返回按钮并刷新以前的活动

I would recommend overriding the onResume() method in activity number 1, and in there include code to refresh your array adapter, this is done by using [yourListViewAdapater].notifyDataSetChanged();

Read this if you are having trouble refreshing the list: Android List view refresh

If not handling a callback from the editing activity (with onActivityResult), then I'd rather put the logic you mentioned in onStart (or possibly in onRestart), since having it in onResume just seems like overkill, given that changes are only occurring after onStop.

At any rate, be familiar with the Activity lifecycle. Plus, take note of the onRestoreInstanceState and onSaveInstanceState methods, which do not appear in the pretty lifecycle diagram.

(Also, it's worth reviewing how the Notepad Tutorial handles what you're doing, though it does use a database.)

I think onRestart() works better for this.

@Override
public void onRestart() {
super.onRestart();
//When BACK BUTTON is pressed, the activity on the stack is restarted
//Do what you want on the refresh procedure here
}

You could code what you want to do when the Activity is restarted (called again from the event 'back button pressed') inside onRestart().

For example, if you want to do the same thing you do in onCreate(), paste the code in onRestart() (eg. reconstructing the UI with the updated values).

in main:

@Override
public void onRestart()
{
super.onRestart();
finish();
startActivity(getIntent());
}

The think best way to to it is using

Intent i = new Intent(this.myActivity, SecondActivity.class);
startActivityForResult(i, 1);

private Cursor getAllFavorites() {
return mDb.query(DocsDsctnContract.DocsDsctnEntry.Description_Table_Name,
null,
null,
null,
null,
null,
DocsDsctnContract.DocsDsctnEntry.COLUMN_Timest);
}
@Override
public void onResume()
{  // After a pause OR at startup
super.onResume();
mAdapter.swapCursor(getAllFavorites());
mAdapter.notifyDataSetChanged();


}


public void swapCursor(Cursor newCursor){
if (mCursor!=null) mCursor.close();
mCursor = newCursor;
if (newCursor != null){
mAdapter.notifyDataSetChanged();
}
}

I just have favorites category so when i click to the item from favorites there appear such information and if i unlike it - this item should be deleted from Favorites : for that i refresh database and set it to adapter(for recyclerview)[I wish you will understand my problem & solution]

If you want to refresh previous activity, this solution should work:

In previous activity where you want to refresh:

@Override
public void onRestart()
{
super.onRestart();
// do some stuff here
}

Try This

 public void refreshActivity() {
Intent i = new Intent(this, MainActivity.class);
i.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
startActivity(i);
finish();


}

or in Fragment

  public void refreshActivity() {
Intent i = new Intent(getActivity(), MainActivity.class);
i.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
startActivity(i);
finish();


}

And Add this method to your onBackPressed() like

  @Override
public void onBackPressed() {
refreshActivity();
super.onBackPressed();
}
}

Thats It...

@Override
public void onBackPressed() {
Intent intent = new Intent(this,DesiredActivity.class);
startActivity(intent);
super.onBackPressed();
}

 @Override
protected void onRestart() {
super.onRestart();
finish();
overridePendingTransition(0, 0);
startActivity(getIntent());
overridePendingTransition(0, 0);
}

In previous activity use this code. This will do a smooth transition and reload the activity when you come back by pressing back button.