From 1e5239921abe62ecdcb2207d041c204d6c8c8bc2 Mon Sep 17 00:00:00 2001
From: Felix Atsma <felixatsma@gmail.com>
Date: Tue, 20 Jun 2017 21:20:54 +0200
Subject: [PATCH] Camera preview working, with non working picture button

---
 .../app/src/main/AndroidManifest.xml          |  2 +
 .../tagram/CameraFragment.java                | 35 +++++++++-
 .../myhyvesbookplus/tagram/CameraPreview.java | 68 +++++++++++++++++++
 .../src/main/res/layout/fragment_camera.xml   | 40 ++++++++---
 4 files changed, 133 insertions(+), 12 deletions(-)
 create mode 100644 app/MyHyvesBookPlusStagram/app/src/main/java/nl/myhyvesbookplus/tagram/CameraPreview.java

diff --git a/app/MyHyvesBookPlusStagram/app/src/main/AndroidManifest.xml b/app/MyHyvesBookPlusStagram/app/src/main/AndroidManifest.xml
index 86ae044..dff6028 100644
--- a/app/MyHyvesBookPlusStagram/app/src/main/AndroidManifest.xml
+++ b/app/MyHyvesBookPlusStagram/app/src/main/AndroidManifest.xml
@@ -2,6 +2,8 @@
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
     package="nl.myhyvesbookplus.tagram">
 
+    <uses-permission android:name="android.permission.CAMERA" />
+
     <application
         android:allowBackup="true"
         android:icon="@mipmap/ic_launcher"
diff --git a/app/MyHyvesBookPlusStagram/app/src/main/java/nl/myhyvesbookplus/tagram/CameraFragment.java b/app/MyHyvesBookPlusStagram/app/src/main/java/nl/myhyvesbookplus/tagram/CameraFragment.java
index 64bec8e..7317e34 100644
--- a/app/MyHyvesBookPlusStagram/app/src/main/java/nl/myhyvesbookplus/tagram/CameraFragment.java
+++ b/app/MyHyvesBookPlusStagram/app/src/main/java/nl/myhyvesbookplus/tagram/CameraFragment.java
@@ -1,13 +1,15 @@
 package nl.myhyvesbookplus.tagram;
 
 import android.content.Context;
+import android.hardware.Camera;
 import android.net.Uri;
 import android.os.Bundle;
 import android.app.Fragment;
+import android.support.v7.app.AppCompatActivity;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
-
+import android.widget.RelativeLayout;
 
 /**
  * A simple {@link Fragment} subclass.
@@ -29,6 +31,9 @@ public class CameraFragment extends Fragment {
 
     private OnFragmentInteractionListener mListener;
 
+    private Camera mCamera;
+    private CameraPreview mPreview;
+
     public CameraFragment() {
         // Required empty public constructor
     }
@@ -58,13 +63,28 @@ public class CameraFragment extends Fragment {
             mParam1 = getArguments().getString(ARG_PARAM1);
             mParam2 = getArguments().getString(ARG_PARAM2);
         }
+
+        // Hide top bar
+        // ((AppCompatActivity) getActivity()).getSupportActionBar().hide();
     }
 
     @Override
     public View onCreateView(LayoutInflater inflater, ViewGroup container,
                              Bundle savedInstanceState) {
         // Inflate the layout for this fragment
-        return inflater.inflate(R.layout.fragment_camera, container, false);
+        View view = inflater.inflate(R.layout.fragment_camera, container, false);
+
+        mCamera = getCameraInstance();
+        mPreview = new CameraPreview(getActivity().getBaseContext(), mCamera);
+        RelativeLayout preview = (RelativeLayout) view.findViewById(R.id.camera_preview);
+
+        preview.addView(mPreview);
+
+        // Draw picture and switch button over preview
+        view.findViewById(R.id.picture_button).bringToFront();
+        view.findViewById(R.id.switch_camera_button).bringToFront();
+
+        return view;
     }
 
     // TODO: Rename method, update argument and hook method into UI event
@@ -91,6 +111,17 @@ public class CameraFragment extends Fragment {
         mListener = null;
     }
 
+    public static Camera getCameraInstance(){
+        Camera c = null;
+        try {
+            c = Camera.open(0);
+        } catch (Exception e) {
+            e.getStackTrace();
+        }
+        return c;
+    }
+
+
     /**
      * This interface must be implemented by activities that contain this
      * fragment to allow an interaction in this fragment to be communicated
diff --git a/app/MyHyvesBookPlusStagram/app/src/main/java/nl/myhyvesbookplus/tagram/CameraPreview.java b/app/MyHyvesBookPlusStagram/app/src/main/java/nl/myhyvesbookplus/tagram/CameraPreview.java
new file mode 100644
index 0000000..cd24cea
--- /dev/null
+++ b/app/MyHyvesBookPlusStagram/app/src/main/java/nl/myhyvesbookplus/tagram/CameraPreview.java
@@ -0,0 +1,68 @@
+package nl.myhyvesbookplus.tagram;
+
+import android.content.Context;
+import android.hardware.Camera;
+import android.util.Log;
+import android.view.SurfaceHolder;
+import android.view.SurfaceView;
+
+import java.io.IOException;
+
+public class CameraPreview extends SurfaceView implements SurfaceHolder.Callback {
+    SurfaceHolder mHolder;
+    Camera mCamera;
+
+    public CameraPreview(Context context, Camera camera) {
+        super(context);
+        mCamera = camera;
+        mCamera.setDisplayOrientation(90);
+
+        mHolder = getHolder();
+        mHolder.addCallback(this);
+    }
+
+    @Override
+    public void surfaceCreated(SurfaceHolder mHolder) {
+        Log.d("camera", "ding");
+
+        try {
+            mCamera.setPreviewDisplay(mHolder);
+            mCamera.startPreview();
+        } catch (IOException e) {
+            e.getStackTrace();
+        }
+    }
+
+    @Override
+    public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
+        if (mHolder.getSurface() == null){
+            // preview surface does not exist
+            return;
+        }
+
+        // stop preview before making changes
+        try {
+            mCamera.stopPreview();
+        } catch (Exception e){
+            // ignore: tried to stop a non-existent preview
+        }
+
+        // set preview size and make any resize, rotate or
+        // reformatting changes here
+
+        // start preview with new settings
+        try {
+            mCamera.setPreviewDisplay(mHolder);
+            mCamera.startPreview();
+
+        } catch (Exception e){
+            Log.d("camera", "Error starting camera preview: " + e.getMessage());
+        }
+    }
+
+    @Override
+    public void surfaceDestroyed(SurfaceHolder holder) {
+        mCamera.stopPreview();
+        mCamera.release();
+    }
+}
diff --git a/app/MyHyvesBookPlusStagram/app/src/main/res/layout/fragment_camera.xml b/app/MyHyvesBookPlusStagram/app/src/main/res/layout/fragment_camera.xml
index 49fd204..9e5bf0c 100644
--- a/app/MyHyvesBookPlusStagram/app/src/main/res/layout/fragment_camera.xml
+++ b/app/MyHyvesBookPlusStagram/app/src/main/res/layout/fragment_camera.xml
@@ -1,4 +1,5 @@
 <FrameLayout 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"
@@ -9,17 +10,36 @@
         android:layout_height="match_parent"
         android:orientation="vertical">
 
-        <TextView
-            android:layout_width="match_parent"
-            android:layout_height="wrap_content"
-            android:text="@string/hello_camera" />
+        <RelativeLayout
+            android:id="@+id/camera_preview"
+            android:layout_width="fill_parent"
+            android:layout_height="fill_parent"
+            android:layout_weight="1">
+
+            <ImageButton
+                android:id="@+id/picture_button"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_alignParentBottom="true"
+                android:layout_centerHorizontal="true"
+                android:background="@android:color/transparent"
+                android:layout_margin="10dp"
+                android:padding="10dp"
+                android:scaleX="2"
+                android:scaleY="2"
+                app:srcCompat="@android:drawable/ic_menu_camera" />
+
+            <ImageButton
+                android:id="@+id/switch_camera_button"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_alignParentRight="true"
+                android:layout_margin="9dp"
+                android:background="@android:color/transparent"
+                app:srcCompat="@android:drawable/ic_menu_revert" />
+
+        </RelativeLayout>
 
-        <Button
-            android:layout_width="match_parent"
-            android:layout_height="wrap_content"
-            android:onClick="logOutOnClick"
-            android:text="LogOut" />
     </LinearLayout>
-    <!-- TODO: Update blank fragment layout -->
 
 </FrameLayout>