First of all, Thank you for answering. I am a newbie in android app development .I have made a fragment called fragment_list for creating a listview dynamically.The problem is that when the application runs the screen remains blank.I have tried to make a listview that has an image and a TextView. I am yet to implement setOnItemClickListener(). I have used Fragment Transaction in the Main_Activity.java to add the Fragment.Here are the files.
main_layout.xml:
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/groups"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >
</LinearLayout>
Main_Activity.java
package com.cloudplay.spotvideo;
import android.app.Activity;
import android.app.FragmentManager;
import android.app.FragmentTransaction;
import android.os.Bundle;
public class Main_Activity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main_layout);
Fragment_List f1 = new Fragment_List();
FragmentManager manager = getFragmentManager();
FragmentTransaction transaction = manager.beginTransaction();
transaction.add(R.id.groups, f1, "MAIN_LIST");
transaction.addToBackStack("MAIN-LIST");
transaction.commit();
}
}
fragment_list.xml
<?xml version="1.0" encoding="utf-8"?>
<ListView xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="@android:id/list">
</ListView>
Fragment_List.java
package com.cloudplay.spotvideo;
import android.os.Bundle;
import android.app.ListFragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
public class Fragment_List extends ListFragment implements
AdapterView.OnItemClickListener {
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// TODO Auto-generated method stub
return inflater.inflate(R.layout.fragment_list, container, false);
}
@Override
public void onActivityCreated(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onActivityCreated(savedInstanceState);
ArrayAdapter adapter = new ArrayAdapter(getActivity(),
R.layout.single_row, R.array.MainList);
setListAdapter(adapter);
getListView().setOnItemClickListener(this);
}
@Override
public void onItemClick(AdapterView<?> arg0, View arg1, int arg2, long arg3) {
// TODO Auto-generated method stub
}
}
AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.cloudplay.spotvideo"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="14"
android:targetSdkVersion="18" />
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name="com.cloudplay.spotvideo.Main_Activity"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
single_row.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal" >
<ImageView
android:id="@+id/imageView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="@drawable/ic_launcher" />
<TextView
android:id="@+id/textView1"
android:layout_width="match_parent"
android:layout_height="52dp"
android:text="" />
</LinearLayout>
Strings.xml
<?xml version="1.0" encoding="utf-8"?>
<resources>
<string name="app_name">SpotVideo</string>
<string name="action_settings">Settings</string>
<string name="hello_world">Hello world!</string>
<string-array name="MainList">
<item name="movies">Movies</item>
<item name="music">Music</item>
</string-array>
<string-array name="Film">
<item name="hollywood">Hollywood</item>
<item name="bollywood">Bollywood</item>
<item name="tollywood">Tollywood</item>
</string-array>
</resources>
After a little effort I was able to crack the problem and here is the outcome. Adding code which may help others who may fall in similar situation like me.There are many fragments but I have add only the code for MainList fragment which is the first list that appears when you open the app.
Main_Activity.java
package com.abc.def;
import android.app.Activity;
import android.app.Fragment;
import android.app.FragmentManager;
import android.app.FragmentTransaction;
import android.os.Bundle;
import android.view.View;
import android.widget.Toast;
public class Main_Activity extends Activity {
FragmentManager manager;
Fragment f10;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main_layout);
manager = getFragmentManager();
Add_MainList(getCurrentFocus());
}
//Fragment Changer fuctions start
public void Changer(int position) {
switch (position) {
case 0:
f10 = new Movie_List();
Fragment_Change(getCurrentFocus());
break;
case 1:
f10 = new Music_List();
Fragment_Change(getCurrentFocus());
break;
case 2:
f10 = new Documentary_List();
Fragment_Change(getCurrentFocus());
break;
case 3:
f10 = new Cartoons_List();
Fragment_Change(getCurrentFocus());
break;
case 4:
f10 = new DailySoaps_List();
Fragment_Change(getCurrentFocus());
break;
default:
break;
}
}
public void Fragment_Change(View v) {
FragmentTransaction transaction = manager.beginTransaction();
transaction.addToBackStack("MAINLIST");
transaction.replace(R.id.groups, f10, "MUSICLIST");
transaction.commit();
}
public void Add_MainList(View v) {
Main_List f1 = new Main_List();
FragmentTransaction transaction = manager.beginTransaction();
transaction.add(R.id.groups, f1, "MAINLIST");
transaction.commit();
}
//Replacing Main List With Fragment Ended
//Fragment Changer For Movie Starts
public void ChangerMovie(int position) {
switch (position) {
case 0:
// Replace_MainList_with_MovieList(getCurrentFocus());
break;
case 1:
Replace_Movie_List_with_Movie_Grid(getCurrentFocus());
break;
case 2:
// Replace_MainList_with_DocumentaryList(getCurrentFocus());
break;
default:
break;
}
}
//Fragment Changer for Music starts
public void ChangerMusic(int position){
switch(position) {
case 0:
break;
case 1:
break;
case 2:
break;
default:
break;
}
}
public void Replace_Movie_List_with_Movie_Grid(View v) {
Bollywood_Grid f7 = new Bollywood_Grid();
FragmentTransaction transaction = manager.beginTransaction();
transaction.addToBackStack("MOVIELIST");
transaction.replace(R.id.groups, f7, "BOLLYGRID");
transaction.commit();
}
//Fragment Changer for Movie ends
//Error handling; Removing Main list
public void Remove_MainList(View v) {
Main_List f1 = (Main_List) manager.findFragmentByTag("MAINLIST");
FragmentTransaction transaction = manager.beginTransaction();
if (f1 != null) {
transaction.remove(f1);
transaction.commit();
} else {
Toast.makeText(this, "Main List was not added so can't be removed",
Toast.LENGTH_LONG).show();
}
}
}
MainList.java
package com.abc.def;
import android.app.ListFragment;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.ListView;
public class Main_List extends ListFragment {
public Main_List() {
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// TODO Auto-generated method stub
return inflater.inflate(R.layout.mainlist_layout, container, false);
}
@Override
public void onActivityCreated(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onActivityCreated(savedInstanceState);
ArrayAdapter adapter = ArrayAdapter.createFromResource(getActivity(),
R.array.Mainlist, android.R.layout.simple_list_item_1);
setListAdapter(adapter);
}
@Override
public void onListItemClick(ListView l, View v, int position, long id) {
// TODO Auto-generated method stub
super.onListItemClick(l, v, position, id);
Configs.mainlist_position = position;
((Main_Activity)getActivity()).Changer(position);
}
}
mainlist_layout.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<ListView
android:id="@android:id/list"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#87CEFA">
</ListView>
<TextView
android:id="@android:id/empty"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="New Text"
android:layout_gravity="center|center_vertical"/>
</LinearLayout>