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<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"

    tools:context=".MainActivity" >

    <Button

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:text="New Button"

        android:id="@+id/button"

        android:layout_alignParentBottom="true"

        android:layout_alignParentLeft="true"

        android:layout_alignParentStart="true"

        android:layout_alignParentRight="true"

        android:layout_alignParentEnd="true" />

    <ImageView

        android:layout_width="match_parent"

        android:layout_height="match_parent"

        android:id="@+id/imageView"

        android:layout_above="@+id/button"

        android:layout_alignParentLeft="true"

        android:layout_alignParentStart="true"

        android:layout_marginBottom="108dp" />

</RelativeLayout>

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package com.umiitkose.myapplication;

        import android.bluetooth.BluetoothAdapter;

        import android.content.Context;

        import android.content.Intent;

        import android.graphics.Bitmap;

        import android.media.MediaRecorder;

        import android.net.Uri;

        import android.net.wifi.WifiManager;

        import android.os.Bundle;

        import android.app.Activity;

        import android.provider.MediaStore;

        import android.view.View;

        import android.widget.Button;

        import android.widget.CheckBox;

        import android.widget.Toast;

        import android.widget.ImageView;

public class MainActivity extends Activity {

Button btn;

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

btn=(Button)findViewById(R.id.button);

        btn.setOnClickListener(new View.OnClickListener() {

            @Override

            public void onClick(View view) {

           Intent kamera=new Intent(MediaStore.ACTION_IMAGE_CAPTURE); // Resim çekme isteği ve activity başlatılıp id'si tanımlandı

                startActivityForResult(kamera,33);

            }

        });

   }

    @Override

    protected void onActivityResult(int requestCode, int resultCode, Intent data) {

        if(requestCode==33){

            Bitmap image=(Bitmap)data.getExtras().get("data");//Çekilen resim id olarak bitmap şeklinde alındı ve imageview'e atandı

            ImageView resim= (ImageView)findViewById(R.id.imageView);

            resim.setImageBitmap(image);

        }

       // super.onActivityResult(requestCode, resultCode, data);

    }

}

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<uses-permission android:name="android.permission.CAMERA"></uses-permission>

<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"></uses-permission>

<uses-feature android:name="android.hardware.Camera"></uses-feature>