[안드로이드 스튜디오 독학#3] Intent, ImageView, Toast

유튜브 채널 hongdroid홍드로이드님의 강의를 보고 학습했습니다.

hongdroid홍드로이드

메인액티비티.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=".MainActivity">
 
    <EditText
        android:id="@+id/et_text"
        android:layout_width="200dp"
        android:layout_height="wrap_content"
 
        />
 
    <Button
        android:id="@+id/btn_move"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="이동"
        />
 
 
    <ImageView
        android:id="@+id/test"
        android:layout_width="100dp"
        android:layout_height="100dp"
        android:src="@mipmap/ic_launcher"/>
 
 
</LinearLayout>

package com.example.intentexample;
 
import androidx.appcompat.app.AppCompatActivity;
 
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.Toast;
 
public class MainActivity extends AppCompatActivity {
    
    private Button btn_move;
    private EditText et_text;
    private String str;
    private ImageView test;
 
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
 
        et_text = findViewById(R.id.et_text);
 
        
        btn_move = findViewById(R.id.btn_move);
        btn_move.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                str = et_text.getText().toString();
                Intent intent = new Intent(MainActivity.this, SubActivity.class);
                intent.putExtra("str",str);
                startActivity(intent); //액티비티 이동
            }
        });
        test = (ImageView)findViewById(R.id.test);
        test.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Toast.makeText(getApplicationContext(),"seminzzang",Toast.LENGTH_SHORT).show();
            }
        });
    }
}

서브액티비티.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"
    tools:context=".SubActivity">
 
    <TextView
        android:id="@+id/tv_sub"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textSize="30sp"
        android:text="서브 액티비티 도착"
        />
 
</LinearLayout>

서브액티비티.java

package com.example.intentexample;
 
import androidx.appcompat.app.AppCompatActivity;
 
import android.content.Intent;
import android.os.Bundle;
import android.widget.TextView;
 
public class SubActivity extends AppCompatActivity {
 
    private TextView tv_sub;
 
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_sub);
 
        tv_sub = findViewById(R.id.tv_sub);
 
        Intent intent = getIntent();
        String str = intent.getStringExtra("str");
 
        tv_sub.setText(str);
    }
}