One fragment for several actions

Question

We have always heard the use of several fragments with one action. Is the opposite possible? I'm interested. Can we use the same fragment for several activities. Please give ONE EXAMPLE.

Answer 1

How to reuse one fragment in several actions

A green background with two buttons is one piece that is reused by several actions.

1. Make your class and fragment layout

MyFragment.java

import android.support.v4.app.Fragment;

public class MyFragment extends Fragment implements View.OnClickListener {

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {

        View myLayout = inflater.inflate(R.layout.my_fragment_layout, container, false);

        // add click listeners to the buttons in the fragment
        Button buttonOne = myLayout.findViewById(R.id.button_1);
        Button buttonTwo = myLayout.findViewById(R.id.button_2);
        buttonOne.setOnClickListener(this);
        buttonTwo.setOnClickListener(this);

        return myLayout;
    }

    @Override
    public void onClick(View v) {
        switch (v.getId()) {
            case R.id.button_1:
                Toast.makeText(getContext(), "Button One", Toast.LENGTH_SHORT).show();
                break;
            case R.id.button_2:
                Toast.makeText(getContext(), "Button Two", Toast.LENGTH_SHORT).show();
                break;
        }
    }
}

my_fragment_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:background="@android:color/holo_green_dark"
    android:orientation="vertical">

    <Button
        android:id="@+id/button_1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="Button 1"/>

    <Button
        android:id="@+id/button_2"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="Button 2"/>
</LinearLayout>

2. Add a snippet to your actions

activity_blue.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@android:color/holo_blue_dark"
    android:orientation="vertical">

    <Button
        android:id="@+id/button"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:onClick="goToRedActivityButtonClick"
        android:text="Go to red activity"/>

    <!-- reused fragment -->
    <fragment
        android:id="@+id/my_fragment"
        android:name="com.example.onefragmentmultipleactivities.MyFragment"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"/>

</RelativeLayout>

activity_red.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="#ff3636"
    android:orientation="vertical">

    <Button
        android:id="@+id/button"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:onClick="goToYellowActivityButtonClick"
        android:text="Go to yellow activity"/>

    <!-- reused fragment -->
    <fragment
        android:id="@+id/my_fragment"
        android:name="com.example.onefragmentmultipleactivities.MyFragment"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"/>

</RelativeLayout>

activity_yellow.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="#f9f478"
    android:orientation="vertical">

    <!-- reused fragment -->
    <fragment
        android:id="@+id/my_fragment"
        android:name="com.example.onefragmentmultipleactivities.MyFragment"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"/>

</RelativeLayout>

Notes

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Answer 4

generic_error_msg_fragment.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:background="@color/White" >

    <TextView
        android:id="@+id/error_message_textview"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_centerVertical="true"
        android:gravity="center"
        android:textColor="@android:color/darker_gray"
        android:textSize="@dimen/font_size_16sp" />


        <Button
            android:id="@+id/error_button_handler"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
             android:layout_alignParentBottom="true"
            android:layout_gravity="left|center_vertical"
            android:textSize="@dimen/font_size_16sp"
             />

</RelativeLayout>

GenericErrorFragment.Java

public class GenericErrorFragment extends Fragment{


    @Override
    public void onAttach(Activity activity) {
        super.onAttach(activity);
    }

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
    }




    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
            Bundle savedInstanceState) {


        View genericView = inflater.inflate(R.layout.generic_error_msg_fragment, null);
        TextView errorText = (TextView) genericView.findViewById(R.id.error_message_textview);

        errorText.setText("error msg" );

        Button errorbutton = (Button) genericView.findViewById(R.id.error_button_handler);

        errorbutton.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {
                // your logic launch some other activity

            }
        });
        return genericView;
    }

}