Laboratoriya ishi №6

Laboratoriyaning amaliy qismi
Agar standart holatda biz XML faylni setContentView(R.layout.activity_main) usuliga qo‘shsak, uni dasturiy jihatdan yaratishda bizga bu usul kerak bo‘lmaydi. Uni o‘chiring va kodni yozing:

paket en.alexanderkimov.test;

android.app.Activity import;
android.content.Context import;
android.content.Intent import;
android.os.Bundle import;
android.view.View import;
android.view.View.OnClickListenerni import qilish;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.LinearLayout.LayoutParams;
android.widget.TextView import;
import android.widget.Toast;

umumiy sinf TestActivity faollikni kengaytiradi {

/** Faoliyat birinchi marta yaratilganda chaqiriladi. */
@Override
public void onCreate (to‘plam savedInstanceState) {
super.onCreate(savedInstanceState);

// bizga bu usul kerak emas

// setContentView(R.layout.activity_test);

LinearLayout layout = yangi LinearLayout(TestActivity.this);

layout.setId(R.id.layout_id);
LayoutParams layoutParams = yangi LayoutParams(LayoutParams.MATCH_PARENT,
LayoutParams.MATCH_PARENT);
layout.setLayoutParams(layoutParams);
layout.setOrientation(LinearLayout.VERTICAL);

ImageView imageView = new ImageView(TestActivity.this);

imageView.setId(R.id.image_id);
imageView.setImageResource(R.drawable.ic_launcher);
LayoutParams imageViewLayoutParams = yangi LayoutParams(
LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
imageView.setLayoutParams(imageViewLayoutParams);

layout.addView (imageView);

setContentView (tartib);

layout.setOnClickListener(onViewClickListener);

imageView.setOnClickListener(onViewClickListener);

}

onClickListener onViewClickListener = yangi OnClickListener() {

@Override
public void onClick(View v) {

int myId = v.getId();

Toast.makeText(TestActivity.this,
"ID: " + String.valueOf(myId) + " bosildi",
Toast.LENGTH_LONG).show();
}
};
}
Shakllanish printsipi quyidagicha - biz LinearLayout ob'ektini (yoki boshqa konteyner) yaratamiz va kerakli xususiyatlarni o‘rnatamiz. Keyinchalik, biz kerakli bolalar elementlarini yaratamiz va ularning xususiyatlarini o‘rnatamiz. AddView() usuli orqali bola elementni asosiy elementga ulashni unutmang.