Request the camera feature
<manifest ... >
<uses-permission android:name="android.permission.CAMERA"/>
...
</manifest>
Take a photo with a camera app
public class MainActivity extends AppCompatActivity {
public static final int CAMERA_PERM_CODE = 101;
public static final int CAMERA_REQUEST_CODE = 102;
ImageView selectedImage;
Button cameraBtn;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
selectedImage = findViewById(R.id.displayImageView);
cameraBtn = findViewById(R.id.cameraBtn);
// Open Camera
cameraBtn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
askCameraPermissions();
}
});
}
private void askCameraPermissions() {
if(ContextCompat.checkSelfPermission(this, Manifest.permission.CAMERA) != PackageManager.PERMISSION_GRANTED){
ActivityCompat.requestPermissions(this,new String[] {Manifest.permission.CAMERA}, CAMERA_PERM_CODE);
}else {
openCamera();
}
}
@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
if(requestCode == CAMERA_PERM_CODE){
if(grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED){
openCamera();
}else {
Toast.makeText(this, "Camera Permission is Required to Use camera.", Toast.LENGTH_SHORT).show();
}
}
}
private void openCamera() {
Intent camera = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
startActivityForResult(camera, CAMERA_REQUEST_CODE);
}
@Override
protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if(requestCode == CAMERA_REQUEST_CODE){
Bitmap image = (Bitmap) data.getExtras().get("data");
selectedImage.setImageBitmap(image);
}
}
}
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.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=".MainActivity">
<TextView
android:id="@+id/textView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Hello World!"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<ImageView
android:id="@+id/displayImageView"
android:layout_width="300dp"
android:layout_height="300dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.495"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.199"
app:srcCompat="@drawable/ic_launcher_background" />
<Button
android:id="@+id/cameraBtn"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="47dp"
android:text="Camera"
android:textAllCaps="false"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.5"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/displayImageView" />
</androidx.constraintlayout.widget.ConstraintLayout>
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