webview.loadURL doesnt work always

webview.loadURL doesnt work always - android

I have webview code in oncreate and onOptionsItemSelected which works properly as shown below.(this is my old code working as required)
MainActivity.java
#Override
protected void onCreate(Bundle savedInstanceState)
{ mwebView = (WebView) findViewById(R.id.pdf_web_view);
WebSettings settings = mwebView.getSettings();
settings.setJavaScriptEnabled(true);
mwebView.setWebChromeClient(new WebChromeClient());
mwebView.loadUrl("file://" + getFilesDir() + "/index.html");
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
// TODO Auto-generated method stub
switch (item.getItemId()) {
case R.id.action_gotopage:
LayoutInflater layoutInflater = LayoutInflater.from(this);
View input_dialogView = layoutInflater.inflate(
R.layout.gotopage_dialogbox, null);
final AlertDialog.Builder alert = new AlertDialog.Builder(this);
alert.setTitle("Enter the page number");
alert.setView(input_dialogView);
final EditText input = (EditText) input_dialogView
.findViewById(R.id.pagenum_edit);
input.requestFocus();
input.setTextColor(Color.BLACK);
alert.setPositiveButton("OK",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog,
int whichButton) {
String pg_num = input.getText().toString();
if (pg_num.equals("")) {
input.setError("Page number Required");
} else {
mwebView.loadUrl("javascript:onGotoPage("
+ pg_num + ")");
}
}
});
alert.setNegativeButton("CANCEL",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog,
int whichButton) {
}
});
// create an alert dialog
AlertDialog alert1 = alert.create();
alert1.show();
return super.onOptionsItemSelected(item);
default:
return super.onOptionsItemSelected(item);
}
}
I want to convert this code to slide pages using ViewPager. So i have the code like this(My new code) :
MainActivity.java
public class Mainactivity extends AppCompatActivity {
private int NUM_PAGES=10;
private ViewPager mPager;
private PagerAdapter mPagerAdapter;
#Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.pdf_webview);
mPager = (ViewPager) findViewById(R.id.pdf_view_pager);
mPagerAdapter = new
ScreenSlidePagerAdapter(getSupportFragmentManager());
mPager.setAdapter(mPagerAdapter);
}
private class ScreenSlidePagerAdapter extends FragmentStatePagerAdapter {
public ScreenSlidePagerAdapter(FragmentManager fm) {
super(fm);
}
#Override
public Fragment getItem(int position) {
return new SlideFragment().create(position);
}
#Override
public int getCount() {
return NUM_PAGES;
}
}
}
SlideFragment.java
public class SlideFragment extends Fragment {
private static final String ARG_PAGE = "page";
private int mPageNumber;
private WebView mwebView;
public static SlideFragment create(int pageNumber) {
SlideFragment fragment = new SlideFragment();
Bundle args = new Bundle();
args.putInt(ARG_PAGE, pageNumber);
fragment.setArguments(args);
return fragment;
}
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
mPageNumber = getArguments().getInt(ARG_PAGE);
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
ViewGroup rootView = (ViewGroup) inflater.inflate(
R.layout.pdf_fragment_webview, container, false);
mwebView = (WebView) findViewById(R.id.pdf_web_view);
WebSettings settings = mwebView.getSettings();
settings.setJavaScriptEnabled(true);
mwebView.setWebChromeClient(new WebChromeClient());
mwebView.loadUrl("file://" + getFilesDir() + "/index.html");
mwebView.loadUrl("javascript:onGotoPage("
+ pg_num + ")");
}
}
The webview.loadURL only works first time, it doesn't work second time. But when it is inside onOptionsItemSelected method, it works fine.
I have tried all the solutions from WebView loadUrl works only once
Also tried onPageFinished and evaluate function.
But none worked in my case.I am not able to figure out what is wrong.

I think there is a race condition, between the html page loading and the javascript function running.
Would suggest you first load the html page, then in the onPageFinished callback run the javascript.
Also, when running javascript code on webview, you should use evaluateJavascript method.
Hope this helps.

Related

How can I finish my fragment of TabLayout?

I have a MainActivity and a HomeTabs with three tabs (A B C), i set a refresh on tab C .
My structure is when i trigger onRefresh on tab C , i will switch to MainActivity
and load the data again to show the HomeTabs.
My problem is when i click back for finish(); , the layout will show tab C.
I try to finish the Fragment use like:
getActivity().getSupportFragmentManager().beginTransaction().remove(this).commit();
or
((MainActivity)getActivity()).removeFragment(getActivity());
Both of them are no working , when i click back , i still can't finish the app immediately.
Some one can teach me what step i miss it , that would be appreciated.
My HomeTabs extends Fragment it use ViewPager and TabLayout add three tabs
MainActivity:
public class MainActivity extends AppCompatActivity {
private FrameLayout frameLayout;
private Toolbar toolBar;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
frameLayout = (FrameLayout) findViewById(R.id.frameLayout);
// Load the main Fragment
if (savedInstanceState == null) {
switchFragment(HomeTabs.newInstance());
}
//take the onRefresh data，send data to HomeTabs and open tab C
if (getIntent().hasExtra("refresh")) {
boolean isRefresh = getIntent().getExtras().getBoolean("refresh");
if (isRefresh) {
Bundle bundle = new Bundle();
bundle.putBoolean("refresh", isRefresh);
HomeTabs homeTabs = new HomeTabs();
homeTabs.setArguments(bundle);
switchFragment(homeTabs);
}
}
}
public void switchFragment(Fragment fragment) {
FragmentManager manager = getSupportFragmentManager();
FragmentTransaction transaction = manager.beginTransaction();
transaction.replace(R.id.frameLayout, fragment);
transaction.addToBackStack(null);
transaction.commit();
}
// I try to finsh my tab C , it's no working
public void removeFragment(Activity activity) {
activity.onBackPressed();
}
#Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
if (keyCode == KeyEvent.KEYCODE_BACK) {
new DialogHandler(this).quickDialog(
getResources().getString(R.string.quick),
getResources().getString(R.string.confirm),
getResources().getString(R.string.cancel),
new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialog, int which) {
// If i onRefrsh three times , i will finsh three times... here is my issue.
finish();
}
}, new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialog, int which) {
}
});
}
return super.onKeyDown(keyCode, event);
}
}
Here is my tab C Fragment refresh call back method:
public class MyLineChart extends Fragment implements SwipeRefreshLayout.OnRefreshListener{
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_my_line_chart, container, false);
//.....................
return view;
}
#Override
public void onRefresh() {
refreshLayout.setRefreshing(false);
// Both of them are no working.
//((MainActivity)getActivity()).removeFragment(getActivity());
//getActivity().getSupportFragmentManager().beginTransaction().remove(this).commit();
Intent intent = new Intent(getActivity(),MainActivity.class);
intent.putExtra("refresh", true);
startActivity(intent);
}
Finally my HomeTabs Fragment take the date and show tab C:
Bundle bundle = getArguments();
if (bundle != null) {
boolean isRefresh = bundle.getBoolean("refresh");
if (isRefresh) {
//tab C position is 2
tabLayout.getTabAt(2).select();
}
}

Try this solution to add below code when you are starting activity again on Refresh click:-
intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TASK|Intent.FLAG_ACTIVITY_CLEAR_TOP|Intent.FLAG_ACTIVITY_SINGLE_TOP);
OR
Update your MainActivity.java
1) Add function in MainActivity
public void refreshFragment() {
Bundle bundle = new Bundle();
bundle.putBoolean("refresh", isRefresh);
HomeTabs homeTabs = new HomeTabs();
homeTabs.setArguments(bundle);
switchFragment(homeTabs);
}
Now Call that from Fragment Tab C just replacing startActivity(refresh) code:
MainActivity mainActivity = (MainActivity) getActivity();
mainActivity.refreshFragment();

you can add a listener in your fragment that can trigger a function in your parent activity
which means you need to add an interface in your fragmentC code
public class MyLineChart extends Fragment implements SwipeRefreshLayout.OnRefreshListener {
private MyLineChartListener fragmentListener;
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_my_line_chart, container, false);
//.....................
return view;
}
#Override
public void onAttach(Context context) {
super.onAttach(context);
if (context instanceof MyLineChartListener) {
fragmentListener = (MyLineChartListener) context;
} else {
// throw an error
}
}
#Override
public void onRefresh() {
refreshLayout.setRefreshing(false);
// Both of them are no working.
//((MainActivity)getActivity()).removeFragment(getActivity());
//getActivity().getSupportFragmentManager().beginTransaction().remove(this).commit();
fragmentListener.onSettingRefresh();
}
public interface MyLineChartListener {
void onSettingRefresh();
}
}
then you need to implement the listener in the MainActivity code as follows
public class MainActivity extends AppCompatActivity implements MyLineChart.MyLineChartListener {
private FrameLayout frameLayout;
private Toolbar toolBar;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
frameLayout = (FrameLayout) findViewById(R.id.frameLayout);
// Load the main Fragment
if (savedInstanceState == null) {
switchFragment(HomeTabs.newInstance());
}
}
public void switchFragment(Fragment fragment) {
FragmentManager manager = getSupportFragmentManager();
FragmentTransaction transaction = manager.beginTransaction();
transaction.replace(R.id.frameLayout, fragment);
transaction.addToBackStack(null);
transaction.commit();
}
// I try to finsh my tab C , it's no working
public void removeFragment(Activity activity) {
activity.onBackPressed();
}
// this function will be called when the fragment is refreshed
#Override
public void onSettingRefresh() {
Bundle bundle = new Bundle();
bundle.putBoolean("refresh", true);
HomeTabs homeTabs = new HomeTabs();
homeTabs.setArguments(bundle);
switchFragment(homeTabs);
}
#Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
if (keyCode == KeyEvent.KEYCODE_BACK) {
new DialogHandler(this).quickDialog(
getResources().getString(R.string.quick),
getResources().getString(R.string.confirm),
getResources().getString(R.string.cancel),
new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialog, int which) {
// If i onRefrsh three times , i will finsh three times... here is my issue.
finish();
}
}, new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialog, int which) {
}
});
}
return super.onKeyDown(keyCode, event);
}
}

FragmentTabHost getting empty fragments after popBackStack

I have tried every post in StackOverflow and have not been successful, i have a FragmentTabHost activity with tabs A B C D E
When i go to tab A and then go to tab B everything is ok, but if i return to tab A is blank, then return to tab B is also blank!!
A -> B -> A = Blank -> B = blank
I followed this post to get it working Dynamically changing the fragments inside a fragment tab host?, but the transition between tabs is not working.
I have tried changing my BaseContainerFragment to use getSupportFragmentManager instead of getChildFragmentManager but was unsuccessful, also removing addToBackStack(null) at this point im out of ideas, any help here will be appreciated, thanks.
This is the mainActivity that contain code for creating tabs using fragment.
public class ActivityMain extends FragmentActivity {
public static final String TAB_1_TAG = "tab_1";
public static final String TAB_2_TAG = "tab_2";
public static final String TAB_3_TAG = "tab_3";
public static final String TAB_4_TAG = "tab_4";
public static final String TAB_5_TAG = "tab_5";
private FragmentTabHost mTabHost;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
initView();
}
private void initView() {
mTabHost = (FragmentTabHost)findViewById(android.R.id.tabhost);
mTabHost.setup(this, getSupportFragmentManager(), R.id.realtabcontent);
mTabHost.getTabWidget().setDividerDrawable(null);
mTabHost.getTabWidget().setStripEnabled(false);
mTabHost.addTab(mTabHost.newTabSpec(TAB_1_TAG).setIndicator("", getResources().getDrawable(R.drawable.tab_account)), FragmentAccountContainer.class, null);
mTabHost.addTab(mTabHost.newTabSpec(TAB_2_TAG).setIndicator("", getResources().getDrawable(R.drawable.tab_discounts)), FragmentPromotionsContainer.class, null);
mTabHost.addTab(mTabHost.newTabSpec(TAB_3_TAG).setIndicator("", getResources().getDrawable(R.drawable.tab_payment)), FragmentAccountContainer.class, null);
mTabHost.addTab(mTabHost.newTabSpec(TAB_4_TAG).setIndicator("", getResources().getDrawable(R.drawable.tab_gas)), FragmentAccountContainer.class, null);
mTabHost.addTab(mTabHost.newTabSpec(TAB_5_TAG).setIndicator("", getResources().getDrawable(R.drawable.tab_rest)), FragmentAccountContainer.class, null);
}
#Override
public void onBackPressed() {
boolean isPopFragment = false;
String currentTabTag = mTabHost.getCurrentTabTag();
Log.e("ActivityMain", "currentTabTag: " + currentTabTag);
if (currentTabTag.equals(TAB_1_TAG)) {
isPopFragment = ((BaseContainerFragment) getSupportFragmentManager().findFragmentByTag(TAB_1_TAG)).popFragment();
} else if (currentTabTag.equals(TAB_2_TAG)) {
isPopFragment = ((BaseContainerFragment) getSupportFragmentManager().findFragmentByTag(TAB_2_TAG)).popFragment();
} else if (currentTabTag.equals(TAB_3_TAG)) {
isPopFragment = ((BaseContainerFragment) getSupportFragmentManager().findFragmentByTag(TAB_3_TAG)).popFragment();
} else if (currentTabTag.equals(TAB_4_TAG)) {
isPopFragment = ((BaseContainerFragment) getSupportFragmentManager().findFragmentByTag(TAB_4_TAG)).popFragment();
} else if (currentTabTag.equals(TAB_5_TAG)) {
isPopFragment = ((BaseContainerFragment) getSupportFragmentManager().findFragmentByTag(TAB_5_TAG)).popFragment();
}
Log.e("ActivityMain", "isPopFragment: " + isPopFragment);
if (!isPopFragment) {
finish();
}
}
}
This is my BaseContainerFragment that allows backtracking and replacment of fragments
public class BaseContainerFragment extends Fragment {
public void replaceFragment(Fragment fragment, boolean addToBackStack) {
FragmentTransaction transaction = getChildFragmentManager().beginTransaction();
if (addToBackStack) {
transaction.addToBackStack(null);
}
transaction.replace(R.id.container_framelayout, fragment);
transaction.commit();
getChildFragmentManager().executePendingTransactions();
}
public boolean popFragment() {
Log.e("test", "pop fragment: " + getChildFragmentManager().getBackStackEntryCount());
boolean isPop = false;
if (getChildFragmentManager().getBackStackEntryCount() > 0) {
isPop = true;
getChildFragmentManager().popBackStack();
}
return isPop;
}
}
This is container for the first Tab (this tab holds 2 activities, one is main, and another is called on listview Click)
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
myPrefs = this.getActivity().getSharedPreferences("getLogin", Context.MODE_PRIVATE);
idUser = myPrefs.getInt("idUser", 0);
d(TAG, "idUser: " + idUser);
/*
Map<String,?> keys = myPrefs.getAll();
for(Map.Entry<String,?> entry : keys.entrySet()){
Log.d("map values",entry.getKey() + ": " +
entry.getValue().toString());
}
*/
context = getActivity();
pDialog = new SweetAlertDialog(context, PROGRESS_TYPE);
// Check if Internet present
if (!isOnline(context)) {
// Internet Connection is not present
makeText(context, "Error en la conexion de Internet",
LENGTH_LONG).show();
// stop executing code by return
return;
}
new asyncGetFeedClass(context).execute();
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View v = inflater.inflate(R.layout.activity_cardholder, container, false);
toolbar = (Toolbar) v.findViewById(R.id.toolbar);
TextView mTitle = (TextView) toolbar.findViewById(toolbar_title);
mTitle.setText("TARJETAS");
list = (ListView) v.findViewById(R.id.list);
// Click event for single list row
list.setOnItemClickListener(new AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
FragmentAccount fragment = new FragmentAccount();
// if U need to pass some data
Bundle bundle = new Bundle();
if (listBalance.get(position).get(TAG_ACCOUNT_BANKACCOUNTS_ID) != null) {
bundle.putString("idBankAccount", listBalance.get(position).get(TAG_ACCOUNT_BANKACCOUNTS_ID));
bundle.putString("idGiftCard", "0");
} else if (listBalance.get(position).get(TAG_ACCOUNT_GIFTCARDS_ID) != null) {
bundle.putString("idGiftCard", listBalance.get(position).get(TAG_ACCOUNT_GIFTCARDS_ID));
bundle.putString("idBankAccount", "0");
} else {
bundle.putString("idBankAccount", "0");
bundle.putString("idGiftCard", "0");
}
fragment.setArguments(bundle);
((BaseContainerFragment) getParentFragment()).replaceFragment(fragment, false);
}
});
return v;
}
The main class for Tab #1
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
myPrefs = this.getActivity().getSharedPreferences("getLogin", Context.MODE_PRIVATE);
idUser = myPrefs.getInt("idUser", 0);
d(TAG, "idUser: " + idUser);
/*
Map<String,?> keys = myPrefs.getAll();
for(Map.Entry<String,?> entry : keys.entrySet()){
Log.d("map values",entry.getKey() + ": " +
entry.getValue().toString());
}
*/
context = getActivity();
pDialog = new SweetAlertDialog(context, PROGRESS_TYPE);
// Check if Internet present
if (!isOnline(context)) {
// Internet Connection is not present
makeText(context, "Error en la conexion de Internet",
LENGTH_LONG).show();
// stop executing code by return
return;
}
Bundle bundle = this.getArguments();
idBankAccount = Integer.parseInt(bundle.getString(FragmentCardHolder.TAG_ACCOUNT_BANKACCOUNTS_ID, "0"));
idGiftCard = Integer.parseInt(bundle.getString(FragmentCardHolder.TAG_ACCOUNT_GIFTCARDS_ID, "0"));
if(idBankAccount > 0){
new asyncGetBankTransactions(context).execute();
} else if(idGiftCard > 0) {
new asyncGetGiftCardTransactions(context).execute();
} else {
new asyncGetX111Transactions(context).execute();
}
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View v = inflater.inflate(R.layout.activity_account, container, false);
toolbar = (Toolbar) v.findViewById(id.toolbar);
TextView mTitle = (TextView) toolbar.findViewById(toolbar_title);
mTitle.setText("MI CUENTA");
toolbar.setNavigationIcon(R.drawable.icon_user);
toolbar.setNavigationOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
goToCards();
}
});
layoutAccount = (LinearLayout) v.findViewById(id.layoutAccount);
layoutGetCredit = (LinearLayout) v.findViewById(id.layoutGetCredit);
layoutTransactions = (LinearLayout) v.findViewById(id.layoutTransactions);
btnAccount = (Button) v.findViewById(id.btnMyBalance);
btnGetCredit = (Button) v.findViewById(id.btnGetCredit);
btnSendCredit = (Button) v.findViewById(id.btnSendCredit);
btnTransactions = (Button) v.findViewById(id.btnTransactions);
list = (ListView) v.findViewById(id.list);
btnTransactions.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
layoutAccount.setVisibility(View.GONE);
layoutGetCredit.setVisibility(View.GONE);
layoutTransactions.setVisibility(View.VISIBLE);
}
});
btnGetCredit.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
layoutAccount.setVisibility(View.GONE);
layoutGetCredit.setVisibility(View.VISIBLE);
layoutTransactions.setVisibility(View.GONE);
}
});
btnAccount.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
layoutAccount.setVisibility(View.VISIBLE);
layoutGetCredit.setVisibility(View.GONE);
layoutTransactions.setVisibility(View.GONE);
}
});
return v;
}
private void goToCards() {
FragmentCardHolder fragment = new FragmentCardHolder();
((BaseContainerFragment) getParentFragment()).replaceFragment(fragment, true);
}

I think the problem is in hidden part of code where you add first fragment to container (FragmentAccountContainer and FragmentPromotionsContainer classes). I suggest you to create abstract method in BaseContainerFragment.class with signature by example
protected abstract Fragment getFirstFragment();
So concrete container class will override this method and return new instance of a first fragment to super class and then in parent class add it to fragment container with using add transaction.
#Override
public void onCreate(#Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
if (savedInstanceState == null) {
addFragment(getFirstFragment(), false);
}
}
Note you should check if savedInstanceState is null before adding fragment to avoid dublicates in case activity recreation by system.
In nested fragments you could use replace like you did it ((BaseContainerFragment) getParentFragment()).replaceFragment(___, true);
Also i have a few suggestions for you code. You couldn't just avoid overriding onBackPressed in activity like #NecipAllef suggests, because of known bug with default back logic and child fragment manager , but you could simplify call to popFragment like
#Override
public void onBackPressed() {
String currentTabTag = mTabHost.getCurrentTabTag();
boolean isPopFragment = ((BaseContainerFragment) getSupportFragmentManager().findFragmentByTag(currentTabTag)).popFragment();
if (!isPopFragment) {
super.onBackPressed();
}
}
And for setting bundles to fragment i suggest use fabric method pattern, like
public class TestFragment extends Fragment {
public static Fragment newInstance(String text){
Fragment fragment = new TestFragment();
Bundle args = new Bundle();
args.putString("text", text);
fragment.setArguments(args);
return fragment;
}
}
Ps: i created for you a simple project with described logic

Why are you keeping track of Fragments and popping them by yourself? You don't need to do that, and you shouldn't override onBackPressed(). Let FragmentManager handle the fragment transactions.
If you have fragments inside an activity, use
FragmentManager fManager = getFragmentManager();
or if you want to support devices prior to Android 3.0, use
FragmentManager fManager = getSupportFragmentManager();
if fragments are inside another fragment, then use
FragmentManager fManager = getChildFragmentManager();
After you have fManager, to show a fragment, use
fManager.beginTransaction().add(R.id.fragment_parent, new FirstTabFragment()).commit();
where fragment_parent is the parent view which you want to place your fragments.
When you want to switch to next fragment, use
fManager.beginTransaction().replace(R.id.fragment_parent, new SecondTabFragment())
.addToBackStack(null)
.commit();
Since you add it to back stack, you will see your first fragment when you press back. That's it.
Moreover, as you can easily realize this will cause your fragments to be created from scratch every time, you can prevent this by initializing them once and reuse them.
HTH

Passing Url to another WebView Tab and load

I'm new to programming .
I make an app that contains 3 Tabs with viewpager. 1st tab is a list of Button with their respective link. 2nd Tab is a WebView that will load url passed from the 1st tab when the users clicked on the link. 3rd tab is my Download Manager.
This is my MainActivity:
public class MainActivity extends SherlockFragmentActivity{
ActionBar mActionBar;
Button button;
ViewPager mPager;
Tab tab;
String TabFragmentB;
public void setTabFragmentB(String t){
TabFragmentB = t;
}
public String getTabFragmentB(){
return TabFragmentB;
}
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mActionBar = getSupportActionBar();
// Hide Actionbar Icon
mActionBar.setDisplayShowHomeEnabled(false);
// Hide Actionbar Title
mActionBar.setDisplayShowTitleEnabled(false);
// Create Actionbar Tabs
mActionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
//For ViewPager
mPager = (ViewPager) findViewById(R.id.pager);
//Activate FragmentManger
FragmentManager fm= getSupportFragmentManager();
ViewPager.SimpleOnPageChangeListener ViewPagerListener = new ViewPager.SimpleOnPageChangeListener(){
#Override
public void onPageSelected(int position){
super.onPageSelected(position);
mActionBar.setSelectedNavigationItem(position);//find the viewPager Potision
}
};
mPager.setOnPageChangeListener(ViewPagerListener);
// Locate the adapter class called ViewPagerAdapter.java
ViewPagerAdapter viewpageradapter = new ViewPagerAdapter(fm);
// Set the View Pager Adapter into ViewPager
mPager.setAdapter(viewpageradapter);
// Capture tab button clicks
ActionBar.TabListener tabListener = new ActionBar.TabListener() {
#Override
public void onTabSelected(Tab tab, FragmentTransaction ft) {
// Pass the position on tab click to ViewPager
mPager.setCurrentItem(tab.getPosition());
}
#Override
public void onTabUnselected(Tab tab, FragmentTransaction ft) {
// TODO Auto-generated method stub
}
#Override
public void onTabReselected(Tab tab, FragmentTransaction ft) {
// TODO Auto-generated method stub
}
};
// Create first Tab
tab = mActionBar.newTab().setIcon(R.drawable.button_home).setTabListener(tabListener);
mActionBar.addTab(tab);
// Create second Tab
tab = mActionBar.newTab().setIcon(R.drawable.button_browse).setTabListener(tabListener);
mActionBar.addTab(tab);
// Create third Tab
tab = mActionBar.newTab().setIcon(R.drawable.button_downloads).setTabListener(tabListener);
mActionBar.addTab(tab);
}
}
My FragmentTab1:
public class FragmentTab1 extends SherlockFragment implements OnClickListener{
FragmentTab2 fTab2;
ViewPager viewPager;
WebView webview;
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.home, container, false);
viewPager = (ViewPager) getActivity().findViewById(R.id.pager);
webview = (WebView) view.findViewById(R.id.webView1);
view.findViewById(R.id.Button01).setOnClickListener(this);
view.findViewById(R.id.Button02).setOnClickListener(this);
view.findViewById(R.id.Button03).setOnClickListener(this);
view.findViewById(R.id.Button04).setOnClickListener(this);
view.findViewById(R.id.Button05).setOnClickListener(this);
return view;
}
#Override
public void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
setUserVisibleHint(true);
}
#Override
public void onClick(View v) {
switch (v.getId()){
case R.id.Button01:
String urlToBeSend = " http://google.com";
String TabOfFragmentB = ((MainActivity)getActivity()).getTabFragmentB();
FragmentTab2 fragmentB = (FragmentTab2)getActivity().getSupportFragmentManager().findFragmentByTag(TabOfFragmentB);
fragmentB.b_updateText(urlToBeSend);
Toast.makeText(getSherlockActivity(), "url to be send = " +urlToBeSend, Toast.LENGTH_LONG).show();
viewPager.setCurrentItem(1);
break;
case R.id.Button02:
String urlToBeSend2 = " http://facebook.com";
String TabOfFragmentB2 = ((MainActivity)getActivity()).getTabFragmentB();
FragmentTab2 fragmentB2 = (FragmentTab2)getActivity().getSupportFragmentManager().findFragmentByTag(TabOfFragmentB2);
fragmentB2.b_updateText(urlToBeSend2);
Toast.makeText(getSherlockActivity(), "url to be send = " +urlToBeSend2, Toast.LENGTH_LONG).show();
viewPager.setCurrentItem(1);
break;
case R.id.Button03:
viewPager.setCurrentItem(1);
break;
case R.id.Button04:
viewPager.setCurrentItem(1);
break;
case R.id.Button05:
viewPager.setCurrentItem(1);
break;
default:
break;
}
}
}
For My FragmentTab2:
public class FragmentTab2 extends SherlockFragment {
private static WebView webview;
private ProgressBar progress;
String homeUrl="http://new3gpmovies.com/";
private int urlIndex=0;
String a_url;
TextView b_received;
ViewPager viewpager;
public void b_updateText(String t){
b_received.setText(t);
a_url = t;
}
public FragmentTab2(){
}
#SuppressLint("SetJavaScriptEnabled")
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.webview, container, false);
String myTag = getTag();
((MainActivity)getActivity()).setTabFragmentB(myTag);
b_received = (TextView) view.findViewById(R.id.textView1);
ImageView backward = (ImageView) view.findViewById(R.id.backward);
ImageView forward = (ImageView) view.findViewById(R.id.forward);
backward.setOnClickListener(new OnClickListener(){
public void onClick(View view){
if (webview.canGoBack()){
webview.goBack();
}
}
});
forward.setOnClickListener(new OnClickListener(){
public void onClick(View view){
if (webview.canGoForward()){
webview.goForward();
}
}
});
webview = (WebView) view.findViewById(R.id.webView1);
webview.setWebChromeClient(new MyWebChromeClient());
webview.setWebViewClient(new MyWebViewClient());
WebSettings settings = webview.getSettings();
settings.setJavaScriptEnabled(true);
progress = (ProgressBar) view.findViewById(R.id.progressBar1);
progress.setMax(100);
if (a_url != null){
webview.loadUrl(a_url);
}else if (a_url == null){
webview.loadUrl(homeUrl);
}
if (progress.getProgress() == 100){
FragmentTab2.this.progress.setProgress(0);
}
return view;
}
private class MyWebViewClient extends WebViewClient{
#SuppressLint({ "InlinedApi", "NewApi" })
#Override
public boolean shouldOverrideUrlLoading(WebView view, String url){
boolean value = true;
if (url.endsWith(".3gp") || url.endsWith(".mp4")){
Intent downloadIntent = new Intent("com.nanoidea.download.services.IDownloadService");
downloadIntent.putExtra(MyIntents.TYPE, MyIntents.Types.ADD);
downloadIntent.putExtra(MyIntents.URL, Utils.url[urlIndex]);
getActivity().startService(downloadIntent);
urlIndex++;
if (urlIndex >= Utils.url.length) {
urlIndex = 0;
}
value=false;
}
if(value){
view.loadUrl(url);
}
return value;
}
#Override
public void onReceivedError(WebView view, int errorCode, String description, String failingUrl){
webview.loadUrl("file:///android_asset/failedPage.html");
}
}
public String getFileName(String url) {
String filenameWithoutExtension = "";
if (url.endsWith("3gp")){
filenameWithoutExtension = String.valueOf(System.currentTimeMillis()
+ ".3gp");
}else if (url.endsWith(".mp4")){
filenameWithoutExtension = String.valueOf(System.currentTimeMillis()
+ ".mp4");
}
return filenameWithoutExtension;
}
#Override
public void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
setUserVisibleHint(true);
}
private class MyWebChromeClient extends WebChromeClient{
#Override
public void onProgressChanged(WebView view, int newProgress){
FragmentTab2.this.setValue(newProgress);
super.onProgressChanged(view, newProgress);
}
}
public void setValue(int progress){
this.progress.setProgress(progress);
}
public static boolean canGoBack(){
return webview.canGoBack();
}
public static void goBack(){
webview.goBack();
}
}
Question:
Why when i click on the link from the 1st tab the second tab doesn't change? even if the 2nd tab received the string url from the 1st tab? any idea? Please guide me.

Passing String to Fragment

I have an EditText view in my MainActivity that the user can input a url. This MainActivity also contains a fragment which will hold a WebView.
I have it set up so that when the fragment is displayed the url will load in the WebView. However I don't know how I can pass the String to the Fragment?
Below is the Main Activity code:
public class MainActivity extends FragmentActivity {
Button goBtn;
EditText urlInput;
String url;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
goBtn = (Button)findViewById(R.id.button1);
urlInput = (EditText)findViewById(R.id.editText1);
goBtn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
url = "http://"+urlInput.getText().toString(); //THIS TO FRAGMENT!
Toast.makeText(v.getContext(), "Search:" + url, Toast.LENGTH_SHORT).show();
}
});
and this is the fragment code:
WebView webDisplay;
String url;
AsyncHttpClient client;
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,Bundle savedInstanceState) {
View v = inflater.inflate(R.layout.frag1_layout, container, false);
urlDisplay = (TextView)v.findViewById(R.id.textView1);
webDisplay = (WebView)v.findViewById(R.id.webView1);
return v;
}
#Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
//url = "http://"+this.getActivity() ???
client = new AsyncHttpClient();
client.get(url, new AsyncHttpResponseHandler(){
#Override
public void onSuccess(String response) {
Toast.makeText(getActivity(), "Success!", Toast.LENGTH_SHORT).show();
webDisplay.setWebViewClient(new WebViewClient() {
public boolean shouldOverrideUrlLoading(WebView view, String url) {
view.loadUrl(url);
return true;
}});
webDisplay.loadUrl(url);
}
});
The value I am concerned about it the String URL variable in MainActivity.java.
The transaction of the fragments is controlled by a class TabFragment.
public class TabFragment extends Fragment {
private static final int TAB1_STATE = 0x1;
private static final int TAB2_STATE = 0x2;
private int mTabState;
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,Bundle savedInstanceState) {
View v = inflater.inflate(R.layout.fragment_tab, container, false);
//References to buttons in layout file
Button tabBtn1 = (Button)v.findViewById(R.id.tabBtn1);
Button tabBtn2 = (Button)v.findViewById(R.id.tabBtn2);
//add listener to buttons
tabBtn1.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View arg0) {
//Action to perform when Tab 1 clicked...
goToTab1View();
}
});
tabBtn2.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
//Action to perform when Tab 2 clicked...
goToTab2View();
}
});
return v;
}
//Tab action functions.
protected void goToTab1View() {
if(mTabState != TAB1_STATE){
mTabState = TAB1_STATE;
FragmentManager fm = getFragmentManager();
if(fm!= null){
//Perform fragment transaction
FragmentTransaction ft = fm.beginTransaction();
ft.replace(R.id.fragment_content, new FragTab1());
ft.commit();
}
}
}
protected void goToTab2View() {
if(mTabState != TAB2_STATE){
mTabState = TAB2_STATE;
FragmentManager fm = getFragmentManager();
if(fm!= null){
//Perform fragment transaction
FragmentTransaction ft = fm.beginTransaction();
ft.replace(R.id.fragment_content, new FragTab2());
ft.commit();
}
}
}

Or create Bundle and set it using method fragment.setArguments(myBundle);

This answer is in case the fragment already exists
You can define a public method in your fragment. Something like:
public void setString(final String str) { //... }
After that make your activity to implement OnClickListener interfave. And when the button is pressed just type something like that:
public void onClick(View view) {
// Form url...
((YourWebViewFragment) getFragmentManager().findFragmentById(fragments_id)).setString(url);
}

WebView inside Fragment - Back button?

I created a small Android 4 application with fragments.
In all these fragments I have some webviews and if I click a different fragment I want a different website to load.
I have right now TabOne.java ; TabTwo.java ; TabThree.java and so on.
I was also wondering : Can I make this application without needing a TabOne.java, TabTwo.java and so on; only from MainActivity.java? I mean, to have a single WebView, and when clicking different Tabs, this WebView to load different Url (according to the selected Tab).
If this is not possible, can you tell me what is wrong here (TabOne.java) :
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState)
{
View view = inflater.inflate(R.layout.tabone, container, false);
myWebView = (WebView) view.findViewById(R.id.webview);
myWebView.getSettings().setPluginsEnabled(true);
myWebView.loadUrl("http://m.stirileprotv.ro");
myWebView = new WebView(getActivity());
myWebView.setOnKeyListener(new OnKeyListener(){
#Override
public boolean onKey(View v, int keyCode, KeyEvent event) {
if ((keyCode == KeyEvent.KEYCODE_BACK) && myWebView.canGoBack())
{
myWebView.goBack();
return true;
}
return false;
}
});
myWebView.setWebViewClient(new WebViewClient() {
#Override public boolean shouldOverrideUrlLoading(WebView view, String url) {
if (Uri.parse(url).getHost().equals("m.stirileprotv.ro")) {
myWebView.loadUrl(url);
return true;
}
else
{
return false;
}
}
});
return view;
}

This is what i did.
In the fragment, declare the webview reference as static-
public static WebView mWebView;
public WebFragment() {
// Required empty public constructor
}
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View v=inflater.inflate(R.layout.fragment_web, container, false);
mWebView = (WebView) v.findViewById(R.id.webview);
mWebView.loadUrl("https://google.com");
// Enable Javascript
WebSettings webSettings = mWebView.getSettings();
webSettings.setJavaScriptEnabled(true);
// Force links and redirects to open in the WebView instead of in a browser
mWebView.setWebViewClient(new WebViewClient());
return v;
}
public boolean canGoBack() {
return mWebView.canGoBack();
}
public void goBack() {
mWebView.goBack();
}
}
Now, In the parent activity -
#Override
public void onBackPressed() {
WebFragment fragment = new WebFragment();
if (fragment.mWebView.canGoBack()) {
fragment.mWebView.goBack();
} else {
super.onBackPressed();
}
}

What I did was implement it within the activity and then have a public static so:
In the main activity:
public class MainActivity extends FragmentActivity{
public static WebView myWebView;
...
#Override
public void onBackPressed() {
if (getSupportFragmentManager().findFragmentByTag("yourtag") != null) {
if(myWebView.canGoBack())
myWebView.goBack();
else {
super.onBackPressed();
}
}
else
super.onBackPressed();
}
...
}
and to reference it within the fragment:
MainActivity.myWebView = (WebView) getView().findViewById(R.id.webview);
and be sure when you create the fragment you add a tag
transaction.replace(R.id.yourfragid, newfragment, "yourtag");

Develop Reference

The Android operating system is a mobile operating system that was developed by Google (GOOGL?) to be primarily used for touchscreen devices, cell phones, and tablets.

webview.loadURL doesnt work always - android

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