try {
　　  Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
　　  startActivityForResult(intent, 0);
 
} catch (ActivityNotFoundException e) {
　　  // Do nothing for now
}

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
 try {
  if (requestCode != 0) {
  return;
  }
  super.onActivityResult(requestCode, resultCode, data);
  Bundle extras = data.getExtras();
  Bitmap b = (Bitmap) extras.get("data");
  //
  //
  ImageView a = (ImageView)findViewById(R.id.imageView1);
  a.setImageBitmap(b);
  //
  /*
  * 得到图片对图片处理...
  */
 } catch (Exception e) {
  // TODO: handle exception
  System.out.println(e.getMessage());
 }
}