Android Studio Phone Call

Syntax

To make a phone call from Android Studio, you need to perform the following steps:

• Check for permission: Add the CALL_PHONE permission in the AndroidManifest.xml file.

• Create an EditText and a Button element in the layout XML file.

• Set an onClick listener on the Button element.

• In the onClick method, retrieve the phone number from the EditText element and create a Uri object with the tel scheme.

• Create an Intent object with ACTION_CALL action and the Uri object as data.

• Start the activity with the startActivity() method.

if (ActivityCompat.checkSelfPermission(this, Manifest.permission.CALL_PHONE) == PackageManager.PERMISSION_GRANTED) {
    String phoneNumber = phoneNumberEditText.getText().toString().trim();
    if (!TextUtils.isEmpty(phoneNumber)) {
        Uri dialUri = Uri.parse("tel:" + phoneNumber);
        Intent callIntent = new Intent(Intent.ACTION_CALL, dialUri);
        startActivity(callIntent);
    }
} else {
    ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.CALL_PHONE}, MY_PERMISSIONS_REQUEST_CALL_PHONE);
}

Example

Suppose you have an app where the user can enter a phone number and click a button to make a phone call. Here is an example of how to implement this feature in Android Studio.

Layout XML File

<EditText
    android:id="@+id/phoneNumberEditText"
    android:layout_width="match_parent"
    android:layout_height="wrap_content" />

<Button
    android:id="@+id/callButton"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="Call" />

Activity Java File

private static final int MY_PERMISSIONS_REQUEST_CALL_PHONE = 1;

private EditText phoneNumberEditText;
private Button callButton;

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

    phoneNumberEditText = findViewById(R.id.phoneNumberEditText);
    callButton = findViewById(R.id.callButton);
    callButton.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            makePhoneCall();
        }
    });
}

private void makePhoneCall() {
    if (ActivityCompat.checkSelfPermission(this, Manifest.permission.CALL_PHONE) == PackageManager.PERMISSION_GRANTED) {
        String phoneNumber = phoneNumberEditText.getText().toString().trim();
        if (!TextUtils.isEmpty(phoneNumber)) {
            Uri dialUri = Uri.parse("tel:" + phoneNumber);
            Intent callIntent = new Intent(Intent.ACTION_CALL, dialUri);
            startActivity(callIntent);
        }
    } else {
        ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.CALL_PHONE}, MY_PERMISSIONS_REQUEST_CALL_PHONE);
    }
}

@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
    if (requestCode == MY_PERMISSIONS_REQUEST_CALL_PHONE) {
        if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
            makePhoneCall();
        } else {
            Toast.makeText(this, "Call permission was not granted", Toast.LENGTH_SHORT).show();
        }
    }
}

Output

When the user enters a phone number and clicks the "Call" button, the phone app will be opened and begin dialing the number.

Explanation

To make a phone call from Android Studio, you need to add the CALL_PHONE permission in the AndroidManifest.xml file, create an EditText and a Button element in the layout XML file, set an onClick listener on the Button element, retrieve the phone number from the EditText element and create a Uri object with the tel scheme, create an Intent object with ACTION_CALL action and the Uri object as data, and start the activity with the startActivity() method.

To handle the case where the user has not granted the CALL_PHONE permission, you need to check for the permission using checkSelfPermission(), and if it is not granted, request the permission using requestPermissions(). You also need to override the onRequestPermissionsResult() method to handle the result of the permission request.

Use

The Android Studio Phone Call feature can be used in any app where the user needs to make a phone call.

Important Points

• The CALL_PHONE permission is a dangerous permission, so you need to ask for it at runtime on devices running Android 6.0 (API level 23) and higher.

• Before making a phone call, you should check if the CALL_PHONE permission is granted. If it is not granted, you should request it.

• The ACTION_CALL intent is used to start the default phone app and begin dialing a phone number.

Summary

In this guide, we learned how to make a phone call from Android Studio by adding the CALL_PHONE permission in the AndroidManifest.xml file, creating an EditText and a Button element in the layout XML file, setting an onClick listener on the Button element, retrieving the phone number from the EditText element and creating a Uri object with the tel scheme, creating an Intent object with ACTION_CALL action and the Uri object as data, and starting the activity with the startActivity() method. We also learned how to handle the case where the user has not granted the CALL_PHONE permission, and important points to keep in mind when implementing the Android Studio Phone Call feature.