如何将图像数据从一个活动传递到另一个活动？

Question

I am using two activities. One activity displays images in a GridView and by clicking on a particular image in that GridView it should display the full screen image in another activity.

How can I achieve this?

My MyGridView.java

mGridView.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View v, int position,long id) {
    // TODO Auto-generated method stub
    Toast.makeText(getApplicationContext(), "Image"+(position+1),Toast.LENGTH_SHORT).show();
    System.out.println(id);
    Intent i = new Intent(this, MyImageViewActivity.class);
    Bundle bundle = new Bundle();
    bundle.putInt("image", position);
    i.putExtras(bundle);
    startActivityForResult(i, 0);
}
});

Answer 1

Pass the image URL/Uri instead of passing raw image data.

Answer 2

You pass parameters to an Activity in an Intent. If the image comes from a file, pass the path String, otherwise pass the Bitmap

startActivity(new Intent(this, YourActivity.class).putExtras(new Bundle().putParcelable("bitmap", Bitmap)))

Answer 3

To pass the data between two activities:

bytes[] imgs = ... // your image
Intent intent = new Intent(this, YourActivity.class);
intent.putExtra("img", imgs);
startActivity(intent);

Then in YourActivity:

bytes[] receiver = getIntent().getExtra("imgs");

Also go thro this link which wil also help u.
Here u can know how to convert bitmap to bytes

Answer 4

In MyGridView: (someInteger is an integer that represents the index of the selected image

Intent myIntent = new Intent(this, MyImageViewActivity.class);
Bundle bundle = new Bundle();
bundle.putInt("image", someInteger);
myIntent.putExtras(bundle);
startActivityForResult(myIntent, 0);

In MyImageViewActivity:

Bundle bundle = this.getIntent().getExtras();
int pic = bundle.getInt("image");

of course, you can put anything in the bundle! maybe a byte array or something

Answer 5

Once an item of Grid View is clicked, get the clicked item and pass it to next activity as an argument through PutExtra . In the next activity retrieve the image from extras and display it to user

Answer 6

I suppose you need use Intent class.

Intent intent = new Intent(YourSourceActivity.this, TargetActivty.class);
Bundle addinfo = new Bundle();

addinfo.putInt("imageid", someid);

intent.putExtras(addinfo);

Answer 7

This is my process: it's so good. Activity1:

ByteArrayOutputStream stream=new ByteArrayOutputStream();
    bitmap.compress(Bitmap.CompressFormat.JPEG,100,stream);
    byte[] byteArray=stream.toByteArray();
    Intent intent = new Intent(getApplicationContext(), FrameActivity.class);
    intent.putExtra("Image", byteArray);
    startActivity(intent);

in FrameActivity.class

collageView = (CollageView) findViewById(R.id.btn_collage);
    byte[] byteArray = getIntent().getByteArrayExtra("Image");
    Bitmap bmp = BitmapFactory.decodeByteArray(byteArray, 0, byteArray.length);
    collageView.setImageBitmap(bmp);

Answer 8

Try passing id related to image through intent.putExtra(), and receive it through bundle on launched activity.

Answer 9

in Activity convert the image to ByteArray and append it to the intent as

intent.putExtra("img",<ByteArray>);

then startActivity B.

In Activity B

Bitmap bm = BitmapFactory.decodeByteArray(getIntent().getByteArrayExtra("img"), 0, getIntent().getByteArrayExtra("img").length);

This way you can pass image between activity.