How To Make Flashlight Application in Android Studio
hello developer, today I will tell you how to create flashlight application in android studio. every smartphone has a flashlight feature using the camera flash. I am going to share my source code how to make a won flashlight application using android studio.
XML (activity_main.xml)
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<android.support.constraint.ConstraintLayout 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" tools:context=".Light"> <Button android:id="@+id/btnFlashLightToggle" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="FLASHLIGHT OFF" app:layout_constraintBottom_toBottomOf="parent" app:layout_constraintLeft_toLeftOf="parent" app:layout_constraintRight_toRightOf="parent" app:layout_constraintTop_toTopOf="parent" /> </android.support.constraint.ConstraintLayout> |
JAVA (MainActivity.java)
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import android.Manifest; import android.content.Context; import android.content.pm.PackageManager; import android.hardware.camera2.CameraAccessException; import android.hardware.camera2.CameraManager; import android.support.annotation.NonNull; import android.support.v4.app.ActivityCompat; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.view.View; import android.widget.Button; import android.widget.Toast; public class Light extends AppCompatActivity { Button btnFlashLight; private static final int CAMERA_REQUEST = 123; boolean hasCameraFlash = false; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_light); ActivityCompat.requestPermissions(Light.this, new String[]{Manifest.permission.CAMERA}, CAMERA_REQUEST); hasCameraFlash = getPackageManager(). hasSystemFeature(PackageManager.FEATURE_CAMERA_FLASH); btnFlashLight = findViewById(R.id.btnFlashLightToggle); btnFlashLight.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { if (hasCameraFlash) { if (btnFlashLight.getText().toString().contains("ON")) { btnFlashLight.setText("FLASHLIGHT OFF"); flashLightOff(); } else { btnFlashLight.setText("FLASHLIGHT ON"); flashLightOn(); } } else { android.widget.Toast.makeText(Light.this, "No flash available on your device", android.widget.Toast.LENGTH_SHORT).show(); } } }); } private void flashLightOn() { CameraManager cameraManager = (CameraManager) getSystemService(Context.CAMERA_SERVICE); try { String cameraId = cameraManager.getCameraIdList()[0]; cameraManager.setTorchMode(cameraId, true); } catch (CameraAccessException e) { } } private void flashLightOff() { CameraManager cameraManager = (CameraManager) getSystemService(Context.CAMERA_SERVICE); try { String cameraId = cameraManager.getCameraIdList()[0]; cameraManager.setTorchMode(cameraId, false); } catch (CameraAccessException e) { } } @Override public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) { switch (requestCode) { case CAMERA_REQUEST: if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) { hasCameraFlash = getPackageManager(). hasSystemFeature(PackageManager.FEATURE_CAMERA_FLASH); } else { btnFlashLight.setEnabled(false); android.widget.Toast.makeText(Light.this, "Permission Denied for the Camera", Toast.LENGTH_SHORT).show(); } break; } } } |
