+  @Override

+  public void onClick(View v) {

+    /*this can also be getApplicationContext(), the important is to get the context*/

+    new AlertDialog.Builder(this())

+    /*Instead */

+      .setTitle("Title")

+      .setMessage("Mensaje")

+      .setPositiveButton("Camera", new DialogInterface.OnClickListener() {

+        public void onClick(DialogInterface dialog, int which) {

+            /*Calling the camera*/

+          Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);

+          startActivityForResult(intent, 0);

+          dialog.cancel();

+        }

+      }).setNegativeButton("Gallery", new DialogInterface.OnClickListener() {

+      public void onClick(DialogInterface dialog, int which) {

+      /*Select Image from Gallery*/

+        Intent intent = new Intent(Intent.ACTION_PICK, android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);

+        intent.setType("image/*");

+        startActivityForResult(intent, 0);

+        dialog.cancel();

+      }

+    }).setIcon(android.R.drawable.ic_dialog_alert)

+      .show();

+  }