Are you trying to store the image itself in your database or the path to the image? If you are trying to store the image itself in the database, I recommend using base64_encode and base64_decode to encode/code your image. You should also access your image file using the file method, not the input method, like this:

$pic = $request->file('pic');

The image should be stored in the database not the path. I tried it with base64 encode / decode but it didnt work. The base64_encode / serialize method works but not the base64_decode / unserialize. Is binary the same than blob?

Migrations

 public function up()
    {
           Schema::create('entriesdistance', function (Blueprint $table) {
            $table->increments('id');
            $table->integer('kunde_id');
			$table->double('distanz');
            $table->dateTime('datum');
			$table->double('kalorien');
			$table->string('dauer');
			$table->double('geschwindigkeit');
		    $table->integer('locationpoint_id');
			$table->binary('pic');                     
			$table->rememberToken();
            $table->timestamps();
        });
    }

Receive controller

  public function store(Request $request)
    {
        $kundenid = $request->input('idkunde');
		$distanz = $request->input('distanz');
		$datum = $request->input('datum');
		$kalorien = $request->input('kalorien');
		$dauer = $request->input('dauer');
		$geschwindigkeit = $request->input('geschwindigkeit');
		$locationpoint_id = $request->input('idlocation');
		$pic = $request->input('pic');      <<<<< "pic" is a bitmap converts to byte[]  
			
		$entryDistance = new Entry_distance;
		$entryDistance->kunde_id = $kundenid;
		$entryDistance->distanz = $distanz;
		$entryDistance->datum = $datum;
		$entryDistance->kalorien  = $kalorien;
		$entryDistance->dauer  = $dauer;
		$entryDistance->geschwindigkeit  = $geschwindigkeit;
		$entryDistance->locationpoint_id  = $locationpoint_id;
		$entryDistance->pic  = base64_encode(serialize($pic));
		$entryDistance->save();
		
	$test = 'entryDistance gespeichert';
		return response()->json($test);
}

Send controller

  public function show($id)
    {
         
	
	  $results = DB::select('SELECT * FROM entriesdistance WHERE entriesdistance.kunde_id = ?', [$id]); 
	
		$test = unserialize(base64_decode($results[0]->pic));
	

		    return response()->json(test);    
    }

Output: nothing

Send controller

  public function show($id)
    {
         
	  $results = DB::select('SELECT * FROM entriesdistance WHERE entriesdistance.kunde_id = ?', [$id]); 
	
		    return response()->json($results[0]->pic); 

     }

Output: YToxOTA3NTg6e2k6MDtpOi0xM.........

Laravel's binary method creates a BLOB column. But anyway, here's how you can do it.

First, like I said in the previous post, you should access your image file using the file method, not the input method.

$pic = $request->file('pic');

Next, you need to get the contents of that file.

$picContent = file_get_contents($pic);

Note: You can also use the File facade, but anyway, that's not important. Lets move on.

When you store it, you can then use base64_encode. The serialize method is not necessary.

$entryDistance->pic  = base64_encode($picContent);

When you retrieve it, you can use base64_decode, and not unserialize.

$test = base64_decode($results[0]->pic);

Thanks for your help. I tried it but it doesnt work. Here is my code:

Receive controller

 public function store(Request $request)
    {
    	
		$picContent = file_get_contents($request);
        $kundenid = $request->input('idkunde');
		$distanz = $request->input('distanz');
		$datum = $request->input('datum');
		$kalorien = $request->input('kalorien');
		$dauer = $request->input('dauer');
		$geschwindigkeit = $request->input('geschwindigkeit');
		$locationpoint_id = $request->input('idlocation');
		$pic = $request->input('pic');
			
		$entryDistance = new Entry_distance;
		$entryDistance->kunde_id = $kundenid;
		$entryDistance->distanz = $distanz;
		$entryDistance->datum = $datum;
		$entryDistance->kalorien  = $kalorien;
		$entryDistance->dauer  = $dauer;
		$entryDistance->geschwindigkeit  = $geschwindigkeit;
		$entryDistance->locationpoint_id  = $locationpoint_id;
		$picContent = file_get_contents($pic);
		$entryDistance->pic  = base64_encode($picContent);
		$entryDistance->save();
		
	$test = 'entryDistance gespeichert';
		return response()->json($test);
    }

My client (Andorid App) gets no answer with these code changes.

Here are more information. I hope it could help :)

Object that the client will send to the server

public class EintraegeDistanz {

    private long ideintraegedistanz;
    private long idkunde;
    private double distanz;
    private String datum;
    private double kalorien;
    private String dauer;
    private double geschwindigkeit;
    private int idlocation;
    private byte[] pic;


    public EintraegeDistanz(long ideintraegedistanz, long idkunde, double distanz, String datum, double kalorien, String dauer, double geschwindigkeit, int idlocation, byte[] pic){
        this.ideintraegedistanz=ideintraegedistanz;
        this.idkunde=idkunde;
        this.distanz=distanz;
        this.datum=datum;
        this.kalorien=kalorien;
        this.dauer=dauer;
        this.geschwindigkeit=geschwindigkeit;
        this.idlocation=idlocation;
        this.pic=pic;
    }
.
.
.
.

The json object from the client (Android App) send via POST looks like the following:

{"datum":"08 Okt. 2015 13:08:17","dauer":"00:00:02","pic":[-119,80,78,71,13,10,26,10,0,0,0,13,73,72,68,82,0,0.....]....}

I hope this is not confusing....

I don't know much about Android so I can't help you there, but change this line:

// Old line
$pic = $request->input('pic');
// New line
$pic = $request->file('pic');