Add MainActivity.java

MainActivity.java

@@ -0,0 +1,66 @@
+package com.fikyb.myapplication;
+
+import androidx.annotation.NonNull;
+import androidx.appcompat.app.AppCompatActivity;
+import androidx.core.app.ActivityCompat;
+import androidx.core.content.ContextCompat;
+
+import android.content.pm.PackageManager;
+import android.os.Bundle;
+import android.view.View;
+import android.widget.Button;
+import android.widget.EditText;
+import android.widget.Toast;
+import android.telephony.SmsManager;
+
+import android.Manifest;
+
+public class MainActivity extends AppCompatActivity {
+
+    private EditText noHP;
+    private EditText txtMsg;
+    private Button btnSms;
+    String nomorHp;
+    String txtMessage;
+    private int[] grantResults;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_main);
+
+        noHP = (EditText) findViewById(R.id.nomorHp);
+        txtMsg = (EditText) findViewById(R.id.pesanSms);
+        btnSms = (Button) findViewById(R.id.btnSubmit);
+
+        btnSms.setOnClickListener(new View.OnClickListener() {
+            public void onClick(View v) {
+                if (ContextCompat.checkSelfPermission(MainActivity.this, Manifest.permission.SEND_SMS)
+                        == PackageManager.PERMISSION_GRANTED) {
+                    sendSMSMessage();
+                } else {
+                    ActivityCompat.requestPermissions(MainActivity.this, new String[]{Manifest.permission.SEND_SMS}, 100);
+                }
+            }
+        });
+    }
+    @Override
+    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
+        super.onRequestPermissionsResult(requestCode,permissions, grantResults);
+        if(requestCode == 100 && grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED){
+            sendSMSMessage();
+        }
+        else{
+            Toast.makeText(MainActivity.this, "SMS GAGAL DIKIRIM", Toast.LENGTH_SHORT).show();
+        }
+    }
+    protected void sendSMSMessage() {
+        nomorHp = noHP.getText().toString();
+        txtMessage = txtMsg.getText().toString();
+        if (nomorHp.isEmpty() && !txtMessage.isEmpty()) {
+            SmsManager smsManager = SmsManager.getDefault();
+            smsManager.sendTextMessage(nomorHp, null, txtMessage, null, null);
+            Toast.makeText(MainActivity.this, "SMS Berhasil", Toast.LENGTH_SHORT).show();
+            }
+        }
+    }