I'm using the popular SlidingMenu library, and the only thing in it is a listview. So I tried using an array adapter to populate it with an ArrayList that I have, but it gives me a NullPointer Exception. So I had a gut feeling that I should try to set the layout of the activity to the layout with the listview, and sure enough, it worked. but that doesn't solve my problem because I need the listview in the DRAWER. Can someone help?
package josh.hutchins.frcmatchscouter2014;
import java.util.ArrayList;
import com.jeremyfeinstein.slidingmenu.lib.SlidingMenu;
import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.Toast;
public class MainActivity extends Activity {
BlueAllianceHandler bah = new BlueAllianceHandler("sc");
FileIoHandler fih = new FileIoHandler(/*maybe pass in folder path here?*/);
ArrayList<String> testTeams = new ArrayList<String>();
ListView drawerListView;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
drawerListView = (ListView) findViewById(R.id.drawerListView);
setupSlidingMenu();
//Toast.makeText(this, bah.pullData(), Toast.LENGTH_LONG).show();
pullTeamData();
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
void setupSlidingMenu(){
SlidingMenu menu = new SlidingMenu(this);
menu.setMode(SlidingMenu.LEFT);
menu.setTouchModeAbove(SlidingMenu.TOUCHMODE_FULLSCREEN);
menu.setShadowWidthRes(R.dimen.shadow_width);
menu.setShadowDrawable(R.drawable.shadow);
menu.setBehindOffsetRes(R.dimen.slidingmenu_offset);
menu.setFadeDegree(0.35f);
menu.attachToActivity(this, SlidingMenu.SLIDING_CONTENT);
menu.setMenu(R.layout.menu);
}
void pullTeamData(){
//JUST FOR TESTING PURPOSES
testTeams.add("2655");
testTeams.add("1533");
testTeams.add("900");
testTeams.add("4451");
testTeams.add("2200");
testTeams.add("3301");
testTeams.add("2059");
testTeams.add("5010");
testTeams.add("1747");
testTeams.add("2641");
testTeams.add("4231");
fih.createTeamRecords(testTeams);
ArrayAdapter<String> arrayAdapter = new ArrayAdapter<String>(
this,
android.R.layout.simple_list_item_1,
testTeams );
drawerListView.setAdapter(arrayAdapter);
}
}
Just follow these steps :
1.Extend SlidingFragmentActivity in your MainActivity instead of just Activity.
2.Make two layouts of FrameLayout type in your layout folder, like this
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/menu_frame"
android:layout_width="match_parent"
android:layout_height="match_parent" />
name layouts as menu_frame, content_frame ,menu_frame will hold the list view that you require and content_frame will hold the content.
3.In your MainActivity , do this.
SlidingMenu menu;
#Override
public void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setBehindContentView(R.layout.menu_frame);
getSupportFragmentManager().beginTransaction()
.replace(R.id.menu_frame, new MenuFragment()).commit();
setContentView(R.layout.content_frame);
getSupportFragmentManager().beginTransaction()
.replace(R.id.content_frame, new ShockFeedsFragment()).commit();
ab=getActionBar();
menu = getSlidingMenu();
menu.setTouchModeAbove(SlidingMenu.TOUCHMODE_MARGIN);
menu.setShadowWidthRes(R.dimen.shadow_width);
menu.setShadowDrawable(R.drawable.shadow);
menu.setBehindOffset(200);
menu.setMode(SlidingMenu.LEFT_RIGHT );
}
Now design the layout for your left menu , just simply include a listview in a linear layout and name your layout as left_menu.
Make a fragment named MenuFragment , extend ragment class , in onCreateView Method , setup your menu list view as shown below
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// TODO Auto-generated method stub
View v=inflater.inflate(R.layout.left_menu, container, false);
lv=(ListView)v.findViewById(R.id.menuListView);
iv=(ImageView)v.findViewById(R.id.imageMenuProfile);
tv=(TextView)v.findViewById(R.id.textViewProfileName);
LeftMenuAdapter adap=new LeftMenuAdapter(getActivity(), list);
//lv.setAdapter(new ArrayAdapter<String>(getActivity().getApplicationContext(),R.layout.ledt_en_row,R.id.textList,new String[] {"H","R","S","B","C","W"}));
lv.setAdapter(adap);
lv.setOnItemClickListener(new MenuListListener());
return v;
}
I have implemented the same library , did it this way , working perfectly , hope it does same for you :)... good luck.
Related
I created a Main activity, which sends me to an ActiviteResultats activity.
My goal is now just to show a message in this activity (Message who come from the main).
I followed the Starting Another Activity tutorial.
The problem is, when I start the ActiviteResultats activity, I have an error:
"no view found for id 0x7f080000 ........... for fragment PlaceholderFragment"
... and the app shuts down.
I don't know yet how to use fragments, and the tutorial says I don't have to use it for this example.
Where am I going wrong?
My code :
package com.example.surveyor;
import android.app.Activity;
import android.app.Fragment;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;
public class ActiviteResultats extends Activity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_activite_resultats);
if (savedInstanceState == null) {
getFragmentManager().beginTransaction()
.add(R.id.container, new PlaceholderFragment()).commit();
}
String message = "TODO";
// Create the text view
TextView textView = new TextView(this);
textView.setTextSize(40);
textView.setText(message);
// Set the text view as the activity layout
setContentView(textView);
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.activite_resultats, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
/**
* A placeholder fragment containing a simple view.
*/
public static class PlaceholderFragment extends Fragment {
public PlaceholderFragment() {
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(
R.layout.fragment_activite_resultats, container, false);
return rootView;
}
}
}
I had the same problem. Just remove the part:
if (savedInstanceState == null) {
getFragmentManager().beginTransaction()
.add(R.id.container, new PlaceholderFragment()).commit();
}
That solved it for me. Hope that helps!
A quick look over the tutorial shows that most of the Fragment code is removed in a later step. You could remove all the code related to the fragments, along with the bit about the options menu if you want to clear out all distractions. It's likely to solve your problem and isn't vital to that tutorial
What you need to do is to set up intent in your main activity, and then get it here so it goes like follows:
under Main_Activity.java
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.Main_Activity);
Intent i = new Intent(this,activiteResultats.class); // or getApplicationContext() <= for context
i.putExtras("TagOfMyMessage","MyMessageblablabla");
startActivity(i);
}
under ActivteResultats.java
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_activite_resultats);
Intent i = getIntent();
String message = i.getStringExtras(); // or something like it
// Create the text view
TextView textView = new TextView(this);
textView.setTextSize(40);
textView.setText(message);
// Set the text view as the activity layout
setContentView(textView);
}
You just don't need to use fragments if you want a clear and easy tutorial i advice you to check this one : http://www.vogella.com/tutorials/AndroidIntent/article.html
I'm trying to build an text view that goes to onClick but its not working they told me to add this code I did it but I'm having a lot of errors in it.
this is my MainActivity.java
package imamalsajadsayings.android.com;
import android.app.Activity;
import android.os.Bundle;
import android.view.Menu;
import android.view.View;
import android.widget.TextView;
public class MainActivity extends Activity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
public void runNextTask(){
final View addView = getLayoutInflater().inflate(R.layout.addnewtracker, null);
final TrackerInfo newInfo = new TrackerInfo();
//set up for model selection
TextView modelTextview = (TextView)addView.findViewById(R.id.state1);
modelTextview.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
}
});
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
}
and is my textview
<TextView
android:id="#+id/state1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/Tracker_model"
android:clickable="true"
note : I don't have addnewtracker created
errors :
Description Resource Path Location Type
TrackerInfo cannot be resolved to a type MainActivity.java /ImamAlsajadsayings/src/imamalsajadsayings/android/com line 20 Java Problem
addnewtracker cannot be resolved or is not a field MainActivity.java /ImamAlsajadsayings/src/imamalsajadsayings/android/com line 19 Java Problem
The method setOnClickListener(View.OnClickListener) in the type View is not applicable for the arguments (new OnClickListener(){}) MainActivity.java /ImamAlsajadsayings/src/imamalsajadsayings/android/com line 23 Java Problem
TrackerInfo cannot be resolved to a type MainActivity.java /ImamAlsajadsayings/src/imamalsajadsayings/android/com line 20 Java Problem
The method onClick(View) of type new OnClickListener(){} must override or implement a supertype method MainActivity.java /ImamAlsajadsayings/src/imamalsajadsayings/android/com line 25 Java Problem
OnClickListener cannot be resolved to a type MainActivity.java /ImamAlsajadsayings/src/imamalsajadsayings/android/com line 23 Java Problem
add to activity:
public void modelTextViewClick(View v) {
//do something on click
}
and to layout:
<TextView android:id="#+id/state1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/Tracker_model"
android:clickable="true"
android:onClick="modelTextViewClick"/>
and remove your on click listener.
Change below code to your XML file
<TextView android:id="#+id/state1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/Tracker_model"
android:clickable="true"
android:onClick="runNextTask"/>
and just modify your java file as follow.
public void runNextTask(View v){
final View addView = getLayoutInflater().inflate(R.layout.addnewtracker, null);
final TrackerInfo newInfo = new TrackerInfo();
//set up for model selection
TextView modelTextview = (TextView)addView.findViewById(R.id.state1);
modelTextview.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
}
});
you need to import this package to avoid this error
missing this -> import android.view.View.OnClickListener;
Use below piece of code.
package imamalsajadsayings.android.com;
import android.app.Activity;
import android.os.Bundle;
import android.view.Menu;
import android.view.View;
import android.widget.TextView;
public class MainActivity extends Activity {
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
public void runNextTask(){
final View addView = getLayoutInflater().inflate(R.layout.addnewtracker, null);
final TrackerInfo newInfo = new TrackerInfo();
//set up for model selection
TextView modelTextview = (TextView)addView.findViewById(R.id.state1);
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
public void modelTextViewClick(View view)
{
// here view reference is your text view reference.
// put your on click handler code.
}
}
difference between this code and your code is onclick handler. In xml you have already defined a on click handler which you have to use in activity code. Other way set onclick listener handler foe your widget. Your doing both but either one of them is allowed not both for any widget in android.
You haven't call runNextTask from ur onCreate()
u r inflating a layout but didn't add that layout in any layout of ur activity_main layout using addView method
thats why it didn't work
it should be
package imamalsajadsayings.android.com;
import android.app.Activity;
import android.os.Bundle;
import android.view.Menu;
import android.view.View;
import android.widget.TextView;
import android.view.View.OnClickListener;
public class MainActivity extends Activity {
private LayoutInflater inflater;
private LinearLayout someLayout;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
someLayout = (LinearLayout) findViewById(R.id.some_layout); //layout present in activity_main
inflater = (LayoutInflater)getSystemService(LAYOUT_INFLATER_SERVICE);
runNextTask();
}
public void runNextTask(){
LinearLayout mInflatedLayout = (LinearLayout) inflater.inflate(R.layout.addnewtracker, null);
final TrackerInfo newInfo = new TrackerInfo();
//set up for model selection
TextView modelTextview = (TextView)mInflatedLayout.findViewById(R.id.state1);
someLayout.addView(mInflatedLayout);
modelTextview.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
}
});
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
}
Assuming u r using LinearLayout in ur activity_main layout
A week later, I am still trying without success to create a tabbed action bar with v7 support to be able to switch between fragments. This is my first effort at an android app in native code and I am new to Java.
My Main.Activity.java looks like this
package com.example.appcompattest;
import android.os.Bundle;
import android.app.Activity;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentTransaction;
import android.view.Menu;
import android.support.v7.app.ActionBar;
import android.support.v7.app.ActionBar.Tab;
import android.support.v7.app.ActionBarActivity;
public class MainActivity extends ActionBarActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// setup action bar for tabs
ActionBar actionBar = getSupportActionBar();
actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
actionBar.setDisplayShowTitleEnabled(true);
Tab tab = actionBar.newTab()
.setText(R.string.grammar)
.setTabListener(new TabListener<GrammarFragment>(
this, "GRAMMAR", GrammarFragment.class));
actionBar.addTab(tab);
tab = actionBar.newTab()
.setText(R.string.lexis)
.setTabListener(new TabListener<LexisFragment>(
this, "LEXIS", LexisFragment.class));
actionBar.addTab(tab);
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
public static class TabListener<T extends Fragment> implements ActionBar.TabListener {
private Fragment mFragment;
private final Activity mActivity;
private final String mTag;
private final Class<T> mClass;
/** Constructor used each time a new tab is created.
* #param activity The host Activity, used to instantiate the fragment
* #param tag The identifier tag for the fragment
* #param clz The fragment's Class, used to instantiate the fragment
*/
public TabListener(Activity activity, String tag, Class<T> clz) {
mActivity = activity;
mTag = tag;
mClass = clz;
}
/* The following are each of the ActionBar.TabListener call backs */
public void onTabSelected(Tab tab, FragmentTransaction ft) {
// Check if the fragment is already initialized
if (mFragment == null) {
// If not, instantiate and add it to the activity
mFragment = Fragment.instantiate(mActivity, mClass.getName());
// Commit the transaction
ft.add(R.id.fragment_holder, mFragment, mTag);
} else {
// If it exists, simply attach it in order to show it
ft.attach( mFragment);
}
}
public void onTabUnselected(Tab tab, FragmentTransaction ft) {
if (mFragment != null) {
// Detach the fragment, because another one is being attached
ft.detach(mFragment);
}
}
public void onTabReselected(Tab tab, FragmentTransaction ft) {
// User selected the already selected tab. Usually do nothing.
}
}
}
Apart from this, I have a Framelayout called fragment_holder in my activity_main.xml to swap the tabs in and out of, and separate xml files for my two fragments. I also have two classes, LexisFragment.java and GrammarFragment.java which are basically the same (with Grammar/grammar substituted for Lexis/lexis) and look like this.
public class LexisFragment extends Fragment {
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
// Inflate the layout for this fragment
return inflater.inflate(R.layout.lexisfragment, container, false);
}
When I run the activity, the first fragment is added. Selecting the other tab causes the the second fragment to be added but without destroying the first. On subsequent tab changes the fragments just remain superimposed.
After logging the variables (mTag and mFragment) at each step and experimenting with ft.remove(), I am pretty sure that what is happening is as follows:
On the first tab change onTabUnselected fails to detach / remove anything while onTabSelected adds the new fragment. Then, on sucessive tab changes, the tab which should be added is removed while the tab which should be removed is added. I am grateful for any suggestions.
Hope this helps you..
public class AboutActivity extends Activity {
boolean mIsFromMem;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
mIsFromMem=savedInstanceState!=null;
}}
I'm trying to make an ImageView, in the Graphical view it shows up but when I run it on my device and the emulator the image doesn't show up. Here's my XML code.
<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" >
<ImageView
android:id="#+id/imageView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_centerVertical="true"
android:scaleType="fitXY"
android:src="#drawable/map_mockup" />
and here's my Fragment1 code (I am using Fragment1 as the Fragment to display this ImageView)
import com.actionbarsherlock.app.SherlockFragment;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.Toast;
import android.app.*;
import android.content.Intent;
public class Fragment1 extends SherlockFragment {
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment1, container, false);
return rootView;
}
}
I hope this is enough, but if you need more code of the application I'll post it.
This is the first time I'm asking a question on Stack Overflow so if I do something wrong PLEASE tell me so I can correct it, so that in the future my questions layout is correct.
Here's the code for the activity I am adding the fragment to.
import android.app.Activity;
import android.os.Bundle;
import com.actionbarsherlock.app.SherlockFragmentActivity;
import com.actionbarsherlock.view.Menu;
import com.actionbarsherlock.view.MenuItem;
import android.support.v4.app.FragmentTransaction;
import android.support.v4.app.Fragment;
import android.content.res.Configuration;
import android.support.v4.app.ActionBarDrawerToggle;
import android.support.v4.widget.DrawerLayout;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ListView;
import android.support.v4.view.GravityCompat;
public class MainActivity extends SherlockFragmentActivity {
// Declare Variable
DrawerLayout mDrawerLayout;
ListView mDrawerList;
ActionBarDrawerToggle mDrawerToggle;
MenuListAdapter mMenuAdapter;
String[] title;
String[] subtitle;
int[] icon;
Fragment fragment1 = new Fragment1();
Fragment fragment2 = new Fragment2();
Fragment fragment3 = new Fragment3();
Fragment fragment4 = new Fragment4();
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.drawer_main);
// Generate title
title = new String[] { "Main", "Nick Honegger",
"Discounts", "About" };
// Generate subtitle
subtitle = new String[] { "Check nearby markets", "View your profile",
"Coupons and deals!", "Find out more!" };
// Generate icon
icon = new int[] { R.drawable.action_about, R.drawable.profile_pic,
R.drawable.collections_cloud, R.drawable.action_about };
// Locate DrawerLayout in drawer_main.xml
mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);
// Locate ListView in drawer_main.xml
mDrawerList = (ListView) findViewById(R.id.left_drawer);
// Set a custom shadow that overlays the main content when the drawer
// opens
mDrawerLayout.setDrawerShadow(R.drawable.drawer_shadow,
GravityCompat.START);
// Pass results to MenuListAdapter Class
mMenuAdapter = new MenuListAdapter(this, title, subtitle, icon);
// Set the MenuListAdapter to the ListView
mDrawerList.setAdapter(mMenuAdapter);
// Capture button clicks on side menu
mDrawerList.setOnItemClickListener(new DrawerItemClickListener());
// Enable ActionBar app icon to behave as action to toggle nav drawer
getSupportActionBar().setHomeButtonEnabled(true);
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
// ActionBarDrawerToggle ties together the the proper interactions
// between the sliding drawer and the action bar app icon
mDrawerToggle = new ActionBarDrawerToggle(this, mDrawerLayout,
R.drawable.ic_drawer, R.string.drawer_open,
R.string.drawer_close) {
public void onDrawerClosed(View view) {
// TODO Auto-generated method stub
super.onDrawerClosed(view);
}
public void onDrawerOpened(View drawerView) {
// TODO Auto-generated method stub
super.onDrawerOpened(drawerView);
}
};
mDrawerLayout.setDrawerListener(mDrawerToggle);
if (savedInstanceState == null) {
selectItem(0);
}
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
getSupportMenuInflater().inflate(R.menu.main, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
if (item.getItemId() == android.R.id.home) {
if (mDrawerLayout.isDrawerOpen(mDrawerList)) {
mDrawerLayout.closeDrawer(mDrawerList);
} else {
mDrawerLayout.openDrawer(mDrawerList);
}
}
return super.onOptionsItemSelected(item);
}
// The click listener for ListView in the navigation drawer
private class DrawerItemClickListener implements
ListView.OnItemClickListener {
#Override
public void onItemClick(AdapterView<?> parent, View view, int position,
long id) {
selectItem(position);
}
}
private void selectItem(int position) {
FragmentTransaction ft = getSupportFragmentManager().beginTransaction();
// Locate Position
switch (position) {
case 0:
ft.replace(R.id.content_frame, fragment1);
break;
case 1:
ft.replace(R.id.content_frame, fragment2);
break;
case 2:
ft.replace(R.id.content_frame, fragment3);
break;
case 3:
ft.replace(R.id.content_frame, fragment4);
}
ft.commit();
mDrawerList.setItemChecked(position, true);
// Close drawer
mDrawerLayout.closeDrawer(mDrawerList);
}
#Override
protected void onPostCreate(Bundle savedInstanceState) {
super.onPostCreate(savedInstanceState);
// Sync the toggle state after onRestoreInstanceState has occurred.
mDrawerToggle.syncState();
}
#Override
public void onConfigurationChanged(Configuration newConfig) {
super.onConfigurationChanged(newConfig);
// Pass any configuration change to the drawer toggles
mDrawerToggle.onConfigurationChanged(newConfig);
}
}
I've tried using Log.d and it shows that Fragment1 is being loaded. I'm stumped, I don't know what to do and am completely lost right here.
If it matters, the resolution for the PNG is 900x1429.
Two things I can think of.
First, I'm not sure if your layout code shows us the whole file or a snippet. If it's the whole file, you're missing a closing tag on the relativeLayout. If it's a snippet then ignore me.
Second, can you post the code for the Activity that you are adding this Fragment to?
Did you try to add the in the onCreateView instead of the xml?That would be the first thing I'd try.Btw I used the same tutorial as you did and consider yourself lucky,mine doesnt even show the image on my device -.-
Please would you try this:
ft.replace(android.R.id.content, fragment1, "frag1");
instead of
ft.replace(R.id.content_frame, fragment1);
?
If this doesn't change anything, I suggest you use Log.d to confirm that your fragment1 is actually being loaded.
Edit:
Good, then follow Arkan's line or reasoning or place a textview in your xml like this, to determine whether or not the xml is being loaded:
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="if you can see me the problem must be with my image"
/>
Does anyone know what to do with this Fragment Tabs Problem?
I am a very novice programmer with not much experience, especially in the world of Android application developing. I recently started a project with fragment tabs and I find that when I try to access a object (for lack of a better word, but I mean like a TextView, Spinner, EditText, etc.) by something like
TextView textBox = (TextView) getView().findViewById(R.id.scouter_name_box);
the compiler finds no errors, but the app crashes. I have tried putting this line of code in a function, in the body of the fragment by itself (after onCreate()), and at the end of onCreate(). This doesn't help. The Error Log also doesn't say anything.
Furthermore, when I comment out this line, the rest of the app runs seamlessly. The app doesn't have any other activities except MainActivity and the three tab Fragments.
WHAT CAN I DO TO ACCESS THE TEXTVIEWS, SPINNERS, ETC?
also, as I mentioned I am very new. If you need a better explanation please ask, and sorry if I don't understand what you are saying at first.
We all have to start somewhere
Please help,
and Thank you in Advance
Tab XML File:
<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" >
<TextView android:id="#+id/input_scouter_name"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_alignParentLeft="true"
android:text="Scouter Name:"
android:textSize="25sp"
android:textStyle="bold" />
<Spinner android:id="#+id/choose_scouter_name"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_toRightOf="#+id/input_scouter_name"
android:entries="#array/scouter_name_list" />
</RelativeLayout>
MainActivity Java File:
import android.app.ActionBar;
import android.app.ActionBar.Tab;
import android.app.Activity;
import android.os.Bundle;
public class MainActivity extends Activity {
// Declare Tab Variable
Tab tab;
ScoutingData ScoutData;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// Create the actionbar
ActionBar actionBar = getActionBar();
// Hide Actionbar Icon
actionBar.setDisplayShowHomeEnabled(true);
actionBar.setIcon(R.drawable.red_and_blue_frisbees);
// Hide Actionbar Title
actionBar.setDisplayShowTitleEnabled(true);
// Create Actionbar Tabs
actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
// Create Home Tab
tab = actionBar.newTab().setTabListener(new FragmentsTab0());
// Set Tab Title
tab.setText("General");
actionBar.addTab(tab);
// Create first Tab
tab = actionBar.newTab().setTabListener(new FragmentsTab1());
// Set Tab Title
tab.setText("Autonomous");
actionBar.addTab(tab);
// Create Second Tab
tab = actionBar.newTab().setTabListener(new FragmentsTab2());
// Set Tab Title
tab.setText("Teleop");
actionBar.addTab(tab);
// Create Third Tab
tab = actionBar.newTab().setTabListener(new FragmentsTab3());
// Set Tab Title
tab.setText("Endgame");
actionBar.addTab(tab);
}
}
Tab Java File:
import android.app.ActionBar;
import android.app.ActionBar.Tab;
import android.app.Fragment;
import android.app.FragmentTransaction;
import android.os.Bundle;
import android.widget.Spinner;
public class FragmentsTab0 extends Fragment implements ActionBar.TabListener {
private Fragment mFragment;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// Get the view from tab0fragment.xml
getActivity().setContentView(R.layout.tab0fragment);
}
public void onTabSelected(Tab tab, FragmentTransaction ft) {
// TODO Auto-generated method stub
mFragment = new FragmentsTab0();
// Attach tab0fragment.xml layout
ft.add(android.R.id.content, mFragment);
ft.attach(mFragment);
}
public void onTabUnselected(Tab tab, FragmentTransaction ft) {
// TODO Auto-generated method stub
// Remove tab0fragment.xml layout
ft.remove(mFragment);
}
public void onTabReselected(Tab tab, FragmentTransaction ft) {
// TODO Auto-generated method stub
}
//Heeere's the Problem
Spinner scouterName = (Spinner) getView().findViewById(R.id.choose_scouter_name);
}
First off, remove Spinner scoutername = (Spinner) getView().findViewById(R.id.choose_scouter_name). Secondly, remove getActivity().setContentView(R.layout.tab0fragment); from your onCreate(). You want to inflate your xml within onCreateView and then use that view to get the id of your other views. For example:
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view;
if (container == null) {
return null;
}
view = inflater.inflate(R.layout.tab0fragment, container, false);
Spinner scouterName = (Spinner) view.findViewById(R.id.choose_scouter_name);
}