Added camera function in the app

CalorieEstimator/app/src/main/java/com/example/calorieestimator/take_picture.java

 package com.example.calorieestimator;
 
+import android.content.Intent;
+import android.graphics.Bitmap;
 import android.os.Bundle;
 
 import com.google.android.material.floatingactionbutton.FloatingActionButton;
@@ -8,25 +10,59 @@ import com.google.android.material.snackbar.Snackbar;
 import androidx.appcompat.app.AppCompatActivity;
 import androidx.appcompat.widget.Toolbar;
 
+import android.provider.MediaStore;
 import android.view.View;
+import android.widget.Button;
+import android.widget.ImageView;
 
 public class take_picture extends AppCompatActivity {
 
+    //Button _btn_cam;
+    private ImageView _imageView;
+    private static final int REQUEST_IMAGE_CAPTURE = 101;
+
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_take_picture);
-        Toolbar toolbar = findViewById(R.id.toolbar);
-        setSupportActionBar(toolbar);
+        _imageView = findViewById(R.id.imageView);
+        //_btn_cam = (Button)findViewById(R.id.btn_cam);
+
+
+            //Intent imageTakeIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
+            //if (imageTakeIntent.resolveActivity(getPackageManager())!=null){
+            //    startActivityForResult(imageTakeIntent, REQUEST_IMAGE_CAPTURE);
 
-        FloatingActionButton fab = findViewById(R.id.fab);
-        fab.setOnClickListener(new View.OnClickListener() {
+
+
+        /*_btnregister.setOnClickListener(new View.OnClickListener(){
             @Override
-            public void onClick(View view) {
-                Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG)
-                        .setAction("Action", null).show();
+            public void onClick(View v){
+                db = openHelper.getWritableDatabase();
+                String fname = _fname.getText().toString();
+                String lname = _lname.getText().toString();
+                String email = _user_email.getText().toString();
+                String pswd = _user_pswd.getText().toString();
+                insertdata(fname, lname, email, pswd);
+                Toast.makeText(getApplicationContext(), "register successfully", Toast.LENGTH_LONG).show();
+
             }
-        });
+
+        });*/
+    }
+
+    public void btn_cam(View view) {
+        Intent imageTakeIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
+        if (imageTakeIntent.resolveActivity(getPackageManager()) != null) {
+            startActivityForResult(imageTakeIntent, REQUEST_IMAGE_CAPTURE);
+        }
     }
 
+
+    @Override
+    protected void onActivityResult(int requestCode, int resultCode, Intent data){
+        Bundle extras = data.getExtras();
+        Bitmap imageBitmap = (Bitmap) extras.get("data");
+        _imageView.setImageBitmap(imageBitmap);
+    }
 }

CalorieEstimator/app/src/main/res/layout/activity_main.xml

@@ -79,6 +79,7 @@
         android:layout_width="121dp"
         android:layout_height="40dp"
         android:layout_marginStart="70dp"
+        android:layout_marginTop="42dp"
         android:layout_marginEnd="32dp"
         android:layout_marginBottom="90dp"
         android:text="Login"
@@ -96,7 +97,7 @@
         android:layout_marginStart="16dp"
         android:layout_marginTop="42dp"
         android:layout_marginEnd="70dp"
-        android:layout_marginBottom="127dp"
+        android:layout_marginBottom="90dp"
         android:text="Skip"
         app:layout_constraintBottom_toBottomOf="parent"
         app:layout_constraintEnd_toEndOf="parent"

CalorieEstimator/app/src/main/res/layout/activity_take_picture.xml

 <?xml version="1.0" encoding="utf-8"?>
-<androidx.coordinatorlayout.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
+<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:id="@+id/coordinatorLayout"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
     tools:context=".take_picture">
 
-    <com.google.android.material.appbar.AppBarLayout
-        android:layout_width="match_parent"
-        android:layout_height="wrap_content"
-        android:theme="@style/AppTheme.AppBarOverlay">
+    <Button
+        android:id="@+id/btn_cam"
+        android:layout_width="126dp"
+        android:layout_height="55dp"
+        android:layout_marginStart="142dp"
+        android:layout_marginTop="550dp"
+        android:layout_marginEnd="143dp"
+        android:layout_marginBottom="126dp"
+        android:onClick="btn_cam"
+        android:text="Open Camera"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent"
+        app:layout_constraintVertical_bias="0.0" />
 
-        <androidx.appcompat.widget.Toolbar
-            android:id="@+id/toolbar"
-            android:layout_width="match_parent"
-            android:layout_height="?attr/actionBarSize"
-            android:background="?attr/colorPrimary"
-            app:popupTheme="@style/AppTheme.PopupOverlay" />
-
-    </com.google.android.material.appbar.AppBarLayout>
-
-    <include layout="@layout/content_take_picture" />
-
-    <com.google.android.material.floatingactionbutton.FloatingActionButton
-        android:id="@+id/fab"
-        android:layout_width="wrap_content"
-        android:layout_height="wrap_content"
+    <ImageView
+        android:id="@+id/imageView"
+        android:layout_width="250dp"
+        android:layout_height="250dp"
+        android:layout_marginStart="80dp"
+        android:layout_marginTop="187dp"
+        android:layout_marginEnd="81dp"
+        android:layout_marginBottom="113dp"
+        app:layout_constraintBottom_toTopOf="@+id/btn_cam"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent"
+        app:srcCompat="@mipmap/ic_launcher" />
+</androidx.constraintlayout.widget.ConstraintLayout>
\ No newline at end of file
-        android:layout_gravity="bottom|end"
-        android:layout_margin="@dimen/fab_margin"
-        app:srcCompat="@android:drawable/ic_dialog_email" />
-
-</androidx.coordinatorlayout.widget.CoordinatorLayout>
\ No newline at end of file