You should consider what you plan to do with the fragment to decide which path to follow.  If you use a FragmentTransaction to hide the fragment, then it can still be in the running state of its lifecycle, but its UI has been detached from the window so it&#39;s no longer visible.  So you could technically still interact with the fragment and reattach its UI later you need to.  If you replace the fragment, the you are actually pulling it out of the container and it will go through all of the teardown events in the lifecycle (onPause, onStop, etc) and if for some reason you need that fragment again you would have to insert it back into the container and let it run through all of its initialization again.  &lt;br /&gt;&lt;br /&gt;
If there is a high probability that you will need that fragment again, then just hide it because it&#39;s a less expensive operation to redraw it&#39;s layout than to completely reinitialize it.

You basically answered yourself. If you want to replace (so old fragment is no longer needed) use `replace()` if you want to temporary hide it then do `hide()`.


I used hide/Show method in my activity with 4 fragments its solved my solution but some time randomly when i show my dialog it give window bad token exception when i used add and replace method then bad token exception is not occur so i think show/hide method is not perfect  


If the view is &quot;heavy&quot; I think the hide/show should be used. There is such callback: onHiddenChanged. If you use hide/show it would be helpful.

Is there a way to temporarily expand a split pane into full tab and go back again when done?
I am looking for a keyboard shortcut to do so. The use case is to be able to temporarily switch to full-screen on demand.

iTerm2: How to expand split pane temporarily?

How do I show a message box with Yes/No buttons in Qt, and how do I check which of them was pressed?

I.e. a message box that looks like this:

![enter image description here][1]

  [1]: http://i.stack.imgur.com/h92PA.png

Yes/No message box using QMessageBox

Suppose I wish to replace the current fragment in some container view with another. Is it better to use replace...

        FragmentTransaction ft = getSupportFragmentManager().beginTransaction();
        ft.replace(R.id.fragment_container, newFragment, null);
        ft.commit();

... or the following, with show and hide?

        FragmentTransaction ft = getSupportFragmentManager().beginTransaction();
        ft.hide(oldFragment);
        ft.show(newFragment);
        ft.commit();

Is one way of doing this more efficient? Can&#39;t find much information on when to use these methods, or how they affect the lifecycle of the fragments involved.
Thanks!


Android Fragments: When to use hide/show or add/remove/replace?

Suppose I wish to replace the current fragment in some container view with another. Is it better to use replace...
<pre><code class="hljs language-ini"> FragmentTransaction ft = getSupportFragmentManager().beginTransaction();
 ft.replace(R.id.fragment_container, newFragment, null);
 ft.commit();
</code></pre>
... or the following, with show and hide?
<pre><code class="hljs language-ini"> FragmentTransaction ft = getSupportFragmentManager().beginTransaction();
 ft.hide(oldFragment);
 ft.show(newFragment);
 ft.commit();
</code></pre>
Is one way of doing this more efficient? Can't find much information on when to use these methods, or how they affect the lifecycle of the fragments involved.
Thanks!

I want to place an image button inside of EditText, but I don&#39;t have Idea please tell me how to do so as shown in the figure . Thanks

![enter image description here][1]


  [1]: http://i.stack.imgur.com/Cvjq0.png

How to place button inside of EditText

In my app I have a requirement to generate an MD5 checksum for a file. Could you please tell me if there is any way in which this can be achieved?

Thank you.

How to generate an MD5 checksum for a file in Android?

Is there any solution for Android devices similar to the iOS 6 smart app banner?

**Here is the code for smart app banner**

    &lt;meta name=&quot;apple-itunes-app&quot; content=&quot;app-id=311507490, affiliate-data=partnerId=30&amp;siteID=k1CkFsOh4nQ&quot;/&gt;

Creating an android smart app banner

&gt; **Possible Duplicate:**  
&gt; [Standard Android menu icons, for example refresh](https://stackoverflow.com/questions/2687027/standard-android-menu-icons-for-example-refresh)  

&lt;!-- End of automatically inserted text --&gt;

Where can I find the name of the default Android menu icons (like refresh or compose)?

The code below has an error stating that the resource is not public

    &lt;item
        android:id=&quot;@+id/preference&quot;
        android:icon=&quot;@android:drawable/ic_menu_refresh&quot;
        android:showAsAction=&quot;ifRoom&quot; /&gt;

Where can I find Android&#39;s default icons?

Is there a way to get the details of the current activity that is running via adb.


ADB - Android - Getting the name of the current activity

I&#39;m getting the following error: ***&quot;The method getSupportFragmentManager() is undefined for the type new View.OnClickListener(){}&quot;*** in my fragment file shown below.

I have the compatibility library referenced through ABS and the proper imports in place. I reinstalled ABS library w/ the compatibility library, cleaned the project, restarted Eclipse, but nothing has worked.

Essentially, I&#39;m trying to get the fragment to show a date picker through a dialog fragment. Once the date is picked, it must be returned to the fragment so it can be used to calculate information based on that date.

Here&#39;s the code for my Fragment:

    package com.owentech.abstabsviewpager;

    import android.app.Activity;
    import android.app.Dialog;
    import android.os.Bundle;
    import android.view.LayoutInflater;
    import android.view.View;
    import android.view.View.OnClickListener;
    import android.view.ViewGroup;
    import android.widget.Button;
    import android.widget.Toast;
    import android.support.v4.app.DialogFragment;
    import android.support.v4.app.FragmentManager;
    import android.support.v4.app.FragmentPagerAdapter;
    import android.support.v4.app.FragmentActivity;
    import android.support.v4.app.Fragment;
    import android.support.v4.app.FragmentTransaction;
    import com.actionbarsherlock.app.SherlockFragment;

    public class ObstetricsFragment1 extends SherlockFragment{
	
	@Override
	public View onCreateView(LayoutInflater inflater, ViewGroup container,
			Bundle savedInstanceState)
	{
		//Fragment Layout
		View view = inflater.inflate(R.layout.obstetricsfragment1, container, false);
		
        Button mPickLMPDate = (Button) view.findViewById(R.id.pickLMPDate);
		
        mPickLMPDate.setOnClickListener(new OnClickListener() {
        	@Override
            public void onClick(View v) {
        		LMPDatePickerDialogFragment d = LMPDatePickerDialogFragment.newInstance();
        	    d.show(getSupportFragmentManager(), &quot;dialog&quot;);
            }
            
        });
        
		return view;
	}

	public Dialog onCreateDialog(Bundle savedInstanceState) {
		// TODO Auto-generated method stub
		return null;
	}
	
    }

Here&#39;s the code for the Dialog Fragment: 

    package com.owentech.abstabsviewpager;

    import android.app.Dialog;
    import android.os.Bundle;
    import android.widget.DatePicker;
    import android.app.DatePickerDialog;

    public class LMPDatePickerDialogFragment extends ObstetricsFragment1 implements DatePickerDialog.OnDateSetListener {
	
    static LMPDatePickerDialogFragment newInstance() {
    	LMPDatePickerDialogFragment d = new LMPDatePickerDialogFragment();
        return d;
    }
    
    private int mLMPYear;
    private int mLMPMonth;
    private int mLMPDay;

    public Dialog onCreateDialog(Bundle savedInstanceState) {
        return new DatePickerDialog(getActivity(), this, mLMPYear, mLMPMonth, mLMPDay);
    }

    public void onDateSet(DatePicker view, int year, int month, int day) {
    	mLMPYear = year;
        mLMPMonth = month;
        mLMPDay = day;
    }
    }


Finally, here&#39;s the code for the my activity:

    package com.owentech.abstabsviewpager;

    import java.util.ArrayList;
    import android.content.Context;
    import android.content.Intent;
    import android.net.Uri;
    import android.os.Bundle;
    import com.actionbarsherlock.view.Menu;
    import com.actionbarsherlock.view.MenuInflater;
    import android.widget.TextView;
    import com.actionbarsherlock.app.ActionBar;
    import com.actionbarsherlock.app.SherlockFragmentActivity;
    import com.actionbarsherlock.app.ActionBar.Tab;
    import android.support.v4.app.Fragment;
    import android.support.v4.app.FragmentPagerAdapter;
    import android.support.v4.app.FragmentTransaction;
    import android.support.v4.app.Fragment;
    import android.support.v4.view.ViewPager;


    public class Obstetrics extends SherlockFragmentActivity
    {
	ViewPager mViewPager;
	TabsAdapter mTabsAdapter;
	TextView tabCenter;
	TextView tabText;
	
	// START Action Bar Menu Items	
	@Override
    public boolean onCreateOptionsMenu(Menu menu) {
       MenuInflater inflater = getSupportMenuInflater();
       inflater.inflate(R.menu.main_menu, menu);
       return super.onCreateOptionsMenu(menu);
    }
    
	@Override
    public boolean onOptionsItemSelected(com.actionbarsherlock.view.MenuItem item) {
    	switch (item.getItemId()){
    	case R.id.menuLog:
    		ChangeLog cl = new ChangeLog(this);
        	cl.getFullLogDialog().show();
    		return true;
    	case R.id.menuEmail:
    		Intent emailIntent = new Intent(Intent.ACTION_VIEW, Uri.parse(&quot;mailto:support@medicaldoctorapps.com&quot;));
    		startActivity(emailIntent);
    		return true;
    	case R.id.menuRate:
    		Intent browserIntent = new Intent(Intent.ACTION_VIEW, Uri.parse(&quot;https://play.google.com/store/apps/details?id=appinventor.ai_shawn_m_gee.MedicalDoctor&quot;));
    		startActivity(browserIntent);
    		return true;
        case android.R.id.home:
            // App icon in action bar clicked; go home
            Intent intent = new Intent(this, Home.class);
            intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
            startActivity(intent);
            return true;
    	case R.id.menuExit:
    		this.finish();
    		return true;
        default:
            return super.onOptionsItemSelected(item);
    	}
    }      
	//END Action Bar Menu Items
	
	// START Tabs View Pager (Add tabs by adding mTabsAdapter.addTab)	
	@Override
	public void onCreate(Bundle savedInstanceState)
	{
	
		// Information you want returned to your application, via onCreate(), if the activity is destroyed and restarted due to some implicit reason		
		super.onCreate(savedInstanceState);
		
		mViewPager = new ViewPager(this);
		mViewPager.setId(R.id.pager);

		setContentView(mViewPager);
		ActionBar bar = getSupportActionBar();
		bar.setDisplayHomeAsUpEnabled(true);
		bar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
		mTabsAdapter = new TabsAdapter(this, mViewPager);

		mTabsAdapter.addTab(
				bar.newTab().setText(&quot;Wheel&quot;),
				ObstetricsFragment1.class, null);
		mTabsAdapter.addTab(
				bar.newTab().setText(&quot;Physical&quot;),
				HistoryPhysicalFragment2.class, null);
		mTabsAdapter.addTab(
				bar.newTab().setText(&quot;ROS&quot;),
				HistoryPhysicalFragment3.class, null);
		mTabsAdapter.addTab(
				bar.newTab().setText(&quot;CAGE&quot;),
				HistoryPhysicalFragment4.class, null);
		mTabsAdapter.addTab(
				bar.newTab().setText(&quot;SIGECAPS&quot;),
				HistoryPhysicalFragment5.class, null);
		mTabsAdapter.addTab(
				bar.newTab().setText(&quot;Glasgow&quot;),
				HistoryPhysicalFragment6.class, null);
		mTabsAdapter.addTab(
				bar.newTab().setText(&quot;Neuro&quot;),
				HistoryPhysicalFragment7.class, null);
		mTabsAdapter.addTab(
				bar.newTab().setText(&quot;Dermat&quot;),
				HistoryPhysicalFragment8.class, null);
		mTabsAdapter.addTab(
				bar.newTab().setText(&quot;Minicog&quot;),
				HistoryPhysicalFragment9.class, null);
	}
	
	public static class TabsAdapter extends FragmentPagerAdapter implements
			ActionBar.TabListener, ViewPager.OnPageChangeListener
	{
		private final Context mContext;
		private final ActionBar mActionBar;
		private final ViewPager mViewPager;
		private final ArrayList&lt;TabInfo&gt; mTabs = new ArrayList&lt;TabInfo&gt;();

		static final class TabInfo
		{
			private final Class&lt;?&gt; clss;
			private final Bundle args;

			TabInfo(Class&lt;?&gt; _class, Bundle _args)
			{
				clss = _class;
				args = _args;
			}
		}

		public TabsAdapter(SherlockFragmentActivity activity, ViewPager pager)
		{
			super(activity.getSupportFragmentManager());
			mContext = activity;
			mActionBar = activity.getSupportActionBar();
			mViewPager = pager;
			mViewPager.setAdapter(this);
			mViewPager.setOnPageChangeListener(this);
		}

		public void addTab(ActionBar.Tab tab, Class&lt;?&gt; clss, Bundle args)
		{
			TabInfo info = new TabInfo(clss, args);
			tab.setTag(info);
			tab.setTabListener(this);
			mTabs.add(info);
			mActionBar.addTab(tab);
			notifyDataSetChanged();
		}

		@Override
		public int getCount()
		{
			return mTabs.size();
		}

		@Override
		public Fragment getItem(int position)
		{
			TabInfo info = mTabs.get(position);
			return Fragment.instantiate(mContext, info.clss.getName(),
					info.args);
		}

		public void onPageScrolled(int position, float positionOffset,
				int positionOffsetPixels)
		{
		}

		public void onPageSelected(int position)
		{
			mActionBar.setSelectedNavigationItem(position);
		}

		public void onPageScrollStateChanged(int state)
		{
		}

		public void onTabSelected(Tab tab, FragmentTransaction ft)
		{
			Object tag = tab.getTag();
			for (int i = 0; i &lt; mTabs.size(); i++)
			{
				if (mTabs.get(i) == tag)
				{
					mViewPager.setCurrentItem(i);
				}
			}
		}

		public void onTabUnselected(Tab tab, FragmentTransaction ft)
		{
		}

		public void onTabReselected(Tab tab, FragmentTransaction ft)
		{
		}
	}
	// END Tabs View Pager
	
    }


getSupportFragmentManager() is undefined

My application has a Fragment inside its Activity. I would like to programmatically replace the fragment by another one from the current fragment itself.

For example, if I click on a button inside the fragment, the fragment should be replaced with another one, but the activity should remain the same.

Is it possible? If so, how to do it?

How to replace the activity&#39;s fragment from the fragment itself?

     
    public class MainActivity extends Activity implements MainMenuFragment.OnMainMenuItemSelectedListener {

	 @Override
	 public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);

		FragmentManager fragmentManager = getFragmentManager();
		FragmentTransaction fragmentTransaction = fragmentManager
				.beginTransaction();

		// add menu fragment
		MainMenuFragment myFragment = new MainMenuFragment();
		fragmentTransaction.add(R.id.menu_fragment, myFragment);

		//add content
		DetailPart1 content1= new DetailPart1 ();
		fragmentTransaction.add(R.id.content_fragment, content1);
		fragmentTransaction.commit();

	}
    public void onMainMenuSelected(String tag) {
      //next menu is selected replace existing fragment
    }


I have a need to display two list views side by side, menu on left and its content on right side. By default, the first menu is selected and its content is displayed on right side. The Fragment that displays content is as below:

    public class DetailPart1 extends Fragment {
      ArrayList&lt;HashMap&lt;String, String&gt;&gt; myList = new ArrayList&lt;HashMap&lt;String, String&gt;&gt;();
      ListAdapter adap;
      ListView listview;
     
      @Override
	  public void onActivityCreated(Bundle savedInstanceState) {
		  super.onActivityCreated(savedInstanceState);
         
           if(savedInstanceState!=null){
	        myList = (ArrayList)savedInstanceState.getSerializable(&quot;MYLIST_obj&quot;);
	        adap = new LoadImageFromArrayListAdapter(getActivity(),myList );
	        listview.setAdapter(adap);
           }else{
	        //get list and load in list view
	        getlistTask = new GetALLListTasks().execute();
        }

       
         @Override
	   public View onCreateView(LayoutInflater inflater, ViewGroup container,
			Bundle savedInstanceState) {
		View v = inflater.inflate(R.layout.skyview_fragment, container,false);
               return v;
		    }


         @Override
          public void onSaveInstanceState(Bundle outState) {
             super.onSaveInstanceState(outState);
              outState.putSerializable(&quot;MYLIST_obj&quot;, myList );
            }
        }
	 

The onActivityCreated and onCreateView are called **twice**. There are many examples out there using fragments. Since I am beginner in this subject, I am unable relate the example with my problem. I need a fool proof way to handle orientation change. I have NOT declared `android:configChanges` in manifest file. I need the activity destroy and recreate so that I can use different layout in landscape mode.

Fool-proof way to handle Fragment on orientation change

I have a `ViewPager` with three `Fragments`, each one shows a `List` (or `Grid`).

In the new `Android API level 17` (Jelly Bean 4.2), one of the features is [Nested Fragments][1]. The new functionality description says: 

&gt; if you use ViewPager to create fragments that swipe left and right and
&gt; consume a majority of the screen space, you can now insert fragments
&gt; into each fragment page.

So, if I understand right, now I can create a `ViewPager` with `Fragments` (with a button inside for example) inside, and when user press the button show another `Fragment` without loose the `ViewPager` using this new feature.

I&#39;ve expended my morning trying to implement this several different ways, but I can&#180;t get it working... Can somebody add a simple example of how to implement this?

PS: I&#39;m only interested in doing at this way, with `getChildFragmentManager` to learn how works.


  [1]: http://developer.android.com/about/versions/android-4.2.html#NestedFragments

How to add a Fragment inside a ViewPager using Nested Fragment (Android 4.2)

I sometimes get the following exception when working with Fragments:

&lt;!-- language: lang-none --&gt;

    FATAL EXCEPTION: main
    java.lang.NullPointerException
        at android.support.v4.app.BackStackRecord.run(BackStackRecord.java:591)
        at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1416)
        at android.support.v4.app.FragmentManagerImpl$1.run(FragmentManager.java:420)
        at android.os.Handler.handleCallback(Handler.java:615)
        at android.os.Handler.dispatchMessage(Handler.java:92)
        at android.os.Looper.loop(Looper.java:137)
        at android.app.ActivityThread.main(ActivityThread.java:4745)
        at java.lang.reflect.Method.invokeNative(Native Method)
        at java.lang.reflect.Method.invoke(Method.java:511)
        at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
        at dalvik.system.NativeStart.main(Native Method)

The exception occurs when `run()` of `BackStackRecord` is called through `execPendingTransactions()`, when it tries to remove a fragment from the manager.

    case OP_REMOVE: {
      Fragment f = op.fragment;
      f.mNextAnim = op.exitAnim; &lt;----
      mManager.removeFragment(f, mTransition, mTransitionStyle);
    }
    break;

I can&#39;t seem to figure out what exactly is causing this? I think it has to do with the backstack of fragments not being cleaned up right when removing fragments.

Content Type	Original Author	Original Content on Stackoverflow
Question	Robert Karl	View Question on Stackoverflow
Solution 1 - Android	David C. Sainte-Claire	View Answer on Stackoverflow
Solution 2 - Android	Marcin Orlowski	View Answer on Stackoverflow
Solution 3 - Android	Dishant Kawatra	View Answer on Stackoverflow
Solution 4 - Android	Vahan	View Answer on Stackoverflow

Android Fragments: When to use hide/show or add/remove/replace?

Android Problem Overview

Android Solutions

Solution 1 - Android

Solution 2 - Android

Solution 3 - Android

Solution 4 - Android

Yes/No message box using QMessageBox

iTerm2: How to expand split pane temporarily?

Attributions