Android нинг яратилиши тарихи

Menyu yaratish

Ilovalardagi menyular android.view.Menu klassi bilan ifodalanadi va har bir faoliyat ushbu turdagi ob'ekt bilan bog'lanadi. android.view.Menu obyekti o'zgaruvchan sonli elementlarni o'z ichiga olishi mumkin, ular o'z navbatida pastki elementlarni saqlashi mumkin.

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xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" android:layout_width="match_parent" android:layout_height="match_parent" > android:id="@+id/selectedMenuItem" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="Hello World!" android:textSize="28sp" app:layout_constraintLeft_toLeftOf="parent" app:layout_constraintTop_toTopOf="parent" />

package com.example.menuapp;

import androidx.appcompat.app.AppCompatActivity;

import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.TextView;

public class MainActivity extends AppCompatActivity {

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

@Override

public boolean onCreateOptionsMenu(Menu menu) {

getMenuInflater().inflate(R.menu.main_menu, menu);

return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
int id = item.getItemId();
TextView headerView = findViewById(R.id.selectedMenuItem);
switch(id){
case R.id.action_settings :
headerView.setText("Настройки");
return true;
case R.id.open_settings:
headerView.setText("Открыть");
return true;
case R.id.save_settings:
headerView.setText("Сохранить");
return true;
}
//headerView.setText(item.getTitle());
return super.onOptionsItemSelected(item);
}
}