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How to Access Activity(except mainactivity) from Fragment?

I created my test project where i code to communicate between two fragments but actully I want to access activity from fragment.
Here is code to connect fragment to fragment, its working absolutely right without any error but now i want to change this code to connect activity from fragment instead of fragment to fragment communication.
So Please change this code to access activities from fragment. I stuck on this issue for than a week.So Guys please resolve this.
here is my mainaactivity:
public class MainActivity extends AppCompatActivity implements FragmentA.FragmentAListener, FragmentB.FragmentBListener {
private FragmentA fragmentA;
private FragmentB fragmentB;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
fragmentA = new FragmentA();
fragmentB = new FragmentB();
getSupportFragmentManager().beginTransaction()
.replace(R.id.container_a, fragmentA)
.replace(R.id.container_b, fragmentB)
.commit();
}
#Override
public void onInputASent(CharSequence input) {
fragmentB.updateEditText(input);
}
#Override
public void onInputBSent(CharSequence input) {
fragmentA.updateEditText(input);
}
Here is my FragmentA.java:
public class FragmentA extends Fragment {
private FragmentAListener listener;
private EditText editText;
private Button buttonOk;
public interface FragmentAListener {
void onInputASent(CharSequence input);
}
#Nullable
#Override
public View onCreateView(LayoutInflater inflater, #Nullable ViewGroup container, #Nullable Bundle savedInstanceState) {
View v = inflater.inflate(R.layout.fragment_a, container, false);
editText = v.findViewById(R.id.edit_text);
buttonOk = v.findViewById(R.id.button_ok);
buttonOk.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
CharSequence input = editText.getText();
listener.onInputASent(input);
}
});
return v;
}
public void updateEditText(CharSequence newText) {
editText.setText(newText);
}
#Override
public void onAttach(Context context) {
super.onAttach(context);
if (context instanceof FragmentAListener) {
listener = (FragmentAListener) context;
} else {
throw new RuntimeException(context.toString()
+ " must implement FragmentAListener");
}
}
#Override
public void onDetach() {
super.onDetach();
listener = null;
}
}
Here is my FragmentB.java:
public class FragmentB extends Fragment {
private FragmentBListener listener;
private EditText editText;
private Button buttonOk;
public interface FragmentBListener {
void onInputBSent(CharSequence input);
}
#Nullable
#Override
public View onCreateView(LayoutInflater inflater, #Nullable ViewGroup container, #Nullable Bundle savedInstanceState) {
View v = inflater.inflate(R.layout.fragment_b, container, false);
editText = v.findViewById(R.id.edit_text);
buttonOk = v.findViewById(R.id.button_ok);
buttonOk.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
CharSequence input = editText.getText();
listener.onInputBSent(input);
}
});
return v;
}
public void updateEditText(CharSequence newText) {
editText.setText(newText);
}
#Override
public void onAttach(Context context) {
super.onAttach(context);
if (context instanceof FragmentBListener) {
listener = (FragmentBListener) context;
} else {
throw new RuntimeException(context.toString()
+ " must implement FragmentBListener");
}
}
#Override
public void onDetach() {
super.onDetach();
listener = null;
}
}
Here is my Fertilizers.java file which i want to access from FragmentA.:
public class Fertilizers extends AppCompatActivity {
RecyclerView mRecyclerView;
List<FertilizerData> myFertilizersList;
FertilizerData mFertilizersData;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_fertilizers);
mRecyclerView = (RecyclerView)findViewById(R.id.recyclerView);
GridLayoutManager gridLayoutManager;
gridLayoutManager = new GridLayoutManager(Fertilizers.this, 1);
mRecyclerView.setLayoutManager(gridLayoutManager);
myFertilizersList = new ArrayList<>();
mFertilizersData = new FertilizerData("Urea Fertilizer","Urea is a concent","Rs.1900",R.drawable.urea);
myFertilizersList.add(mFertilizersData);
myFertilizersList.add(mFertilizersData); }
}
please write here a block of code to call Fertilzers Activity from FragmentA, I,ll be very thankful to you.

Calling getActivity() in your fragment gives you the calling activity so if MainActivity started your fragment then you would do
(MainActivity(getActivity())).something_from_your_main_activity

Solution found by itself regarding this issue.
FragmentHome.java class should look like this:
public class FragmentHome extends Fragment {
private Button button;
public FragmentHome(){
}
public interface OnMessageReadListener
{
public void onMessageRead(String message);
}
#Nullable
#Override
public View onCreateView(LayoutInflater inflater, #Nullable ViewGroup container, #Nullable Bundle savedInstanceState) {
View v = inflater.inflate(R.layout.fragment_home, container, false);
button = (Button)v.findViewById(R.id.bn);
button.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
Intent intent = new Intent(getActivity(), Fertilizers.class);
intent.putExtra("some"," some data");
startActivity(intent);
}
});
return v;
}
}
FertilizersActivity.java should look like this:
public class Fertilizers extends AppCompatActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_fertilizers);
Bundle bundle = getIntent().getExtras();
if (bundle != null){
if(bundle.getStringArrayList("some") !=null){
Toast.makeText(getApplicationContext(),"data:" + bundle.getStringArrayList("some"),Toast.LENGTH_LONG).show();
}
}
}
}

How to cache multiple URLs for a WebView Activity from Recycler View onClick

I have setup a WebViewActivity which gets the URL from the intent. I have setup an onClickListener for my Recyclerview which opens the WebViewActivity and loads the URL. However the WebView does not cache each an every page it opens. What changes should i make in the code?
WebViewActivity.java
public class WebViewActivity extends AppCompatActivity {
WebView myWebView;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_web_view);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
toolbar.setTitle("Search");
toolbar.setNavigationOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
startActivity(new Intent(getApplicationContext(), MainActivity.class));
}
});
Intent intent = getIntent();
String url = intent.getStringExtra("url");
myWebView = (WebView) findViewById(R.id.webview);
myWebView.setWebViewClient(new WebViewClient());
WebSettings webSettings = myWebView.getSettings();
myWebView.getSettings().setCacheMode(WebSettings.LOAD_CACHE_ELSE_NETWORK);
webSettings.setJavaScriptEnabled(true);
myWebView.loadUrl(url);
}
#Override
public void onBackPressed() {
if(myWebView.canGoBack()){
myWebView.goBack();
}else{
super.onBackPressed();
finish();
}
}
}
ArticleAdapter.java
public class ArticleAdapter extends RecyclerView.Adapter<ArticleAdapter.ArticleViewHolder> {
private static final String TAG = "ArticleAdapter";
private Context mContext;
private ArrayList<String> mlist;
private String url;
public ArticleAdapter(Context context, ArrayList<String> list) {
mContext = context;
mlist = list;
}
#Override
public ArticleViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
Log.d(TAG, "onCreateViewHolder: called");
Log.d(TAG, "onCreateViewHolder: GOT REQUEST CALLED===================");
LayoutInflater layoutInflater = LayoutInflater.from(mContext);
View view = layoutInflater.inflate(R.layout.article_list, parent, false);
return new ArticleViewHolder(view);
}
#Override
public void onBindViewHolder(#NonNull final ArticleViewHolder articleViewHolder, int i) {
if(mlist.size()!=0){
url = mlist.get(articleViewHolder.getAdapterPosition());
articleViewHolder.name.setText(url);
articleViewHolder.name.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent intent = new Intent(mContext, WebViewActivity.class);
intent.putExtra("url", articleViewHolder.name.getText());
mContext.startActivity(intent);
}
});
}
}
class ArticleViewHolder extends RecyclerView.ViewHolder {
TextView name;
public ArticleViewHolder(View itemView) {
super(itemView);
name = itemView.findViewById(R.id.tv_title);
}
}
#Override
public int getItemCount() {
return mlist.size();
}
}

You can write URL to the shared preference or file (with append mode), then whenever you need history just read the contents from the location
If you want cache web URLs then there is an option for WebView
Java code
webView.getSettings().setCacheMode(WebSettings.LOAD_CACHE_ELSE_NETWORK);
websettings.setAppCachePath(getContext().getCacheDir().toString());
websettings.setAppCacheEnabled(true);
websettings.setCacheMode(WebSettings.LOAD_DEFAULT);
this and this I have found useful, please refer these

How to add app bar in YouTube player activity?

How to add action bar in YouTube player?
I'm trying to add action bar in this activity, but because it's not extended to AppCompatActivity that's why I'm getting an error in getSupportActionBar();. I'm also getting error if I replace the YouTubeBaseActivity with AppCompatActivity. Can anyone help me with this?
public class ActivityPlayer extends YouTubeBaseActivity implements YouTubePlayer.OnInitializedListener {
public String DEVELOPER_KEY = "key";
public String YOUTUBE_VIDEO_CODE = "5z-Roo_NpI4";
private static final int RECOVERY_DIALOG_REQUEST = 1;
YouTubePlayerView youTubeView;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setupActionBar();
setContentView(R.layout.activity_main);
youTubeView = (YouTubePlayerView) findViewById(R.id.youtube_player);
youTubeView.initialize(DEVELOPER_KEY, this);
}
private void setupActionBar() {
ActionBar actionBar = getSupportActionBar();
if (actionBar != null) {
actionBar.setDisplayHomeAsUpEnabled(true);
}
}
#Override
public boolean onCreateOptionsMenu(final Menu menu) {
getMenuInflater().inflate(R.menu.options_menu, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case android.R.id.home:
finish();
return true;
}
return true;
}
#Override
public void onInitializationFailure(YouTubePlayer.Provider provider, YouTubeInitializationResult errorReason) {
if (errorReason.isUserRecoverableError()) {
errorReason.getErrorDialog(this, RECOVERY_DIALOG_REQUEST).show();
} else {
Snackbar.make(youTubeView, "There was an error initializing the video player.", Snackbar.LENGTH_LONG).setDuration(5000).show();
}
}
#Override
public void onInitializationSuccess(YouTubePlayer.Provider provider, YouTubePlayer player, boolean wasRestored) {
if (!wasRestored) {
player.loadVideo(YOUTUBE_VIDEO_CODE);
player.setPlayerStyle(YouTubePlayer.PlayerStyle.CHROMELESS);
}
}
#Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (requestCode == RECOVERY_DIALOG_REQUEST) {
getYouTubePlayerProvider().initialize(DEVELOPER_KEY, this);
}
}
#Override
public void onBackPressed() {
finish();
}
private YouTubePlayer.Provider getYouTubePlayerProvider() {
return (YouTubePlayerView) findViewById(R.id.youtube_player);
}
}

I had the same Problem with you, I'm posting an answer in case you or others still need a work around. Forget about YoutubeBaseActivity and focus on YoutubePlayerSupportFragment because Fragment let you setup your Activity as you wish. There is YoutubePlayerFragment also but the Support version of it work better with android support libraries.
Here's is the Steps I used :
Make your activity Extends AppCompatActivity
public class ActivityPlayer extends AppCompatActivity {
Add a FrameLayout in xml layout of the Current Activity that extends AppCompatActivity (activity_main.xml)
<FrameLayout
android:id="#+id/flYoutube"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:visibility="visible" />
Create a YoutubeFragment extends Fragment, with fragment_youtube.xml layout and a FrameLayout inside of it. And in onCreateView, create a YoutubePlayerSupportFragment instance and replace the FrameLayout within the fragment_youtube.xml with that instance of YoutubePlayerSupportFragment.
public class YoutubeFragment extends Fragment {
private static final String YOUTUBE_API_KEY = "8S7K4hEVhgOQ87501j-FAKE-KEY";
// the fragment initialization parameters, e.g. ARG_ITEM_NUMBER
private static final String VIDEO_ID = "VIDEO_ID";
// TODO: Rename and change types of parameters
private String videoId;
public YoutubeFragment() {
// Required empty public constructor
}
public static YoutubeFragment newInstance(String videoId) {
YoutubeFragment fragment = new YoutubeFragment();
Bundle args = new Bundle();
args.putString(VIDEO_ID, videoId);
fragment.setArguments(args);
return fragment;
}
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
if (getArguments() != null) {
videoId = getArguments().getString(VIDEO_ID);
}
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
// Inflate the layout for this fragment
View rootView = inflater.inflate(R.layout.fragment_youtube, container, false);
YouTubePlayerSupportFragment youTubePlayerFragment = YouTubePlayerSupportFragment.newInstance();
FragmentTransaction transaction = getChildFragmentManager().beginTransaction();
transaction.replace(R.id.flYoutubePlayer, youTubePlayerFragment).commit();
youTubePlayerFragment.initialize(YOUTUBE_API_KEY, new YouTubePlayer.OnInitializedListener() {
#Override
public void onInitializationSuccess(YouTubePlayer.Provider arg0, YouTubePlayer youTubePlayer, boolean b) {
if (!b) {
//youTubePlayer.setFullscreen(true);
youTubePlayer.loadVideo(videoId);
//yoTubePlayer.play();
}
}
#Override
public void onInitializationFailure(YouTubePlayer.Provider arg0, YouTubeInitializationResult arg1) {
// TODO Auto-generated method stub
}
});
return rootView;
}
}
Create a 2nd FrameLayout in fragment_youtube.xml
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="jfsl.ayibopost.fragments.YoutubeFragment">
<FrameLayout
android:id="#+id/flYoutubePlayer"
android:layout_width="match_parent"
android:layout_height="200dp"></FrameLayout>
</RelativeLayout>
Last thing to do in PlayerActivity onCreate(), is to create an instance of your own created YoutubeFragment and replace the Frame Layouts within the activity_main.xml with that YoutubeFragment instance via Fragment Transaction:
// Create Youtube Fragment instance by passing a Youtube Video ID
YoutubeFragment youtubeFragment = YoutubeFragment.newInstance("2zNSgSzhBfM");
getSupportFragmentManager().beginTransaction()
.replace(R.id.flYoutube, youtubeFragment).commit();
And you are done.

You should implement an AppCompatCallback interface.
Please, see my answer.

Autocomplete search bar using Google Places API in a fragment

My app currently looks like this:
I want to add a search bar where I can search any place as Google maps. The search bar should be in an Auto Complete way.I got this code from https://examples.javacodegeeks.com/android/android-google-places-autocomplete-api-example/
Have a look at the above link.
And these codes where for an ORDINARY APP to get Auto Complete search bar. It doesnt suit for app using fragment. And I dont know how to do it with fragments.
Here is my code
For the Main Activity (ProfileActivity)
public class ProfileActivity extends AppCompatActivity {
final String TAG = this.getClass().getName();
BottomBar mBottomBar;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_profile);
mBottomBar = BottomBar.attach(this, savedInstanceState);
mBottomBar.setItemsFromMenu(R.menu.menu_user, new OnMenuTabClickListener() {
#Override
public void onMenuTabSelected(#IdRes int i) {
if(i == R.id.ButtonBarFeed)
{
NewsFragment f = new NewsFragment();
getSupportFragmentManager().beginTransaction().replace(R.id.frame,f).commit();
}
else if(i == R.id.ButtonBarMap)
{
MapFragment f = new MapFragment();
getSupportFragmentManager().beginTransaction().replace(R.id.frame,f).commit();
}
else if(i == R.id.ButtonBarUser)
{
UserFragment f = new UserFragment();
getSupportFragmentManager().beginTransaction().replace(R.id.frame,f).commit();
}
}
#Override
public void onMenuTabReSelected(#IdRes int menuItemId) {
}
});
mBottomBar.mapColorForTab(0,"#28809f");
}
public boolean googleServicesAvailable(){
GoogleApiAvailability api = GoogleApiAvailability.getInstance();
int isAvailable = api.isGooglePlayServicesAvailable(this);
if(isAvailable == ConnectionResult.SUCCESS){
return true;
}else if(api.isUserResolvableError(isAvailable)){
Dialog dialog = api.getErrorDialog(this, isAvailable, 0);
dialog.show();
} else {
Toast.makeText(this,"Can't connet to Play Services", Toast.LENGTH_LONG).show();
}
return false;
}
boolean twice;
#Override
public void onBackPressed() {
Log.d(TAG, "click");
if(twice == true){
Intent intent = new Intent(Intent.ACTION_MAIN);
intent.addCategory(Intent.CATEGORY_HOME);
intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
startActivity(intent);
finish();
System.exit(0);
}
twice = true;
Log.d(TAG, "twice:" + twice);
Toast.makeText(ProfileActivity.this, "Please press BACK again to exit", Toast.LENGTH_SHORT).show();
new Handler().postDelayed(new Runnable() {
#Override
public void run() {
twice = false;
Log.d(TAG, "twice:" + twice);
}
}, 3000);
}
}
MapFragment
public class MapFragment extends Fragment implements OnMapReadyCallback {
#Nullable
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
return inflater.inflate(R.layout.map, container, false);
}
#Override
public void onViewCreated(View view, Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
SupportMapFragment fragment = (SupportMapFragment)getChildFragmentManager().findFragmentById(R.id.mapView1);
fragment.getMapAsync(this);
}
#Override
public void onMapReady(GoogleMap googleMap){
}
}
I have to add a search bar with Auto Complete like Google map.Please with reference of the Link which I have given at starting, Can Anyone code for my MapFragment?

How to create a class or method for multiple instance of webview

I have 3 fragments with their 3 layouts in tablayout. All three layout have their individual webview, swipeRefreshLayout and a progress bar. Currently I copy paste the same code in all three fragments . I want to make a class or a single method such that the changes i make in it will reflect on all three webview setting in the fragment
Below is my fragment, I just copy and paste the code below in all three fragments & only change the url.
public class Yahoo extends Fragment {
final String url = "http://www.yahoo.com/";
private WebView webView;
private ProgressBar progressBar1;
private SwipeRefreshLayout mSwipeRefreshLayout1;
public Yahoo() {
// Required empty public constructor
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
return inflater.inflate(R.layout.fragment_tab13, container, false);
}
#Override
public void onViewCreated(View view, #Nullable Bundle savedInstanceState) {
progressBar1 = (ProgressBar) view.findViewById(R.id.progressBar1);
webView = (WebView) view.findViewById(R.id.website_detail_1);
webView.getSettings().setJavaScriptEnabled(true);
webView.setWebChromeClient(new WebChromeClient() {
public void onProgressChanged(WebView view, int progress) {
progressBar1.setProgress(progress);
if (progress == 100) {
progressBar1.setVisibility(View.GONE);
if (mSwipeRefreshLayout1.isRefreshing()) {
mSwipeRefreshLayout1.setRefreshing(false);
}
} else {
progressBar1.setVisibility(View.VISIBLE);
}
}
});
webView.setWebViewClient(new WebViewClient() {
#Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
view.loadUrl(url);
return true;
}
});
webView.loadUrl(url);
mSwipeRefreshLayout1 = (SwipeRefreshLayout) view.findViewById(R.id.swipe1);
mSwipeRefreshLayout1.setOnRefreshListener(new SwipeRefreshLayout.OnRefreshListener() {
#Override
public void onRefresh() {
webView.loadUrl(url);
}
});
webView.setOnKeyListener(new View.OnKeyListener() {
#Override
public boolean onKey(View v, int keyCode, KeyEvent event) {
if ((keyCode == KeyEvent.KEYCODE_BACK) && webView.canGoBack()) {
webView.goBack();
return true;
}
return false;
}
});
}
#Override
public void onDestroy() {
super.onDestroy();
// Log.d("Yahoo webview", "destroy");
if (webView != null) {
webView.removeAllViews();
webView.destroy();
}
webView = null;
}
}
Could you help me out as how to create a class and and handle objects like webview , progress bar & swipeRefreshLayout such that I dont have to duplicate the same code in all three fragments ?

One thing I can suggest is that you create a single Fragment class, then create 3 instances of it using different urls.
So you will have one fragment class and one layout for it. And then you just instantiate them with different urls (if url is the only difference between them)