11. 멀티터치(Multitouch), 인텐트(Intent), Intent_Bundle, Result_Return

1. 멀티터치(Multitouch)

package org.android.soldesk.multitouch_01;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.FloatMath;
import android.view.MotionEvent;

public class Multitouch_01Activity extends AppCompatActivity {


    MultitouchView mMultitouchView;

    private final static int NORMAL_MODE = 1;
    private final static int ZOOM_MODE = 2;

    private float oldDistance;
    private float newDistance;
    private int mode = NORMAL_MODE;


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
    //    setContentView(R.layout.activity_multitouch_01);

        mMultitouchView = new MultitouchView(this);

        setContentView(mMultitouchView);
    }

    public boolean onTouchEvent(MotionEvent event)
    {
        switch (event.getAction())
        {
            case MotionEvent.ACTION_POINTER_2_DOWN:
            {
                float x = event.getX(0) - event.getX(1);
                float y = event.getY(0) - event.getY(1);

                oldDistance = (float) Math.sqrt(x*x + y*y);
                newDistance = oldDistance;

                if (oldDistance > 10f)
                {
                    mode = ZOOM_MODE;
                }
                else
                {
                    mode = NORMAL_MODE;
                    oldDistance = 0.0f;
                    newDistance = 0.0f;
                }
            }
            break;

            case MotionEvent.ACTION_MOVE:
            {
                if (mode == ZOOM_MODE)
                {
                    float x = event.getX(0) - event.getX(1);
                    float y = event.getY(0) - event.getY(1);

                    newDistance = (float) Math.sqrt(x*x + y*y);

                    if (newDistance > 10f)
                    {
                        float scale = newDistance / oldDistance;
                        mMultitouchView.setScale(scale);
                        mMultitouchView.invalidate();
                    }
                    else {
                        mode = NORMAL_MODE;
                        oldDistance = 0.0f;
                        newDistance = 0.0f;
                    }
                }
            }
            break;
        }
        return super.onTouchEvent(event);
    }
}

<java>

package org.android.soldesk.multitouch_01;


import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.Rect;
import android.view.View;

public class MultitouchView extends View{

    private int posX = 0;
    private int posY = 0;
    private float scale = 1f;

    private Bitmap image;

    public MultitouchView(Context context) {
        super(context);

        image = BitmapFactory.decodeResource(context.getResources(),R.drawable.ab);
    }

    public void setScale(float scale)
    {
        this.scale = scale;
    }

    @Override
    protected void onDraw(Canvas canvas)
    {
        if (image != null)
        {
            Rect srcRect = new Rect(0,0,image.getWidth(),image.getHeight());

            int width = (int) (image.getWidth()*scale);
            int height = (int) (image.getHeight()*scale);

            posX = (image.getWidth() - width) /2;
            posY = (image.getHeight() - height) /2;

            Rect dstRect;

            dstRect = new Rect(posX,posY,posX+width,posY+height);

            canvas.drawBitmap(image,srcRect,dstRect,null);

        }
    }
}

<MultitouchView>

2. 인텐트(Intent)

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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:orientation="vertical"
    tools:context="org.android.soldesk.intentdto.IntentDtoActivity">

    <EditText
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/editName"
        android:ems="10"
        android:hint="이름을 입력하세요"
        >
        <requestFocus/>
        </EditText>

    <EditText
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/editAge"
        android:ems="10"
        android:hint="나이를 입력하세요"
        />

    <EditText
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/editAddress"
        android:ems="10"
        android:hint="주소를 입력하세요"
        />
    <EditText
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/editAa"
        android:ems="10"
        android:hint="월급을 입력하세요"
        />
    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/btnSend"
        android:text="전송"
        />
</LinearLayout>

<xml>

package org.android.soldesk.intentdto;

import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;

public class IntentDtoActivity extends AppCompatActivity {

    EditText editName;
    EditText editAge;
    EditText editAddress;
    EditText editAa;
    Button btnSend;

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

        editName = (EditText) findViewById(R.id.editName);
        editAge = (EditText) findViewById(R.id.editAge);
        editAddress = (EditText) findViewById(R.id.editAddress);
        editAa = (EditText) findViewById(R.id.editAa);

        btnSend = (Button) findViewById(R.id.btnSend);

        btnSend.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {

                // 입력 데이타 얻기
                String name = editName.getText().toString();
                String age = editAge.getText().toString();
                String address = editAddress.getText().toString();
                String aa = editAa.getText().toString();

                // 직렬화 객체에 저장

                Person pp = new Person();
                pp.setName(name);
                pp.setAge(Integer.parseInt(age));
                pp.setAddress(address);
                pp.setAa(Integer.parseInt(aa));

                // 인텐트 생성 및 직렬화 객체 저장

                Intent intent = new Intent(getApplicationContext(),NextActivity.class);
                intent.putExtra("person", pp);

                startActivity(intent);
            }
        });
    }
}

<java>

package org.android.soldesk.intentdto;


import android.content.Intent;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;

public class NextActivity extends AppCompatActivity {

    TextView txtResult;
    Button btnBack;

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

    txtResult = (TextView) findViewById(R.id.txtResult);

        // 인텐트 얻기

        Intent intent = getIntent();

        // 직렬화 객체 얻기
        Person pp = (Person) intent.getSerializableExtra("person");

        String name = pp.getName();
        int age = pp.getAge();
        String address =pp.getAddress();
        int aa = pp.getAa();

        String msg = "이름 : " +name+ ", 나이 : " +age+ ", 주소 : "+address+", 월급 : "+(aa*1.5) ;
        txtResult.setText(msg);

        btnBack = (Button) findViewById(R.id.btnBack);

        btnBack.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                finish();
            }
        });
    }
}

<NextActivity.java>

package org.android.soldesk.intentdto;


import java.io.Serializable;

public class Person implements Serializable{

    String name;
    int age;
    String address;
    int aa;

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public int getAge() {
        return age;
    }

    public void setAge(int age) {
        this.age = age;
    }

    public String getAddress() {
        return address;
    }

    public void setAddress(String address) {
        this.address = address;
    }

    public int getAa() {
        return aa;
    }

    public void setAa(int aa) {
        this.aa = aa;
    }
}

<Person.java>

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

    <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/AppTheme">
        <activity android:name=".IntentDtoActivity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

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

        <!-- 액티비티 등록 -->
        <activity
            android:name=".NextActivity"
            android:label="NextActivity 이에요 ~~~~~"
            />
    </application>

</manifest>

<AndroidManifest.xml>

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

    <TextView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/txtResult"
        android:text="전송된 데이타 출력"
        android:textAppearance="?android:attr/textAppearanceLarge"
        />

    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/btnBack"
        android:text="뒤로가자~~~"
        />

</LinearLayout>

<next.xml>

3. Intent_Bundle

<?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="org.android.soldesk.intent_bundle_01.Intent_Bundle_01Activity">

    <EditText
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/editName"
        android:ems="10"
        android:hint="이름을 입력하세요"
        >

        <requestFocus/>
        </EditText>

    <EditText
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/editAge"
        android:ems="10"
        android:hint="나이를 입력하세요"
        />
    <EditText
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/editAddress"
        android:ems="10"
        android:hint="주소를 입력하세요"
        />

    <EditText
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/editAa"
        android:ems="10"
        android:hint="전화번호를 입력하세요"
        />

    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/btnSend"
        android:text="전송송~~~"
        />

</LinearLayout>

<xml>

package org.android.soldesk.intent_bundle_01;

import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;

public class Intent_Bundle_01Activity extends AppCompatActivity {

    EditText editName;
    EditText editAge;
    EditText editAddress;
    EditText editAa;
    Button btnSend;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_intent__bundle_01);

        editName = (EditText) findViewById(R.id.editName);
        editAge = (EditText) findViewById(R.id.editAge);
        editAddress = (EditText) findViewById(R.id.editAddress);
        editAa = (EditText) findViewById(R.id.editAa);

        btnSend = (Button) findViewById(R.id.btnSend);

        btnSend.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {

                // 입력 데이타 얻기

                String name = editName.getText().toString();
                String age = editAge.getText().toString();
                String address = editAddress.getText().toString();
                String aa = editAa.getText().toString();

                // Bundle 객체에 저장
                Bundle bundle = new Bundle();

                // Bundle 는 key, value 쌍으로 이루어진
                // 일종의 해쉬 맵 자료 구조

                bundle.putString("name",name);
                bundle.putInt("age",Integer.parseInt(age));
                bundle.putString("address",address);
                bundle.putString("aa",aa);

                //인텐트 생성 및 데이타 저장

                Intent intent = new Intent(getApplicationContext(),NextActivity.class);
                intent.putExtra("bundle",bundle);
                startActivity(intent);
            }
        });
    }
}

<java>

package org.android.soldesk.intent_bundle_01;


import android.content.Intent;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;

public class NextActivity extends AppCompatActivity {

    TextView txtResult;
    Button btnBack;

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

        txtResult = (TextView) findViewById(R.id.txtResult);

        // 인텐트 얻기
        Intent intent = getIntent();

        // Bundle 객체 얻기
        Bundle bundle = intent.getBundleExtra("bundle");

        String name = bundle.getString("name");
        int age = bundle.getInt("age");
        String address = bundle.getString("address");
        String aa = "010-";
        aa += bundle.getString("aa");

        String msg = " \n 이름 : " +name+ " \n 나이 : " +age+ " \n 주소 : " +address+ " \n 전화번호 : "+aa;

        txtResult.setText(msg);

        btnBack = (Button) findViewById(R.id.btnBack);

        btnBack.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                finish();
            }
        });
    }
}

<NextActivity>

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="org.android.soldesk.intent_bundle_01">

    <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/AppTheme">
        <activity android:name=".Intent_Bundle_01Activity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <activity
            android:name=".NextActivity"
            android:label="NextActivity Test ~~~~~"/>
    </application>

</manifest>

<AndroidManifest.xml>

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

    <TextView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/txtResult"
        android:text="전달된 Bundle 데이타 출력"
        android:textAppearance="?android:attr/textAppearanceLarge"
        />

    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/btnBack"
        android:text="뒤뒤로~~~~"
        />
</LinearLayout>

<next.xml>

4. Result_Return

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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:orientation="vertical"
    tools:context="org.android.soldesk.result_return_01.Result_Return_01Activity">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical"
        >
        <EditText
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:id="@+id/editValue01"
            android:ems="10"
            android:hint="첫번째 값을 입력하세요"
            >
            <requestFocus/>
            </EditText>

        <EditText
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:id="@+id/editValue02"
            android:ems="10"
            android:hint="두번째 값을 입력하세요"
            />

        <EditText
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:id="@+id/editValue03"
            android:ems="10"
            android:hint="세번째 값을 입력하세요"
            />

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content">
            <Button
                android:layout_width="0dp"
                android:layout_height="wrap_content"
                android:layout_weight="1"
                android:id="@+id/butAdd"
                android:text="+"
                />

            <Button
                android:id="@+id/butSub"
                android:layout_width="0dp"
                android:layout_height="wrap_content"
                android:layout_weight="1"
                android:text="-" />

            <Button
                android:layout_width="0dp"
                android:layout_height="wrap_content"
                android:layout_weight="1"
                android:id="@+id/butMul"
                android:text="*"
                />
            <Button
                android:layout_width="0dp"
                android:layout_height="wrap_content"
                android:layout_weight="1"
                android:id="@+id/butDiv"
                android:text="/"
                />

        </LinearLayout>

        <TextView
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:id="@+id/txtResult"
            android:text="결과는 여기에 나온다"
            android:textAppearance="?android:attr/textAppearanceLarge"
            />
    </LinearLayout>
</LinearLayout>

<xml>

package org.android.soldesk.result_return_01;

import android.content.DialogInterface;
import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;

public class Result_Return_01Activity extends AppCompatActivity implements View.OnClickListener{

    EditText editValue1;
    EditText editValue2;
    EditText editValue3;

    Button btnAdd;
    Button btnSub;
    Button btnMul;
    Button btnDiv;

    TextView txtResult;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_result__return_01);

        editValue1 = (EditText) findViewById(R.id.editValue01);
        editValue2 = (EditText) findViewById(R.id.editValue02);
        editValue3 = (EditText) findViewById(R.id.editValue03);

        btnAdd = (Button) findViewById(R.id.butAdd);
        btnSub = (Button) findViewById(R.id.butSub);
        btnMul = (Button) findViewById(R.id.butMul);
        btnDiv = (Button) findViewById(R.id.butDiv);

        txtResult = (TextView) findViewById(R.id.txtResult);

        btnAdd.setOnClickListener(this);
        btnSub.setOnClickListener(this);
        btnMul.setOnClickListener(this);
        btnDiv.setOnClickListener(this);

    }

    @Override
    public void onClick(View v) {

        // 입력값과 연산자 얻기

        double value1 = Double.parseDouble(editValue1.getText().toString());
        double value2 = Double.parseDouble(editValue2.getText().toString());
        double value3 = Double.parseDouble(editValue3.getText().toString());

        char op = ((Button)v).getText().charAt(0);

        // 인텐트 생성 및 전달

        Intent intent = new Intent(getApplicationContext(),CalcActivity.class);
        intent.putExtra("value1",value1);
        intent.putExtra("value2",value2);
        intent.putExtra("value3",value3);
        intent.putExtra("op",op);

        startActivityForResult(intent, 1); // requestCode : 1 는 요청을 식별
        // 객체를 전달하고 전달한 Activity로 부터 결과값을 onActivityResult 가 받음
    }
    @Override
    protected void onActivityResult(int requestCode,int resultCode, Intent data) {
        super.onActivityResult(requestCode,resultCode,data);

        switch (resultCode)
        {
            case AppCompatActivity.RESULT_OK:
                Double result = data.getDoubleExtra("result", 0.0);
                txtResult.setText("결과 : "+Double.toString(result));
                break;
        }
    }
}

<java>

package org.android.soldesk.result_return_01;


import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;

public class CalcActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        // 인텐트 값 전달

        Intent intent = getIntent();

        double value01 = intent.getDoubleExtra("value1",0);
        double value02 = intent.getDoubleExtra("value2",0);
        double value03 = intent.getDoubleExtra("value3",0);

        char op = intent.getCharExtra("op",'+');

        double result = 0;

        switch (op)
        {
            case '+':
                result = (value01 - value02) + value03;
                break;
            case '-':
                result = (value01 + value02) - value03;
                break;
            case '*':
                result = (value01 + value02) * value03;
                break;
            case '/':
                result = (value01 - value02) / value03;
                break;
        }

        // 결과 값 전달
        intent.putExtra("result",result);
        setResult(Activity.RESULT_OK,intent);

        finish();

    }
}

<CalcActivity.java>

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="org.android.soldesk.result_return_01">

    <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/AppTheme">
        <activity android:name=".Result_Return_01Activity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <activity
            android:name=".CalcActivity"
            android:label="CalcActivity Test"/>
    </application>

</manifest>

<AndroidManifest.xml>