ANDROID STUDIO：使用Camera API拍照->将此图片发送到另一个活动

Question

After I take a picture with the Camera API, this picture displays on the screen/this activity. I want to send this picture that covers the whole screen to another activity called PictureEditor. There I will add functionality that can edit the picture.

  // Code in MainActivity
  mCamera.takePicture(null, null, mPicture);
  Intent i = new Intent(getApplicationContext(), PictureEditor.class);
  Bitmap b = getBitmapFromView(mPreview);
  ByteArrayOutputStream bs = new ByteArrayOutputStream();
  b.compress(Bitmap.CompressFormat.PNG, 50, bs);
  i.putExtra("byteArray", bs.toByteArray());
  startActivity(i);

In PictureEditor I have this code in OnCreate.

  // Code in PictureEditor
  if(getIntent().hasExtra("byteArray")) {
  ImageView previewThumbnail = new ImageView(this);
  Bitmap b = BitmapFactory.decodeByteArray(
               getIntent().getByteArrayExtra("byteArray"),0,getIntent().getByteArrayExtra("byteArray").length);
        previewThumbnail.setImageBitmap(b);
    }

What can I do to retrive this picture in PictureEditor, and that this picture is the only thing that is visible on the screen in this activity? (Decode the bitmap and display it as an image on the screen)

Thanks for all kind of help!

Answer 1

// Code in PictureEditor
  if(getIntent().hasExtra("byteArray")) {
  ImageView previewThumbnail = new ImageView(this);
  Bitmap b =(Bitmap) getIntent().getParcelableExtra("byteArray");
        previewThumbnail.setImageBitmap(b);
    }

But if you send information between activitys. The size of this information cant exceed 1 MB. You have to compress your bitmap.

Answer 2

代替startActivity请调用startActivityForResult并在同一活动的onActivityResult回调方法中从捆绑包中获取图像，并将图像传递给新的Activity 。