我有一个领域数据库对象,每个对象都有4个属性。在第一个活动中,我放置了一个Listview仅显示其中一个属性,即Event。单击任何显示的事件后,我要转到活动2(详细信息视图),该活动将显示与单击的事件相关联的所有其他3个属性。如何故意这样做,以及如何检索要在活动2中单独显示的所有属性?
public class Events extends RealmObject {
public String fileRef;
public String event;
public String venue;
public String date;
@Override
public String toString() {
return " \n Events{" +
"fileRef='" + fileRef + '\'' +
", parties='" + event + '\'' +
", \n court='" + venue + '\'' +
", courtAt='" + date + '\'' +
'}';
}
public String getFileRef() {
return fileRef;
}
public void setFileRef(String fileRef) {
this.fileRef = fileRef;
}
public String getEvent() {
return event;
}
public void setEvent(String event) {
this.event = event;
}
public String getVenue() {
return venue;
}
public void setVenue(String venue) {
this.venue = venue;
}
public String getDate() {
return date;
}
public void setCourtAt(String date) {
this.date = date;
}
}
下面的代码在第一个活动中。我所得到的只是传递一个属性,即事件。如何传递和检索Activity2中的所有属性?
public class AllEventActivity extends AppCompatActivity {
private ArrayAdapter adapter;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_all_events);
ListView list = (ListView) findViewById(R.id.listView);
Realm realm;
realm = Realm.getDefaultInstance();
RealmResults<Events> results = realm.where(Events.class).findAll();
ArrayList<String> rows = new ArrayList<>();
for (Events events : results)
{
rows.add(Events.event);
}
adapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, rows);
list.setAdapter(adapter);
list.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
String selectedEvent = parent.getItemAtPosition(position).toString();
Intent eventDetailIntent = new Intent(AllEventActivity.this, Activity2.class);
eventDetailIntent.putExtra("event", selectedEvent);
startActivity(eventDetailIntent);
}
});
}
下面是Activity2中的代码。我只是设法使烤面包片显示了事件。
public class Activity2 extends AppCompatActivity {
private String selectedEvent;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.event_detail);
selectedEvent = getIntent().getExtras().get("event").toString();
Toast.makeText(Activity2.this, selectedCase, Toast.LENGTH_LONG).show();
}
}
非常感谢您的回答。非常感谢。
答案 0 :(得分:0)
您可以使用Gson库,需要在gradle文件中添加导入才能使用它
使用Gson,您可以将Event转换为String
Gson gson = new Gson();
intent.putExtra("event", gson.toJson(selectedEvent));
您可以在Gson的下一个活动中获得对象
Gson gson = new Gson();
Events yourEvent = gson.fromJson(getIntent().getStringExtra("event"), Events.class);
答案 1 :(得分:0)
使用捆绑包,
public class Activity2 extends AppCompatActivity {
private String selectedEvent;
Bundle bundle;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.event_detail);
bundle = getIntent().getExtras();
if (bundle != null){
try {
String selectedEvent = bundle.getString("event");
}catch (Exception e){
e.printStackTrace();
}
}
}
}
答案 2 :(得分:0)
请使用以下代码: 我将事件模型的第一到第二活动传递给了
模型类
public class Events extends RealmObject implements Serializable {
public String fileRef;
public String event;
public String venue;
public String date;
@Override
public String toString() {
return " \n Events{" +
"fileRef='" + fileRef + '\'' +
", parties='" + event + '\'' +
", \n court='" + venue + '\'' +
", courtAt='" + date + '\'' +
'}';
}
public String getFileRef() {
return fileRef;
}
public void setFileRef(String fileRef) {
this.fileRef = fileRef;
}
public String getEvent() {
return event;
}
public void setEvent(String event) {
this.event = event;
}
public String getVenue() {
return venue;
}
public void setVenue(String venue) {
this.venue = venue;
}
public String getDate() {
return date;
}
public void setCourtAt(String date) {
this.date = date;
}
}
Liveview点击事件:
Intent eventDetailIntent = new Intent(AllEventActivity.this, Activity2.class);
eventDetailIntent.putExtra("event", results.get(position)); // Selected postion item
startActivity(eventDetailIntent);
在第二个活动中,您可以检索传递的模型数据。
Events eventModel = ( Events) getIntent().getSerializableExtra("event");
因此,您将把数据保存在eventModel对象中。现在您可以从该模型中获取数据并设置到您的TextViews
中。
像
textview1.setText(eventModel.getEvent())
textview2.setText(eventModel.getVenue())
textview3.setText(eventModel.getDate())
希望有帮助。