如何在一个活动中将图像从ImageView发送到另一个活动中的ImageButton。 Android Studio

Question

I am trying to modify an image of an ImageView in one activity using a spinner, and then send that image to an ImageButton in another activity.

Here is the code of the ImageView activity:

    imgView = (ImageView) findViewById(R.id.imgView);
    spinner = (Spinner) findViewById(R.id.spinner);
    spinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
        @Override
        public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
            Intent imgIntent = getIntent();

            switch (position) {
                case 0:
                    imgView.setImageResource(R.drawable.brown);
                    imgIntent.putExtra("image", R.drawable.brown);
                    break;

                case 1:
                    imgView.setImageResource(R.drawable.blue);
                    imgIntent.putExtra("image", R.drawable.blue);
                    break;

                case 2:
                    imgView.setImageResource(R.drawable.black);
                    imgIntent.putExtra("image", R.drawable.black);
                    break;

                case 3:
                    imgView.setImageResource(R.drawable.white);
                    imgIntent.putExtra("image", R.drawable.white);
                    break;

                default:
                    imgView.setImageResource(R.drawable.brown);
                    imgIntent.putExtra("image", R.drawable.brown);
                    break;
            }

        }

        @Override
        public void onNothingSelected(AdapterView<?> parent) {

        }
    });

Here is the code of the ImageButton activity:

    ImageButton imgBtn = (ImageButton) findViewById(R.id.imgBtn);
    Intent imgIntent = getIntent();
    imgBtn.setImageResource(imgIntent.getIntExtra("image"));

I cannot figure out how to do this.

Full code of MainActivity:

public class MainActivity extends AppCompatActivity {

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    ImageButton imgBtn = (ImageButton) findViewById(R.id.imgBtn);
    Intent imgIntent = getIntent();
    imgBtn.setImageResource(imgIntent.getIntExtra("image", 0));
    startActivity(imgIntent);

    imgBtn.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            Intent intent = new Intent(getApplicationContext(), CustomizeDoggo.class);
            startActivity(intent);


        }
    });
}

}

Answer 1

just change this line.You haven't passed the default value

imgBtn.setImageResource(imgIntent.getIntExtra("image",0));

and u haven't started the activity

startActivity(mIntent);

UPDATE
Start an intent like this

//This line is missing in your code 
Intent intent = new Intent(CurrentActivity.this,ActivityToOpen.class);
intent.putExtra("image",id of selected image);
startActivity(intent);

Answer 2

在dest Activity中：在onCreate()方法中调用getArgurment()以获取包，然后在getIntExtra("image",default value);

Answer 3

wait try this will surely work

In main activity while starting new activity use this code instead of yours

Intent=new Intent(mContext,SecondActivity.class);
intent.putExtra("image",R.drawable.blue);
startActivity(intent);

now in second activity in oncreate use this code

int image=getIntent().getExtras().getInt("image",0);
mPlayPauseImageButton.setImageResource(image);