Android Studio - 사용 권한

2022-08-10(38일차)

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◾ 보통 권한 / 위험 권한

📃전화 걸기 화면 실행

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📝AndroidManifest.xml

 

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.project.test02">

    <uses-permission android:name="android.permission.CALL_PHONE"/>

    <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.Day38">
        <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>
    </application>

</manifest>

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📝activity_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:layout_margin="10dp"
    android:orientation="vertical"
    tools:context=".MainActivity">

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginBottom="20dp"
        android:text="전화 기능 연결 테스트"
        android:textSize="25dp" />

    <EditText
        android:id="@+id/et_dial"
        android:layout_width="250dp"
        android:layout_height="wrap_content"
        android:hint="전화번호를 입력하세요"
        android:textSize="20dp" />

    <Button
        android:id="@+id/btn_call"
        android:onClick="onCallClick"
        android:layout_width="180dp"
        android:layout_height="wrap_content"
        android:layout_gravity="right"
        android:text="전화 화면 열기"
        android:textSize="20dp" />

</LinearLayout>

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📝MainActivity.java

 

package com.project.test02;

import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;
import androidx.core.app.ActivityCompat;
import androidx.core.content.ContextCompat;

import android.Manifest;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.net.Uri;
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
{
    static final int REQCODE_PERMISSION_CALLPHONE = 1;
    EditText et_Number;
    Button btn;

    @Override
    protected void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        Button btn = findViewById(R.id.btn_call);
        et_Number = findViewById(R.id.et_dial);
    }

    public void onCallClick(View view)
    {
        if (ContextCompat.checkSelfPermission(MainActivity.this, Manifest.permission.CALL_PHONE) !=
                PackageManager.PERMISSION_GRANTED)
        {
            //CALL PHONE권한이 없는 경우 권한 승인을 거절한 이력을 확인한다.
            if (ActivityCompat.shouldShowRequestPermissionRationale(MainActivity.this, Manifest.permission.CALL_PHONE))
            {
                Toast.makeText(MainActivity.this, "권한이 없습니다.", Toast.LENGTH_SHORT).show();

            }
            else
            {
                ActivityCompat.requestPermissions(MainActivity.this, new String[]{Manifest.permission.CALL_PHONE},
                        REQCODE_PERMISSION_CALLPHONE);
            }

        }
        else
        {
            //권한을 갖고 있으므로 전화걸기를 시도한다.
            String str = et_Number.getText().toString();
            if (str.length() > 0)
            {
                Intent intent = new Intent(Intent.ACTION_CALL);
                intent.setData(Uri.parse("tel:" + str));
                startActivity(intent);
            }
        }
    }

    @Override
    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults)
    {
        super.onRequestPermissionsResult(requestCode, permissions, grantResults);

        if (requestCode == REQCODE_PERMISSION_CALLPHONE)
        {
            if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED)
            {
                btn = findViewById(R.id.btn_call);
                ((Button) findViewById(R.id.btn_call)).setEnabled(true);
                Toast.makeText(this, "권한을 얻었습니다.\n 버튼을 다시 눌러 통화를 시도하세요", Toast.LENGTH_SHORT).show();
            }
        }
    }
}

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