android: Take camera picture without "save" / "delete" confirmation

Use "android.intent.extra.quickCapture"

Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
intent.putExtra("android.intent.extra.quickCapture",true);
if (intent.resolveActivity(getPackageManager()) != null) {
    startActivityForResult(intent, REQUEST_IMAGE_CAPTURE);
}

You ca use the SurfaceView to capture image

package com.camera;

import java.io.IOException;

import android.app.Activity;
import android.content.Intent;
import android.hardware.Camera;
import android.os.Bundle;
import android.util.Log;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;

public class Camera_capture extends Activity implements SurfaceHolder.Callback {

private Camera mCamera;
private SurfaceView surfaceView;
private SurfaceHolder surfaceHolder;
private Button capture_image;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.camera_layout);
    capture_image = (Button) findViewById(R.id.capture_image);
    capture_image.setOnClickListener(new View.OnClickListener() {

        @Override
        public void onClick(View v) {
            capture();
        }
    });
    surfaceView = (SurfaceView) findViewById(R.id.surfaceview);
    surfaceHolder = surfaceView.getHolder();
    surfaceHolder.addCallback(Camera_capture.this);
    surfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
    try {
        mCamera = Camera.open();
        mCamera.setPreviewDisplay(surfaceHolder);
        mCamera.startPreview();
    } catch (IOException e) {
        e.printStackTrace();
    }
}

private void capture() {
    mCamera.takePicture(null, null, null, new Camera.PictureCallback() {

        @Override
        public void onPictureTaken(byte[] data, Camera camera) {
            Toast.makeText(getApplicationContext(), "Picture Taken",
                    Toast.LENGTH_SHORT).show();
            Intent intent = new Intent();
            intent.putExtra("image_arr", data);
            setResult(RESULT_OK, intent);
            camera.stopPreview();
            if (camera != null) {
                camera.release();
                mCamera = null;
            }
            finish();
        }
    });
}

@Override
public void surfaceChanged(SurfaceHolder holder, int format, int width,
        int height) {
    Log.e("Surface Changed", "format   ==   " + format + ",   width  ===  "
            + width + ", height   ===    " + height);
    try {
        mCamera.setPreviewDisplay(holder);
        mCamera.startPreview();
    } catch (IOException e) {
        e.printStackTrace();
    }
}

@Override
public void surfaceCreated(SurfaceHolder holder) {
    Log.e("Surface Created", "");
}

@Override
public void surfaceDestroyed(SurfaceHolder holder) {
    Log.e("Surface Destroyed", "");
}

@Override
protected void onPause() {
    super.onPause();
    if (mCamera != null) {
        mCamera.stopPreview();
        mCamera.release();
    }
}
}

And the layout file would be

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >

<SurfaceView
    android:id="@+id/surfaceview"
    android:layout_width="fill_parent"
    android:layout_weight="100"
    android:layout_height="wrap_content" />

<Button
    android:id="@+id/capture_image"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:layout_weight="1"
    android:text="Capture" />

</LinearLayout>

Start this Camera_capture activity with startActivityForResult and onActivityResult you can get the image as byte array as

byte[] image = data.getExtras().getByteArray("image_arr");

where data is the received data.

Decode the byte array to Bitmap using

Bitmap bmp = BitmapFactory.decodeByteArray(image, 0,
                    image.length);

now set this Bitmap

---

Edit

As there is some problem while returning byte[], the byte[] should be save in a file and the path of the file should be sent to the previous Activity so that file can be read.

In onPictureTaken(), just add

String PATH = "Any path to store a file";
try {
    FileOutputStream fos=new FileOutputStream(PATH);

    fos.write(data);
    fos.close();
  }
  catch (java.io.IOException e) {

  }

and in place of :

intent.putExtra("image_arr", data);

write

intent.putExtra("image_path", PATH);

and receive this path in previous Activity's onActivityResult as :

String imagePath = data.getExtras().getString("image_path");

If your image is rotated, you can use this:

mCamera.setDisplayOrientation(90);

after

mCamera.startPreview();