edtScan.setText(result);
edtScan.onEditorAction(EditorInfo.IME_ACTION_NEXT);
场景：PDA都有扫描头，但有时想用自己的手机来扫码。于是给项目添加了相机使用Zbar识别二维码和条码的功能，
现在扫描头扫描到二维码或条码时是在PDA的扫描设置里加后缀（回车+换行）来实现输入框焦点跳转触发的。
相机识别二维码后需要模拟扫描头的扫描动作。不需要加回车换行，亲试无用，发现使用EditorInfo.IME_ACTION_NEXT，让输入框切换到下一个焦点即可。
edtScan.setOnEditorActionListener(new TextView.OnEditorActionListener() {
@Override
public boolean onEditorAction(TextView v, int actionId,
KeyEvent event) {
String scanertext = edtScan.getText().toString();
if (scanertext.contains("-") && scanertext.length() > 3) {
edtScan.setText("");
RefreshWebView(scanertext);
} else if (scanertext.length() > 0) {
edtScan.setText("");
String msg = "编码规则不符，请扫描位置二维码！";
Toast.makeText(HtmlViewActivity.this, msg,
Toast.LENGTH_SHORT).show();
MainActivity.getInstance().SpeakVoice(msg);
String head = "<head>"
+ "<meta name="viewport" content="width=device-width, initial-scale=1.0, user-scalable=no"> "
+ "<style>html{padding:15px;} body{word-wrap:break-word;font-size:13px;padding:0px;margin:0px} p{padding:0px;margin:0px;font-size:13px;color:#222222;line-height:1.3;} img{padding:0px,margin:0px;max-100%; auto; height:auto;}</style>"
+ "</head>";
webview.loadData("<html>" + head + "<body>"
+ " <h1>请扫描位置二维码！eg:A-R1:C1</h1> " + "</body></html>",
"text/html;charset=utf-8", "utf-8");
}
return true;
}
});
}