[Android Studio] Chapter 10 직접 풀어보기

[직접 풀어보기]

 

1

activitiy_main.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"
    tools:context=".MainActivity"
    android:orientation="vertical">

    <RadioGroup
        android:layout_width="match_parent"
        android:layout_height="wrap_content">
        <RadioButton
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:id="@+id/second"
            android:text="Second 액티비티"
            android:checked="true"/>
        <RadioButton
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:id="@+id/third"
            android:text="Third 액티비티"/>
    </RadioGroup>

    <Button
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="새 화면 열기"
        android:id="@+id/btnNewActivity"/>

</LinearLayout>

second.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"
    tools:context=".MainActivity">

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Second Activity"/>

    <Button
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="돌아가기"
        android:id="@+id/btnReturn"/>


</LinearLayout>

third.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"
    tools:context=".MainActivity">

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Third Activity"/>

    <Button
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="돌아가기"
        android:id="@+id/btnReturn2"/>


</LinearLayout>

AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.cookandroid.project10_1">

    <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.Project10_1">
        <activity android:name=".MainActivity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <activity android:name=".SecondActivity" android:label="Second 액티비티"/>
        <activity android:name=".ThirdActivity" android:label="Third 액티비티"/>
    </application>

</manifest>

 

 

MainActivity.java

package com.cookandroid.project10_1;

import androidx.appcompat.app.AppCompatActivity;

import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.RadioButton;
import android.widget.RadioGroup;

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        Button btnNewActivity = (Button) findViewById(R.id.btnNewActivity);
        RadioButton second = (RadioButton) findViewById(R.id.second);
        RadioButton third = (RadioButton) findViewById(R.id.third);

        btnNewActivity.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if(third.isChecked()){
                    Intent intent = new Intent(getApplicationContext(), ThirdActivity.class);
                    startActivity(intent);
                } else{
                    Intent intent = new Intent(getApplicationContext(), SecondActivity.class);
                    startActivity(intent);
                }
            }
        });
    }
}

SecondActivity.java

package com.cookandroid.project10_1;

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

import androidx.annotation.Nullable;

public class SecondActivity extends Activity {
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.second);

        Button btnReturn = (Button) findViewById(R.id.btnReturn);
        btnReturn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                finish();
            }
        });
    }
}

ThirdActivity.java

package com.cookandroid.project10_1;

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

import androidx.annotation.Nullable;

public class ThirdActivity extends Activity {
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.third);

        Button btnReturn = (Button) findViewById(R.id.btnReturn2);
        btnReturn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                finish();
            }
        });

    }
}

 

2

01

activitiy_main.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">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="3">
        <ImageView
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:id="@+id/iv1"
            android:layout_margin="5dp"
            android:layout_weight="1"
            android:src="@drawable/acha"/>

        <ImageView
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:id="@+id/iv2"
            android:layout_margin="5dp"
            android:layout_weight="1"
            android:src="@drawable/cchi"/>

        <ImageView
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:id="@+id/iv3"
            android:layout_margin="5dp"
            android:layout_weight="1"
            android:src="@drawable/eevee"/>
    </LinearLayout>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="3">
        <ImageView
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:id="@+id/iv4"
            android:layout_margin="5dp"
            android:layout_weight="1"
            android:src="@drawable/haemu"/>

        <ImageView
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:id="@+id/iv5"
            android:layout_margin="5dp"
            android:layout_weight="1"
            android:src="@drawable/lan"/>

        <ImageView
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:id="@+id/iv6"
            android:layout_margin="5dp"
            android:layout_weight="1"
            android:src="@drawable/nuni"/>
    </LinearLayout>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="3">
        <ImageView
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:id="@+id/iv7"
            android:layout_margin="5dp"
            android:layout_weight="1"
            android:src="@drawable/paeng"/>

        <ImageView
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:id="@+id/iv8"
            android:layout_margin="5dp"
            android:layout_weight="1"
            android:src="@drawable/pichu"/>

        <ImageView
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:id="@+id/iv9"
            android:layout_margin="5dp"
            android:layout_weight="1"
            android:src="@drawable/pika"/>
    </LinearLayout>
    <Button
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:id="@+id/btnResult"
        android:layout_weight="1"
        android:text="투표 종료"/>


</LinearLayout>

result.xml

<?xml version="1.0" encoding="utf-8"?>
<TableLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent" android:layout_height="match_parent"
    android:gravity="center_vertical"
    android:stretchColumns="0"
    android:layout_marginHorizontal="10dp">

    <TableRow>
        <TextView
            android:layout_span="2"
            android:id="@+id/imgTitle"
            android:layout_gravity="center"
            android:textSize="20dp"
            android:text="제목"/>
    </TableRow>
    <TableRow>
        <ImageView
            android:layout_span="2"
            android:id="@+id/imgview"
            android:src="@drawable/pika"/>
    </TableRow>
    <TableRow>
        <TextView
            android:id="@+id/tv1"
            android:layout_gravity="center_vertical"
            android:text="그림1"
            android:textSize="15dp"/>
        <RatingBar
            android:id="@+id/rbar1"
            style="?android:attr/ratingBarStyleIndicator"
            android:layout_gravity="right"></RatingBar>
    </TableRow>
    <TableRow>
        <TextView
            android:id="@+id/tv2"
            android:layout_gravity="center_vertical"
            android:text="그림2"
            android:textSize="15dp"/>
        <RatingBar
            android:id="@+id/rbar2"
            style="?android:attr/ratingBarStyleIndicator"
            android:layout_gravity="right"></RatingBar>
    </TableRow>
    <TableRow>
        <TextView
            android:id="@+id/tv3"
            android:layout_gravity="center_vertical"
            android:text="그림3"
            android:textSize="15dp"/>
        <RatingBar
            android:id="@+id/rbar3"
            style="?android:attr/ratingBarStyleIndicator"
            android:layout_gravity="right"></RatingBar>
    </TableRow>
    <TableRow>
        <TextView
            android:id="@+id/tv4"
            android:layout_gravity="center_vertical"
            android:text="그림4"
            android:textSize="15dp"/>
        <RatingBar
            android:id="@+id/rbar4"
            style="?android:attr/ratingBarStyleIndicator"
            android:layout_gravity="right"></RatingBar>
    </TableRow>
    <TableRow>
        <TextView
            android:id="@+id/tv5"
            android:layout_gravity="center_vertical"
            android:text="그림5"
            android:textSize="15dp"/>
        <RatingBar
            android:id="@+id/rbar5"
            style="?android:attr/ratingBarStyleIndicator"
            android:layout_gravity="right"></RatingBar>
    </TableRow>
    <TableRow>
        <TextView
            android:id="@+id/tv6"
            android:layout_gravity="center_vertical"
            android:text="그림6"
            android:textSize="15dp"/>
        <RatingBar
            android:id="@+id/rbar6"
            style="?android:attr/ratingBarStyleIndicator"
            android:layout_gravity="right"></RatingBar>
    </TableRow>
    <TableRow>
        <TextView
            android:id="@+id/tv7"
            android:layout_gravity="center_vertical"
            android:text="그림7"
            android:textSize="15dp"/>
        <RatingBar
            android:id="@+id/rbar7"
            style="?android:attr/ratingBarStyleIndicator"
            android:layout_gravity="right"></RatingBar>
    </TableRow>
    <TableRow>
        <TextView
            android:id="@+id/tv8"
            android:layout_gravity="center_vertical"
            android:text="그림8"
            android:textSize="15dp"/>
        <RatingBar
            android:id="@+id/rbar8"
            style="?android:attr/ratingBarStyleIndicator"
            android:layout_gravity="right"></RatingBar>
    </TableRow>
    <TableRow>
        <TextView
            android:id="@+id/tv9"
            android:layout_gravity="center_vertical"
            android:text="그림9"
            android:textSize="15dp"/>
        <RatingBar
            android:id="@+id/rbar9"
            style="?android:attr/ratingBarStyleIndicator"
            android:layout_gravity="right"></RatingBar>
    </TableRow>
    <TableRow>
        <Button
            android:id="@+id/btnReturn"
            android:layout_span="2"
            android:text="돌아가기"/>
    </TableRow>
</TableLayout>

 

 

MainActivity.java

package com.cookandroid.project10_2;

import androidx.appcompat.app.AppCompatActivity;

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

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        setTitle("포켓몬 선호도 투표");

        final int voteCount[] = new int[9];
        for (int i = 0; i<9; i++){ voteCount[i] = 0; }

        ImageView image[] = new ImageView[9];
        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};
        final String imgName[] = {"아차모", "찌르성게", "이브이", "해무기", "란클루스", "누니머기", "팽도리", "피츄", "피카츄"};

        for (int i=0; i<imageId.length; i++){
            final int index;
            index = i;
            image[index] = (ImageView) findViewById(imageId[index]);
            image[index].setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    voteCount[index]++;
                    Toast.makeText(getApplicationContext(), imgName[index] + ": 총 "+voteCount[index]+ " 표", Toast.LENGTH_SHORT).show();
                }
            });

            Button btnFinish = (Button) findViewById(R.id.btnResult);
            btnFinish.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    Intent intent = new Intent(getApplicationContext(), ResultActivity.class);
                    intent.putExtra("VoteCount", voteCount);
                    intent.putExtra("ImageName", imgName);
                    startActivity(intent);
                }
            });
        }

    }
}

ResultActivity.java

package com.cookandroid.project10_2;

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

import androidx.annotation.Nullable;

public class ResultActivity extends Activity {
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.result);
        setTitle("투표 결과");

        Intent intent = getIntent();
        int[] voteResult = intent.getIntArrayExtra("VoteCount");
        String[] imageName = intent.getStringArrayExtra("ImageName");

        int highest = 0;

        TextView tv[] = new TextView[imageName.length];
        RatingBar rbar[] = new RatingBar[imageName.length];

        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};
        Integer imageFileID[] = {R.drawable.acha, R.drawable.cchi, R.drawable.eevee, R.drawable.haemu, R.drawable.lan, R.drawable.nuni, R.drawable.paeng, R.drawable.pichu, R.drawable.pika};

        for(int i = 0; i<voteResult.length; i++){
            tv[i] = (TextView) findViewById(tvID[i]);
            rbar[i] = (RatingBar) findViewById(rbarID[i]);
        }

        for(int i = 0; i<voteResult.length; i++){
            tv[i].setText(imageName[i]);
            rbar[i].setRating((float) voteResult[i]);
            if(voteResult[i]>voteResult[highest]){
                highest = i;
            }
        }

        TextView imgTitle = (TextView) findViewById(R.id.imgTitle);
        ImageView imgView = (ImageView) findViewById(R.id.imgview);

        imgTitle.setText(imageName[highest]);
        imgView.setImageResource(imageFileID[highest]);

        Button btnReturn = (Button) findViewById(R.id.btnReturn);
        btnReturn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                finish();
            }
        });
    }
}

 

3

activitiy_main.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:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/edtNum1"/>
    <EditText
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/edtNum2"/>

    <RadioGroup
        android:layout_width="match_parent"
        android:layout_height="wrap_content">
        <RadioButton
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:id="@+id/plus"
            android:checked="true"
            android:text="더하기"/>
        <RadioButton
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:id="@+id/minus"
            android:text="빼기"/>
        <RadioButton
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:id="@+id/multi"
            android:text="곱하기"/>
        <RadioButton
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:id="@+id/division"
            android:text="나누기"/>
    </RadioGroup>

    <Button
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/btnNewActivity"
        android:text="더하기"/>

</LinearLayout>

second.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical" android:layout_width="match_parent"
    android:layout_height="match_parent">
    <Button
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/btnReturn"
        android:text="돌아가기"/>
</LinearLayout>

 

MainActivity.java

package com.cookandroid.a10_3;

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

import android.content.Intent;
import android.os.Bundle;
import android.provider.MediaStore;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.RadioButton;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity {

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

        Button btnNewActivity = (Button) findViewById(R.id.btnNewActivity);
        RadioButton plus, minus, multi, divi;
        plus = (RadioButton) findViewById(R.id.plus);
        minus = (RadioButton) findViewById(R.id.minus);
        multi = (RadioButton) findViewById(R.id.multi);
        divi = (RadioButton) findViewById(R.id.division);

        btnNewActivity.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                EditText edtNum1 = (EditText) findViewById(R.id.edtNum1);
                EditText edtNum2 = (EditText) findViewById(R.id.edtNum2);
                int simbol;
                if(minus.isChecked()){simbol = 2;}
                else if(multi.isChecked()){simbol = 3;}
                else if(divi.isChecked()){simbol = 4;}
                else{simbol=1;}
                Intent intent = new Intent(getApplicationContext(), SecondActivity.class);
                intent.putExtra("Num1", Integer.parseInt(edtNum1.getText().toString()));
                intent.putExtra("Num2", Integer.parseInt(edtNum2.getText().toString()));
                intent.putExtra("Simbol", simbol);
                startActivityForResult(intent, 0);
            }
        });
    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        if (resultCode == RESULT_OK) {
            int hap = data.getIntExtra("Hap", 0);
            Toast.makeText(getApplicationContext(), "답: " + hap, Toast.LENGTH_SHORT).show();
        }
    }
}

SecondActivity.java

package com.cookandroid.a10_3;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;

import androidx.annotation.Nullable;

public class SecondActivity extends Activity {
    @Override
    protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.second);
        setTitle("Second 액티비티");
        int hapValue = 0;
        final int result;

        Intent inIntent = getIntent();
        switch(inIntent.getIntExtra("Simbol", 0)){
            case 1:
                hapValue = inIntent.getIntExtra("Num1", 0)+inIntent.getIntExtra("Num2", 0);
                break;
            case 2:
                hapValue = inIntent.getIntExtra("Num1", 0)-inIntent.getIntExtra("Num2", 0);
                break;
            case 3:
                hapValue = inIntent.getIntExtra("Num1", 0)*inIntent.getIntExtra("Num2", 0);
                break;
            case 4:
                hapValue = inIntent.getIntExtra("Num1", 0)/inIntent.getIntExtra("Num2", 0);
                break;
        }
        result = hapValue;

        Button btnReturn = (Button) findViewById(R.id.btnReturn);
        btnReturn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent outIntent = new Intent(getApplicationContext(), MainActivity.class);
                outIntent.putExtra("Hap", result);
                setResult(RESULT_OK, outIntent);
                finish();
            }
        });
    }
}