有没有一种方法可以使用javascript在WebView中隐藏按钮?(A2HS)按钮
我有一个WebView应用程序链接到我的店铺url,这里的问题是有一个按钮(添加到主屏幕)按钮,我想在我的WebView中隐藏该按钮类。我曾尝试在OnProgressChange方法中使用javascript隐藏该按钮,它可以工作,但是,当我单击类别按钮并按下主屏幕按钮或再次返回主屏幕时“添加到主屏幕按钮”再次出现。请有人帮助我或指导我如何完成此任务。有没有一种方法可以使用javascript在WebView中隐藏按钮?(A2HS)按钮,javascript,android,button,webview,Javascript,Android,Button,Webview,我有一个WebView应用程序链接到我的店铺url,这里的问题是有一个按钮(添加到主屏幕)按钮,我想在我的WebView中隐藏该按钮类。我曾尝试在OnProgressChange方法中使用javascript隐藏该按钮,它可以工作,但是,当我单击类别按钮并按下主屏幕按钮或再次返回主屏幕时“添加到主屏幕按钮”再次出现。请有人帮助我或指导我如何完成此任务。 //WebView设置和配置 Wview=(WebView)findviewbyd(R.id.WebView); WebSettings We
//WebView设置和配置
Wview=(WebView)findviewbyd(R.id.WebView);
WebSettings WebSettings=Wview.getSettings();
setJavaScriptEnabled(true);
setWebChromeClient(新的chromeClient());
setWebViewClient(新的myClient());
setJavaScriptCanOpenWindowsAutomatically(true);
Wview.loadUrl(homeUrl);
}
私有类myClient扩展了WebViewClient{
@凌驾
public void onPageStarted(WebView视图、字符串url、位图favicon){
super.onPageStarted(视图、url、favicon);
}
@可空
@凌驾
公共WebResourceResponse应InterceptRequest(WebView视图,字符串url){
返回super.shouldInterceptRequest(视图,url);
}
@凌驾
公共布尔值shouldOverrideUrlLoading(WebView视图,字符串url){
布尔值a=真;
if(url!=null&&url.startsWith(“whatsapp”)){
view.getContext().startActivity(新的意图(Intent.ACTION_视图,Uri.parse(url));
返回true;
}
else if(url.startsWith(“电话:”)){
Intent Intent=新的Intent(Intent.ACTION\u拨号,Uri.parse(url));
星触觉(意向);
}
else if(url.startsWith(“rate:”)){
最后一个字符串app_package=getPackageName();//从上下文或活动对象请求应用程序包名称
试一试{
startActivity(新意图(Intent.ACTION_视图,Uri.parse(“market://details?id=“+app_包”);
}捕获(ActivityNotFoundException anfe){
startActivity(新意图(Intent.ACTION_视图,Uri.parse(“https://play.google.com/store/apps/details?id=“+app_包”);
}
}
else if(url.startsWith(“共享:”)){
意向意向=新意向(意向.行动\发送);
intent.setType(“文本/普通”);
intent.putExtra(intent.EXTRA_主题,view.getTitle());
intent.putExtra(intent.EXTRA_TEXT,view.getTitle()+“\nVisit:”+(Uri.parse(url.toString()).replace(“share:”,”);
startActivity(Intent.createChooser(Intent,getString(R.string.share_w_friends));
}
else if(url.startsWith(“退出:”){
exitApp();
}//在android默认web浏览器中打开外部URL
else if(ext_url&&!hostname(url).equals(homeUrl)){
Wview(url、true、wError_计数器);
//否则返回false,表示没有特殊操作
}否则{
a=假;
}
返回a;
}
@凌驾
公共void onPageFinished(WebView视图,字符串url){
如果(!发生错误){
findviewbyd(R.id.welcome).setVisibility(View.GONE);
findViewById(R.id.webView).setVisibility(View.VISIBLE);
}
super.onPageFinished(视图、url);
}
@凌驾
接收到的公共void Dhttperror(WebView视图、WebResourceRequest请求、WebResourceResponse errorResponse){
super.onReceivedHttPeror(查看、请求、错误响应);
}
@凌驾
接收错误时公共无效(WebView视图、WebResourceRequest请求、WebResourceError错误){
ErrorOccursed=true;
findviewbyd(R.id.webView).setVisibility(View.go);
findviewbyd(R.id.welcome).setVisibility(View.VISIBLE);
//Intent Intent=新的Intent(getApplicationContext(),ErrorActivity.class);
//星触觉(意向);
}
}
//随机ID创建函数,可在每次重新加载webview时帮助获取新缓存
公共字符串随机_id(){
返回新的BigInteger(130,随机).toString(32);
}
//使用请求打开webview内的URL
void Wview(字符串url、布尔选项卡、int错误\u计数器){
如果(错误\u计数器>2){
wError_计数器=0;
exitApp();
}否则{
如果(选项卡){
如果(cTAB){
customtabsinent.Builder intentBuilder=新建customtabsinent.Builder();
intentBuilder.setToolbarColor(ContextCompat.getColor(this,R.color.colorPrimary));
setSecondaryToolbarColor(ContextCompat.getColor(this,R.color.colorPrimaryDark));
intentBuilder.setStartAnimations(这个,android.R.anim.slide\u在左,android.R.anim.slide\u在右);
intentBuilder.setExitAnimations(这个,android.R.anim.slide\u在左,android.R.anim.slide\u在右);
CustomTabsInt CustomTabsInt=intentBuilder.build();
试一试{
customtabsinent.launchUrl(MainActivity.this,Uri.parse(url));
}捕获(ActivityNotFounde异常){
意向意向=新意向(意向.行动\视图);
setData(Uri.parse(url));
星触觉(意向);
}
}否则{
意向意向=新意向(意向.行动\视图);
setData(Uri.parse(url));
星触觉(意向);
}
}否则{
if(url.contains(“?”){//检查url是否已经有查询参数并进行了适当的处理。
url+=“&”;
}否则{
url+=“?”;
}
url+=“rid=“+random_id();
Wview.loadUrl(url);
}
}
}
//获取主机名
公共静态字符串主机名(字符串url){
if(url==null | | url.length()==0){
返回“”;
}
int dslash=url.indexOf(“/”);
如果(dslash==-1){
dslash=0;
}否则{
//WebView Settings and Configuration
Wview = (WebView) findViewById(R.id.webView);
WebSettings webSettings = Wview.getSettings();
webSettings.setJavaScriptEnabled(true);
Wview.setWebChromeClient(new chromeClient());
Wview.setWebViewClient(new myClient());
webSettings.setJavaScriptCanOpenWindowsAutomatically(true);
Wview.loadUrl(homeUrl);
}
private class myClient extends WebViewClient {
@Override
public void onPageStarted(WebView view, String url, Bitmap favicon) {
super.onPageStarted(view, url, favicon);
}
@Nullable
@Override
public WebResourceResponse shouldInterceptRequest(WebView view, String url) {
return super.shouldInterceptRequest(view, url);
}
@Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
boolean a = true;
if (url !=null && url.startsWith("whatsapp")){
view.getContext().startActivity(new Intent(Intent.ACTION_VIEW,Uri.parse(url)));
return true;
}
else if (url.startsWith("tel:")) {
Intent intent = new Intent(Intent.ACTION_DIAL, Uri.parse(url));
startActivity(intent);
}
else if (url.startsWith("rate:")) {
final String app_package = getPackageName(); //requesting app package name from Context or Activity object
try {
startActivity(new Intent(Intent.ACTION_VIEW, Uri.parse("market://details?id=" + app_package)));
} catch (ActivityNotFoundException anfe) {
startActivity(new Intent(Intent.ACTION_VIEW, Uri.parse("https://play.google.com/store/apps/details?id=" + app_package)));
}
}
else if (url.startsWith("share:")) {
Intent intent = new Intent(Intent.ACTION_SEND);
intent.setType("text/plain");
intent.putExtra(Intent.EXTRA_SUBJECT, view.getTitle());
intent.putExtra(Intent.EXTRA_TEXT, view.getTitle()+"\nVisit: "+(Uri.parse(url).toString()).replace("share:",""));
startActivity(Intent.createChooser(intent, getString(R.string.share_w_friends)));
}
else if (url.startsWith("exit:")) {
exitApp();
}// opening external URLs in android default web browser
else if (ext_url && !hostname(url).equals(homeUrl)) {
Wview(url,true, wError_counter);
// else return false for no special action
} else {
a = false;
}
return a;
}
@Override
public void onPageFinished(WebView view, String url) {
if(!errorOccured){
findViewById(R.id.welcome).setVisibility(View.GONE);
findViewById(R.id.webView).setVisibility(View.VISIBLE);
}
super.onPageFinished(view, url);
}
@Override
public void onReceivedHttpError(WebView view, WebResourceRequest request, WebResourceResponse errorResponse) {
super.onReceivedHttpError(view, request, errorResponse);
}
@Override
public void onReceivedError(WebView view, WebResourceRequest request, WebResourceError error) {
errorOccured=true;
findViewById(R.id.webView).setVisibility(View.GONE);
findViewById(R.id.welcome).setVisibility(View.VISIBLE);
//Intent intent = new Intent(getApplicationContext(), ErrorActivity.class);
// startActivity(intent);
}
}
//Random ID creation function to help get fresh cache every-time webview reloaded
public String random_id() {
return new BigInteger(130, random).toString(32);
}
//Opening URLs inside webview with request
void Wview(String url, Boolean tab, int error_counter) {
if(error_counter > 2){
wError_counter = 0;
exitApp();
}else {
if(tab){
if(cTAB) {
CustomTabsIntent.Builder intentBuilder = new CustomTabsIntent.Builder();
intentBuilder.setToolbarColor(ContextCompat.getColor(this, R.color.colorPrimary));
intentBuilder.setSecondaryToolbarColor(ContextCompat.getColor(this, R.color.colorPrimaryDark));
intentBuilder.setStartAnimations(this, android.R.anim.slide_in_left, android.R.anim.slide_out_right);
intentBuilder.setExitAnimations(this, android.R.anim.slide_in_left, android.R.anim.slide_out_right);
CustomTabsIntent customTabsIntent = intentBuilder.build();
try {
customTabsIntent.launchUrl(MainActivity.this, Uri.parse(url));
} catch (ActivityNotFoundException e) {
Intent intent = new Intent(Intent.ACTION_VIEW);
intent.setData(Uri.parse(url));
startActivity(intent);
}
}else{
Intent intent = new Intent(Intent.ACTION_VIEW);
intent.setData(Uri.parse(url));
startActivity(intent);
}
} else {
if (url.contains("?")) { // check to see whether the url already has query parameters and handle appropriately.
url += "&";
} else {
url += "?";
}
url += "rid=" + random_id();
Wview.loadUrl(url);
}
}
}
//Getting host name
public static String hostname(String url){
if (url == null || url.length() == 0) {
return "";
}
int dslash = url.indexOf("//");
if (dslash == -1) {
dslash = 0;
} else {
dslash += 2;
}
int end = url.indexOf('/', dslash);
end = end >= 0 ? end : url.length();
int port = url.indexOf(':', dslash);
end = (port > 0 && port < end) ? port : end;
Log.w("URL Host: ",url.substring(dslash, end));
return url.substring(dslash, end);
}
private void exitApp() {
Intent intent = new Intent(Intent.ACTION_MAIN);
intent.addCategory(Intent.CATEGORY_HOME);
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(intent);
}
// Creating exit dialogue
public void ask_exit(){
AlertDialog.Builder builder = new AlertDialog.Builder(MainActivity.this);
builder.setTitle(getString(R.string.exit_title));
builder.setMessage(getString(R.string.exit_subtitle));
builder.setCancelable(true);
// Action if user selects 'yes'
builder.setPositiveButton("Yes", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialogInterface, int i) {
finish();
}
});
// Actions if user selects 'no'
builder.setNegativeButton("No", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialogInterface, int i) {
}
});
// Create the alert dialog using alert dialog builder
AlertDialog dialog = builder.create();
// display the dialog when user press back button
dialog.show();
}
@Override
public void onBackPressed() {
if (Wview.canGoBack()) {
Wview.goBack();
} else if (ask_ExitDial) {
ask_exit();
} else {
super.onBackPressed();
this.finish();
}
}
private class chromeClient extends WebChromeClient {
@Override
public void onProgressChanged(WebView view, int newProgress) {
Wview.loadUrl("javascript:(function() { " +
"document.getElementsByClassName('sc-iQKALj cdqULD border border-gray-dae')[0].style.display='none'; " +
"})()");
super.onProgressChanged(view, newProgress);
}
}
private class touchlistener implements View.OnTouchListener {
@Override
public boolean onTouch(View view, MotionEvent motionEvent) {
WebView.HitTestResult hitTestResult=((WebView)view).getHitTestResult();
hitResult=true;
return false;
}
}
}
private class myClient extends WebViewClient {
...
@Nullable
@Override
public WebResourceResponse shouldInterceptRequest(WebView view, String url) {
Wview.evaluateJavascript("javascript:(function() { " +
"document.getElementsByClassName('sc-iQKALj cdqULD border border-gray-dae')[0].style.display='none'; " +
"})()");
return super.shouldInterceptRequest(view, url);
}
...
}
public void onBackPressed() {
if (Wview.canGoBack()) {
Wview.goBack();
Wview.evaluateJavascript("javascript:(function() { " +
"document.getElementsByClassName('sc-iQKALj cdqULD border border-gray-dae')[0].style.display='none'; " +
"})()");
} else if (ask_ExitDial) {
ask_exit();
} else {
super.onBackPressed();
this.finish();
}
}
Wview.setOnKeyListener((View.OnKeyListener) (v, keyCode, event) -> {
if (event.getAction() != KeyEvent.ACTION_DOWN)
return true;
if (keyCode == KeyEvent.KEYCODE_BACK) {
if (Wview.canGoBack()) {
Wview.goBack();
Wview.evaluateJavascript("javascript:(function() { " +
"document.getElementsByClassName('sc-iQKALj cdqULD border border-gray-dae')[0].style.display='none'; " +
"})()");
} else {
((Activity) this).onBackPressed();
}
return true;
}
return false;
});