我在 android 中有代码，它在列表中获取联系人，其中包含列表的每个项目一个复选框。现在我想在屏幕底部添加一个按钮来执行一些操作。但是当我添加按钮时，它与列表的每个项目一起显示。我只希望它在底部一次。这是我的活动。
package com.exercise.me;
import java.util.ArrayList;
import android.app.ListActivity;
import android.app.ProgressDialog;
import android.content.Context;
import android.database.Cursor;
import android.os.Bundle;
import android.provider.ContactsContract;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.CompoundButton;
import android.widget.CompoundButton.OnCheckedChangeListener;
import android.widget.ListView;
public class ContactList extends ListActivity {
/** Called when the activity is first created. */
private ArrayList<contact> contact_list = null;
private ProgressDialog mProgressDialog = null;
private contactAdapter mContactAdapter = null;
private Runnable mViewcontacts = null;
//final Button btnPost = (Button)this.findViewById(R.id.btnPost);
private ArrayList<contact> items;
boolean[] isChecked;
Cursor mCursor;
ListView lv;
CheckBox cb;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.listview);
contact_list = new ArrayList<contact>();
lv = getListView();
mViewcontacts = new Runnable() {
public void run() {
getContacts();
}
};
Thread thread = new Thread(null, mViewcontacts, "ContactReadBackground");
thread.start();
mProgressDialog = ProgressDialog.show(ContactList.this, "Please Wait...", "Retriving Contacts...", true);
}
@SuppressWarnings("unused")
private void getContacts() {
try {
String[] projection = new String[] {
ContactsContract.Contacts.DISPLAY_NAME,
ContactsContract.Contacts.HAS_PHONE_NUMBER,
ContactsContract.Contacts._ID };
mCursor = managedQuery(ContactsContract.Contacts.CONTENT_URI,
projection, ContactsContract.Contacts.HAS_PHONE_NUMBER + "=?", new String[] { "1" },
ContactsContract.Contacts.DISPLAY_NAME);
while (mCursor.moveToNext()) {
contact contact = new contact();
String contactId = mCursor.getString(mCursor.getColumnIndex(ContactsContract.Contacts._ID));
contact.setContactName(mCursor.getString(mCursor.getColumnIndex(ContactsContract.Contacts.DISPLAY_NAME)));
contact_list.add(contact);
}
isChecked = new boolean[mCursor.getCount()];
for (int i = 0; i < isChecked.length; i++) {
isChecked[i] = false;
}
this.mContactAdapter = new contactAdapter(this, R.layout.listview, contact_list);
lv.setAdapter(this.mContactAdapter);
mCursor.close();
runOnUiThread(returnRes);
} catch (Exception e) {
Log.d("getContacts", e.getMessage());
}
}
public class contactAdapter extends ArrayAdapter<contact> {
public contactAdapter(Context context, int textViewResourceId, ArrayList<contact> items1) {
super(context, textViewResourceId, items1);
items = items1;
}
@Override
public View getView(final int position, View convertView, ViewGroup parent) {
LayoutInflater vi = (LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView = vi.inflate(R.layout.listview, parent, false);
cb = (CheckBox) convertView.findViewById(R.id.checkBox);
if (isChecked[position] == true)
cb.setChecked(true);
else
cb.setChecked(false);
cb.setOnCheckedChangeListener(new OnCheckedChangeListener() {
public void onCheckedChanged(CompoundButton buttonView, boolean ischecked) {
if (buttonView.isChecked())
isChecked[position] = true;
else
isChecked[position] = false;
}
});
contact contacts = items.get(position);
if (contacts != null) {
if (cb != null) {
cb.setText(contacts.getContactName());
}
}
return convertView;
}
}
private Runnable returnRes = new Runnable() {
public void run() {
if (mProgressDialog.isShowing())
mProgressDialog.dismiss();
mContactAdapter.notifyDataSetChanged();
}
};
}
这是它的xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="horizontal" >
<CheckBox
android:id="@+id/checkBox"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:layout_marginLeft="14dp"
android:textSize="25sp" />
<ListView
android:id="@android:id/list"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true" >
</ListView>
</RelativeLayout>
请告诉我如何在屏幕底部添加单曲。通过单击该单个按钮，我可以使用 HTTP 发布在服务器上发布所有选中的项目。