android - 使用 Intent.FLAG_ACTIVITY_SINGLE_TOP 和 CLEAR_TOP 时没有通过额外功能

Question

doneButton.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {

            if(!imgUriList.isEmpty())
            {
                    Intent intent = new Intent(getBaseContext(), createAdActivity.class);
                    intent.setFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP|Intent.FLAG_ACTIVITY_CLEAR_TOP);
                    intent.putParcelableArrayListExtra(Intent.EXTRA_STREAM, imgUriList);
                    startActivity(intent);


            }
        }
    });

This is the code I have used in my second activity to send extras to the first activity.

I want to keep the first activity as it is when coming back from the second activity. Therefore I have used _SINGLE_TOP,CLEAR_TOP FLAGS.

Without the Flags it works well. But After using the extras extras become null. This is the Code I have used in my first activity.

 @Override
    protected void onResume() {
        super.onResume();
        Toast.makeText(this,"IN RESUME ",Toast.LENGTH_LONG).show();
        imageUris = getIntent().getParcelableArrayListExtra(Intent.EXTRA_STREAM);
        if(getIntent().hasExtra(Intent.EXTRA_STREAM)) {
            if (!imageUris.isEmpty()) {
                createAdViewPagerAdapter viewpager = new createAdViewPagerAdapter(this,imageUris);
                photoViewer.setAdapter(viewpager);
            }
        }
    }

Since the first activity also uses some extras sent from MainActivity I have overrides the onNewIntent()method as well.

@Override
protected void onNewIntent(Intent intent) {
    super.onNewIntent(intent);
}

Answer 1

使用 getIntent()，您将获得旧的 Intent，您需要处理 onNewIntent() 的 intent 参数。您可以使用 setIntent(intent) 它将更改 getIntent() 返回的 Intent 。要确保对 getIntent() 的任何进一步调用将返回最新的 Intent ，请使用 setIntent().

 @Override
protected void onNewIntent(Intent intent) {
    super.onNewIntent(intent);
    setIntent(intent);
   // Do further stuff here
}