Java) 안드로이드 기본세팅

스플래쉬 화면과 메인 화면

 

MainActivity.java

package com.example.myapplication;

import android.content.Intent;
import android.os.Bundle;
import android.os.Handler;
import android.os.Looper;
import android.os.Message;
import android.util.Log;

import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;

public class MainActivity extends AppCompatActivity {

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

        doInitialTask();
    }

    private void doInitialTask()
    {
        Handler handler = new Handler(Looper.getMainLooper()){
            @Override
            public void handleMessage(@NonNull Message msg) {
                Log.d("=====================", String.valueOf(msg.what));

                Intent i = new Intent(MainActivity.this, MainActivity2.class);
                startActivity(i);
                finish();
            }
        };

        handler.sendEmptyMessageDelayed(7, 3*1000);
    }
}

 

acticity_main.xml

<?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"
    tools:context=".MainActivity">
    <ImageView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:src="@drawable/splash"/>

</LinearLayout>

 

MainActivity2.java

package com.example.myapplication;

import android.os.Bundle;

import androidx.appcompat.app.AppCompatActivity;

public class MainActivity2 extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main2);
    }
}

 

activity_main2.xml

<?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:gravity="center"
    tools:context=".MainActivity2">

    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="main screen" />

</LinearLayout>

 

Launch in a tool window 체크체크