我尝试通过java script code in Android side更新信息。
在Android版本4.3上，它可以正常工作。
但是Android 4.4版本出现了这些错误，因此无法更新信息。
[INFO：CONSOLE（1）]“Uncaught TypeError：无法设置属性'value' null“，source：（1）I / chromium：[INFO：CONSOLE（1）]”Uncaught TypeError： 无法设置null的属性'value'，来源：（1）I / chromium： [INFO：CONSOLE（1）]“Uncaught TypeError：无法调用方法'submit' null“，来源：（1）
我知道从Android 4.4版开始，已经使用了新的Web View来支持，但我不知道主要问题在哪里。
知道如何通过Java脚本代码成功更新信息的人，即使在Android 4.4上，
请告诉我，
谢谢你，
p / s：代码
// Load Web View to update new SSID, Security Key, Security Mode
WebView mWv = new WebView(this);
// Simplest usage: note that an exception will NOT be thrown
// if there is an error loading this page (see below).
mWv.loadUrl("http://" + Constants.IP + "/cgi-bin/input");
mWv.getSettings().setJavaScriptEnabled(true);
mWv.getSettings().setDomStorageEnabled(true);
mWv.setWebChromeClient(new WebChromeClient());
mWv.setWebViewClient(new WebViewClient(){
public void onPageFinished(WebView mWv, String url) {
super.onPageFinished(mWv, url);
/**
* Pass parametes :
* - New SSID
* - New Security Key
* - Display raw picture
*/
// @"document.getElementsByName('%@')[0].value='%@'"
mWv.loadUrl("javascript:document.getElementById('wifi_ssid').value='" +
mEtSSID.getText().toString() + "'");
if (mEtSecurityKey.length() == 0
| Utils.checkValidatePassword(mEtSecurityKey, 8)) {
mWv.loadUrl("javascript:document.getElementById('wifi_key').value='" +
mEtSecurityKey.getText().toString() + "'");
if (mCbDisplayRawPicture.isChecked())
mWv.loadUrl(
"javascript:document.getElementById('displayraw').value='checked'");
else
mWv.loadUrl("javascript:document.getElementById('displayraw').value=''");
// @"document.forms['sendForm'].submit()"
mWv.loadUrl("javascript:document.getElementById('sendForm').submit()");
/**
* Also get new SSID and new Security Key in Card Setting page
*/
IS_BACK_FROM_CHANGE_SSID_AND_SCCURITY_KEY_TO_CARD_SETTING_PAGE = true;
/**
* Finish current Change SSID And Security Key after submit success
*/
finish();
} else
Toast.makeText(SettingAndReviewSettingPage.this,
getString(R.string.toast_your_password_is_case_sensitive),
Toast.LENGTH_SHORT).show();
}
public boolean shouldOverrideUrlLoading(WebView view, String url) {
view.loadUrl(url);
return true;
}
});
解
当我找到解决方案时，我感到很惊讶。我需要为Java脚本代码定义变量。喜欢以下代码＆amp;它奏效了。mWv.setWebViewClient(new WebViewClient(){
public void onPageFinished(WebView mWv, String url) {
super.onPageFinished(mWv, url);
/**
* Pass parametes :
* - New SSID
* - New Security Key
* - Display raw picture
*/
// @"document.getElementsByName('%@')[0].value='%@'"
mWv.loadUrl("javascript:var x = document.getElementById('wifi_ssid').value = '" +
mEtSSID.getText().toString() + "';");
// need check password is correct or not
// - empty or minimum has 8 characters.
// - have both character & number in typed password
if ((mEtSecurityKey.length() == 0
| Utils.checkValidatePassword(mEtSecurityKey, 8)
& Utils.checkValidatePassword(mEtSecurityKey.getText().toString()))) {
mWv.loadUrl("javascript:var y = document.getElementById('wifi_key').value = '" +
mEtSecurityKey.getText().toString() + "';");
if (mCbDisplayRawPicture.isChecked())
mWv.loadUrl("javascript:var z = document.getElementById('displayraw').value='checked'");
else
mWv.loadUrl("javascript:var z = document.getElementById('displayraw').value=''");
// @"document.forms['sendForm'].submit()"
// mWv.loadUrl("javascript:console.log('sendForm: '+document.getElementById('sendForm').value);");
mWv.loadUrl("javascript:document.getElementById('sendForm').submit()");
/**
* Also get new SSID and new Security Key in Card Setting page
*/
IS_BACK_FROM_CHANGE_SSID_AND_SCCURITY_KEY_TO_CARD_SETTING_PAGE = true;
/**
* Finish current Change SSID And Security Key after submit success
*/
finish();
} else
Toast.makeText(
ChangeSSIDAndPasswordPage.this,
getString(R.string.toast_your_password_is_case_sensitive),
Toast.LENGTH_SHORT).show();
}
public boolean shouldOverrideUrlLoading(WebView view, String url) {
view.loadUrl(url);
return true;
}
});
答案 0 :(得分：3)
简单的解决方案是确保WebView启用以下设置：
WebView webView = new WebView(this); // this is the context
webView.getSettings().setDomStorageEnabled(true);
这允许浏览器存储页面元素的DOM模型，以便Javascript可以对其执行操作。
提示：这仅适用于api 7.
答案 1 :(得分：3)
javascript:var x =＆amp;它奏效了。
mWv.setWebViewClient(new WebViewClient(){
public void onPageFinished(WebView mWv, String url) {
super.onPageFinished(mWv, url);
/**
* Pass parametes :
* - New SSID
* - New Security Key
* - Display raw picture
*/
// @"document.getElementsByName('%@')[0].value='%@'"
mWv.loadUrl("javascript:var x = document.getElementById('wifi_ssid').value = '" +
mEtSSID.getText().toString() + "';");
// need check password is correct or not
// - empty or minimum has 8 characters.
// - have both character & number in typed password
if ((mEtSecurityKey.length() == 0
| Utils.checkValidatePassword(mEtSecurityKey, 8)
& Utils.checkValidatePassword(mEtSecurityKey.getText().toString()))) {
mWv.loadUrl("javascript:var y = document.getElementById('wifi_key').value = '" +
mEtSecurityKey.getText().toString() + "';");
if (mCbDisplayRawPicture.isChecked())
mWv.loadUrl("javascript:var z = document.getElementById('displayraw').value='checked'");
else
mWv.loadUrl("javascript:var z = document.getElementById('displayraw').value=''");
// @"document.forms['sendForm'].submit()"
// mWv.loadUrl("javascript:console.log('sendForm: '+document.getElementById('sendForm').value);");
mWv.loadUrl("javascript:document.getElementById('sendForm').submit()");
/**
* Also get new SSID and new Security Key in Card Setting page
*/
IS_BACK_FROM_CHANGE_SSID_AND_SCCURITY_KEY_TO_CARD_SETTING_PAGE = true;
/**
* Finish current Change SSID And Security Key after submit success
*/
finish();
} else
Toast.makeText(
ChangeSSIDAndPasswordPage.this,
getString(R.string.toast_your_password_is_case_sensitive),
Toast.LENGTH_SHORT).show();
}
public boolean shouldOverrideUrlLoading(WebView view, String url) {
view.loadUrl(url);
return true;
}
});
答案 2 :(得分：0)
简单的解决方案：
wv.loadUrl("javascript:document.getElementById('xx').value='';void(0);");
要防止浏览器重定向到评估JavaScript附加void(0);
参考：void运算符