3-2-1 인텐트

MainActivity

package com.example.boostcoursepractice;
 
import androidx.annotation.Nullable;
import androidx.appcompat.app.AlertDialog;
import androidx.appcompat.app.AppCompatActivity;
 
import android.content.ComponentName;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.BaseAdapter;
import android.widget.Button;
import android.widget.EditText;
import android.widget.FrameLayout;
import android.widget.GridView;
import android.widget.ImageView;
import android.widget.Spinner;
import android.widget.TextView;
import android.widget.Toast;
 
import com.google.android.material.snackbar.Snackbar;
 
import org.w3c.dom.Text;
 
import java.util.ArrayList;
 
public class MainActivity extends AppCompatActivity {
 
    EditText editText;
 
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
 
        Button button = (Button) findViewById(R.id.button3);
        editText = (EditText) findViewById(R.id.editText);
 
        button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                String receiver = editText.getText().toString();
                Intent intent = new Intent(Intent.ACTION_DIAL, Uri.parse("tel:"+receiver));
                startActivity(intent);
 
                Intent intent2 = new Intent();
                ComponentName componentName = new ComponentName("com.example.boostcoursepractice", "com.example.boostcoursepractice.MenuActivity");
                intent2.setComponent(componentName);
                startActivity(intent2);
 
                
            }
        });
 
    }
}
 

 

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    >
 
    <Button
        android:id="@+id/button3"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentStart="true"
        android:layout_alignParentLeft="true"
        android:layout_alignParentTop="true"
        android:layout_marginStart="154dp"
        android:layout_marginLeft="154dp"
        android:layout_marginTop="322dp"
        android:text="전화걸기" />
 
    <EditText
        android:id="@+id/editText"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentStart="true"
        android:layout_alignParentLeft="true"
        android:layout_alignParentTop="true"
        android:layout_marginStart="85dp"
        android:layout_marginLeft="85dp"
        android:layout_marginTop="237dp"
        android:ems="10"
        android:inputType="textPersonName"
        android:text="010-1000-1000" />
</RelativeLayout>

 

 String receiver = editText.getText().toString();

                Intent intent = new Intent(Intent.ACTION_DIAL, Uri.parse("tel:"+receiver));

                startActivity(intent);

 

이런식으로 인텐트를 통해 전화기능을 가진 앱을 불러들여 전화번호를 넘겨줄수 있다.

 

 

 

만약 MenuActivity가 있다면 아래와 같이

 

Intent intent2 = new Intent();

                ComponentName componentName = new ComponentName("com.example.boostcoursepractice", "com.example.boostcoursepractice.MenuActivity");

                intent2.setComponent(componentName);

                startActivity(intent2);

 

 

ComponentName을 이용하여 패키지와 패키지를 포함한 액티비티이름을 String으로 매개인자로 넘겨주어 인텐트에 set해주고 start해주면 해당 액티비티를 띄울 수 있다.(이러한 방식으로 하면 String으로 액티비티를 띄울 수 있다는 장점이 있다.)

 

 

결과화면