package org.winplus.camera;  import java.io.File; import java.io.FileOutputStream; import java.io.IOException; import java.util.Date;  import android.app.Activity; import android.content.pm.ActivityInfo; import android.graphics.PixelFormat; import android.hardware.Camera; import android.os.AsyncTask; import android.os.Bundle; import android.os.Environment; import android.text.format.DateFormat; import android.util.Log; import android.view.KeyEvent; import android.view.SurfaceHolder; import android.view.SurfaceView; import android.view.View; import android.view.Window; import android.view.View.OnClickListener; import android.widget.Button;  public class CameraDemoActivity extends Activity{   private final static String TAG = "CameraActivity";  private SurfaceView surfaceView;  private SurfaceHolder surfaceHolder;  private Camera camera;  private File picture;  private Button btnSave;    @Override  public void onCreate(Bundle savedInstanceState) {   super.onCreate(savedInstanceState);   setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);   this.requestWindowFeature(Window.FEATURE_NO_TITLE);   setContentView(R.layout.main);   setupViews();  }    private void setupViews(){   surfaceView = (SurfaceView) findViewById(R.id.camera_preview); // Camera interface to instantiate components   surfaceHolder = surfaceView.getHolder(); // Camera interface to instantiate components   surfaceHolder.addCallback(surfaceCallback); // Add a callback for the SurfaceHolder   surfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);      btnSave = (Button) findViewById(R.id.save_pic);      btnSave.setOnClickListener(new OnClickListener() {        @Override    public void onClick(View v) {     takePic();    }   });  }      @Override  public boolean onKeyDown(int keyCode, KeyEvent event) {   if (keyCode == KeyEvent.KEYCODE_CAMERA     || keyCode == KeyEvent.KEYCODE_SEARCH) {    takePic();    return true;   }   return super.onKeyDown(keyCode, event);  }   private void takePic() {    camera.stopPreview();// stop the preview    camera.takePicture(null, null, pictureCallback); // picture  }   // Photo call back  Camera.PictureCallback pictureCallback = new Camera.PictureCallback() {   //@Override   public void onPictureTaken(byte[] data, Camera camera) {    new SavePictureTask().execute(data);    camera.startPreview();   }  };   // save pic  class SavePictureTask extends AsyncTask<byte[], String, String> {   @Override   protected String doInBackground(byte[]... params) {    String fname = DateFormat.format("yyyyMMddhhmmss", new Date()).toString()+".jpg";        Log.i(TAG, "fname="+fname+";dir="+Environment.getExternalStorageDirectory());    //picture = new File(Environment.getExternalStorageDirectory(),fname);// create file        picture = new File(Environment.getExternalStorageDirectory()+"/"+fname);        try {     FileOutputStream fos = new FileOutputStream(picture.getPath()); // Get file output stream     fos.write(params[0]); // Written to the file     fos.close();    } catch (Exception e) {     e.printStackTrace();    }    return null;   }  }   // SurfaceHodler Callback handle to open the camera, off camera and photo size changes  SurfaceHolder.Callback surfaceCallback = new SurfaceHolder.Callback() {    public void surfaceCreated(SurfaceHolder holder) {    Log.i(TAG, "surfaceCallback====");    camera = Camera.open(); // Turn on the camera    try {     camera.setPreviewDisplay(holder); // Set Preview    } catch (IOException e) {     camera.release();// release camera     camera = null;    }   }    public void surfaceChanged(SurfaceHolder holder, int format, int width,     int height) {    Log.i(TAG,"====surfaceChanged");    Camera.Parameters parameters = camera.getParameters(); // Camera parameters to obtain    parameters.setPictureFormat(PixelFormat.JPEG);// Setting Picture Format //   parameters.set("rotation", 180); // Arbitrary rotation    camera.setDisplayOrientation(0); //   parameters.setPreviewSize(400, 300); // Set Photo Size    camera.setParameters(parameters); // Setting camera parameters    camera.startPreview(); // Start Preview   }    public void surfaceDestroyed(SurfaceHolder holder) {    Log.i(TAG,"====surfaceDestroyed");    camera.stopPreview();// stop preview    camera.release(); // Release camera resources    camera = null;   }  }; } 

<?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" >   <android.view.SurfaceView   android:id="@+id/camera_preview"   android:layout_width="800dip"   android:layout_height="600dip"   android:layout_alignParentTop="true"   android:layout_centerInParent="true"   android:layout_gravity="center_vertical|center_horizontal" />   <Button   android:id="@+id/save_pic"   android:layout_width="fill_parent"   android:layout_height="wrap_content"   android:text="@string/txt_save" />  </LinearLayout> 

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