how to pass image from listview item to a dialog box WITHOUT the use of an intent

问题

I have an activity and custom dialog. the activity has two textview and 1 image view. the dialog box has a textview and an imageview. when a user clicks the item in the listview the dialog box shows. i am trying to get the imageview from the activity to show in the dialog box's imageview. With some help, i got the textview from the activity to the dialog box. but i am having problems passing the image as well.

My custom dialog:

public class MyDialogFragment extends DialogFragment {
@Override
public Dialog onCreateDialog(Bundle savedInstanceState) {
    // Use the Builder class for convenient dialog construction
    AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
 // Get the layout inflater
    LayoutInflater inflater = getActivity().getLayoutInflater();
 // Inflate and set the layout for the dialog
    // Pass null as the parent view because its going in the dialog layout
    //builder.setView(inflater.inflate(R.layout.dialogb, null));
    View content = inflater.inflate(R.layout.dialogb, null);
    TextView dialogt = (TextView) content.findViewById(R.id.dialog_text);
    ImageView dialogImg = (ImageView)content.findViewById(R.id.dialog_pic);
    dialogImg.setId(getArguments().getInt("id"));
    dialogt.setText(getArguments().getCharSequence("text"));
    builder.setView(content);
    builder.setMessage(R.string.dialog_Event)
           .setPositiveButton(R.string.add_to_cal, new DialogInterface.OnClickListener() {
               public void onClick(DialogInterface dialog, int id) {
                   // FIRE ZE MISSILES!
                   Toast.makeText(MyDialogFragment.this.getActivity(), "testing", Toast.LENGTH_LONG).show();
               }
           })
           .setNegativeButton(R.string.cancel, new DialogInterface.OnClickListener() {
               public void onClick(DialogInterface dialog, int id) {
                   // User cancelled the dialog
               }
           });
    // Create the AlertDialog object and return it

    return builder.create();
}
}

in my activity i use this method:

public void confirmEvent(CharSequence text, int id) {
        DialogFragment mDialog = new MyDialogFragment();
        Bundle args = new Bundle();
        args.putCharSequence("text", text);
        args.getInt("id", id);

        mDialog.setArguments(args);
        mDialog.show(getSupportFragmentManager(), "missiles");
    }

this is my onItemclick :

@Override
            public void onItemClick(AdapterView<?> parent, View view, int position, long id){
                //String item = ((TextView)view).getText().toString();
                int img = ((ImageView)view.findViewById(R.id.event_pic)).getId();
                String txt =((TextView)view.findViewById(R.id.subTitle_single)).getText().toString();

                //Toast.makeText(Homepage.this,img , Toast.LENGTH_SHORT).show();
                //Toast.makeText(getApplicationContext(), text, Toast.LENGTH_SHORT).show();
                confirmEvent(txt, img);
            }

I really i didnt want to use Intents for this, but if that is the only way please let me know the best way to implement.

/////EDITED///

after changing to dialogImage.setImageResource ( as suggested in comments)

 View content = inflater.inflate(R.layout.dialogb, null);
    TextView dialogt = (TextView) content.findViewById(R.id.dialog_text);
    ImageView dialogImg = (ImageView)content.findViewById(R.id.dialog_pic);
    //dialogImg.setImageResource(getArguments().getImageResource(R.id.event_pic));
    dialogImg.setImageResource(getArguments().getInt("id"));
    //ImageView dialogImg2 = (ImageView)dialogt
    dialogt.setText(getArguments().getCharSequence("text"));
    builder.setView(content);
    builder.setMessage(R.string.dialog_Event)

my onitemclick:

public void onItemClick(AdapterView<?> parent, View view, int position, long id){
                //String item = ((TextView)view).getText().toString();
                int img = ((ImageView)view.getTag(R.id.event_pic)).getId();
                String txt =((TextView)view.findViewById(R.id.subTitle_single)).getText().toString();

                //Toast.makeText(Homepage.this,img , Toast.LENGTH_SHORT).show();
                //Toast.makeText(getApplicationContext(), text, Toast.LENGTH_SHORT).show();
                confirmEvent(txt, img);

it now crashes when i click an item. if i am missing the image position, how do i put it into the code?

回答1:

Set the image location to the list item by setTag() method and in onItemClick method use view.getTag() method to get the location

Edited : In MyDialogFragment class you have to set the image resource. You have set only image id which won't work. Use diaolgImage.setImageResource('id of image /drawable of the image ')

回答2:

If you can get the image location, within onItemClick() method save the image path in SharedPreferences.

SharedPreferences shared=getSharedPreferences("app_name", Activity.MODE_PRIVATE);
shared.edit().putString("image_path", "path").commit();

Inside your dialog window you can retrieve it,

SharedPreferences shared=getSharedPreferences("app_name", Activity.MODE_PRIVATE);
String path=shared.getString("image_path", null);

Or else you can save it in cache,But beware when the device is low on internal storage space, Android may delete these cache files to recover space.

来源：https://stackoverflow.com/questions/22084529/how-to-pass-image-from-listview-item-to-a-dialog-box-without-the-use-of-an-inten