how to create custom camera in android example

Detecting camera hardware

private boolean checkCameraHardware(Context context) {
    if (context.getPackageManager().hasSystemFeature(PackageManager.FEATURE_CAMERA)){
    
        return true;
    } else {
     
        return false;
    }
}

Accessing cameras


public static Camera getCameraInstance(){
    Camera c = null;
    try {
        c = Camera.open();
    }
    catch (Exception e){
      
    }
    return c;
}


Creating a preview class

public class CameraPreview extends SurfaceView implements SurfaceHolder.Callback {
    private SurfaceHolder mHolder;
    private Camera mCamera;

    public CameraPreview(Context context, Camera camera) {
        super(context);
        mCamera = camera;

       
        mHolder = getHolder();
        mHolder.addCallback(this);
       
        mHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
    }

    public void surfaceCreated(SurfaceHolder holder) {
     
        try {
            mCamera.setPreviewDisplay(holder);
            mCamera.startPreview();
        } catch (IOException e) {
            Log.d(TAG, "Error setting camera preview: " + e.getMessage());
        }
    }

    public void surfaceDestroyed(SurfaceHolder holder) {
       
    }

    public void surfaceChanged(SurfaceHolder holder, int format, int w, int h) {
     
        if (mHolder.getSurface() == null){
        
          return;
        }
        try {
            mCamera.stopPreview();
        } catch (Exception e){
         
        }

        try {
            mCamera.setPreviewDisplay(mHolder);
            mCamera.startPreview();

        } catch (Exception e){
            Log.d(TAG, "Error starting camera preview: " + e.getMessage());
        }
    }
}

preview in a layout

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="horizontal"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent">
  <FrameLayout
    android:id="@+id/camera_preview"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:layout_weight="1"/>

  <Button
    android:id="@+id/button_capture"
    android:text="Capture"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_gravity="center"/>
</LinearLayout>

 Creating a CameraActivity class.

public class CameraActivity extends Activity {

    private Camera mCamera;
    private CameraPreview mPreview;
    private Camera mCamera;
    private SurfaceView mPreview;
    private MediaRecorder mMediaRecorder;
    public static final int MEDIA_TYPE_IMAGE = 1;
    public static final int MEDIA_TYPE_VIDEO = 2;
    private boolean isRecording = false;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        // Create an instance of Camera
        mCamera = getCameraInstance();

        // Create our Preview view and set it as the content of our activity.
        mPreview = new CameraPreview(this, mCamera);
        FrameLayout preview = (FrameLayout) findViewById(R.id.camera_preview);
        preview.addView(mPreview);


    Button captureButton = (Button) findViewById(id.button_capture);
    captureButton.setOnClickListener(
        new View.OnClickListener() {
            @Override
            public void onClick(View v) {
               
                mCamera.takePicture(null, null, mPicture);

            }
        });

Button captureButton = (Button) findViewById(id.button_capture);
captureButton.setOnClickListener(
    new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            if (isRecording) {
               
                mMediaRecorder.stop();
                releaseMediaRecorder();
                mCamera.lock();        

             
                setCaptureButtonText("Capture");
                isRecording = false;
            } else {
               
                if (prepareVideoRecorder()) {
                  
                    mMediaRecorder.start();

                   
                    setCaptureButtonText("Stop");
                    isRecording = true;
                } else {
                 
                    releaseMediaRecorder();
                   
                }
            }
        }
    });
 }

private PictureCallback mPicture = new PictureCallback() {

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

        File pictureFile = getOutputMediaFile(MEDIA_TYPE_IMAGE);
        if (pictureFile == null){
            Log.d(TAG, "Error creating media file, check storage permissions: " +
                e.getMessage());
            return;
        }

        try {
            FileOutputStream fos = new FileOutputStream(pictureFile);
            fos.write(data);
            fos.close();
        } catch (FileNotFoundException e) {
            Log.d(TAG, "File not found: " + e.getMessage());
        } catch (IOException e) {
            Log.d(TAG, "Error accessing file: " + e.getMessage());
        }
    }
  };

private boolean prepareVideoRecorder(){
    mMediaRecorder = new MediaRecorder();
  
    mCamera.unlock();
    mMediaRecorder.setCamera(mCamera);
  
    mMediaRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);    
    mMediaRecorder.setVideoSource(MediaRecorder.VideoSource.CAMERA);       
    mMediaRecorder.setOutputFormat(MediaRecorder.OutputFormat.MPEG_4);
    mMediaRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);
    mMediaRecorder.setVideoEncoder(MediaRecorder.VideoEncoder.MPEG_4_SP);
    mMediaRecorder.setOutputFile(getOutputMediaFile(MEDIA_TYPE_VIDEO).toString());
    mMediaRecorder.setPreviewDisplay(mPreview.getHolder().getSurface());

    try {
        mMediaRecorder.prepare();
    } catch (IllegalStateException e) {
        Log.d(TAG, "IllegalStateException preparing MediaRecorder: " + e.getMessage());
        releaseMediaRecorder();
        return false;
    } catch (IOException e) {
        Log.d(TAG, "IOException preparing MediaRecorder: " + e.getMessage());
        releaseMediaRecorder();
        return false;
    }
    return true;
}

private static Uri getOutputMediaFileUri(int type){
      return Uri.fromFile(getOutputMediaFile(type));
}

private static File getOutputMediaFile(int type){
  
    File mediaStorageDir = new File(Environment.getExternalStoragePublicDirectory(
              Environment.DIRECTORY_PICTURES), "MyCameraApp");
   
  
    if (! mediaStorageDir.exists()){
        if (! mediaStorageDir.mkdirs()){
            Log.d("MyCameraApp", "failed to create directory");
            return null;
        }
    }
  
    String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss").format(new Date());
    File mediaFile;
    if (type == MEDIA_TYPE_IMAGE){
        mediaFile = new File(mediaStorageDir.getPath() + File.separator +
        "IMG_"+ timeStamp + ".jpg");
    } else if(type == MEDIA_TYPE_VIDEO) {
        mediaFile = new File(mediaStorageDir.getPath() + File.separator +
        "VID_"+ timeStamp + ".mp4");
    } else {
        return null;
    }

    return mediaFile;
}

@Override
    protected void onPause() {
        super.onPause();
        releaseMediaRecorder();      
        releaseCamera();             
    }

    private void releaseMediaRecorder(){
        if (mMediaRecorder != null) {
            mMediaRecorder.reset();  
            mMediaRecorder.release();
            mMediaRecorder = null;
            mCamera.lock();          
        }
    }

    private void releaseCamera(){
        if (mCamera != null){
            mCamera.release();      
            mCamera = null;
        }
    }
}

how to open camera using camera intent in android

private static final int CAPTURE_IMAGE_ACTIVITY_REQUEST_CODE = 100;
private static final int CAPTURE_VIDEO_ACTIVITY_REQUEST_CODE = 200;

private Uri fileUri;


// CAPTURE IMAGE intent
   Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
   fileUri = getOutputMediaFileUri(MEDIA_TYPE_IMAGE);
   intent.putExtra(MediaStore.EXTRA_OUTPUT, fileUri);
   startActivityForResult(intent, CAPTURE_IMAGE_ACTIVITY_REQUEST_CODE);

//CAPTURE VIDEO Intent
  Intent intent = new Intent(MediaStore.ACTION_VIDEO_CAPTURE);
  fileUri = getOutputMediaFileUri(MEDIA_TYPE_VIDEO);
  intent.putExtra(MediaStore.EXTRA_OUTPUT, fileUri);
  intent.putExtra(MediaStore.EXTRA_VIDEO_QUALITY, 1);
  startActivityForResult(intent, CAPTURE_VIDEO_ACTIVITY_REQUEST_CODE);

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    if (requestCode == CAPTURE_IMAGE_ACTIVITY_REQUEST_CODE) {
        if (resultCode == RESULT_OK) {
         
            Toast.makeText(this, "Image saved to:\n" +
                     data.getData(), Toast.LENGTH_LONG).show();
        } else if (resultCode == RESULT_CANCELED) {
          
        } else {
           
        }
    }

    if (requestCode == CAPTURE_VIDEO_ACTIVITY_REQUEST_CODE) {
        if (resultCode == RESULT_OK) {
          
            Toast.makeText(this, "Video saved to:\n" +
                     data.getData(), Toast.LENGTH_LONG).show();
        } else if (resultCode == RESULT_CANCELED) {
           
        } else {
         
        }
    }
}

<uses-permission android:name="android.permission.CAMERA" />
<uses-feature android:name="android.hardware.camera" />
<uses-feature android:name="android.hardware.camera" android:required="false" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.RECORD_AUDIO" />

how to scan barcode in android example

//call intent your scan button

Intent intent = new Intent(TrackingActivity.this,CameraTestActivity.class);
startActivity(intent);

//add this CameraPreview

CameraPreview.java

import java.io.IOException;

import android.app.Activity;
import android.os.Bundle;

import android.util.Log;

import android.view.View;
import android.view.Surface;
import android.view.SurfaceView;
import android.view.SurfaceHolder;

import android.content.Context;

import android.hardware.Camera;
import android.hardware.Camera.PreviewCallback;
import android.hardware.Camera.AutoFocusCallback;
import android.hardware.Camera.Parameters;

/** A basic Camera preview class */
public class CameraPreview extends SurfaceView implements SurfaceHolder.Callback {
    private SurfaceHolder mHolder;
    private Camera mCamera;
    private PreviewCallback previewCallback;
    private AutoFocusCallback autoFocusCallback;

    public CameraPreview(Context context, Camera camera,
                         PreviewCallback previewCb,
                         AutoFocusCallback autoFocusCb) {
        super(context);
        mCamera = camera;
        previewCallback = previewCb;
        autoFocusCallback = autoFocusCb;

        /*
         * Set camera to continuous focus if supported, otherwise use
         * software auto-focus. Only works for API level >=9.
         */
        /*
        Camera.Parameters parameters = camera.getParameters();
        for (String f : parameters.getSupportedFocusModes()) {
            if (f == Parameters.FOCUS_MODE_CONTINUOUS_PICTURE) {
                mCamera.setFocusMode(Parameters.FOCUS_MODE_CONTINUOUS_PICTURE);
                autoFocusCallback = null;
                break;
            }
        }
        */

        // Install a SurfaceHolder.Callback so we get notified when the
        // underlying surface is created and destroyed.
        mHolder = getHolder();
        mHolder.addCallback(this);

        // deprecated setting, but required on Android versions prior to 3.0
        mHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
    }

    public void surfaceCreated(SurfaceHolder holder) {
        // The Surface has been created, now tell the camera where to draw the preview.
        try {
            mCamera.setPreviewDisplay(holder);
        } catch (IOException e) {
            Log.d("DBG", "Error setting camera preview: " + e.getMessage());
        }
    }

    public void surfaceDestroyed(SurfaceHolder holder) {
        // Camera preview released in activity
    }

    public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
        /*
         * If your preview can change or rotate, take care of those events here.
         * Make sure to stop the preview before resizing or reformatting it.
         */
        if (mHolder.getSurface() == null){
          // preview surface does not exist
          return;
        }

        // stop preview before making changes
        try {
            mCamera.stopPreview();
        } catch (Exception e){
          // ignore: tried to stop a non-existent preview
        }

        try {
            // Hard code camera surface rotation 90 degs to match Activity view in portrait
            mCamera.setDisplayOrientation(90);

            mCamera.setPreviewDisplay(mHolder);
            mCamera.setPreviewCallback(previewCallback);
            mCamera.startPreview();
            mCamera.autoFocus(autoFocusCallback);
        } catch (Exception e){
            Log.d("DBG", "Error starting camera preview: " + e.getMessage());
        }
    }
}

CameraTestActivity.java

import net.sourceforge.zbar.Config;
import net.sourceforge.zbar.Image;
import net.sourceforge.zbar.ImageScanner;
import net.sourceforge.zbar.Symbol;
import net.sourceforge.zbar.SymbolSet;
import android.app.Activity;
import android.content.pm.ActivityInfo;
import android.hardware.Camera;
import android.hardware.Camera.AutoFocusCallback;
import android.hardware.Camera.PreviewCallback;
import android.hardware.Camera.Size;
import android.os.Bundle;
import android.os.Handler;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.FrameLayout;
import android.widget.TextView;


/* Import ZBar Class files */

public class CameraTestActivity extends Activity
{
    private Camera mCamera;
    private CameraPreview mPreview;
    private Handler autoFocusHandler;

//    TextView scanText;
//    Button scanButton;

    ImageScanner scanner;
   
    private boolean barcodeScanned = false;
    private boolean previewing = true;

    static {
        System.loadLibrary("iconv");
    }

    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        setContentView(R.layout.main);

        setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);

        autoFocusHandler = new Handler();
        mCamera = getCameraInstance();

        /* Instance barcode scanner */
        scanner = new ImageScanner();
        scanner.setConfig(0, Config.X_DENSITY, 3);
        scanner.setConfig(0, Config.Y_DENSITY, 3);

        mPreview = new CameraPreview(this, mCamera, previewCb, autoFocusCB);
        FrameLayout preview = (FrameLayout)findViewById(R.id.cameraPreview);
        preview.addView(mPreview);

//        scanText = (TextView)findViewById(R.id.scanText);

//       scanButton = (Button)findViewById(R.id.ScanButton);

//       scanButton.setOnClickListener(new OnClickListener() {
//               public void onClick(View v) {
                    if (barcodeScanned) {
                        barcodeScanned = false;
//                       scanText.setText("Scanning...");
                        mCamera.setPreviewCallback(previewCb);
                        mCamera.startPreview();
                        previewing = true;
                        mCamera.autoFocus(autoFocusCB);
                    }
//                }
//          });
    }

    public void onPause() {
        super.onPause();
        releaseCamera();
    }

    /** A safe way to get an instance of the Camera object. */
    public static Camera getCameraInstance(){
        Camera c = null;
        try {
            c = Camera.open();
        } catch (Exception e){
        }
        return c;
    }

    private void releaseCamera() {
        if (mCamera != null) {
            previewing = false;
            mCamera.setPreviewCallback(null);
            mCamera.release();
            mCamera = null;
        }
    }

    private Runnable doAutoFocus = new Runnable() {
            public void run() {
                if (previewing)
                    mCamera.autoFocus(autoFocusCB);
            }
        };

    PreviewCallback previewCb = new PreviewCallback() {
            public void onPreviewFrame(byte[] data, Camera camera) {
                Camera.Parameters parameters = camera.getParameters();
                Size size = parameters.getPreviewSize();

                Image barcode = new Image(size.width, size.height, "Y800");
                barcode.setData(data);

                int result = scanner.scanImage(barcode);
                Datalist.result = result;
               
                if (result != 0) {
                    previewing = false;
                    mCamera.setPreviewCallback(null);
                    mCamera.stopPreview();
                   
                    SymbolSet syms = scanner.getResults();
                    for (Symbol sym : syms) {
//                        scanText.setText("barcode result " + sym.getData());
                        Datalist.barcode_result = sym.getData();
                        barcodeScanned = true;
                       
                    }
                    onBackPressed();
                }
            }
        };

    // Mimic continuous auto-focusing
    AutoFocusCallback autoFocusCB = new AutoFocusCallback() {
            public void onAutoFocus(boolean success, Camera camera) {
                autoFocusHandler.postDelayed(doAutoFocus, 1000);
            }
        };
}

//add permission

AndroidManifest

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

// libray

https://github.com/dm77/ZBarScanner

how to open gmail Intent in android

/* Create the Intent */
            Intent email = new Intent(Intent.ACTION_SEND);
            email.putExtra(Intent.EXTRA_EMAIL,new String[] { "xyz@gmail.com" });
            email.putExtra(Intent.EXTRA_SUBJECT, "SUBJECT");
            email.putExtra(Intent.EXTRA_TEXT, "MESSAGE");
            email.setType("message/rfc822");
            email.setClassName("com.google.android.gm", "com.google.android.gm.ComposeActivityGmail");
            startActivity(email);

new update Integrating AdMob in your Android App example

activity_main.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    xmlns:ads="http://schemas.android.com/apk/lib/com.google.ads"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

 <com.google.ads.AdView
        android:id="@+id/AdView"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        ads:adSize="BANNER"
        ads:adUnitId="@string/banner_ad_unit_id"
        ads:loadAdOnCreate="True" />

</RelativeLayout>

AndroidManifest.xml

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

<activity android:name="com.google.ads.AdActivity"    android:configChanges="keyboard|keyboardHidden|orientation|screenLayout|uiMode|screenSize|smallestScreenSize" />

add libs folder bellow jar file

- GoogleAdMobAdsSdk-6.0.1.jar

how to Creating SOAP Parsar in android example

/** Call this Method **/
WebserviceCall com = new WebserviceCall();
SoapResponse = com.getConvertedWeight("enter your method name");

/** Creating SOAP Parsar Method **/
    class WebserviceCall {
        /** Variable Decleration **/

        String namespace = "http://testing.org/";
        private String url = "http://testing/demo/details.asmx";
        String SOAP_ACTION;
        SoapObject request = null, objMessages = null;
        SoapSerializationEnvelope envelope;       
        AndroidHttpTransport androidHttpTransport;
        WebserviceCall() {
        }
        /** Set Envelope */       
        protected void SetEnvelope() {
            try {
                // Creating SOAP envelope
                envelope = new SoapSerializationEnvelope(SoapEnvelope.VER11);
                // You can comment that line if your web service is not .NET
                // one.
                envelope.dotNet = true;
                envelope.setOutputSoapObject(request);
                androidHttpTransport = new AndroidHttpTransport(url);
                androidHttpTransport.debug = true;
            } catch (Exception e) {
                System.out.println("Soap Exception---->" + e.toString());
            }
        }

        // MethodName variable is define for which webservice function will call
        public String getConvertedWeight(String MethodName) {

            try {
                SOAP_ACTION = namespace + MethodName;
                // Adding values to request object
                request = new SoapObject(namespace, MethodName);
                // Adding Double value to request object
                    PropertyInfo weightProp = new PropertyInfo();
                    weightProp.setName("id");
                    weightProp.setValue(0);
                    weightProp.setType(int.class);
                    request.addProperty(weightProp);
                    request.addProperty("Username", "testing");
                    request.addProperty("Password", "1234567");
                 }             
                SetEnvelope();

                try {
                    // SOAP calling webservice
                    androidHttpTransport.call(SOAP_ACTION, envelope);
                    // Got Webservice response
                    String result = envelope.getResponse().toString();
                   
                    System.out.println("result----->"+result);
                  return result;

                } catch (Exception e) {
                    // TODO: handle exception
                    return e.toString();
                }
            } catch (Exception e) {
                // TODO: handle exception
                return e.toString();
            }

        }
    }

 Note :
//download jar file for soap parsar
Name for jar file -ksoap2-android-assembly-2.5.8-jar-with-dependencies

simple call Intent in android

Intent callIntent = new Intent(Intent.ACTION_CALL);                    callIntent.setData(Uri.parse("tel:"+"1234567890");
startActivity(callIntent);