Android ऐप में टैब लेआउट कैसे बनाएं?

परिचय

यह उदाहरण दर्शाता है कि Android ऐप में TabLayout और ViewPager का उपयोग करके टैब इंटरफेस कैसे बनाया जाए।

चरण 1: नया प्रोजेक्ट बनाएं

Android Studio में नया प्रोजेक्ट बनाएं।

चरण 2: डिजाइन लाइब्रेरी निर्भरता जोड़ें

implementation 'com.android.support:design:28.0.0'

चरण 3: लेआउट XML में TabLayout और ViewPager

res/layout/activity_main.xml:

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
    xmlns:android="https://schemas.android.com/apk/res/android"
    xmlns:tools="https://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">

    <android.support.design.widget.TabLayout
        android:id="@+id/tabLayout"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:background="#1db995">
    </android.support.design.widget.TabLayout>

    <android.support.v4.view.ViewPager
        android:id="@+id/viewPager"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@id/tabLayout"
        android:layout_centerInParent="true"
        android:layout_marginTop="100dp"
        tools:layout_editor_absoluteX="8dp" />

</RelativeLayout>

चरण 4: MainActivity.java में टैब सेटअप

src/MainActivity.java:

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.support.design.widget.TabLayout;
import android.support.v4.view.ViewPager;

public class MainActivity extends AppCompatActivity {
    TabLayout tabLayout;
    ViewPager viewPager;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        tabLayout = findViewById(R.id.tabLayout);
        viewPager = findViewById(R.id.viewPager);

        tabLayout.addTab(tabLayout.newTab().setText("फुटबॉल"));
        tabLayout.addTab(tabLayout.newTab().setText("क्रिकेट"));
        tabLayout.addTab(tabLayout.newTab().setText("NBA"));

        tabLayout.setTabGravity(TabLayout.GRAVITY_FILL);

        final MyAdapter adapter = new MyAdapter(this, getSupportFragmentManager(),
                tabLayout.getTabCount());

        viewPager.setAdapter(adapter);
        viewPager.addOnPageChangeListener(new TabLayout.TabLayoutOnPageChangeListener(tabLayout));

        tabLayout.addOnTabSelectedListener(new TabLayout.OnTabSelectedListener() {
            @Override
            public void onTabSelected(TabLayout.Tab tab) {
                viewPager.setCurrentItem(tab.getPosition());
            }

            @Override
            public void onTabUnselected(TabLayout.Tab tab) { }

            @Override
            public void onTabReselected(TabLayout.Tab tab) { }
        });
    }
}

चरण 5: MyAdapter.java बनाएं

import android.content.Context;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentPagerAdapter;
import android.support.v4.app.FragmentManager;

class MyAdapter extends FragmentPagerAdapter {
    Context context;
    int totalTabs;

    public MyAdapter(Context c, FragmentManager fm, int totalTabs) {
        super(fm);
        context = c;
        this.totalTabs = totalTabs;
    }

    @Override
    public Fragment getItem(int position) {
        switch (position) {
            case 0:
                return new Football();
            case 1:
                return new Cricket();
            case 2:
                return new NBA();
            default:
                return null;
        }
    }

    @Override
    public int getCount() {
        return totalTabs;
    }
}

चरण 6: फ्रैगमेंट और लेआउट बनाएं

प्रोजेक्ट पर राइट-क्लिक करें → New → Fragment → Blank

a) Football.java

import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;

public class Football extends Fragment {
    public Football() { }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        return inflater.inflate(R.layout.fragment_football, container, false);
    }
}

fragment_football.xml

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="https://schemas.android.com/apk/res/android"
    xmlns:tools="https://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".Football">

    <TextView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:textAlignment="center"
        android:text="फुटबॉल फ्रैगमेंट"
        android:textSize="16sp"
        android:textStyle="bold"/>

</FrameLayout>

b) Cricket.java

public class Cricket extends Fragment {
    public Cricket() { }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        return inflater.inflate(R.layout.fragment_cricket, container, false);
    }
}

fragment_cricket.xml

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="https://schemas.android.com/apk/res/android"
    xmlns:tools="https://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".Cricket">

    <TextView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:textAlignment="center"
        android:text="क्रिकेट फ्रैगमेंट"
        android:textSize="16sp"
        android:textStyle="bold"/>

</FrameLayout>

c) NBA.java

public class NBA extends Fragment {
    public NBA() { }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        return inflater.inflate(R.layout.fragment_nba, container, false);
    }
}

fragment_nba.xml

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="https://schemas.android.com/apk/res/android"
    xmlns:tools="https://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".NBA">

    <TextView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:textAlignment="center"
        android:text="NBA फ्रैगमेंट"
        android:textSize="16sp"
        android:textStyle="bold"/>

</FrameLayout>

चरण 7: AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="https://schemas.android.com/apk/res/android"
    package="app.com.sample">

    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:roundIcon="@mipmap/ic_launcher_round"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">

        <activity android:name=".MainActivity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>

    </application>
</manifest>

ऐप चलाएं

ऐप चलाने पर तीन टैब (फुटबॉल, क्रिकेट, NBA) दिखाई देंगे, जिनके बीच स्वाइप करके नेविगेट किया जा सकता है।