I am making an app in which the header and footer would be same through out the app. i can start another activity with the same pattern of design in header and footer but as the other activity starts there comes a delay and we can easily notice that a new activity has pop up.
So what I want :
I want that if user click on any button from the footer the content in the middle between header and footer should be change and user should not see any jump which is made when I move to other activity.
So for this I know that I can use fragments. But for some reasons I can not use fragment activity. All I want to move fragment in the center only. So How can i do that . and How can I initialize other things which are in new fragment let say the upcoming fragment could have button so in this way , I wanted to know would it make my main activity heavy which is calling all these fragment
So please guide me through the demo code .
Note: please do not refer me to a fragment link just past some code to give me some idea.
Will be easiest to have the activity implement the header and footer and the variable content as fragments.
Please refer to this post. It has everything you need
Fixed header and footer in android app
Is it possible to disable an activity elements when it loads a fragments?
I have a program which has an activity and two fragments. I put a container in activity. When I put two buttons in activity and load each fragment by clicking the button, fragment loads on the activity, but when I click in the position of buttons which are under fragment(or in the large screen next to it), they do some actions, however I don't like it. The buttons should not be clickable.
As a simple solution I create a third fragment and put my buttons in it and load it as a default view in the activity.
I was wondering is it possible to do this without using third fragment.
If you do not want clicks to propagate to below layers you can specify android:clickable="true".
In your case define android:clickable="true" in the bottom layout of your fragments layout xml file to stop any clicks to the activity below.
mach's solution is great, but i can suggest a solution that will be helpful if you want to do more actions in the future than just disabling buttons.
You can simply have your activity implement an Interface "OnFragmentLoaded" for example which has a single method onLoaded()
and in your fragment in your onAttach(Activity ac) method you can do the following
((OnFragmentLoaded) ac).onLoaded()
and you activity would implement onLoaded() to do what ever you want
This question is actually a 3 Part Question. Please suggest the valid solution for my problem.
Application Overview
I'm creating an application having a splash screen and a ListView. On click of the launcher icon, first the splash screen is shown and then after 3-4 seconds later, the splash screen calls the ListView activity and user is left with ListView items on the phone screen. On click of each item, respective textual content will be visible to the user. After reading the content user will click the "Back" button and will be returned to hte ListView items section again. If he/she wants to read any other item content, will be taken to that page on the click of that item. If not willing, then will click "Back" button on phone and application will close.
Part 1 - What I actually want to do
I want to show different textual content (not normal text but styled (bold/italized/containing images and all) on the click of different listView items. I can create the html pages and store them in my resource folder locally but don't know how to call those pages while calling onItemClickListener. I'm not sure if this is a valid approach to do this sort of work or not. Please advice. It's not working so far
Part 2 - What I'm doing instead now
Since I was not able to call the textual content so I wrote the content on some text editor, did all the fancy work on the editor and when the content was ready, I took the screenshot and then call that image instead while calling onItemClickListener. It's working fine and I'm able to see the image on click of my ListView item.
Part 3 - The problem I'm facing
When the image is shown to the user, on click of "Back" button, the application is closed instead of going back to the ListView Section. Apparently the image opening on click of the listview item is in the same activity as is the ListView itself. What I want is that user should be able to go back to the ListView section after he/she finishes reading the textual content.
Below is the code of the ListView Activity:
public class MainActivity extends Activity {
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
ListView listView = (ListView) findViewById(R.id.menulist);
String[] values = new String[] { "1. First Article Here", "2. Second Article Here", "3. Third Article Here"};
ArrayAdapter<String> adapter = new ArrayAdapter<String>(this,
R.layout.custom_listview, R.id.text1, values);
// Assign adapter to ListView
listView.setAdapter(adapter);
listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, android.view.View view, int position, long id){
//
if(0==position)
{
setContentView(R.layout.image0);
}
else if (1==position)
{
}
}
});
}
*The code works fine upto setContentView(R.layout.image0);
* But after this I want the application to return back to the ListView section on click of "Back" button but it closes instead. Please guide.
May be it solves by,
Using layout.image0 in another activity and call by intent when click on list item.
By use this, When you click back button you view your previous activity
When you press the back button, the current activity get closed and you get back to the previous activity on the stack. Given that you are not changing activity by pressing the list element, but only changing the layout, pressing the back button empties the stack and closes your app.
The cleanest way would be to launch the splash screen in another activity.
A couple of other ways to solve it are:
- add a stack of fragments
or (the dirtiest way), override the onBackPressed(), intercept it when your app is showing the splash screen and change back the layout to the listview.
I would prefer the other approaches.
If you use setContentView() method, the back button functionality will not work, since no new Activity was created, from which you can go back to the listView. I'd rather take the clicked item's useful information, put it in an Intent (link), and call startActivity() method, to start a new activity, to show content to the user. Then, if the user clicks the back button, the "details" activity will disappear, and the user again sees the listView.
You are using setContentView so its overriding the current view with ur new View in OnItem Click...Rather add a View Group to ur activity like a Relative layout...And when u click your Itme add a new layout to ur existing layout and on back remove the layout.
Or u can Use DialogView to dynamically add a view ..see below:
Dialog dialog = new Dialog(this, android.R.style.Theme_Dialog);
dialog.getWindow().setFlags(WindowManager.LayoutParams.FLAG_NOT_TOUCH_MODAL, 0xff000000);
dialog.requestWindowFeature(Window.FEATURE_NO_TITLE);
dialog.setContentView(Your VIew);
dialog.show();
Or at last you can start Another Intent using your current Activity..
Part 1 and 2
You can create complex and styled layouts using the XML files.
If you really want to use HTML, I advice you to use a WebView. You can store the plain html-string somewhere in your resources and use Webview.loadDataWithBaseUrl() to show it in your WebView.
You can make your choice depending on your functionality. If you have alot of different events to be handled (like clicking on a View), I would opt for the XML files. Because you can assign different listeners to seperate Views. When your functionality doesn't go further as it does now, only clicking a whole view. You can use a WebView as well.
Part 3
The problem is that you are abusing the setContentView-method. setContentView tells Activity which XML file it has to use. In your case, when the Activity is created, it will use R.layout.activity_main.
When you click your item, you tell the Activity.. Don't use the R.layout.activity_main anymore, but use R.layout.image0. The Activity will do this and your image will be shown.
This is not a good way to change layout though and will mess up your working flow. The reason that, when the image is shown, your application closes on Back is that there is only 1 Activity started. (Your stack contains only 1 Activity) You just switched the layout, but no new Activity is started.
Solution
Create 2 Activities:
Create a main Activity showing the your list and set the layout with setContentView(R.layout.activity_main). When your click-event is triggered, you will start the second Activity. Intent i = new Intent(...). You can also add some arguments to the Intent and access them in your second Activity to know which item was clicked and which image to show.
A detail Activity showing your content or in your case an Image. setContentView(R.layout.image0).
Solution 2
Create a popup to show your content. You can use a Dialog for that.
I have a grid type of layout. When the app first loads, there are 3 buttons. I am using "Adapter" for the layout.
ONCLICK of the button, I want to refresh the same activity but with different set of 9 buttons.
Do I start a new Activity in all? OR Make a temporary activity to start the previous activity (and how)?
Since the ONCLICK event is written in the "Adapter" part of the code, starting new activity on click of the button is difficult. (is out of my knowledge).
if you are using adapter i.e., like baseadapter then you can try:
adapter.notifyDataSetChanged();
directly without starting activity again.
If you want the user to go back to the 3 button view on click of Back button, it will be easier to have the 9 buttons in a different Activity.
Otherwise, you can have the 3 buttons and 9 buttons within two different LinearLayouts in the same activity and hide the second layout using setVisibility(LinearLayout.GONE);
On Click of the button, you can hide the first layout and enable the second one using setVisibility(LinearLayout.VISIBLE);
In the adapter class, we can start an activity using context.startActivity(intent) I did not know that we can access "start Activity" from adapter...
but now it's working just fine!!
Thanks a lot for your recommendation...
I have used 2 tabs in my app.
when i click on first tab it is showing an list view( default) and when i click on any particular item in list view it is taking me to the next activity to display the selected data. Here when i click on tab again i want that i should go to the listview screen which is default screen.
but nothing happens on clicking the tab but when i press the back button i m going back on the screen. but i want to go to home list view screen on tab click,
pls help me in this case...
You say you start a new Activity. This one can not call the first Activity where you have the tabs. Am I right that your new activity just shows the two tabs as well?
What you could do is the following:
In the second Activity react to the onclick of the tab. When clicked call finish() to close the Activity.
I am pretty sure, that you don't need to do the following. But I write it, if you need it for something in the future :).
In the first Activity call the next through startActivityForResult(...)
In the first Activity overwrite the onActivityResult method. there you can switch to the tab with the list.