Develop Reference

How to fix and add contents on app before release to play store

I asked this but nobody answered. So I'm putting this up again.
I'm newbie to making app. I managed to complete but it wasn't completed when i did test on my phone. I didn't release my app, yet. I need to fix some things and i don't know how to make it. my app is web view app. I found some errors.
when I click 'back' button of my phone, app just shut down. -> I want it to go back page.
I have sharing icon and it works on computer but not in phone. -> I want it to be shared through the phone, too.
I need your help.

for first issue of back button:
In your Activity where you initiated webview
private WebView mWebView; // make accessible outside oncreate
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.youre_activity);
mWebView = (WebView) findViewById(R.id.webView); // in oncreate your webview
}
#Override
public boolean onKeyDown(int keyCode, KeyEvent event) { //// after oncreate override back key event
if (event.getAction() == KeyEvent.ACTION_DOWN) {
switch (keyCode) {
case KeyEvent.KEYCODE_BACK:
if (mWebView.canGoBack()) {
mWebView.goBack();
} else {
finish();
}
return true;
}
}
return super.onKeyDown(keyCode, event);
}
For Second issue of sharing you need to use andtoid sharing intent and trigger it from your webview. follow the tutorial below
https://paul.kinlan.me/sharing-natively-on-android-from-the-web/

Webview sometimes shows webpage not available

On all of my apps I am getting a "webpage not available" error. This has just been happening recently, even on apps that have not been updated in awhile. At first I thought it was my server or domain name. However, everything loads on a mobile browser or desktop browser. The strangest part is that I can click on the link for the website given by the error and it works. Also, this isn't every time I get into the app. It sometimes load without any problems at all.
This is my main activity:
public class MainActivity extends Activity {
private WebView mWebView;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// Allow third party cookies for Android Lollipop
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
mWebView = (WebView) findViewById(R.id.activity_main_webview);
CookieManager cookieManager = CookieManager.getInstance();
cookieManager.setAcceptThirdPartyCookies(mWebView,true);
}
mWebView = (WebView) findViewById(R.id.activity_main_webview);
mWebView.getSettings().setJavaScriptCanOpenWindowsAutomatically(true);
mWebView.getSettings().setAppCacheEnabled(true);
mWebView.getSettings().setDatabaseEnabled(true);
mWebView.getSettings().setDomStorageEnabled(true);
mWebView.loadUrl("http://www.google.com");
}
#Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
if ((keyCode == KeyEvent.KEYCODE_BACK) && this.mWebView.canGoBack()) {
this.mWebView.goBack();
return true;
}
return super.onKeyDown(keyCode, event);
}
}

You instantiated WebView twice that could be the reason.
cookieManager.setAcceptThirdPartyCookies(mWebView,true);
You don't need this one below, you've done it already.
mWebView = (WebView)findViewById(R.id.activity_main_webview);

WebView back history without redirects

I implemented android webview and onKeyDown method for back key. (It implements webview.goBack();)
My problem is exactly similar to the question in this post below (no answers there)
How to control the Android WebView history/back stack?
PROBLEM - When I press back button, webview selects the previous URL, but if that URL was actually a redirect, it goes into this vicious cycle/loop. If you look at chrome or stock browser it correctly handles the back without going back to the redirects.
How can this be solved?
Example: go to gap.com. Then select "My Gap Credit Card". This opens a redirect link and then the final page. Now when I click back, it never goes to Gap.com home page.
Any suggestions...
Additional Information: I did implement the shouldOverrideUrlLoading. If I remove that method, it seems to work fine but with this method it does not...

I've just tested this on jellybean and it seems to work.
Essentially, whenever a new URL is loaded in the WebView keep a copy of the url.
On the next URL request, double check they we aren't already on this page, if they are, then go back in the webview history another step.
Essentially this is relying on the url passed into the override step being the redirected url, rather than the final redirected url.
public class MainActivity extends Activity {
private Button mRefreshButton;
private WebView mWebView;
private String mCurrentUrl;
public void onCreate(Bundle savedInstance) {
super.onCreate(savedInstance);
setContentView(R.layout.main);
mWebView = (WebView) findViewById(R.id.webview);
mRefreshButton = (Button) findViewById(R.id.refresh);
mRefreshButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
mWebView.reload();
}
});
WebSettings webSettings = mWebView.getSettings();
webSettings.setJavaScriptEnabled(true);
mWebView.setWebViewClient(new WebViewClient() {
#Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
if(mCurrentUrl != null && url != null && url.equals(mCurrentUrl)) {
mWebView.goBack();
return true;
}
view.loadUrl(url);
mCurrentUrl = url;
return true;
}
});
mWebView.loadUrl("http://www.gap.com/");
}
#Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
if(event.getAction() == KeyEvent.ACTION_DOWN) {
switch(keyCode) {
case KeyEvent.KEYCODE_BACK:
if(mWebView.canGoBack()){
mWebView.goBack();
return true;
}
break;
}
}
return super.onKeyDown(keyCode, event);
}
}

I hope this answer if anyone is still looking for it.I had been hunting to fix similar issues in my project and had tried multiple approaches like using
- WebView.HitTestResult
- Pushing the urls into the list
- onKeyDown and so on...
I think most of it would work if your app consists of just webview. But my project had a combination of native and webview and handles some native schema.
Essentially found that the key is how you override the method shouldOverrideUrlLoading. Since i wanted my app to handles some of the urls and the webview to handle some of the other ones especially the back handling.I used a flag for back presses something like ..
#Override
public void onBackPressed() {
if (mWebView.canGoBack()) {
mClient.setIsBackPressed(true);
//mClient is an instance of the MyWebviewClient
mWebView.goBack();
} else {
super.onBackPressed();
}
}
public class MyWebviewClient extends WebViewClient {
private Boolean isBackPressed = false;
public void setIsBackPressed(Boolean isBackPressed) {
this.isBackPressed = isBackPressed;
}
#Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
if (isBackPressed){
return false;
}
else {
// handle the url by implementing your logic
return true;
}
}
#Override
public void onPageFinished(WebView view, String url) {
isBackPressed = false;
super.onPageFinished(view, url);
}
}
In this way, whenever there is a redirect when you click back, then it return false and hence mocks the behaviour of the webview. At the same time, you make sure that the isBackPressed is set to false after the page finishes loading.
Hope this helps !!

Get the WebView navigation event

I am working in an android application that can post tweets to twitter and I am doing it with the Web View widget. If the user is not logged in it will go to the login screen and if it a logged-in user in it will go to the tweet page. My requirement is after twetting from my application it should return to my application. How can I handle this situation by WebView. How will I get the redirect url from my WebView.
Please help me.
Please look into my code:
public class TestTwittershareActivity extends Activity {
WebView webview;
/** Called when the activity is first created. */
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
webview = (WebView) findViewById(R.id.webview);
webview.getSettings().setJavaScriptEnabled(true);
webview.loadUrl("http://www.twitter.com?status=");
webview.setWebViewClient(new HelloWebViewClient());
}
public boolean onKeyDown(int keyCode, KeyEvent event) {
if ((keyCode == KeyEvent.KEYCODE_BACK) && webview.canGoBack()) {
webview.goBack();
return true;
}
return super.onKeyDown(keyCode, event);
}
private class HelloWebViewClient extends WebViewClient {
#Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
view.loadUrl(url);
return true;
}
}
}

If I understand your problem correctly, you need a way to check whether the user is done with sending his tweets. Your best bet is to check the url that is being loaded in your webview. Hopefully, this url has some kind of indication that the tweet is done (maybe something in the status part?). To check the url you can use the HelloWebViewClient class you've already created and override it's onPageFinished method. e.g. something like this:
#Override
public void onPageFinished(WebView view, String url) {
super.onPageFinished(view, url);
if (url.contains("status=DONE")) {
// start your activity here
}
}
If you cannot detect based on the url that the user is finished, then things are much more complicated. In that case you can try to add a javascript that allows you to extract the html of the loaded page and you'll have to parse the html to look for clues if the user is done or not.

Youtube video cant start playing in webView Android

I need to display in webView in custom dialog.
Anyway, I can load youtube site, and navigate trought videos, but when I want to play some video and when I click play nothing happens. Video just get orange flash like it is selected, but doesnt start loading and playing. Whats the problem?
I found tutorial on net, and trying to modify it. Here is the code:
dialog = new Dialog(this);
dialog.setContentView(R.layout.dialog);
pd = (ProgressBar) dialog.findViewById(R.id.web_view_progress_bar);
webview = (WebView) dialog.findViewById(R.id.web_view);
webview.getSettings().setPluginState(PluginState.ON);
webview.getSettings().setJavaScriptEnabled(true);
webview.setWebChromeClient(new WebChromeClient() {
public void onProgressChanged(WebView view, int progress) {
if (progress < 100 && pd.getVisibility() == ProgressBar.GONE) {
pd.setVisibility(ProgressBar.VISIBLE);
}
pd.setProgress(progress);
if (progress == 100) {
pd.setVisibility(ProgressBar.GONE);
}
}
});
webview.setWebViewClient(new YoutubeWebViewClient());
//shouldOverrideUrlLoading(webview, this.getUrl());
webview.loadUrl(this.getUrl());
dialog.show();
}
#Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
if (keyCode == KeyEvent.KEYCODE_BACK && webview.canGoBack()) {
webview.goBack();
return true;
}
return super.onKeyDown(keyCode, event);
}
private class YoutubeWebViewClient extends WebViewClient {
#Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
view.loadUrl(url);
return true;
}
}
Help?
UPDATE:
I've tried this to do in other way, but again problems...
Im trying to embed youtube html5 player in webView. I only get back field without a youtube video. In right corner of webView is the youtube sign, and thats all of it. Dont have android phone, testing app on android x86 platform. is that a problem?
help :) dont care about a way of implementation, i just need this to work ^^

i dont know why but webviewclient class causes the problem , we can run it in default browser remove the webviewclient class and simly load the url of youtube you will be able to run it on 2.2 for 2.1 just use intent and through parse method open it through youtube application
startActivity(new Intent(Intent.ACTION_VIEW, Uri.parse(String.format("http://www.youtube.com/v/%s")))); }

this is a kind of bug in android webview as far as i found till now,for me what worked is simply added Hardware Accleration permission in manifest.after that video embedded in my webview started playing .