CLIPBOARD_SERVICE);
                        cm.setPrimaryClip(ClipData.newPlainText(null, result.getExtra()));
                        Toast.makeText(MainActivity.this, "已复制链接地址", Toast.LENGTH_SHORT).show();
                        break;
                    case 1:
                        Intent shareIntent = new Intent(Intent.ACTION_SEND);
                        shareIntent.setType("text/plain");
                        shareIntent.putExtra(Intent.EXTRA_TEXT, result.getExtra());
                        shareIntent = Intent.createChooser(shareIntent, "分享链接地址");
                        startActivity(shareIntent);
                        break;
                    case 2:
                        ClipboardManager cm2 = (ClipboardManager) getSystemService(Context.CLIPBOARD_SERVICE);
                        cm2.setPrimaryClip(ClipData.newPlainText(null, result.getExtra()));
                        Toast.makeText(MainActivity.this, "已复制链接文字", Toast.LENGTH_SHORT).show();
                        break;
                }
            }
        });
        builder.show();
        return true;
    }
});

这段代码将在长按webview时弹出一个对话框，其中包含复制链接地址、分享链接地址和复制链接文字等选项。您可以根据需要进行修改和扩展。