我有一个领域数据库对象,每个对象有4个属性。在第一个活动中,我将Listview只显示其中一个属性,即Event。在单击任何一个显示的事件时,我想转到活动2(详细信息视图),它将显示与单击的事件关联的所有其他3个属性。如何使用intent执行此操作,如何检索要在Activity 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;
}
}
以下代码位于第1个活动中。我得到的只是通过一个属性,即事件。如何在Activity2中传递和检索所有属性?
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。我只是设法让toast显示事件。
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。非常感谢你。
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,您可以将事件转换为字符串
Gson gson = new Gson();
intent.putExtra("event", gson.toJson(selectedEvent));
你可以在Gson的下一个活动中获得你的对象
Gson gson = new Gson();
Events yourEvent = gson.fromJson(getIntent().getStringExtra("event"), Events.class);
使用捆绑,
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();
}
}
}
}
请使用以下代码:我将事件模型1传递给第2个活动
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点击活动:
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,您将在eventModel对象中获取数据。现在,您可以从该模型获取数据并设置为TextViews
。
喜欢
textview1.setText(eventModel.getEvent())
textview2.setText(eventModel.getVenue())
textview3.setText(eventModel.getDate())
希望能帮助到你。