My webview module isn't working. Whenever I try to navigate back from any webpage, the app crashes giving following error
"Unfortunately the app has stopped".
Can anyone please explain what is the reason?
public class MainActivity extends ActionBarActivity {
WebView myWebView;
#Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
WebView mainWebView = (WebView) findViewById(R.id.mainWebView);
WebSettings webSettings = mainWebView.getSettings();
webSettings.setJavaScriptEnabled(true);
mainWebView.setWebViewClient(new MyCustomWebViewClient());
mainWebView.setScrollBarStyle(View.SCROLLBARS_INSIDE_OVERLAY);
mainWebView.loadUrl("http://nahdaschools.com/v4/index.php/apps");
}
private class MyCustomWebViewClient extends WebViewClient
{
#Override
public boolean shouldOverrideUrlLoading(WebView view, String url)
{
view.loadUrl(url);
return true;
}
}
#Override
public void onBackPressed() {
if (myWebView.copyBackForwardList().getCurrentIndex() > 0) {
myWebView.goBack();
}
else {
// Your exit alert code, or alternatively line below to finish
super.onBackPressed(); // finishes activity
}
}}
#Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
if(event.getAction() == KeyEvent.ACTION_DOWN){
switch(keyCode)
{
case KeyEvent.KEYCODE_BACK:
if(myWebView.canGoBack()){
myWebView.goBack();
}
else{
finish();
}
return true;
}
}
return super.onKeyDown(keyCode, event);
}
with this you will be able to come on your last activity.
#Override
public void onBackPressed() {
super.onBackPressed();
moveTaskToBack(false);// finishes activity
}
}}
Related
This question already has answers here:
Unfortunately MyApp has stopped. How can I solve this?
(23 answers)
What is a NullPointerException, and how do I fix it?
(12 answers)
Closed 3 years ago.
I am trying to add a WebViewClient to my WebView application. But every time I try to start it with WebViewClient, it stops working.
MainActivity.java
public class MainActivity extends AppCompatActivity {
private WebView myWebView;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
MyWebViewClient webViewClient = new MyWebViewClient(this);
myWebView.setWebViewClient(webViewClient);
myWebView = findViewById(R.id.webview);
myWebView.loadUrl("https://www.google.com.br/");
WebSettings webSettings = myWebView.getSettings();
webSettings.setJavaScriptEnabled(true);
}
#Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
if ((keyCode == KeyEvent.KEYCODE_BACK) && myWebView.canGoBack()) {
myWebView.goBack();
return true;
}
return super.onKeyDown(keyCode, event);
}
}
MyWebViewClient.java
public class MyWebViewClient extends WebViewClient {
private Activity activity = null;
public MyWebViewClient(Activity activity) {
this.activity = activity;
}
#Override
public boolean shouldOverrideUrlLoading(WebView webView, String url) {
if(url.contains("https://google.com/")) return false;
Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse(url));
activity.startActivity(intent);
return true;
}
}
When I comment the line myWebView.setWebViewClient(webViewClient); in the MainActivity.java the application works again. Any ideas on how to solve this WebVIewClient problem?
Here you go, you are setting the client on myWebView before its
initialization.
public class MainActivity extends AppCompatActivity {
private WebView myWebView;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
//should be initialized first
myWebView = findViewById(R.id.webview);
MyWebViewClient webViewClient = new MyWebViewClient(this);
myWebView.setWebViewClient(webViewClient);
myWebView.loadUrl("https://www.google.com.br/");
WebSettings webSettings = myWebView.getSettings();
webSettings.setJavaScriptEnabled(true);
}
#Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
if ((keyCode == KeyEvent.KEYCODE_BACK) && myWebView.canGoBack()) {
myWebView.goBack();
return true;
}
return super.onKeyDown(keyCode, event);
}
}
I would like to be able to upload a file from an Android 4.x device, whenever I select "choose file" nothing happens.
It works when I use Chrome directly but not with the WebViewClient from within the app.
My code:
public class ActivityWebView extends MainActivity {
private WebView wv;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_webview);
String websiteURL = "url";
wv = (WebView) findViewById(R.id.webView);
wv.getSettings().setJavaScriptEnabled(true);
wv.loadUrl(websiteURL);
wv.setWebViewClient(new WebViewClientClass());
wv.getSettings().setSupportZoom(false);
wv.getSettings().setBuiltInZoomControls(false);
}
public class WebViewClientClass extends WebViewClient {
#Override
public boolean shouldOverrideUrlLoading(WebView webview, String url)
{
webview.loadUrl(url);
return true;
}
}
#Override
public boolean onKeyDown(int KeyCode, KeyEvent event)
{
if ((KeyCode == KeyEvent.KEYCODE_BACK) && wv.canGoBack())
{
wv.goBack();
return true;
}
return super.onKeyDown(KeyCode, event);
}
WebView is not showing website correctly. Any help would be great!
The code ive used work on all another site. Not sure whats the issue. Any thing I should add? Works well in chrome and other browsers so don't know what to do. Any help would be great!
WebView
Chrome
public class Website extends Activity {
WebView myWebView;
LinearLayout root;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.website);
myWebView = (WebView) findViewById(R.id.webView);
myWebView.loadUrl("http://dspart.org");
root = (LinearLayout) findViewById(R.id.root);
WebSettings webSettings = myWebView.getSettings();
webSettings.setJavaScriptEnabled(true);
myWebView.addJavascriptInterface(new WebAppInterface(this), "Android");
myWebView.setWebViewClient(new WebViewClient());
myWebView.getSettings().setBuiltInZoomControls(true);
myWebView.getSettings().setSupportZoom(true);
myWebView.getSettings().setUseWideViewPort(true);
myWebView.getSettings().setLoadWithOverviewMode(true);
getActionBar().setDisplayHomeAsUpEnabled(true);
}
public class WebAppInterface {
Context mContext;
/** Instantiate the interface and set the context */
WebAppInterface(Context c) {
mContext = c;
}
/** Show a toast from the web page */
#JavascriptInterface
public void showToast(String toast) {
Toast.makeText(mContext, toast, Toast.LENGTH_SHORT).show();
}
private class MyWebViewClient extends WebViewClient {
#Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
if (Uri.parse(url).getHost().equals("http://dspart.org")) {
// This is my web site, so do not override; let my WebView load the page
return false;
}
// Otherwise, the link is not for a page on my site, so launch another Activity that handles URLs
Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse(url));
startActivity(intent);
return true;
}
}
}
#Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
if(event.getAction() == KeyEvent.ACTION_DOWN){
switch(keyCode) {
case KeyEvent.KEYCODE_BACK:
if(myWebView.canGoBack()) {
myWebView.goBack();
}
else {
root.removeView(myWebView);
myWebView.removeAllViews();
myWebView.destroy();
this.finish();
}
return true;
}
}
return super.onKeyDown(keyCode, event);
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case android.R.id.home:
NavUtils.navigateUpFromSameTask(this);
root.removeView(myWebView);
myWebView.removeAllViews();
myWebView.destroy();
this.finish();
return true;
default:
return super.onOptionsItemSelected(item);
}
}}
YourWebView.getSettings().setJavaScriptEnabled(true);
try enabling javascript on your webview! code snippet above :
Seems like there is an error in the following line
if (Uri.parse(url).getHost().equals("http://dspart.org"))
getHost will return dspart.org and not the url with http. Try after modifying it. Thanks
Refer - http://developer.android.com/reference/android/net/Uri.html#getHost()
I would like to find a solution to allow my WebView still alive when screen time-out.
I am program to play music using WebView, it's working very properly if the screen alive but when the screen time-out my music in WebView also GONE.
Here is my code:
public class WebViewActivity extends Activity {
WebView mWebView;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.playlist);
mWebView = (WebView) findViewById(R.id.webView1);
mWebView.setWebViewClient(new HelloWebViewClient());
mWebView.getSettings().setJavaScriptEnabled(true);
mWebView.getSettings().setPluginsEnabled(true);
mWebView.getSettings().setAllowFileAccess(true);
mWebView.loadUrl("http://mp3skull.com/usher.html");
}
private class HelloWebViewClient extends WebViewClient {
#Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
view.loadUrl(url);
return true;
}
}
#Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
if ((keyCode == KeyEvent.KEYCODE_BACK) && mWebView.canGoBack()) {
mWebView.goBack();
return true;
}
return super.onKeyDown(keyCode, event);
}
#Override
public void onPause()
{
mWebView.setVisibility(View.GONE);
mWebView.destroy();
super.onPause();
}
}
I am very shy to tell you that i tried to find this solution over a week but still can't done :(.
Hope you give me solution on this matter.
Thanks you.
Remove onPause() method in your class like below code:
public class WebViewActivity extends Activity {
WebView mWebView;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.playlist);
mWebView = (WebView) findViewById(R.id.webView1);
mWebView.setWebViewClient(new HelloWebViewClient());
mWebView.getSettings().setJavaScriptEnabled(true);
mWebView.getSettings().setPluginsEnabled(true);
mWebView.getSettings().setAllowFileAccess(true);
mWebView.loadUrl("http://mp3skull.com/usher.html");
}
private class HelloWebViewClient extends WebViewClient {
#Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
view.loadUrl(url);
return true;
}
}
#Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
if ((keyCode == KeyEvent.KEYCODE_BACK) && mWebView.canGoBack()) {
mWebView.goBack();
return true;
}
return super.onKeyDown(keyCode, event);
}
}
I am programming that allow users can listen music in WebView via the URL web link.
But I wonder why when the android phone user screen Time-Out my music in WebView also stop.
Do you have any solution to solve this problem?
Here is my code:
public class PlayMusicActivity extends Activity {
WebView mWebView;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.playlist);
mWebView = (WebView) findViewById(R.id.webView1);
mWebView.setWebViewClient(new HelloWebViewClient());
mWebView.getSettings().setJavaScriptEnabled(true);
mWebView.getSettings().setPluginsEnabled(true);
mWebView.getSettings().setAllowFileAccess(true);
mWebView.loadUrl("http://www.myweb.com/music.html");
}
private class HelloWebViewClient extends WebViewClient {
#Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
view.loadUrl(url);
return true;
}
}
#Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
if ((keyCode == KeyEvent.KEYCODE_BACK) && mWebView.canGoBack()) {
mWebView.goBack();
return true;
}
return super.onKeyDown(keyCode, event);
}
#Override
public void onPause() {
mWebView.setVisibility(View.GONE);
mWebView.destroy();
super.onPause();
}
}
Appreciate for your help.
Best regards,
Virak