do it 안드로이드 도전 과제 도전 03 ~ 04

도전 03

 두 개의 이미지뷰에 이미지 번갈아 보여주기

 

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" >

    <ScrollView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_weight="1">

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:orientation="vertical">

            <HorizontalScrollView
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:layout_weight="1">

                <LinearLayout
                    android:layout_width="wrap_content"
                    android:layout_height="match_parent"
                    android:orientation="vertical" >

                    <ImageView
                        android:id="@+id/imageView"
                        android:layout_width="match_parent"
                        android:layout_height="wrap_content"
                        app:srcCompat="@drawable/image01" />
                </LinearLayout>
            </HorizontalScrollView>

        </LinearLayout>
    </ScrollView>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal">

        <Button
            android:id="@+id/btnup"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:onClick="btnclick"
            android:text="위" />

        <Button
            android:id="@+id/btndown"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:onClick="btnclick"
            android:text="아래" />
    </LinearLayout>

    <ScrollView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_weight="1">

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:orientation="vertical">

            <HorizontalScrollView
                android:layout_width="match_parent"
                android:layout_height="match_parent">

                <LinearLayout
                    android:layout_width="wrap_content"
                    android:layout_height="match_parent"
                    android:orientation="vertical" >

                    <ImageView
                        android:id="@+id/imageView2"
                        android:layout_width="match_parent"
                        android:layout_height="wrap_content" />
                </LinearLayout>
            </HorizontalScrollView>

        </LinearLayout>
    </ScrollView>

</LinearLayout>

 

JAVA

package com.example.tistory;

import androidx.appcompat.app.AppCompatActivity;

import android.os.Bundle;
import android.view.View;
import android.widget.ImageView;

public class MainActivity extends AppCompatActivity {
    ImageView imageView;
    ImageView imageView2;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        imageView = findViewById(R.id.imageView);
        imageView2 = findViewById(R.id.imageView2);

    }

    public void btnclick(View view) {
        switch (view.getId()){
            case R.id.btnup:
                imageView.setImageResource(R.drawable.image01);
                imageView2.setImageResource(0);
                break;
            case R.id.btndown:
                imageView2.setImageResource(R.drawable.image02);
                imageView.setImageResource(0);
                break;
        }
    }
}

 

실행화면

초기 실행 사진

 

상하좌우 이동

아래 버튼 클릭

상하좌우 이동

 

도전 04

 SMS 입력 화면 만들고 글자의 수 표시하기

 

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" >

    <EditText
        android:id="@+id/editText"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:ems="10"
        android:hint="내용 입력"
        android:inputType="textPersonName" />

    <TextView
        android:id="@+id/textView"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:gravity="right"
        android:text="10 / 80 바이트" />

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal">

        <Button
            android:id="@+id/button"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:text="전송" />

        <Button
            android:id="@+id/button2"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:text="닫기" />
    </LinearLayout>
</LinearLayout>

 

JAVA

package com.example.tistory;

import androidx.appcompat.app.AppCompatActivity;

import android.os.Bundle;
import android.text.Editable;
import android.text.TextWatcher;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity {
    TextView textView;
    EditText editText;
    Button button;
    Button button2;

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

        editText = findViewById(R.id.editText);
        textView = findViewById(R.id.textView);
        button = findViewById(R.id.button);
        button2 = findViewById(R.id.button2);

        button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Toast.makeText(MainActivity.this, editText.getText().toString() + " 전송 완료", Toast.LENGTH_SHORT).show();
                editText.setText("");
            }
        });
        button2.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                finish();
            }
        });

        editText.addTextChangedListener(new TextWatcher() {
            @Override
            public void beforeTextChanged(CharSequence s, int start, int count, int after) {

            }

            @Override
            public void onTextChanged(CharSequence s, int start, int before, int count) {
                textView.setText(Integer.toString(s.toString().length()) + " / 80 바이트");
            }

            @Override
            public void afterTextChanged(Editable s) {

            }
        });
    }
}

에디트 박스에 입력

전송 버튼 클릭

도전 03 XML

activity_main1.xml

0.00MB

도전 04 XML

activity_main.xml

0.00MB

 

 

do it 안드로이드 도전 과제 도전 03 ~ 04.txt

0.00MB