Develop Reference

How to launch activity based on tab bar item?

I want to start different activities depending on the click of the tab bar item but I get a blank page as started activity in the "windows class". What I intended to do is start different activities on click of tab bar item.
Tab Bar Activity Class
import android.app.ActionBar;
import android.app.Activity;
import android.app.FragmentTransaction;
import android.content.Intent;
import android.os.Bundle;
import android.support.v4.app.FragmentActivity;
import android.support.v4.view.ViewPager;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.TabHost;
public class TabBar extends FragmentActivity {
ViewPager Tab;
TabPagerAdapter TabAdapter;
ActionBar actionBar;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.tabbardefault);
try {
TabAdapter = new TabPagerAdapter(getSupportFragmentManager());
Tab = (ViewPager) findViewById(R.id.pager);
Tab.setOnPageChangeListener(
new ViewPager.SimpleOnPageChangeListener() {
#Override
public void onPageSelected(int position) {
actionBar = getActionBar();
actionBar.setSelectedNavigationItem(position);
}
});
Tab.setAdapter(TabAdapter);
actionBar = getActionBar();
//Enable Tabs on Action Bar
actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
}
catch (Exception e)
{
}
ActionBar.TabListener tabListener = new ActionBar.TabListener(){
#Override
public void onTabReselected(android.app.ActionBar.Tab tab,
FragmentTransaction ft) {
// TODO Auto-generated method stub
}
#Override
public void onTabSelected(ActionBar.Tab tab, FragmentTransaction ft) {
Tab.setCurrentItem(tab.getPosition());
}
#Override
public void onTabUnselected(android.app.ActionBar.Tab tab,
FragmentTransaction ft) {
// TODO Auto-generated method stub
}};
//Add New Tab
actionBar.addTab(actionBar.newTab().setText("Home").setTabListener(tabListener));
actionBar.addTab(actionBar.newTab().setText("Celeb").setTabListener(tabListener));
actionBar.addTab(actionBar.newTab().setText("Videos").setTabListener(tabListener));
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_tab_bar, 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();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
}
TabPagerAdapter
import android.content.Intent;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentStatePagerAdapter;
public class TabPagerAdapter extends FragmentStatePagerAdapter {
public TabPagerAdapter(FragmentManager fm) {
super(fm);
// TODO Auto-generated constructor stub
}
#Override
public Fragment getItem(int i) {
switch (i) {
case 0:
//Fragement for Android Tab
return new Android();
case 1:
//Fragment for Ios Tab
return new Ios();
case 2:
//Fragment for Windows Tab
return new Windows();
}
return null;
}
#Override
public int getCount() {
// TODO Auto-generated method stub
return 3; //No of Tabs
}
}
Windows
public class Windows extends Fragment {
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View windows = inflater.inflate(R.layout.feed_main, container, false);
//((TextView)windows.findViewById(R.id.textView)).setText("Windows");
return windows;
}}

To answer you, you are not actually starting an Activity you a switching through Fragments, Fragment is just a Custom View, and you inflate an xml to represent the Custom View which is the Fragment, if you want to start an Activity after your Tab is selected then you call startActivity(Intent); startActivity(new Intent(classname.this,the_class_i_want_to_start.class));
and your Windows class extends Fragment it should be Activity if what you want is the functionality of Fragment then you aint got a problem
hope its lucid

ActionBar error "incompatible types"

I am stuck with making tabs using ActionBar. When I make it to run app with some code changes, my app crashes instantly without even starting. The current code is closest to working where I could get. This is MainActivity here:
import android.app.FragmentTransaction;
import android.support.v4.view.ViewPager;
import android.os.Bundle;
import android.view.Menu;
import android.support.v4.app.FragmentActivity;
import android.support.v7.app.ActionBar.Tab;
import android.app.ActionBar;
public class MainActivity extends FragmentActivity implements ActionBar.TabListener {
ActionBar actionbar;
ViewPager viewpager;
FragmentPageAdapter ft;
FragmentPageAdapter mAdapter;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
viewpager = (ViewPager) findViewById(R.id.pager);
ft = new FragmentPageAdapter(getSupportFragmentManager());
mAdapter = new FragmentPageAdapter(getSupportFragmentManager());
//final ActionBar actionBar = getActionBar();
//final ActionBar actionBar = getSupportActionBar();
actionbar = getActionBar();
viewpager.setAdapter(ft);
actionbar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
actionbar.addTab(actionbar.newTab().setText("DotNet").setTabListener(this));
actionbar.addTab(actionbar.newTab().setText("Eal").setTabListener(this));
actionbar.addTab(actionbar.newTab().setText("Neowin").setTabListener(this));
actionbar.addTab(actionbar.newTab().setText("PcWorld").setTabListener(this));
viewpager.setOnPageChangeListener(new ViewPager.OnPageChangeListener() {
#Override
public void onPageSelected(int arg0) {
actionbar.setSelectedNavigationItem(arg0);
}
#Override
public void onPageScrolled(int arg0, float arg1, int arg2) {
// TODO Auto-generated method stub
}
#Override
public void onPageScrollStateChanged(int arg0) {
// TODO Auto-generated method stub
}
});
}
#Override
public void onTabSelected(ActionBar.Tab tab, FragmentTransaction ft) {
// TODO Auto-generated method stub
}
#Override
public void onTabReselected(ActionBar.Tab tab, FragmentTransaction ft) {
// TODO Auto-generated method stub
}
#Override
public void onTabUnselected(ActionBar.Tab tab, FragmentTransaction ft) {
// TODO Auto-generated method stub
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_main, menu);
return true;
}
}

Adding drawable image into ActionBar.Tab

I'm developing Android Application.there i have to use Swipe Views with Tabs .
i want to add drawable image(non_click image) when tabs load & press the tab there will be another image of same tab (click_state image) .Please find below the code I used.please help me to do it
package com.example.creatingswipeviewswithtabs;
import android.os.Bundle;
import android.app.ActionBar;
import android.app.ActionBar.Tab;
import android.app.ActionBar.TabListener;
import android.app.Activity;
import android.app.FragmentTransaction;
import android.view.Menu;
public class MainActivity extends Activity implements TabListener {
ActionBar action_bar;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
action_bar=getActionBar();
//action_bar.setBackgroundDrawable(d)
action_bar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
ActionBar.Tab tab1=action_bar.newTab();
tab1.setText("Login");
tab1.setTabListener(this);
ActionBar.Tab tab2=action_bar.newTab();
tab2.setText("Compare Now");
tab2.setTabListener(this);
ActionBar.Tab tab3=action_bar.newTab();
tab3.setText("Search");
tab3.setTabListener(this);
action_bar.addTab(tab1);
action_bar.addTab(tab2);
action_bar.addTab(tab3);
}
#Override
public void onTabReselected(Tab arg0, FragmentTransaction arg1) {
// TODO Auto-generated method stub
}
#Override
public void onTabSelected(Tab tab, FragmentTransaction ft) {
// TODO Auto-generated method stub
}
#Override
public void onTabUnselected(Tab tab, FragmentTransaction ft) {
// TODO Auto-generated method stub
}
}

tabs is an array for Tab Strings
for (String tab_name : tabs) {
actionBar.addTab(actionBar.newTab().setText(tab_name).setTabListener(this).setIcon(R.drawable.ic_launcher));
}

i am using action bar tabs,i want to switch from one activity to another activity,how can i call the activity with in tabs

//I am using action bar tabs in my app,I want to switch from one activity to another activity with in tabs when I press on tabs,how can I call the activity with in tabs. I want to display any activity with in actionbar tabs.
public class MainActivity extends Activity implements TabListener {
// Refresh menu item
private MenuItem action_search;
Tab tab1, tab2, tab3;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
//creating tabs
ActionBar actionBar = getActionBar();
actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
//adding tabs to actionbar
tab1 = actionBar.newTab();
tab1.setText("camera");
tab1.setTabListener(this);
actionBar.addTab(tab1);
tab2 = actionBar.newTab();
tab2.setText("contacts");
tab2.setTabListener(this);
actionBar.addTab(tab2);
}
#Override
public void onTabReselected(Tab tab, FragmentTransaction ft) {
// TODO Auto-generated method stub
}
#TargetApi(Build.VERSION_CODES.HONEYCOMB)
#Override
public void onTabSelected(Tab tab, FragmentTransaction ft) {
// TODO Auto-generated method stub
switch (tab.getPosition()) {
case 0:
Intent i = new Intent(getApplicationContext(), MainActivity2.class);
startActivity(i);
break;
case 1:
Intent i = new Intent(getApplicationContext(), MainActivity2.class);
startActivity(i);
break;
}
}
#Override
public void onTabUnselected(Tab tab, FragmentTransaction ft) {
// TODO Auto-generated method stub
}
}

MainActivity.java
package com.example.moviesswipe;
import android.annotation.SuppressLint;
import android.app.ActionBar;
import android.app.ActionBar.Tab;
import android.os.Bundle;
import android.support.v4.app.FragmentActivity;
import android.support.v4.app.FragmentTransaction;
import android.support.v4.view.ViewPager;
import android.view.Menu;
#SuppressWarnings("unused")
#SuppressLint("NewApi")
public class MainActivity extends FragmentActivity implements
ActionBar.TabListener {
private ViewPager viewPager;
private TabsPagerAdapter mAdapter;
private ActionBar actionBar;
private String[] tabs = { "English", "Tamil", "Hindi" };
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
viewPager = (ViewPager) findViewById(R.id.pager);
actionBar = getActionBar();
mAdapter = new TabsPagerAdapter(getSupportFragmentManager());
viewPager.setAdapter(mAdapter);
actionBar.setHomeButtonEnabled(false);
actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
for (String tab_name : tabs) {
actionBar.addTab(actionBar.newTab().setText(tab_name)
.setTabListener(this));
}
viewPager.setOnPageChangeListener(new ViewPager.OnPageChangeListener() {
#Override
public void onPageSelected(int position) {
actionBar.setSelectedNavigationItem(position);
}
#Override
public void onPageScrolled(int arg0, float arg1, int arg2) {
}
#Override
public void onPageScrollStateChanged(int arg0) {
}
});
}
#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;
}
#Override
public void onTabReselected(Tab tab, android.app.FragmentTransaction ft) {
// TODO Auto-generated method stub
}
#Override
public void onTabSelected(Tab tab, android.app.FragmentTransaction ft) {
// TODO Auto-generated method stub
viewPager.setCurrentItem(tab.getPosition());
}
#Override
public void onTabUnselected(Tab tab, android.app.FragmentTransaction ft) {
// TODO Auto-generated method stub
}
}
TabsPagerAdapter.java
package com.example.moviesswipe;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentPagerAdapter;
public class TabsPagerAdapter extends FragmentPagerAdapter {
public TabsPagerAdapter(FragmentManager fm) {
super(fm);
// TODO Auto-generated constructor stub
}
#Override
public Fragment getItem(int index) {
switch (index) {
case 0:
return new English();
case 1:
return new Tamil();
case 2:
return new Hindi();
}
return null;
}
#Override
public int getCount() {
// TODO Auto-generated method stub
return 3;
}
}
Here i placed three tabs , for each tab i created three activity.
English.java , Tamil.java and Hindi.java
sample one:
package com.example.moviesswipe;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
#SuppressWarnings("unused")
public class English extends Fragment{
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.english, container, false);
return rootView;
}
}
For each class you need to create a layout:
No need to entry these classes in your manifest coz these are all fragments.
Try it like this dude :) Happy coding :)
Say if there any queries.

Local Variable fm Cannot Be Resolved to a Type

In my app, I am creating tabs that use Fragments and a pageAdapter. In my TabsViewPagerFragmentActivity class, I get the error that:
fm cannot be resolved to a variable TabsViewPagerFragmentActivity.java /LoginAndRegistration/src/com/example/loginandregistration line 47 Java Problem
When I follow the quick fix options I chose to create a local variable and then it tells me to initialize fm (fm stands for FragmentManager by the way) but then it sets it to null
I define fm in my PageAdapter here:
public class MyPageAdapter extends FragmentPagerAdapter {
// Declare the number of ViewPager pages
final int PAGE_COUNT = 3;
public MyPageAdapter(FragmentManager fm) {
super(fm);
}
So my question is:
Should I follow the quick fix? If so, what should I change the null value to? OR Should I change something in my PageAdapter class? Here is the TabsViewPagerFragmentActivity.java as well:
package com.example.loginandregistration;
import android.app.ActionBar;
import android.app.ActionBar.Tab;
import android.app.FragmentManager;
import android.app.FragmentTransaction;
import android.os.Bundle;
import android.support.v4.app.FragmentActivity;
import android.support.v4.view.ViewPager;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentPagerAdapter;
import android.support.v4.content.LocalBroadcastManager;
import com.example.loginandregistration.MyPageAdapter;
public class TabsViewPagerFragmentActivity extends FragmentActivity {
// Declare Variables
ActionBar mActionBar;
ViewPager mPager;
Tab tab;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// Get the view from dashboard.xml
setContentView(R.layout.dashboard);
// Activate Navigation Mode Tabs
mActionBar = getActionBar();
mActionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
// Locate ViewPager in activity_main.xml
mPager = (ViewPager) findViewById(R.id.pager);
// Capture ViewPager page swipes
ViewPager.SimpleOnPageChangeListener ViewPagerListener = new ViewPager.SimpleOnPageChangeListener() {
#Override
public void onPageSelected(int position) {
super.onPageSelected(position);
// Find the ViewPager Position
mActionBar.setSelectedNavigationItem(position);
}
};
mPager.setOnPageChangeListener(ViewPagerListener);
// Locate the adapter class called ViewPagerAdapter.java
MyPageAdapter viewpageradapter = new MyPageAdapter(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().setText("Tab1").setTabListener(tabListener);
mActionBar.addTab(tab);
// Create second Tab
tab = mActionBar.newTab().setText("Tab2").setTabListener(tabListener);
mActionBar.addTab(tab);
// Create third Tab
tab = mActionBar.newTab().setText("Tab3").setTabListener(tabListener);
mActionBar.addTab(tab);
}
}

Provide the fragment manager from the Activity to the adapter constructor:
If you use the support library:
MyPageAdapter viewpageradapter = new MyPageAdapter(getSupportFragmentManager());