안드로이드 이론 빡공 6

package com.threedpit.mysnackbar;

import androidx.appcompat.app.AppCompatActivity;

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

import com.google.android.material.snackbar.Snackbar;

public class MainActivity extends AppCompatActivity {

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

        Button btn = findViewById(R.id.button2);
        btn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                /**
                 * 스낵바 생성
                 * (뷰,"문자열",)
                 * */
                Snackbar.make(v,"스낵바입니다.",Snackbar.LENGTH_SHORT).show();
            }
        });
    }
}

package com.threedpit.mysnackbar;

import androidx.appcompat.app.AlertDialog;
import androidx.appcompat.app.AppCompatActivity;

import android.content.DialogInterface;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;

import com.google.android.material.snackbar.Snackbar;

public class MainActivity extends AppCompatActivity {

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

        Button btn = findViewById(R.id.button2);/**스낵바 나오는버튼*/
        Button btn2 = findViewById(R.id.button3);/**대화상자 버튼*/

        /**스낵바 버튼 클릭시 동작*/
        btn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                /**
                 * 스낵바 생성
                 * (뷰,"문자열",Snackbar.LENGTH_SHORT(Long 선택가능)).show();
                 * */
                Snackbar.make(v,"스낵바입니다.",Snackbar.LENGTH_SHORT).show();
            }
        });

        /**대화 상자 버튼 클릭시 동작*/
        btn2.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                showMessage();
            }
        });
    }

    public void showMessage() {
        AlertDialog.Builder builder = new AlertDialog.Builder(this);
        builder.setTitle("안내"); /**타이틀 생성*/
        builder.setMessage("종료 하시겠습니까?");
        /**
         * R.drawable.ic_dialog_alert 이렇게 설정하면 현재 프로젝트 안에서만
         * android.R.drawable.ic_dialog_alert 하면
         * android api에 있는것을 가져다 쓸 수 있다.
         * */
        builder.setIcon(android.R.drawable.ic_dialog_alert);

        /**
         * 버튼 생성하기 긍정 버튼 YES
         * */
        builder.setPositiveButton("예", new DialogInterface.OnClickListener() {
            @Override
            public void onClick(DialogInterface dialog, int which) {
                Toast.makeText(getApplicationContext(), "예버튼 눌림", Toast.LENGTH_SHORT).show();
            }
        });
        /**
         * 버튼 생성하기 긍정 버튼 NO
         * */
        builder.setNegativeButton("아니오", new DialogInterface.OnClickListener() {
            @Override
            public void onClick(DialogInterface dialog, int which) {
                Toast.makeText(getApplicationContext(), "아니오버튼 눌림", Toast.LENGTH_SHORT).show();
            }
        });
        /**
         * 빌더의 작업이 끝나면
         *  AlertDialog dialog = builder.create();이렇게 생성해서
         */
        AlertDialog dialog = builder.create();
        dialog.show();
    }

}

package com.threedpit.myprogress;
import androidx.appcompat.app.AppCompatActivity;

import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.ProgressBar;

public class MainActivity extends AppCompatActivity {

    int value =0;
    ProgressBar prg;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        prg = findViewById(R.id.progressBar);
        Button btn = findViewById(R.id.button);

        btn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                value+=10;/**버튼 누르면 10씩 증가*/
                if(value>100)value=0;
                prg.setProgress(value);/**프로그래스바 표현*/
            }
        });
    }
}

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout 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=".MainActivity">

    <ProgressBar
        android:id="@+id/progressBar"
        style="?android:attr/progressBarStyleHorizontal"
        android:layout_width="300dp"
        android:layout_height="wrap_content"
        android:max="100" <!--맥스값 설정-->
        android:progress="0" <!--초기 표현값은 왠만하면 0으로 하기-->
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        tools:layout_editor_absoluteY="18dp" />

    <Button
        android:id="@+id/button"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="228dp"
        android:text="설정"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.498"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/progressBar" />
</androidx.constraintlayout.widget.ConstraintLayout>