Camera without preview in android

Camera sample program without preview/How to take photo without a preview in android program

package com.sample import java.io.FileNotFoundException; import java.io.FileOutputStream; import java.io.IOException; import android.app.Activity; import android.graphics.Bitmap; import android.graphics.BitmapFactory; import android.hardware.Camera; import android.hardware.Camera.Parameters; import android.os.Bundle; import android.util.Log; import android.view.SurfaceHolder; import android.view.SurfaceView; import android.widget.ImageView; public class TakePicture extends Activity implements SurfaceHolder.Callback {       //a variable to store a reference to the Image View at the main.xml file       private ImageView iv_image;       //a variable to store a reference to the Surface View at the main.xml file     private SurfaceView sv;         //a bitmap to display the captured image       private Bitmap bmp;             //Camera variables       //a surface holder       private SurfaceHolder sHolder;        //a variable to control the camera       private Camera mCamera;       //the camera parameters       private Parameters parameters;           /** Called when the activity is first created. */     @Override     public void onCreate(Bundle savedInstanceState)     {         super.onCreate(savedInstanceState);         setContentView(R.layout.main);                 //get the Image View at the main.xml file         iv_image = (ImageView) findViewById(R.id.imageView);                 //get the Surface View at the main.xml file         sv = (SurfaceView) findViewById(R.id.surfaceView);                 //Get a surface         sHolder = sv.getHolder();                 //add the callback interface methods defined below as the Surface   View callbacks         sHolder.addCallback(this);                 //tells Android that this surface will have its data constantly replaced         sHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);     }       public void surfaceChanged(SurfaceHolder arg0, int arg1, int arg2, int arg3)       {              //get camera parameters              parameters = mCamera.getParameters();                            //set camera parameters            mCamera.setParameters(parameters);            mCamera.startPreview();                       //sets what code should be executed after the picture is taken            Camera.PictureCallback mCall = new Camera.PictureCallback()            {                          public void onPictureTaken(byte[] data, Camera camera)              {                    //decode the data obtained by the camera into a Bitmap                    bmp = BitmapFactory.decodeByteArray(data, 0, data.length);                    //set the iv_image                    iv_image.setImageBitmap(bmp);                    FileOutputStream outStream = null;                         try{                             outStream = new FileOutputStream("/sdcard/Image"+System.currentTimeMillis()+".jpg");                             outStream.write(data);                             outStream.close();                         } catch (FileNotFoundException e){                             Log.d("CAMERA", e.getMessage());                         } catch (IOException e){                             Log.d("CAMERA", e.getMessage());                         }              }            };                       mCamera.takePicture(null, null, mCall);       }       public void surfaceCreated(SurfaceHolder holder)       {             // The Surface has been created, acquire the camera and tell it where         // to draw the preview.         mCamera = Camera.open();         try {            mCamera.setPreviewDisplay(holder);                     } catch (IOException exception) {             mCamera.release();             mCamera = null;         }       }       public void surfaceDestroyed(SurfaceHolder holder)       {             //stop the preview             mCamera.stopPreview();             //release the camera         mCamera.release();         //unbind the camera from this object         mCamera = null;       }  }

<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"     android:orientation="vertical"     android:layout_width="fill_parent"     android:layout_height="fill_parent"     >                   <SurfaceView                   android:id="@+id/surfaceView"                   android:layout_height="match_parent"                   android:layout_width="match_parent">                   </SurfaceView>                   <ImageView                   android:layout_width="wrap_content"                   android:layout_height="wrap_content"                   android:id="@+id/imageView">                   </ImageView> </LinearLayout>

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