Android Studio 12일차

가수 그룹 관리 DB만들기

DB browser 다운로드.

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_margin="4dp"
        android:orientation="horizontal">

        <TextView
            android:id="@+id/textView"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:text="이름" />

        <EditText
            android:id="@+id/etName"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:ems="10"
            android:inputType="textPersonName" />

    </LinearLayout>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_margin="4dp"
        android:orientation="horizontal">

        <TextView
            android:id="@+id/textView2"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:text="인원" />

        <EditText
            android:id="@+id/etNumber"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:ems="10"
            android:inputType="number" />
    </LinearLayout>

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

        <Button
            android:id="@+id/btInit"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_margin="10dp"
            android:layout_weight="1"
            android:text="초기화" />

        <Button
            android:id="@+id/btInsert"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_margin="10dp"
            android:layout_weight="1"
            android:text="입력" />

        <Button
            android:id="@+id/btSelect"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_margin="10dp"
            android:layout_weight="1"
            android:text="조회" />
    </LinearLayout>

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

        <EditText
            android:id="@+id/etNameResult"
            android:layout_width="wrap_content"
            android:layout_height="match_parent"
            android:layout_weight="1"
            android:lines="10"/>

        <EditText
            android:id="@+id/etNumberResult"
            android:layout_width="wrap_content"
            android:layout_height="match_parent"
            android:background="@color/teal_200"
            android:layout_weight="1"
            android:lines="10" />
    </LinearLayout>
</LinearLayout>

레이아웃

package com.example.test27;

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

import android.content.Context;
import android.database.Cursor;
import android.database.DatabaseErrorHandler;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity {

    myDBHelper myHelper;
    EditText edtName, edtNumber, edtNameResult, edtNumberResult;
    Button btnInit, btnInsert, btnSelect;
    SQLiteDatabase sqlDB;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        setTitle("가수 그룹 관리 DB");

        edtName = findViewById(R.id.etName);
        edtNumber = findViewById(R.id.etNumber);
        edtNameResult = findViewById(R.id.etNameResult);
        edtNumberResult = findViewById(R.id.etNumberResult);
        btnInit = findViewById(R.id.btInit);
        btnInsert = findViewById(R.id.btInsert);
        btnSelect = findViewById(R.id.btSelect);

        myHelper = new myDBHelper(this);

        btnInit.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                sqlDB = myHelper.getWritableDatabase();
                myHelper.onUpgrade(sqlDB, 1, 2);
                sqlDB.close();
            }
        });
        btnInsert.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                sqlDB = myHelper.getWritableDatabase();
                sqlDB.execSQL("INSERT INTO groupTBL VALUES('" + edtName.getText().toString() + "'," + edtNumber.getText().toString() + ")");
                sqlDB.close();
                Toast.makeText(getApplicationContext(), "입력됨", Toast.LENGTH_SHORT).show();
            }
        });
        btnSelect.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                sqlDB = myHelper.getReadableDatabase();
                Cursor cursor;
                cursor = sqlDB.rawQuery("SELECT * FROM groupTBL;", null);

                String strNames = "그룹이름" + "\r\n" + "------" + "\r\n";
                String strNumbers = "인원" + "\r\n" + "------" + "\r\n";

                while (cursor.moveToNext()) {
                    strNames += cursor.getString(0) + "\r\n";
                    strNumbers += cursor.getString(1) + "\r\n";
                }
                edtNameResult.setText(strNames);
                edtNumberResult.setText(strNumbers);

                cursor.close();
                sqlDB.close();
            }
        });
    }

    public class myDBHelper extends SQLiteOpenHelper {

        public myDBHelper(@Nullable Context context) {
            super(context, "groupDB", null, 1);
        }


        @Override
        public void onCreate(SQLiteDatabase db) {
            db.execSQL("CREATE TABLE groupTBL ( gName CHAR(20) PRIMARY KEY" + ", gNumber INTEGER);");
        }

        @Override
        public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
            db.execSQL("DROP TABLE IF EXISTS groupTBL");
            onCreate(db);

        }
    }

}

MainActivity

갤러리 영화 포스터 만들기.

package com.example.test27;

import androidx.activity.result.ActivityResult;
import androidx.activity.result.ActivityResultCallback;
import androidx.activity.result.ActivityResultLauncher;
import androidx.activity.result.contract.ActivityResultContracts;
import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import androidx.appcompat.app.AlertDialog;
import androidx.appcompat.app.AppCompatActivity;
import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.BlurMaskFilter;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.EmbossMaskFilter;
import android.graphics.Paint;
import android.os.Bundle;
import android.util.Log;
import android.view.Menu;
import android.view.MenuItem;
import android.view.MotionEvent;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.BaseAdapter;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Gallery;
import android.widget.GridView;
import android.widget.ImageButton;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.ListView;
import android.widget.Toast;
import java.util.ArrayList;
import java.util.List;
public class MainActivity extends AppCompatActivity {
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        setTitle("갤러리 영화 포스터");
        Gallery gallery = findViewById(R.id.gallery1);
        // 동작이 안 되는 것은 아니지만, 앞으로 사용을 비추함.
        MyGalleryAdapter galAdapter = new MyGalleryAdapter(this);
        gallery.setAdapter(galAdapter);
    }
    public class MyGalleryAdapter extends BaseAdapter {
        // 멤버 변수
        Context context;
        // 이미지 아이디
        Integer[] posterID = {R.drawable.mov11, R.drawable.mov12,
                R.drawable.mov13, R.drawable.mov14, R.drawable.mov15,
                R.drawable.mov16, R.drawable.mov17, R.drawable.mov18,
                R.drawable.mov19, R.drawable.mov20};
        // 생성자
        public MyGalleryAdapter(Context c) {
            context = c;
        }
        @Override
        public int getCount() {
            return posterID.length;
        }
        @Override
        public Object getItem(int position) {
            return null;
        }
        @Override
        public long getItemId(int position) {
            return 0;
        }
        @Override
        public View getView(int position, View convertView, ViewGroup
                parent) {
            ImageView imageview = new ImageView(context);
            imageview.setLayoutParams(new Gallery.LayoutParams(200, 300));
            imageview.setScaleType(ImageView.ScaleType.FIT_CENTER);
            imageview.setPadding(5, 5, 5, 5);
            imageview.setImageResource(posterID[position]);
            imageview.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    ImageView ivPoster = findViewById(R.id.ivPoster);
                    ivPoster.setScaleType(ImageView.ScaleType.FIT_CENTER);
                    ivPoster.setImageResource(posterID[position]);
                }
            });
            return imageview;
        }
    }
}

미디어 플레이어 예시

package com.example.test27;

import android.media.MediaPlayer;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.ProgressBar;
import android.widget.SeekBar;
import android.widget.TextView;

import androidx.appcompat.app.AppCompatActivity;
public class MainActivity extends AppCompatActivity {

    @Override
    public void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        ProgressBar pb1;
        Button btnInc, btnDec;

        pb1 = findViewById(R.id.progressBar);
        btnInc = findViewById(R.id.btInc);
        btnDec = findViewById(R.id.btDec);
        TextView tvSeek = findViewById(R.id.tvSeek);
        SeekBar seekbar1 = findViewById(R.id.seekBar);

        btnInc.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                pb1.incrementProgressBy(10);
            }
        });
        btnDec.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                pb1.incrementProgressBy(-10);
            }
        });
        seekbar1.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
            @Override
            public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {
                //시크바가 변화 한다면
                tvSeek.setText("진행률 : " + progress + " %");
            }

            @Override
            public void onStartTrackingTouch(SeekBar seekBar) {
                //시크바를 간주 점프 시작.

            }

            @Override
            public void onStopTrackingTouch(SeekBar seekBar) {
                //시크바 간주 점프 동작 마침.

            }
        });
    }
}

시크바 사용 예시

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

import androidx.appcompat.app.AppCompatActivity;
public class MainActivity extends AppCompatActivity {

    @Override
    public void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        ProgressBar pb1 = findViewById(R.id.seekBar2);
        ProgressBar pb2 = findViewById(R.id.seekBar3);
        Button bt= findViewById(R.id.button6);

        bt.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                for (int i = 0; i < 100; i++) {
                    pb1.setProgress(pb1.getProgress() + 2);
                    pb2.setProgress(pb2.getProgress() + 1);
                    SystemClock.sleep(100);
                }
            }
        });
    }
}

스레드를 이용한 프로그레스바 사용 예시

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

import androidx.appcompat.app.AppCompatActivity;
public class MainActivity extends AppCompatActivity {

    @Override
    public void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        Button bt = findViewById(R.id.bt);
        ProgressBar pb1,pb2;
        pb1 = findViewById(R.id.pb1);
        pb2 = findViewById(R.id.pb2);
        TextView tv1 = findViewById(R.id.tv1);
        TextView tv2 =findViewById(R.id.tv2);

        bt.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                new Thread(){
                    @Override
                    public void run() {
//                        super.run();
                        for (int i = pb1.getProgress(); i < 100; i = i+2){
                            runOnUiThread(new Runnable() {
                                @Override
                                public void run() {
                                    pb1.setProgress(pb1.getProgress() + 2);
                                    tv1.setText("1번 진행률" + pb1.getProgress() + "%");
                                }
                            });
                            SystemClock.sleep(100);
                        }
                    }
                }.start();

                new Thread(){
//                    @Override
                    public void run() {
//                        super.run();
                        for (int i = pb2.getProgress(); i < 100; i = i++){
                            runOnUiThread(new Runnable() {
                                @Override
                                public void run() {
                                    pb2.setProgress(pb2.getProgress() + 1);
                                    tv2.setText("2번 진행률" + pb2.getProgress() + "%");
                                }
                            });
                            SystemClock.sleep(100);
                        }
                    }
                }.start();
            }
        });
    }
}

안드로이드 스튜디오 에서 구글 지도 이용해보기

// 아래 디지털 지문 생성은 파워셀은 안되고 명령 프롬프트에서 처리 바랍니다.

keytool -list -v -alias androiddebugkey -keystore %USERPROFILE%\.android\debug.keystore

비번 : android

https://console.cloud.google.com/apis/library/maps-android-backend.googleapis.com

android studio 내의 sdk manager 에서 google play service 설치

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.test27">
    
    <uses-permission android:name="android.permission.INTERNET" />
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
    <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
    <uses-permission android:name="com.google.android.providers.gsf.permission.READ_GSERVICES" />

    <meta-data
        android:name="com.google.android.gms.version"
        android:value="@integer/google_play_services_version" />

    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:roundIcon="@mipmap/ic_launcher_round"
        android:supportsRtl="true"
        android:theme="@style/Theme.Test27">
        <activity
            android:name=".MainActivity"
            android:exported="true">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>

        <meta-data
            android:name="com.google.android.maps.v2.API_KEY"
            android:value="받은 API값 입력" />
        <uses-library
            android:name="org.apache.http.legacy"
            android:required="false" />

    </application>

</manifest>