Android Fragment exchange (or) "
Fragment Transaction" to handle sections. Android Fragment are valuable when we need to bolster different screen measure. To oversee parts we require a FragmentManager that help us to handle Android piece trasaction between sections. With Android part exchange we mean a succession of ventures to include, supplant or evacuate pieces. In the last post we demonstrated to bolster numerous screen size and introduction utilizing sections.
code for FragmentTransactin shown below.
activity_main.xml :-
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
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:orientation="vertical"
tools:context="com.fragmenttransaction.MainActivity">
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="fragA"
android:id="@+id/button"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true" />
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="fragB"
android:id="@+id/button2"
android:layout_below="@+id/button"
android:layout_centerHorizontal="true" />
<FrameLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_centerHorizontal="true"
android:id="@+id/myframe"
android:background="#decaca">
</FrameLayout>
</LinearLayout>
fraga.xml :-
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#811313">
<TextView
android:layout_width="209dp"
android:layout_height="54dp"
android:textAppearance="?android:attr/textAppearanceLarge"
android:text="this fragment A"
android:id="@+id/textView"
android:layout_gravity="center_horizontal" />
</LinearLayout>
fragb.xml :-
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#be6f6f">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceLarge"
android:text="fragment B"
android:id="@+id/textView2"
android:layout_gravity="center_horizontal" />
</LinearLayout>
MainActivity.java :-
package com.fragmenttransaction;
import android.app.FragmentManager;
import android.app.FragmentTransaction;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.Button;
public class MainActivity extends AppCompatActivity implements
View.OnClickListener {
Button b1,b2;
FragmentManager fragmentManager;
FragmentTransaction fragmentTransaction,fragmentTransaction1;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
fragmentManager=getFragmentManager();
b1=(Button)findViewById(R.id.button);
b2=(Button)findViewById(R.id.button2);
b1.setOnClickListener(this);
b2.setOnClickListener(this);
}
@Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.button:
fragmentTransaction=fragmentManager.beginTransaction();
fragA fragA=new fragA();
fragmentTransaction.add(R.id.myframe,fragA);
fragmentTransaction.commit();
break;
case R.id.button2:
fragmentTransaction1=fragmentManager.beginTransaction();
frabB frabB=new frabB();
fragmentTransaction1.add(R.id.myframe,frabB);
fragmentTransaction1.commit();
break;
}
}
}
FragA.java :-
package com.fragmenttransaction;
import android.app.Fragment;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
/** * Created by Dell on 7/11/2016. */
public class fragA extends Fragment {
@Nullable
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
return inflater.inflate(R.layout.fraga,container,false);
}
}
FragB.java :-
package com.fragmenttransaction;
import android.app.Fragment;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
/** * Created by Dell on 7/11/2016. */
public class frabB extends Fragment {
@Nullable
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
return inflater.inflate(R.layout.fragb,container,false);
}
}
Output :-
 |
| AndroidFragmentTransaction fig:1 |
 |
| AndroidFragmentTransaction fig:2 |
 |
| AndroidFragmentTransaction fig:3 |
