Android Studio 11일차

액티비티를 사용한 선호도 투표.

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

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.widget.Button;
import android.widget.ImageButton;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.Toast;

import java.util.ArrayList;
import java.util.List;

public class MainActivity extends AppCompatActivity {
    int voteCount[] = new int[9];// 각 명화별 투표횟수 저장.
    String imgName[] = {"독서하는 소녀", "꽃장식 모자 소녀", "부채를 든 소녀",
            "이레느깡 단 베르양", "잠자는 소녀", "테라스의 두 자매", "피아노 레슨"
            , "피아노 앞의 소녀들", "해변에서"};

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        setTitle("명화 선호도 투표");
        for (int i = 0; i < 9; i++) {
            voteCount[i] = 0;// 9 개 배열방에 0 으로 초기화.
            Log.d("for_loop : ", "" + i);
        }
        // 9 개의 이미지 버튼 객체배열
        ImageView image[] = new ImageView[9];
        // 9 개의 이미지버튼 ID 배열
        Integer imageId[] = {R.id.iv1, R.id.iv2, R.id.iv3, R.id.iv4,
                R.id.iv5,
                R.id.iv6, R.id.iv7, R.id.iv8, R.id.iv9};
        for (int i = 0; i < imageId.length; i++) {
            final int index; // 주의! 꼭 필요함..
            index = i;
            image[index] = (ImageView) findViewById(imageId[index]);
            image[index].setOnClickListener(new View.OnClickListener() {
                public void onClick(View v) {
                    // 투표수 증가.
                    voteCount[index]++;
                    // voteCount[0]++; 후치, voteCount[0]=voteCount[0]+1;
                    // 우선 할당하고, 다음에 증가.
                    Toast.makeText(getApplicationContext(),
                            imgName[index] + ": 총 " + voteCount[index] + " 표",
                            Toast.LENGTH_SHORT).show();
                }
            });
        }
        Button bt = findViewById(R.id.button2);
        // 투표 종료 버튼을 누른다면,
        bt.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent intent = new Intent(getApplicationContext(),
                        SecondActivity.class);
                intent.putExtra("VoteCount", voteCount);
                // 인덴트라는 일종의 우편물에 VoteCount 라는 이름으로 voteCount 배열을
                전달.
                        intent.putExtra("ImageName", imgName);
                startActivity(intent);
            }
        });
    }
}

MainActivity

import androidx.appcompat.app.AppCompatActivity;

import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.RatingBar;
import android.widget.TextView;

public class SecondActivity extends AppCompatActivity {
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_second);
        setTitle("투표 결과");
        // 앞 화면에서 보낸 투표 결과 값을 받는다.
        Intent intent = getIntent();
        int[] voteResult = intent.getIntArrayExtra("VoteCount");// 숫자 배열
        String[] imageName = intent.getStringArrayExtra("ImageName");//
        문자열 배열
        // 9 개의 TextView, RatingBar 객체배열
        TextView tv[] = new TextView[imageName.length];
        RatingBar rbar[] = new RatingBar[imageName.length];
        // 9 개의 TextView, RatingBar ID 배열
        Integer tvID[] = {R.id.tv1, R.id.tv2, R.id.tv3, R.id.tv4, R.id.tv5,
                R.id.tv6, R.id.tv7, R.id.tv8, R.id.tv9};
        Integer rbarID[] = {R.id.rbar1, R.id.rbar2, R.id.rbar3, R.id.rbar4,
                R.id.rbar5, R.id.rbar6, R.id.rbar7, R.id.rbar8, R.id.rbar9};
        // TextView, RatingBar 개체 찾기.
        for (int i = 0; i < voteResult.length; i++) {
            tv[i] = (TextView) findViewById(tvID[i]);
            rbar[i] = (RatingBar) findViewById(rbarID[i]);
        }
        // 각 TextVeiw 및 RatingBar 에 넘겨 받은 값을 반영.
        for (int i = 0; i < voteResult.length; i++) {
            tv[i].setText(imageName[i]);
            rbar[i].setRating((float) voteResult[i]);
        }
        Button btBack = findViewById(R.id.btBack);
        btBack.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                finish();
            }
        });
    }
}

SecondActivity

 

 

양방향 activity 예제

public class MainActivity extends AppCompatActivity {
    ArrayList<String> midList = new ArrayList<>();

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

        ListView list = findViewById(R.id.listView1);
        EditText edtItem = (EditText) findViewById(R.id.et1);
        Button btnAdd = (Button) findViewById(R.id.button);

        ArrayAdapter<String> adapter = new ArrayAdapter<String>(this,
                android.R.layout.simple_list_item_1, midList);
        list.setAdapter(adapter);

        btnAdd.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                midList.add(edtItem.getText().toString());
                //에디트 텍스트의 내용을 가져다가 어레이 리스트에 추가.
                adapter.notifyDataSetChanged();
                // 리스트 새로고침.
            }
        });

        list.setOnItemLongClickListener(new AdapterView.OnItemLongClickListener() {
            @Override
            public boolean onItemLongClick(AdapterView<?> parent, View view, int position
                    , long id) {
                midList.remove(position);
                adapter.notifyDataSetChanged();
                return false;
            }
        });
    }
}

 

 

 

그리드뷰 영화 포스터 만들기.

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

    <ImageView
        android:id="@+id/ivPoster"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        app:srcCompat="@android:drawable/btn_star_big_on" />
</LinearLayout>

dialog.xml 레이아웃리소스 만들기

package com.example.test25;

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

import android.content.Context;
import android.os.Bundle;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.GridLayout;
import android.widget.GridView;
import android.widget.ImageView;

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        setTitle("그리드뷰 영화 포스터");

        GridView gv = findViewById(R.id.gridView1);
        MyGridAdapter gAdapter = new MyGridAdapter(this);
        gv.setAdapter(gAdapter);
    }
    //이전의 MyGraphicView 처리와 비슷
    public class MyGridAdapter extends BaseAdapter{
        Context context;
        public MyGridAdapter(Context c){
            context = c;
        }
        Integer[] posterID = { R.drawable.mov01, R.drawable.mov02,
                R.drawable.mov03, R.drawable.mov04, R.drawable.mov05,
                R.drawable.mov06, R.drawable.mov07, R.drawable.mov08,
                R.drawable.mov09, R.drawable.mov10, 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,
                R.drawable.mov21, R.drawable.mov22, R.drawable.mov23,
                R.drawable.mov24, R.drawable.mov25, R.drawable.mov26,
                R.drawable.mov27, R.drawable.mov28, R.drawable.mov29,
                R.drawable.mov30 };

        @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 ViewGroup.LayoutParams(200,300));
            imageView.setScaleType(ImageView.ScaleType.FIT_CENTER);
            imageView.setPadding(5,5,5,5);

            imageView.setImageResource(posterID[position]);

            final int pos = position;
            imageView.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    View dialogView = View.inflate(MainActivity.this, R.layout.dialog, null);
                    AlertDialog.Builder dlg = new AlertDialog.Builder(MainActivity.this);
                    ImageView ivPoster= dialogView.findViewById(R.id.ivPoster);
                    ivPoster.setImageResource(posterID[pos]);
                    dlg.setTitle("큰 포스터");
                    dlg.setIcon(R.drawable.movie_icon);
                    dlg.setView(dialogView);
                    dlg.setNegativeButton("닫기",null);
                    dlg.show();
                }
            });
            return imageView;
        }
    }
}