- Own camera preview added

- Removed openCV libs
- Issues: Take more than one picture fails
- TODO: Saving the picture not needed, just send it to the server

.idea/misc.xml

       </value>
     </option>
   </component>
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_8" project-jdk-name="1.8" project-jdk-type="JavaSDK">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_7" project-jdk-name="1.8" project-jdk-type="JavaSDK">
     <output url="file://$PROJECT_DIR$/build/classes" />
   </component>
   <component name="ProjectType">

app/build.gradle

     implementation 'com.android.support:appcompat-v7:27.1.1'
     implementation 'com.android.support.constraint:constraint-layout:1.1.3'
     implementation 'com.android.support:design:27.1.1'
-    testImplementation 'junit:junit:4.12'
     androidTestImplementation 'com.android.support.test:runner:1.0.2'
     androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2'
-    implementation project(':openCVLibrary343')
 }

app/src/main/AndroidManifest.xml

 <?xml version="1.0" encoding="utf-8"?>
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
     package="project.schafkopfzaehler_2">
-    <uses-permission android:name="android.permission.CAMERA"/>
-    <uses-feature android:name="android.hardware.camera" android:required="false"/>
-    <uses-feature android:name="android.hardware.camera.autofocus" android:required="false"/>
-    <uses-feature android:name="android.hardware.camera.front" android:required="false"/>
-    <uses-feature android:name="android.hardware.camera.front.autofocus" android:required="false"/>
+
+    <uses-permission android:name="android.permission.CAMERA" />
+
+    <uses-feature
+        android:name="android.hardware.camera"
+        android:required="true" />
+    <uses-feature
+        android:name="android.hardware.camera.autofocus"
+        android:required="true" />
+    <uses-feature
+        android:name="android.hardware.camera.front"
+        android:required="true" />
+    <uses-feature
+        android:name="android.hardware.camera.front.autofocus"
+        android:required="true" />
+
     <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
+
     <application
         android:allowBackup="true"
         android:icon="@mipmap/ic_launcher"
             android:name=".MainGameActivity"
             android:label="@string/title_activity_main_game"
             android:screenOrientation="portrait"
-            android:theme="@style/AppTheme.NoActionBar"
-            />
+            android:theme="@style/AppTheme.NoActionBar" />
         <activity
             android:name=".ChooseGame"
             android:label="@string/title_choose_game"
             android:screenOrientation="portrait"
-            android:theme="@style/AppTheme.NoActionBar"
-            />
+            android:theme="@style/AppTheme.NoActionBar" />
+        <activity
+            android:name=".CardCaptureActivity"
+            android:screenOrientation="portrait"
+            android:theme="@style/AppTheme.NoActionBar"/>
     </application>
 
 </manifest>

app/src/main/java/project/schafkopfzaehler_2/CardCaptureActivity.java

+package project.schafkopfzaehler_2;
+
+import android.hardware.Camera;
+import android.net.Uri;
+import android.os.Environment;
+import android.support.v7.app.AppCompatActivity;
+import android.os.Bundle;
+import android.util.Log;
+import android.view.View;
+import android.widget.Button;
+import android.widget.FrameLayout;
+import android.widget.TextView;
+
+import java.io.File;
+import java.io.FileNotFoundException;
+import java.io.FileOutputStream;
+import java.io.IOException;
+
+public class CardCaptureActivity extends AppCompatActivity {
+
+    private Camera mCamera;
+    private cameraPreview mPreview;
+    Button capture; // Button init
+    TextView captureLog; // TextView init
+    public static final int MEDIA_TYPE_IMAGE = 1;
+
+    // Add a listener to the Capture button
+    private View.OnClickListener startCaptureListener = new View.OnClickListener() {
+
+        @Override
+        public void onClick (View v) {
+            if (v == capture) {
+                mCamera.takePicture(null, null, mPicture);
+            }
+        }
+    };
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.cardcapture);
+
+        // Create an instance of Camera
+        mCamera = getCameraInstance();
+
+        // Create our Preview view and set it as the content of our activity.
+        mPreview = new cameraPreview(this, mCamera);
+        FrameLayout preview = findViewById(R.id.cameraPreview);
+        preview.addView(mPreview);
+
+        capture = findViewById(R.id.capture);
+        capture.setOnClickListener(startCaptureListener);
+
+    }
+
+    /* Get an instance of the Camera object. */
+    public static Camera getCameraInstance(){
+        Camera c = null;
+        try {
+            c = Camera.open(); // attempt to get a Camera instance
+        }
+        catch (Exception e){
+            // Camera is not available (in use or does not exist)
+        }
+        return c; // returns null if camera is unavailable
+    }
+
+
+    @Override
+    protected void onPause() {
+
+        super.onPause();
+        releaseCamera();
+    }
+
+    @Override
+    protected void onResume() {
+        super.onResume();
+    }
+
+    @Override
+    protected void onRestart() {
+        super.onRestart();
+    }
+
+    @Override
+    protected void onStart() {
+        super.onStart();
+    }
+
+    private Camera.PictureCallback mPicture = new Camera.PictureCallback() {
+
+        @Override
+        public void onPictureTaken(byte[] data, Camera camera) {
+
+            File pictureFile = getOutputMediaFile(MEDIA_TYPE_IMAGE);
+            if (pictureFile == null){
+                Log.d("CAMERA", "Error creating media file, check storage permissions");
+                return;
+            }
+
+            try {
+                FileOutputStream fos = new FileOutputStream(pictureFile);
+                fos.write(data);
+                fos.close();
+            } catch (FileNotFoundException e) {
+                Log.d("CAMERA", "File not found: " + e.getMessage());
+            } catch (IOException e) {
+                Log.d("CAMERA", "Error accessing file: " + e.getMessage());
+            }
+
+            captureLog = findViewById(R.id.capture_log);
+            captureLog.setText("Karte scannen --> an Server senden");
+
+        }
+    };
+
+    private void releaseCamera(){
+        if (mCamera != null){
+            mCamera.release();        // release the camera for other applications
+            mCamera = null;
+        }
+    }
+
+    /** Create a file Uri for saving an image or video */
+    private static Uri getOutputMediaFileUri(int type){
+        return Uri.fromFile(getOutputMediaFile(type));
+    }
+
+    /** Create a File for saving the captured image */
+    private static File getOutputMediaFile(int type){
+        // To be safe, you should check that the SDCard is mounted
+        // using Environment.getExternalStorageState() before doing this.
+
+        File mediaStorageDir = new File(Environment.getExternalStoragePublicDirectory(
+                Environment.DIRECTORY_PICTURES), "MyCameraApp");
+        // This location works best if you want the created images to be shared
+        // between applications and persist after your app has been uninstalled.
+
+        // Create the storage directory if it does not exist
+        if (! mediaStorageDir.exists()){
+            if (! mediaStorageDir.mkdirs()){
+                Log.d("MyCameraApp", "failed to create directory");
+                return null;
+            }
+        }
+
+        // Create a media file name
+        Long tsLong = System.currentTimeMillis()/1000;
+        String timeStamp = tsLong.toString();
+        File mediaFile;
+        if (type == MEDIA_TYPE_IMAGE){
+            mediaFile = new File(mediaStorageDir.getPath() + File.separator +
+                    "IMG_"+ timeStamp + ".jpg");
+        } else {
+            return null;
+        }
+
+        return mediaFile;
+    }
+
+}
+

app/src/main/java/project/schafkopfzaehler_2/MainGameActivity.java

 package project.schafkopfzaehler_2;
 
 import android.content.Intent;
+import android.hardware.camera2.CameraMetadata;
+import android.net.Uri;
 import android.os.Bundle;
 import android.provider.MediaStore;
 import android.support.design.widget.FloatingActionButton;
 import android.view.View;
 import android.widget.Button;
 import android.widget.TextView;
+import android.widget.VideoView;
 
 public class MainGameActivity extends AppCompatActivity {
 
     private Button p1, p2, p3, p4, chooseGame; // Button init
     private TextView choice;
     private String playerNames[] = {"", "", "", ""}; // Player names init
-    static final int REQUEST_VIDEO_CAPTURE = 1;
+    static final int REQUEST_IMAGE_CAPTURE = 1;
 
     private View.OnClickListener startClickListener = new View.OnClickListener() {
 
     private void playerButtonClicked (View v) {
 
         Log.d("MainGame", v + " clicked...");
-        Intent takeVideoIntent = new Intent(MediaStore.ACTION_VIDEO_CAPTURE);
-        if (takeVideoIntent.resolveActivity(getPackageManager()) != null) {
-            startActivityForResult(takeVideoIntent, REQUEST_VIDEO_CAPTURE);
-        }
-
-
+        // Start card capture activity with the camera preview
+        Intent cardCaptureIntent = new Intent(this, CardCaptureActivity.class);
+        startActivity(cardCaptureIntent);
     }
 
     private void gameChoosing () {
                 choice.setText(announcement);
             }
         }
-
-        if (requestCode == REQUEST_VIDEO_CAPTURE && resultCode == RESULT_OK) {
-            // Do nothing...
-        }
     }
 
 }

app/src/main/java/project/schafkopfzaehler_2/cameraPreview.java

+package project.schafkopfzaehler_2;
+
+import android.content.Context;
+import android.hardware.Camera;
+import android.util.Log;
+import android.view.SurfaceHolder;
+import android.view.SurfaceView;
+
+import java.io.IOException;
+
+/** A basic Camera preview class */
+public class cameraPreview extends SurfaceView implements SurfaceHolder.Callback {
+    private SurfaceHolder mHolder;
+    private Camera mCamera;
+
+    public cameraPreview(Context context, Camera camera) {
+        super(context);
+        mCamera = camera;
+
+        // Install a SurfaceHolder.Callback so we get notified when the
+        // underlying surface is created and destroyed.
+        mHolder = getHolder();
+        mHolder.addCallback(this);
+        // deprecated setting, but required on Android versions prior to 3.0
+        mHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
+    }
+
+    public void surfaceCreated(SurfaceHolder holder) {
+        // The Surface has been created, now tell the camera where to draw the preview.
+        try {
+            mCamera.setPreviewDisplay(holder);
+            mCamera.startPreview();
+        } catch (IOException e) {
+            Log.d("CAMERA", "Error setting camera preview: " + e.getMessage());
+        }
+    }
+
+    public void surfaceDestroyed(SurfaceHolder holder) {
+        // empty. Take care of releasing the Camera preview in your activity.
+    }
+
+    public void surfaceChanged(SurfaceHolder holder, int format, int w, int h) {
+        // If your preview can change or rotate, take care of those events here.
+        // Make sure to stop the preview before resizing or reformatting it.
+
+        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
+        }
+
+        mCamera.setDisplayOrientation(90);
+
+        // start preview with new settings
+        try {
+            mCamera.setPreviewDisplay(mHolder);
+            mCamera.startPreview();
+
+        } catch (Exception e){
+            Log.d("CAMERA", "Error starting camera preview: " + e.getMessage());
+        }
+    }
+}

app/src/main/res/layout/cardcapture.xml

 <?xml version="1.0" encoding="utf-8"?>
 <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
     android:layout_width="match_parent"
-    android:layout_height="match_parent"
-    android:background="@drawable/woodentable">
+    android:layout_height="match_parent">
 
     <FrameLayout
-        android:id="@+id/camera_preview"
+        android:id="@+id/cameraPreview"
         android:layout_width="match_parent"
-        android:layout_height="match_parent"
-        android:layout_above="@+id/button_capture"
-        android:layout_alignParentTop="true">
-
+        android:layout_height="match_parent">
     </FrameLayout>
 
-    <Button
-        android:id="@+id/button_capture"
-        style="?android:borderlessButtonStyle"
+    <RelativeLayout
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
-        android:layout_centerHorizontal="true"
-        android:background="@android:color/holo_green_dark"
-        android:fontFamily="@font/germania_one"
-        android:text="@string/announcement"
-        android:textColor="@android:color/black"
-        android:textSize="24sp" />
+        android:background="@drawable/woodentable"
+        android:layout_alignParentBottom="true">
 
-    <TextView
-        android:id="@+id/capture_log"
-        android:layout_width="match_parent"
-        android:layout_height="match_parent"
-        android:layout_alignParentBottom="true"
-        android:layout_below="@+id/button_capture"
-        android:text="TextView" />
+        <Button
+            android:id="@+id/capture"
+            style="?android:borderlessButtonStyle"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_alignParentBottom="true"
+            android:layout_centerHorizontal="true"
+            android:background="@android:color/holo_green_dark"
+            android:fontFamily="@font/germania_one"
+            android:text="@string/capture"
+            android:textColor="@android:color/black"
+            android:textSize="24sp" />
+
+        <TextView
+            android:id="@+id/capture_log"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:text="@string/app_name"
+            android:layout_alignParentBottom="false"
+            android:layout_below="@+id/capture" />
+
+    </RelativeLayout>
 
 </RelativeLayout>

app/src/main/res/layout/main_game_layout.xml

             android:layout_height="wrap_content"
             android:fontFamily="@font/germania_one"
             android:gravity="fill_horizontal"
-            android:paddingStart="10dp"
             android:paddingTop="10dp"
             android:text="@string/announcementMade"
             android:textAlignment="center"

app/src/main/res/values/strings.xml

     <string name="soloCall">Was war die Trumpffarbe?</string>
     <string name="title_activity_main_game">ActivityMainGame</string>
     <string name="title_choose_game">ChooseGame</string>
+    <string name="capture">Karte scannen</string>
     <string name="announcement">Neue Ansage</string>
     <string name="announcementMade">Angesagt\:</string>
     <string name="noChoice">Es wurde noch nichts angesagt...</string>