在ListView这里，我的所有联系人都有复选框。当我从列表中选择2个联系人并点击一个按钮时，所选列表的值应显示在下一个活动中。我怎样才能做到这一点？
我的活动类：
public class ContactListActivity extends Activity implements OnItemClickListener {
private ListView listView;
private List<ContactBean> list = new ArrayList<ContactBean>();
@SuppressWarnings("deprecation")
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
listView = (ListView) findViewById(R.id.list);
listView.setOnItemClickListener(this);
Cursor phones = getContentResolver().query(ContactsContract.CommonDataKinds.Phone.CONTENT_URI, null, null, null, null);
while (phones.moveToNext()) {
String name = phones.getString(phones.getColumnIndex(ContactsContract.CommonDataKinds.Phone.DISPLAY_NAME));
String phoneNumber = phones.getString(phones.getColumnIndex(ContactsContract.CommonDataKinds.Phone.NUMBER));
ContactBean objContact = new ContactBean();
objContact.setName(name);
objContact.setPhoneNo(phoneNumber);
list.add(objContact);
}
phones.close();
ContanctAdapter objAdapter = new ContanctAdapter(ContactListActivity.this, R.layout.alluser_row, list);
listView.setAdapter(objAdapter);
if (null != list && list.size() != 0) {
Collections.sort(list, new Comparator<ContactBean>() {
@Override
public int compare(ContactBean lhs, ContactBean rhs) {
return lhs.getName().compareTo(rhs.getName());
}
});
AlertDialog alert = new AlertDialog.Builder(ContactListActivity.this).create();
alert.setTitle("");
alert.setMessage(list.size() + " Contact Found!!!");
alert.setButton("OK", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
dialog.dismiss();
}
});
alert.show();
} else {
showToast("No Contact Found!!!");
}
}
private void showToast(String msg) {
Toast.makeText(this, msg, Toast.LENGTH_SHORT).show();
}
@Override
public void onItemClick(AdapterView<?> listview, View v, int position, long id) {
ContactBean bean = (ContactBean) listview.getItemAtPosition(position);
showCallDialog(bean.getName(), bean.getPhoneNo());
}
private void showCallDialog(String name, final String phoneNo) {
AlertDialog alert = new AlertDialog.Builder(ContactListActivity.this).create();
alert.setTitle("Call?");
alert.setMessage("Are you sure want to call " + name + " ?");
alert.setButton("No", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
dialog.dismiss();
}
});
alert.setButton2("Yes", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
String phoneNumber = "tel:" + phoneNo;
Intent intent = new Intent(Intent.ACTION_CALL, Uri.parse(phoneNumber));
startActivity(intent);
}
});
alert.show();
}
我的要保留数据的适配器类
public class ContanctAdapter extends ArrayAdapter<ContactBean> {
private Activity activity;
private List<ContactBean> items;
private int row;
private LayoutInflater inflater = null;
public ContanctAdapter(Activity act, int row, List<ContactBean> items) {
super(act, row, items);
this.activity = act;
this.row = row;
this.items = items;
this.inflater = (LayoutInflater) activity.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}
@Override
public View getView(final int position, View convertView, ViewGroup parent) {
ViewHolder holder;
if (convertView == null) {
holder = new ViewHolder();
convertView = inflater.inflate(row, null);
holder.tvname = (TextView) convertView.findViewById(R.id.tvname);
holder.tvPhoneNo = (TextView) convertView.findViewById(R.id.tvphone);
holder.checkbox = (ImageView) convertView.findViewById(R.id.img_checkbox);
convertView.setTag(holder);
} else {
holder = (ViewHolder) convertView.getTag();
}
if ((items == null) || ((position + 1) > items.size()))
return convertView;
ContactBean objBean = items.get(position);
holder.checkbox.setSelected((objBean.getIsSelected() == 1) ? true : false);
if (holder.tvname != null && null != objBean.getName() && objBean.getName().trim().length() > 0) {
holder.tvname.setText(Html.fromHtml(objBean.getName()));
}
if (holder.tvPhoneNo != null && null != objBean.getPhoneNo() && objBean.getPhoneNo().trim().length() > 0) {
holder.tvPhoneNo.setText(Html.fromHtml(objBean.getPhoneNo()));
}
holder.checkbox.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
items.get(position).isSelected = (v.isSelected()) ? 0 : 1;
notifyDataSetChanged();
}
});
return convertView;
}
public class ViewHolder {
public TextView tvname, tvPhoneNo;
private ImageView checkbox;
}
}
答案 0 :(得分：2)
有多种方法可以实现这一目标：
方法1：
使用静态类setter和getter方法：
创建静态类并从第一个活动设置值并从第二个活动中获取值
方法2：
通过意图发布你的价值
方法3：
使用数据库存储来自一个活动的数据并从其他活动中获取数据
方法4：
使用共享偏好
示例：
使用Intent like this
发布值 中发布值 的另一个教程答案 1 :(得分：0)
试试这个，它可以帮到你
在onitemClicklistener Listview页面中添加此代码
@Override
public void onItemClick(AdapterView<?> arg0, View view, int position,
long id) {
String TVNameitem = ((TextView) view.findViewById(R.id.tvname)).getText().toString();
String TVPhoneitem = ((TextView) view.findViewById(R.id.tvphone)).getText().toString();
Intent intent1 = new Intent(this,NextActivity.class);
intent1.putExtra("STRING_I_NEED_From_TVNAME", TVNameitem );
intent1.putExtra("STRING_I_NEED_From_TVPHONE",TVPhoneitem );
startActivity(intent1);
}
在Nextactivty Oncreate中获取值，然后在Textview中显示
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.find);
Bundle extras = getIntent().getExtras();
String VALUE_1= extras.getString("STRING_I_NEED_From_TVNAME");
String Value_2 =extras.getString("STRING_I_NEED_From_TVPHONE");
TextView Textview1=(TextView)findViewById(R.id.CompanyText);
Textview1.setText(VALUE_1+":"+Value_2);
}
答案 2 :(得分：0)
创建getter和setter以共享联系人详细信息。
public class GetContacts {
private String contactNumber;
private String contactName;
GetContacts(){}// constructor without parameter.
public String getContactNumber() {
return contactNumber;
}
public void setContactNumber(String contactNumber) {
this.contactNumber = contactNumber;
}
public String getContactName() {
return contactName;
}
public void setContactName(String contactName) {
this.contactName = contactName;
}
}
现在将联系人值设置为GetContact类
中的setter在第一个Activity中创建一个GetContact类的实例。
GetContact getContact= new GetContact();
并设置参数。
getContact.setContactNumber(phoneNumber);
getContact.setContactName(name);
现在是时候在第二个活动中获取这些值了。 像你之前一样在你的第二个Activity中创建一个GetContact类的实例。
获取参数，并显示到TextView。
textView1.setText(getContact.getContactNumber(phoneNumber));
textView2.setText(getContact.getContactName(name));