Android - Fragment Kullanımı

Fragment olarak isimlendirilen yapılar, Android mobil uygulamalarda Activity’ler içerisine yerleştirilen ve kullanıcı deneyimi ile cihaz performansını artıran yapılan olarak karşımıza çıkmıştır.

Spinner içerisinde kullanmak üzere sabit bir dizi tanımlayabiliriz. strings.xml içerisine aşağıdaki kodlar eklenebilir:

<array name="liste">
    <item>Birinci</item>
    <item>İkinci</item>
    <item>Üçüncü</item>
</array>

<item>Birinci</item>

<item>İkinci</item>

<item>Üçüncü</item>

</array>

activity_main.xml ismindeki layout dosyasının içeriği şu şekildedir:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    android:layout_gravity="center"
    tools:context=".MainActivity">


        <Spinner
            style="@style/Widget.AppCompat.DropDownItem.Spinner"
            android:id="@+id/spinner"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:background="#CCCCCC"
            android:popupBackground="#F89450"
            />

        <TextView
            android:id="@+id/textView"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="TextView" />

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

        </FrameLayout>
</LinearLayout>

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

xmlns:app="http://schemas.android.com/apk/res-auto"

xmlns:tools="http://schemas.android.com/tools"

android:layout_width="match_parent"

android:layout_height="match_parent"

android:orientation="vertical"

android:layout_gravity="center"

tools:context=".MainActivity">

<Spinner

style="@style/Widget.AppCompat.DropDownItem.Spinner"

android:id="@+id/spinner"

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:background="#CCCCCC"

android:popupBackground="#F89450"

<TextView

android:id="@+id/textView"

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:text="TextView" />

<FrameLayout

android:id="@+id/frameLayot"

android:layout_width="match_parent"

android:layout_height="match_parent">

</FrameLayout>

</LinearLayout>

MainActivity.java dosyasının içeriği şu şekilde olacaktır:

package com.teknikakil.fragment;

import androidx.appcompat.app.AppCompatActivity;
import androidx.fragment.app.Fragment;

import android.os.Bundle;
import android.text.style.IconMarginSpan;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.Spinner;
import android.widget.TextView;

import java.util.List;

public class MainActivity extends AppCompatActivity {

    Spinner spinner;
    TextView textView;

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

        spinner = findViewById(R.id.spinner);
        textView = findViewById(R.id.textView);

        ArrayAdapter adapter = ArrayAdapter.createFromResource(this,R.array.liste,R.layout.support_simple_spinner_dropdown_item);
        adapter.setDropDownViewResource(R.layout.support_simple_spinner_dropdown_item);
        spinner.setAdapter(adapter);

        spinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
            @Override
            public void onItemSelected(AdapterView<?> adapterView, View view, int i, long l) {
                String[] listeDizisi = getResources().getStringArray(R.array.liste);
                textView.setText(listeDizisi[i] + " seçildi.");

                switch(listeDizisi[i])
                {
                    case "Birinci":
                        getSupportFragmentManager().beginTransaction().replace(R.id.frameLayot, new BirinciFragment()).commit();
                        break;
                    case "İkinci":
                        getSupportFragmentManager().beginTransaction().replace(R.id.frameLayot, new IkinciFragment()).commit();
                        break;
                    case "Üçüncü":
                        //Son gösterilen Fragment'ı sil
                        List<Fragment> fragmentList = getSupportFragmentManager().getFragments();
                        for (Fragment aktifFragment :
                             fragmentList) {
                            if (aktifFragment!=null && aktifFragment.isVisible())
                            {
                                getSupportFragmentManager().beginTransaction().remove(aktifFragment).commit();
                            }
                        }
                        break;
                }
            }

            @Override
            public void onNothingSelected(AdapterView<?> adapterView) {
            }
        });
    }
}

package com.teknikakil.fragment;

import androidx.appcompat.app.AppCompatActivity;

import androidx.fragment.app.Fragment;

import android.os.Bundle;

import android.text.style.IconMarginSpan;

import android.view.View;

import android.widget.AdapterView;

import android.widget.ArrayAdapter;

import android.widget.Spinner;

import android.widget.TextView;

import java.util.List;

public class MainActivity extends AppCompatActivity {

Spinner spinner;

TextView textView;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

spinner = findViewById(R.id.spinner);

textView = findViewById(R.id.textView);

ArrayAdapter adapter = ArrayAdapter.createFromResource(this,R.array.liste,R.layout.support_simple_spinner_dropdown_item);

adapter.setDropDownViewResource(R.layout.support_simple_spinner_dropdown_item);

spinner.setAdapter(adapter);

spinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {

@Override

public void onItemSelected(AdapterView<?> adapterView, View view, int i, long l) {

String[] listeDizisi = getResources().getStringArray(R.array.liste);

textView.setText(listeDizisi[i] + " seçildi.");

switch(listeDizisi[i])

{

case "Birinci":

getSupportFragmentManager().beginTransaction().replace(R.id.frameLayot, new BirinciFragment()).commit();

break;

case "İkinci":

getSupportFragmentManager().beginTransaction().replace(R.id.frameLayot, new IkinciFragment()).commit();

break;

case "Üçüncü":

//Son gösterilen Fragment'ı sil

List<Fragment> fragmentList = getSupportFragmentManager().getFragments();

for (Fragment aktifFragment :

fragmentList) {

if (aktifFragment!=null && aktifFragment.isVisible())

{

getSupportFragmentManager().beginTransaction().remove(aktifFragment).commit();

}

break;

}

@Override

public void onNothingSelected(AdapterView<?> adapterView) {

}

});

}

Android – Fragment Kullanımı

Hürkal HÜSEM

Bir cevap yazın Cevabı iptal et

Alakalı Yazılar

Android – SQLite Veritabanı Uygulaması

Android – Açılış Ekranı (Splash Screen) ve Animasyonlar

Android’de Layout Türleri

Hürkal HÜSEM

Bir cevap yazın Cevabı iptal et