Android Studio muhitida menyular va dialog oynalar bilan ishlash

Menyu elementlarini bosish bilan ishlash.

Agar menyu elementlaridan birini bosgan bo'lsak, unda hech narsa bo'lmaydi. Amallarni menyuga bog'lash uchun MainActivity.java faylida onOptionsItemSelected-ni bekor qilishimiz kerak.

Tanlangan menyu bandini ekranda ko'rsatish uchun activity_main.xml fayliga id = header bilan TextView-ni qo'shamiz:

android:layout_width="match_parent"

android:layout_height="match_parent">

android:id="@+id/header"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:textSize="24sp" />

MainActivity.java faylini o'zgartiramiz:

package com.example.android.menyuilova;

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.header);

switch (id) {

case R.id.sozlamalar:

headerView.setText("Sozlamalar");

return true;

case R.id.ochish:

headerView.setText("Ochish");

return true;

case R.id.saqlash:

headerView.setText("Saqlash");

return true;

}

return super.onOptionsItemSelected(item);

}

}

Qaysi menyu tanlanganligini aniqlash uchun avval uning identifikatorini olamiz: int id = item.getItemId(). Keyin biz switch, case -dan foydalanamiz va kerakli variantni tanlaymiz va tanlovga qarab ma'lum amallarni bajaramiz - bizni kodda TextView matnini o'rnatadi.

Endi yana bir bor ilovani ishga tushirib ishlashini ko'ramiz:

Sozlamalar ni bosamiz