Android 如何将多个数据从片段传递到活动
我正在尝试将listView项目转换为详细视图。该列表通过使用自定义适配器显示 这是我的列表片段Android 如何将多个数据从片段传递到活动,android,android-fragments,android-intent,Android,Android Fragments,Android Intent,我正在尝试将listView项目转换为详细视图。该列表通过使用自定义适配器显示 这是我的列表片段 import android.app.Fragment; import android.content.Intent; import android.os.Bundle; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup
import android.app.Fragment;
import android.content.Intent;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.ListView;
import android.widget.Toast;
import com.rupomkhondaker.sonalibank.adapter.PhoneListAdapter;
import com.rupomkhondaker.sonalibank.model.ContactItem;
import java.io.Serializable;
import java.util.ArrayList;
public class GMOFragment extends Fragment {
public GMOFragment(){}
private ArrayList<ContactItem> phoneItems;
private PhoneListAdapter adapters;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_gmo, container, false);
final ArrayList<ContactItem> listData = getListData();
final ListView listView = (ListView) rootView.findViewById(R.id.gmolistView);
listView.setAdapter(new PhoneListAdapter(getActivity(), listData));
listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> a, View v, int position, long id) {
ContactItem newsData = (ContactItem) listView.getItemAtPosition(position);
String names = (String) listView.getItemAtPosition(position);
String phones = (String) listView.getItemAtPosition(position);
String mobiles = (String) listView.getItemAtPosition(position);
String emails = (String) listView.getItemAtPosition(position);
Intent intent = new Intent(getActivity(), ContactDetail.class);
intent.putExtra("key", names);
intent.putExtra("key2", phones);
intent.putExtra("key3", mobiles);
intent.putExtra("key4", emails);
Toast.makeText(getActivity(), "Selected :" + " " + newsData, Toast.LENGTH_LONG).show();
startActivity(intent);
}
});
return rootView;
}
private ArrayList<ContactItem> getListData() {
ArrayList<ContactItem> listMockData = new ArrayList<ContactItem>();
String[] names = getResources().getStringArray(R.array.gmo_name_list);
String[] phones = getResources().getStringArray(R.array.gmo_ph_list);
String[] mobiles = getResources().getStringArray(R.array.gmo_mob_list);
String[] emails = getResources().getStringArray(R.array.gmo_email_list);
for (int i = 0; i < names.length; i++) {
ContactItem newsData = new ContactItem();
newsData.setName(names[i]);
newsData.setPhone(phones[i]);
newsData.setMobile(mobiles[i]);
newsData.setEmail(emails[i]);
listMockData.add(newsData);
}
return listMockData;
}
}
这是日志
09-27 19:05:21.762 629-629/? E/AndroidRuntime﹕ FATAL EXCEPTION: main
java.lang.ClassCastException: com.rupomkhondaker.sonalibank.model.ContactItem cannot be cast to java.lang.String
at com.rupomkhondaker.sonalibank.GMOFragment$1.onItemClick(GMOFragment.java:49)
at android.widget.AdapterView.performItemClick(AdapterView.java:298)
at android.widget.AbsListView.performItemClick(AbsListView.java:1086)
at android.widget.AbsListView$PerformClick.run(AbsListView.java:2859)
at android.widget.AbsListView$1.run(AbsListView.java:3533)
at android.os.Handler.handleCallback(Handler.java:615)
at android.os.Handler.dispatchMessage(Handler.java:92)
at android.os.Looper.loop(Looper.java:137)
at android.app.ActivityThread.main(ActivityThread.java:4745)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:511)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
at dalvik.system.NativeStart.main(Native Method)
09-27 19:05:21.782 150-517/? W/ActivityManager﹕ Force finishing activity com.rupomkhondaker.sonalibank/.MainActivity
09-27 19:05:21.892 150-517/? D/dalvikvm﹕ GC_FOR_ALLOC freed 93K, 10% free 11568K/12807K, paused 58ms, total 63ms
问题出现在这里:
String names = (String) listView.getItemAtPosition(position);
方法getItemAtPosition()
返回一个对象,即存储在适配器位置的对象。在您的情况下,此对象的动态类型为ContactItem
。要检索名称,可以使用如下内容(假设您已经为名称字段实现了getter):
不过,最好是将整个ContactItem
放在意图中。这要求ContactItem
为。那么您的代码将变成:
@Override
public void onItemClick(AdapterView<?> a, View v, int position, long id) {
ContactItem newsData = (ContactItem) listView.getItemAtPosition(position);
Intent intent = new Intent(getActivity(), ContactDetail.class);
intent.putExtra("key", newsData);
Toast.makeText(getActivity(), "Selected :" + " " + newsData, Toast.LENGTH_LONG).show();
startActivity(intent);
}
我不知道你指的是哪一部分HashMap
与Bundle
或Intent
截然不同ContactItem
似乎是您自己定义的一个类,但又不同了。哦!!事实上,我对安卓非常陌生,并尝试学习新事物。
String names = (String) listView.getItemAtPosition(position).getName();
@Override
public void onItemClick(AdapterView<?> a, View v, int position, long id) {
ContactItem newsData = (ContactItem) listView.getItemAtPosition(position);
Intent intent = new Intent(getActivity(), ContactDetail.class);
intent.putExtra("key", newsData);
Toast.makeText(getActivity(), "Selected :" + " " + newsData, Toast.LENGTH_LONG).show();
startActivity(intent);
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
this.setContentView(R.layout.view_contact);
TextView txtName = (TextView) findViewById(R.id.conName);
TextView txtPhone = (TextView) findViewById(R.id.conPhone);
TextView txtMobile = (TextView) findViewById(R.id.conMobile);
TextView txtEmail = (TextView) findViewById(R.id.conEmail);
Intent i = getIntent();
Bundle b = i.getExtras();
// getting attached intent data
ContactItem contact = (ContactItem) b.getSerializable("key");
// displaying selected contact name
txtName.setText(contact.getName());
txtPhone.setText(contact.getPhone());
txtMobile.setText(contact.getMobile());
txtEmail.setText(contact.getEmail());
}