연락처 가져오기

* MainActivity.java

public class MainActivity extends AppCompatActivity implements AutoPermissionsListener {

    TextView textView;

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

        textView = findViewById(R.id.textView);

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

        AutoPermissions.Companion.loadAllPermissions(this, 101);
    }

    public void selectContacts() {
        Intent intent = new Intent(Intent.ACTION_PICK, ContactsContract.Contacts.CONTENT_URI);
        startActivityForResult(intent, 101);
    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) {
        super.onActivityResult(requestCode, resultCode, data);

        if (requestCode == 101) {
            if (resultCode == RESULT_OK) {
                Uri contactsUri = data.getData();
                String id = contactsUri.getLastPathSegment();

                getContacts(id);
            }
        }
    }

    public void getContacts(String id) {
        Cursor cursor = null;
        String name = "";

        try {
            cursor = getContentResolver().query(ContactsContract.Data.CONTENT_URI,
                    null,
                    ContactsContract.Data.CONTACT_ID + "=?",
                    new String[] {id},
                    null);
            if (cursor.moveToFirst()) {
                name = cursor.getString(cursor.getColumnIndex(ContactsContract.Data.DISPLAY_NAME));
                println("Name : " + name);

                String columns[] = cursor.getColumnNames();
                for (String column : columns) {
                    int index = cursor.getColumnIndex(column);
                    String columnOutput = "#" + index + " -> [" + column + "] " + cursor.getString(index);
                    println(columnOutput);
                }

                cursor.close();
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    public void println(String data) {
        textView.append(data + "\n");
    }

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

        AutoPermissions.Companion.parsePermissions(this, requestCode, permissions, this);
    }

    @Override
    public void onDenied(int requestCode, String[] permissions) {
        Toast.makeText(this, "permissions denied : " + permissions.length, Toast.LENGTH_LONG).show();
    }

    @Override
    public void onGranted(int requestCode, String[] permissions) {
        Toast.makeText(this, "permissions granted : " + permissions.length, Toast.LENGTH_LONG).show();
    }
}

* 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:orientation="vertical"
    tools:context=".MainActivity" >

    <Button
        android:id="@+id/button"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="연락처 가져오기" />

    <ScrollView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:background="#FFE57F">

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

            <TextView
                android:id="@+id/textView"
                android:layout_width="match_parent"
                android:layout_height="wrap_content" />
        </LinearLayout>
        
    </ScrollView>
    
</LinearLayout>

* AndroidManifest.xml

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

* Gradle

allprojects {
    repositories {
        maven { url 'https://jitpack.io' }
    }
}

dependencies {
    implementation 'com.github.pedroSG94:AutoPermissions:1.0.3'
}