대화상자 (Dialog): AlertDialog

대화상자 (Dialog)

1. AlertDialog (경고창)

모듈은 empty activity로.

1) 레이아웃

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context="com.progdv.alertdialog.MainActivity">

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

        <Button
            android:id="@+id/btn"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Android Alert Dialog" />

    </LinearLayout>


</RelativeLayout>

2) 기능구현

package com.progdv.alertdialog;

import android.app.Dialog;
import android.content.DialogInterface;
import android.os.Bundle;
import android.support.v7.app.AlertDialog;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.Button;

public class MainActivity extends AppCompatActivity {
    private static final int DIALOG_ID = 1;

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

        // 버튼에 리스너 등록 및 이벤트 처리
        Button btn = (Button)findViewById(R.id.btn);
        btn.setOnClickListener(new View.OnClickListener(){
            @Override
            public void onClick(View v) {
                // 다이어로그 창을 띄우기
                showDialog(DIALOG_ID);
            }
        });
    }

    @Override
    protected Dialog onCreateDialog(int id) {
        // return super.onCreateDialog(id);
        AlertDialog.Builder builder = null;
        switch (id) {
            case 1:
                new AlertDialog.Builder(this);
                builder.setIcon(R.drawable.warning)
                        .setTitle("종료 확인 경고창")
                        .setMessage("어플리케이션을 종료합니다.")
                        .setPositiveButton("확인", new DialogInterface.OnClickListener() {
                            @Override
                            public void onClick(DialogInterface dialog, int which) {
                                MainActivity.this.finish(); // 현재 액티비티 종료
                            }
                        })
                .setNegativeButton("취소", new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which) {
                        dialog.cancel(); // 대화상자 취소
                    }
                });
        }
        return builder.create();
    }
}

2. ProgressDialog

3. DatePickerDialog