Sunday, October 18, 2015

Android Fragmnet Example code with full stack maintain | Fragment demo application | Simple Fragment example with action bar back button stack handle

Hello Friend,

Today I am going to share code for how to create android fragment and how to handle back stack. Have a look at below code or you can download full code from GIT server.



1)LoginActivity.java-

package com.androidhub4you.fragmentdemo;
import android.content.Intent;
import android.os.Bundle;
import android.support.v7.app.ActionBarActivity;
import android.view.View;
public class LoginActivity extends ActionBarActivity {
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_login);
        findViewById(R.id.button__activity_main).setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Intent mIntent=new Intent(LoginActivity.this,MainActivity.class);
                startActivity(mIntent);
            }
        });
    }
}


2)activity_login.xml

<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"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context=".MainActivity">
    <TextView
        android:layout_width="wrap_content"
        android:text="Login Activity"
        android:textSize="26sp"
        android:textStyle="bold"
        android:layout_marginTop="20dp"
        android:layout_centerHorizontal="true"
        android:layout_height="wrap_content" />
    <TextView
        android:layout_above="@+id/button__activity_main"
        android:layout_width="match_parent"
        android:text="(From Login Activity we will open Main Activity and inside Main Activity we will add Main Fragment in container)"
        android:textSize="18sp"
        android:textStyle="bold"
        android:gravity="center"
        android:layout_marginBottom="50dp"
        android:layout_centerHorizontal="true"
        android:layout_height="wrap_content" />
    <Button
        android:id="@+id/button__activity_main"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:paddingBottom="15dp"
        android:text="Open Main Activity"
        android:textSize="20sp"
        android:layout_centerInParent="true"
        android:paddingTop="15dp" />
</RelativeLayout>

  
 3)MainActivity.java-
package com.androidhub4you.fragmentdemo; import android.app.FragmentTransaction; import android.os.Bundle; import android.support.v7.app.ActionBar; import android.support.v7.app.ActionBarActivity; import android.util.Log; import android.view.KeyEvent; import android.view.Menu; import android.view.MenuItem; /** * Manish Srivastava */ public class MainActivity extends ActionBarActivity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); Log.v("<<main activity>>", "<<screen>>"); //display home back button ActionBar actionBar = getSupportActionBar(); actionBar.setDisplayShowHomeEnabled(true); actionBar.setDisplayHomeAsUpEnabled(true); //In side Create method of MainActivity we will add main fragment FragmentTransaction transaction = getFragmentManager().beginTransaction(); FragmentMain fragmentMain = new FragmentMain(); transaction.addToBackStack("fragmentMain"); transaction.replace(R.id.container, fragmentMain); transaction.commit(); } @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; } @Override public boolean onOptionsItemSelected(MenuItem item) { switch (item.getItemId()) { case android.R.id.home: handleBackStack(); break; case R.id.action_settings: //do nothing break; } return super.onOptionsItemSelected(item); } //handle back stack from hardware back button and top action bar home back button public boolean handleBackStack() { //on back press check the count of fragment in stack int count = getFragmentManager().getBackStackEntryCount(); Log.v("<<Fragment in stack>>",String.valueOf(count)); if (count == 1) { //if count is 0 then finish main activity finish(); }else { //else remove one fragment from the stack FragmentTransaction transaction = getFragmentManager().beginTransaction(); getFragmentManager().popBackStackImmediate(); transaction.commit(); } return true; } //set action bar title name public void setActionBarTitle(String title) { getSupportActionBar().setTitle(title); } //handle the hardware back press @Override public boolean onKeyDown(int keyCode, KeyEvent event) { if(keyCode==KeyEvent.KEYCODE_BACK){ handleBackStack(); return true; } return super.onKeyDown(keyCode, event); } }
4)activity_main.xml-
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <FrameLayout
        android:id="@+id/container"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />

</RelativeLayout>

5)FragmentMain.java-
package com.androidhub4you.fragmentdemo;

import android.app.FragmentTransaction;
import android.os.Bundle;
import android.app.Fragment;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;

/**
 * Manish Srivastava
 */
public class FragmentMain extends Fragment {


    public FragmentMain() {
        // Required empty public constructor
    }

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

        // Inflate the layout for this fragment
        View view = inflater.inflate(R.layout.fragment_main, container, false);
        final Button mButtonFragmentMain=(Button)view.findViewById(R.id.button__fragment_main);

        Log.v("<< main fragment>>","<<screen>>");

        mButtonFragmentMain.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                //call the child fragment
                FragmentTransaction transaction = getFragmentManager().beginTransaction();
                FragmentChild fragmentChild = new FragmentChild();
                transaction.addToBackStack("fragmentChild");
                transaction.replace(R.id.container, fragmentChild);
                transaction.commit();

            }
        });

        //call the main activity set tile method
        ((MainActivity)getActivity()).setActionBarTitle("Home Fragment");

        return view;
    }
}
6)fragment_main.xml-
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin">

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerHorizontal="true"
        android:layout_marginTop="20dp"
        android:text="Main Fragment Screen"
        android:textSize="26sp"
        android:textStyle="bold" />

    <Button
        android:id="@+id/button__fragment_main"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_centerInParent="true"
        android:paddingBottom="15dp"
        android:paddingTop="15dp"
        android:text="Open Child Fragment"
        android:textSize="20sp" />
</RelativeLayout>
7)FragmentChild.java-
package com.androidhub4you.fragmentdemo;

import android.app.Fragment;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;

/**
 * Manish Srivastava
 */
public class FragmentChild extends Fragment {


    public FragmentChild() {
        // Required empty public constructor
    }


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

        // Inflate the layout for this fragment
        View view = inflater.inflate(R.layout.fragment_child, container, false);

        //call the main activity set tile method
        ((MainActivity)getActivity()).setActionBarTitle("Child Fragment");


        return view;
    }
}

8)fragment_child.xml-
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin">

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerInParent="true"
        android:text="Child Fragment Screen"
        android:textSize="26sp"
        android:textStyle="bold" />
</RelativeLayout>

DOWNLOAD FULL CODE 
 
Thanks!
Manish

4 comments :

  1. hi ..
    can u help me to uploading dynamic picture from their gallery on parse database in each new registration..
    Android+Parse

    ReplyDelete

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