![](/img/trans.png)
[英]Passing an object from the 2nd activity back to main activity using serializable in android
[英]Passing ArrayList<Object> back to main Activity (Android)
我有一個ArrayList <Object>,其中Object是我制作的類的實例。 我想將此新數組列表傳遞回主活動,以將其放入NavigationDrawer項中。
如何將ArrayList <Object>從一項活動傳遞回主要活動?
我嘗試了bundle.getParcelableArrayList,但是它告訴我“類型參數T的推斷類型對象不在其范圍之內,應該實現android.os.parcelable”
這是我的代碼:
public void createPlaylist(String playlistName, ArrayList<Song> newPlaylistSongsArray) {
Intent returnIntent = new Intent();
Bundle b = new Bundle();
b.putParcelableArrayList("array", (ArrayList<? extends Parcelable>) newPlaylistSongsArray);
returnIntent.putExtra("playListName", playlistName);
returnIntent.putExtra("array", newPlaylistSongsArray);
setResult(Activity.RESULT_OK,returnIntent);
finish();
}
和:
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (requestCode == 1) {
if (resultCode == Activity.RESULT_OK){
String newPlaylistName = data.getStringExtra("playListName");
Bundle b = getIntent().getExtras();
final ArrayList<Song> newPlaylist = b.getParcelableArrayList("array");
Toast.makeText(MP3Player.this, "New Playlist Created", Toast.LENGTH_LONG).show();
}
if (resultCode == Activity.RESULT_CANCELED) {
Toast.makeText(MP3Player.this, "Shit went wrong yo!", Toast.LENGTH_LONG).show();
}
}
}
最簡單的方法是,您的Song類需要實現Serializable。
Bundle bundle = new Bundle();
bundle.putSerializable("newPlaylist", newPlaylist);
intent.putExtras(bundle);
在其他活動中:
Intent intent = this.getIntent();
Bundle bundle = intent.getExtras();
ArrayList<Song> newPlaylist=
(ArrayList<Song>)bundle.getSerializable("newPlaylist");
聲明:本站的技術帖子網頁,遵循CC BY-SA 4.0協議,如果您需要轉載,請注明本站網址或者原文地址。任何問題請咨詢:yoyou2525@163.com.