Camera capture pictures (both front and back) and store into sdcard without opening the camera application

Introduction:
  Here I am going to explain how to take pictures from camera without users interactions. We just need to start an activity for result. This activity will have a surface view & this activity will start camera for preview for capturing image.an image should be captured from the camera without opening the camera application (the image should be captured in background).
 
demo

Using this code

MainActivity.java

package com.example.captureimagewithoutsurfaceview;

import android.app.Activity;

import android.content.Context;

import android.content.Intent;

import android.os.Bundle;

import android.view.View;

import android.view.View.OnClickListener;

import android.widget.Button;

import android.widget.ImageView;

public class MainActivity extends Activity {

public static int cameraID;

public static ImageView imgCapture;

Button btnFront,btnBack;

Context context;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

context=this;

imgCapture = (ImageView) findViewById(R.id.imageView1);

btnFront=(Button)findViewById(R.id.button1);

btnBack=(Button)findViewById(R.id.button2);

btnFront.setOnClickListener(new OnClickListener() {

@Override

public void onClick(View v) {

// TODO Auto-generated method stub

 cameraID = 1;

 Intent i = new Intent(context,CameraView.class);

 startActivity(i);

 }

});

btnBack.setOnClickListener(new OnClickListener() {

@Override

public void onClick(View v) {

// TODO Auto-generated method stub

 cameraID = 0;

 Intent i = new Intent(context,CameraView.class);

 startActivity(i);

}

});

}

}

activity_main.xml

<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" >

<Button

 android:id="@+id/button1"

 android:layout_width="wrap_content"

 android:layout_height="wrap_content"

 android:layout_above="@+id/button2"

 android:layout_centerInParent="true"

 android:text="Capture using Front Camera" />

<Button

 android:id="@+id/button2"

 android:layout_width="wrap_content"

 android:layout_height="wrap_content"

 android:layout_alignParentBottom="true"

 android:layout_centerInParent="true"

 android:layout_marginBottom="20dp"

 android:text="Capture using Back Camera" />

<ImageView

 android:id="@+id/imageView1"

 android:layout_width="300dp"

 android:layout_height="300dp"

 android:layout_centerInParent="true" />

</RelativeLayout>

CameraView.java

package com.example.captureimagewithoutsurfaceview;

import java.io.File;

import java.io.FileNotFoundException;

import java.io.FileOutputStream;

import java.text.SimpleDateFormat;

import java.util.Calendar;

import android.annotation.TargetApi;

import android.app.Activity;

import android.content.Context;

import android.graphics.Bitmap;

import android.graphics.BitmapFactory;

import android.graphics.Matrix;

import android.graphics.PixelFormat;

import android.hardware.Camera;

import android.os.Bundle;

import android.os.Environment;

import android.provider.MediaStore;

import android.util.Log;

import android.view.SurfaceHolder;

import android.view.SurfaceView;

import android.view.View;

import android.view.View.OnClickListener;

import android.view.Window;

import android.view.WindowManager;

public class CameraView extends Activity implements SurfaceHolder.Callback, OnClickListener{

private static final String TAG = "CameraTest";

Camera mCamera;

boolean mPreviewRunning = false;

Context context;

@SuppressWarnings("deprecation")

public void onCreate(Bundle icicle){

super.onCreate(icicle);

Log.e(TAG, "onCreate");

getWindow().setFormat(PixelFormat.TRANSLUCENT);

requestWindowFeature(Window.FEATURE_NO_TITLE);

getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,WindowManager.LayoutParams.FLAG_FULLSCREEN);

setContentView(R.layout.view);

context=this;

mSurfaceView = (SurfaceView) findViewById(R.id.surface_camera);

mSurfaceView.setOnClickListener(this);

mSurfaceHolder = mSurfaceView.getHolder();

mSurfaceHolder.addCallback(this);

mSurfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);

}

@Override

protected void onRestoreInstanceState(Bundle savedInstanceState){

super.onRestoreInstanceState(savedInstanceState);

}

Camera.PictureCallback mPictureCallback = new Camera.PictureCallback() {

public void onPictureTaken(byte[] data, Camera camera) {

// TODO Auto-generated method stub

if (data != null){

mCamera.stopPreview();

mPreviewRunning = false;

mCamera.release();

try{

BitmapFactory.Options opts = new BitmapFactory.Options();

Bitmap bitmap= BitmapFactory.decodeByteArray(data, 0, data.length,opts);

bitmap = Bitmap.createScaledBitmap(bitmap, 300, 300, false);

int width = bitmap.getWidth();

int height = bitmap.getHeight();

int newWidth = 300;

int newHeight = 300;

// calculate the scale - in this case = 0.4f

float scaleWidth = ((float) newWidth) / width;

float scaleHeight = ((float) newHeight) / height;

// createa matrix for the manipulation

Matrix matrix = new Matrix();

// resize the bit map

matrix.postScale(scaleWidth, scaleHeight);

// rotate the Bitmap

matrix.postRotate(-90);

Bitmap resizedBitmap = Bitmap.createBitmap(bitmap, 0, 0,

width, height, matrix, true);

MainActivity.imgCapture.setImageBitmap(resizedBitmap);

Calendar c = Calendar.getInstance();

SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");

String currentDateandTime = sdf.format(c.getTime());

Log.e("currentDateandTime", "" + currentDateandTime);

File mydir = new File(Environment.getExternalStorageDirectory() + "/CAPTURED_IMAGES/");

if(!mydir.exists())

{

mydir.mkdirs();

String extr = Environment.getExternalStorageDirectory().toString()

+ File.separator + "CAPTURED_IMAGES";

File myPath = new File(extr, currentDateandTime+".jpg");

FileOutputStream fos = null;

try {

fos = new FileOutputStream(myPath);

resizedBitmap.compress(Bitmap.CompressFormat.JPEG, 100, fos);

fos.flush();

fos.close();

MediaStore.Images.Media.insertImage(context.getContentResolver(),

resizedBitmap, myPath.getPath(), currentDateandTime);

} catch (FileNotFoundException e) {

// TODO Auto-generated catch block

e.printStackTrace();

} catch (Exception e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

}

else

{

Log.d("error", "dir. already exists");

String extr = Environment.getExternalStorageDirectory().toString()

+ File.separator + "CAPTURED_IMAGES";

File myPath = new File(extr, currentDateandTime+".jpg");

FileOutputStream fos = null;

try {

fos = new FileOutputStream(myPath);

resizedBitmap.compress(Bitmap.CompressFormat.JPEG, 100, fos);

fos.flush();

fos.close();

MediaStore.Images.Media.insertImage(context.getContentResolver(),

resizedBitmap, myPath.getPath(), currentDateandTime);

} catch (FileNotFoundException e) {

// TODO Auto-generated catch block

e.printStackTrace();

} catch (Exception e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

}

}catch(Exception e){

e.printStackTrace();

}

//StoreByteImage(mContext, imageData, 50,"ImageName");

//setResult(FOTO_MODE, mIntent);

setResult(585);

finish();

}

}

};

protected void onResume(){

Log.e(TAG, "onResume");

super.onResume();

}

protected void onSaveInstanceState(Bundle outState){

super.onSaveInstanceState(outState);

}

protected void onStop(){

Log.e(TAG, "onStop");

super.onStop();

}

@TargetApi(9)

public void surfaceCreated(SurfaceHolder holder){

Log.e(TAG, "surfaceCreated");

mCamera = Camera.open(MainActivity.cameraID);

}

public void surfaceChanged(SurfaceHolder holder, int format, int w, int h) {

Log.e(TAG, "surfaceChanged");

// XXX stopPreview() will crash if preview is not running

if (mPreviewRunning){

mCamera.stopPreview();

}

Camera.Parameters p = mCamera.getParameters();

p.setPreviewSize(300, 300);

mCamera.setParameters(p);

try{

mCamera.setPreviewDisplay(holder);

}catch (Exception e){

// TODO Auto-generated catch block

e.printStackTrace();

}

mCamera.startPreview();

mPreviewRunning = true;

mCamera.takePicture(null, mPictureCallback, mPictureCallback);

}

public void surfaceDestroyed(SurfaceHolder holder) {

Log.e(TAG, "surfaceDestroyed");

}

private SurfaceView mSurfaceView;

private SurfaceHolder mSurfaceHolder;

public void onClick(View v) {

// TODO Auto-generated method stub

mCamera.takePicture(null, mPictureCallback, mPictureCallback);

}

}

Androidmanifest.xml

<?xml version="1.0" encoding="utf-8"?>

<manifest xmlns:android="http://schemas.android.com/apk/res/android"

package="com.example.captureimagewithoutsurfaceview"

android:versionCode="1"

android:versionName="1.0" >

<uses-sdk

android:minSdkVersion="8"

android:targetSdkVersion="15" />

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

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

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

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

<application

android:allowBackup="true"

android:icon="@drawable/ic_launcher"

android:label="@string/app_name"

android:theme="@style/AppTheme" >

<activity

android:name=".MainActivity"

android:label="@string/app_name" >

<intent-filter>

<action android:name="android.intent.action.MAIN" />

<category android:name="android.intent.category.LAUNCHER" />

</intent-filter>

</activity>

<activity android:name=".CameraView" />

</application>

</manifest>

Happy coding...

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