I have an Activity that lays out ListFragments side by side (as many as a user wants) in a HorizontalScrollView upon choosing an option in the ActionBar.
Each ListFragment item contains TextViews and a Button. A SimpleAdapter populates data for each item in every ListFragment.
The issue I am facing now is that the buttons in each list item do not respond to clicks. The layout can be summarized as follows: Button inside a ListFragment inside a FragmentActivity, going from the innermost child element to the parent at the root view.
I have spent many hours on this problem and I am unable to arrive at a solution to make the buttons respond to clicks. Some of the approaches I have used include obtaining the button's view and attaching onClickListeners, 2) implementing the OnClickListener interface for the ListFragment. I am also aware of the onInterceptTouchEvent method for a ViewGroup class, however my lack of experience with Android prevents me from arriving at a solution. Any guidance or direction towards solving this problem would be most appreciated.
Here is the code for the ListFragment:
package com.example.androidlistfragmenttest;
import java.util.ArrayList;
import java.util.HashMap;
import android.os.Bundle;
import android.support.v4.app.ListFragment;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.SimpleAdapter;
public class MyFragment extends ListFragment {
private ArrayList<HashMap<String,String>> arraylist;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
View view = inflater.inflate(R.layout.fragment_layout, container, false);
Button button = (Button) view.findViewById(R.id.button);
button.setOnClickListener(new OnClickListener(){
//THIS DOES NOT PRINT IN LOGCAT. BUTTON DOES NOT RESPOND TO CLICKS.
@Override
public void onClick(View arg0) {
Log.v("GODZILLA","ATOMIC BREATH");
}
});
return view;
}
@Override
public void onActivityCreated(Bundle savedInstanceState){
super.onActivityCreated(savedInstanceState);
arraylist = dataGenerator();
SimpleAdapter adapter = new SimpleAdapter(getActivity().getApplicationContext(), arraylist, R.layout.fragment_layout,new String[]{"KEY"},new int[]{R.id.text_id});
setListAdapter(adapter);
}
/*
* Method to populate an adapter's data list.
*/
public ArrayList<HashMap<String,String>> dataGenerator(){
HashMap<String,String> hashMap1 = new HashMap<String,String>();
hashMap1.put("KEY", "A");
HashMap<String,String> hashMap2 = new HashMap<String,String>();
hashMap2.put("KEY", "B");
HashMap<String,String> hashMap3 = new HashMap<String,String>();
hashMap3.put("KEY", "C");
HashMap<String,String> hashMap4 = new HashMap<String,String>();
hashMap4.put("KEY", "D");
HashMap<String,String> hashMap5 = new HashMap<String,String>();
hashMap5.put("KEY", "E");
ArrayList<HashMap<String,String>> arraylist = new ArrayList<HashMap<String,String>>();
arraylist.add(hashMap1);
arraylist.add(hashMap2);
arraylist.add(hashMap3);
arraylist.add(hashMap4);
arraylist.add(hashMap5);
return arraylist;
}
} //End of MyFragment
And this is the code for the Activity containing the Fragment(s):
package com.example.androidlistfragmenttest;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Stack;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentActivity;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentTransaction;
import android.support.v4.app.NavUtils;
import android.view.Menu;
import android.view.MenuItem;
public class MainActivity extends FragmentActivity {
private Stack<String> tagStack;
private Integer last_tag_number;
public MainActivity(){
last_tag_number = new Integer("0");
tagStack = new Stack<String>();
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
@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 boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case R.id.add_fragment:
addColumn();
return true;
case R.id.remove_column:
removeColumn();
return true;
case android.R.id.home:
// This ID represents the Home or Up button. In the case of this
// activity, the Up button is shown. Use NavUtils to allow users
// to navigate up one level in the application structure. For
// more details, see the Navigation pattern on Android Design:
//
// http://developer.android.com/design/patterns/navigation.html#up-vs-back
//
NavUtils.navigateUpFromSameTask(this);
return true;
}
return super.onOptionsItemSelected(item);
}
/*
* This method adds a fragment to the screen
*/
public void addColumn(){
FragmentManager fragmentManager = getSupportFragmentManager();
FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
MyFragment fragment = new MyFragment();
fragmentTransaction.add(R.id.fragment_activity, fragment,tagGenerator());
fragmentTransaction.commit();
}
/*
* This method removes a fragment from the screen
*/
public void removeColumn(){
if(tagStack.size() != 0){
FragmentManager fragmentManager = getSupportFragmentManager();
Fragment fragment = fragmentManager.findFragmentByTag(tagStack.pop());
FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
fragmentTransaction.remove(fragment);
fragmentTransaction.commit();
}
}
/*
* This function generates tags for each fragment that is displayed on the screen
* The tags pose as unique identifiers for each fragment
*/
public String tagGenerator(){
Integer tag_number;
if(last_tag_number.intValue() == 0){
tag_number = last_tag_number;
int temp = last_tag_number.intValue();
temp+=1;
last_tag_number = Integer.valueOf(temp);
}
else{
tag_number = new Integer(last_tag_number.intValue());
int temp = last_tag_number.intValue();
temp+=1;
last_tag_number = Integer.valueOf(temp);
}
String tag = tag_number.toString();
tagStack.push(tag);
return tag;
}
} //End of MainActivity
As well as the layouts for the FragmentActivity:
<?xml version="1.0" encoding="utf-8"?>
<HorizontalScrollView
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
>
<LinearLayout
android:id="@+id/fragment_activity"
android:layout_width="fill_parent"
android:layout_height = "fill_parent"
android:orientation = "horizontal"
android:gravity="center"
>
</LinearLayout>
</HorizontalScrollView>
And the ListFragment:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="300dp"
android:layout_height="match_parent"
android:orientation="vertical"
android:layout_weight="1"
android:layout_margin="5dp"
android:descendantFocusability="blocksDescendants" >
<ListView android:id="@id/android:list"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
/>
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="horizontal"
android:layout_gravity="center" >
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/label"
android:layout_gravity="start"
/>
<TextView
android:id="@+id/text_id"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:layout_gravity="end"
/>
</LinearLayout>
<LinearLayout
android:layout_height="match_parent"
android:layout_width="match_parent"
android:orientation="horizontal" >
<Button
android:id="@+id/button"
android:layout_height="wrap_content"
android:layout_width="wrap_content"
android:text="@string/button"
android:layout_margin="2dp"
android:layout_marginLeft="2dp"
android:layout_marginRight="2dp"
/>
</LinearLayout>
</LinearLayout>
