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我想用複選框創建聯繫人列表。所以我必須選擇聯繫人發送羣組消息;我試過這個代碼，但它不起作用... 你能向我建議如何進一步獲取聯繫人列表。帶複選框的聯繫人列表，用於選擇羣組消息
MainActivity.java
package com.example.cont1;
import java.util.ArrayList;
import com.example.cont.MainActivity;
import com.example.listo1.Demo;
import com.example.listo1.R;
import android.os.AsyncTask;
import android.os.Bundle;
import android.provider.ContactsContract;
import android.app.Activity;
import android.app.ListActivity;
import android.app.ProgressDialog;
import android.content.ContentResolver;
import android.database.Cursor;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.Toast;
public class MainActivity extends ListActivity {
StringBuilder sb= new StringBuilder();
String str;
ListView tx;
private Contact selectedAdapter;
private ArrayList<String> list;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
class ast extends AsyncTask<String, Void, String> {
String name, phone;
ProgressDialog pd;
@Override
protected void onPreExecute() {
// TODO Auto-generated method stub
super.onPreExecute();
pd = ProgressDialog.show(MainActivity.this, "", "loading");
}
@Override
protected void onPostExecute(String result) {
// TODO Auto-generated method stub
super.onPostExecute(result);
pd.cancel();
ArrayAdapter<String> adapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_multiple_choice, str);
setListAdapter(adapter);
getListView().setChoiceMode(ListView.CHOICE_MODE_MULTIPLE);
//textDetail.setText(sb);
}
@Override
protected String doInBackground(String... params) {
// TODO Auto-generated method stub
ContentResolver cr = getContentResolver();
Cursor cur = cr.query(ContactsContract.Contacts.CONTENT_URI, null, null, null, null);
String phone = null;
if (cur.getCount() > 0) {
Cursor phones = getContentResolver().query(ContactsContract.CommonDataKinds.Phone.CONTENT_URI, null, null, null, null);
while (phones.moveToNext()) {
name = phones.getString(phones.getColumnIndex(ContactsContract.CommonDataKinds.Phone.DISPLAY_NAME));
phone = phones.getString(phones.getColumnIndex(ContactsContract.CommonDataKinds.Phone.NUMBER));
sb.append("\n " + name + "\n" + phone);
sb.append("\n............................\n");
str=sb.toString();
}
phones.close();
}
return null;
}
}
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
Toast.makeText(this, String.valueOf(getListView().getCheckedItemCount()), Toast.LENGTH_LONG).show();
return true;
}
}
Contact.java
package com.example.cont1;
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.TextView;
public class Contact extends ArrayAdapter {
private MainActivity list;
// used to keep selected position in ListView
private int selectedPos = -1; // init value for not-selected
private Context context;
private String[] values;
public Contact(Context context, String[] values) {
super(context, R.layout.activity_main, values);
this.context = context;
this.values = values;
}
public void setSelectedPosition(int pos){
selectedPos = pos;
// inform the view of this change
notifyDataSetChanged();
}
public int getSelectedPosition(){
return selectedPos;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
View v = convertView;
LayoutInflater vi = (LayoutInflater) this.getContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
v = vi.inflate(R.layout.activity_main, null);
// get text view
TextView label = (TextView)v.findViewById(R.id.textView1);
ImageView btn=(ImageView)v.findViewById(R.id.icon);
if (convertView == null) {
v = vi.inflate(R.layout.activity_main, parent, false);
}
else
v = convertView;
TextView text1 = (TextView) v.findViewById(R.id.textView1);
text1.setText(values[position]);
LinearLayout layout_item = (LinearLayout) v.findViewById(R.id.linear);
//Set the background and text color
if (position % 2 == 0) {
layout_item.setBackgroundColor(context.getResources().getColor(R.color.black));
text1.setTextColor(context.getResources().getColor(R.color.white));
} else {
layout_item.setBackgroundColor(context.getResources().getColor(R.color.white));
text1.setTextColor(context.getResources().getColor(R.color.black));
}
return v;
}
}
activity_main.xml中
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context=".MainActivity">
<ScrollView
android:layout_width="wrap_content"
android:layout_height="wrap_content">
<LinearLayout
android:id="@+id/linear"
android:layout_width="wrap_content"
android:layout_height="wrap_content">
<TextView
android:id="@+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:layout_margin="10dp"/>
<ImageView
android:id="@+id/icon"
android:layout_width="22px"
android:layout_height="22px"
android:layout_marginLeft="4px"
android:layout_marginRight="10px"
android:layout_marginTop="4px">
</ImageView>
</LinearLayout>
</ScrollView>
</LinearLayout>
rowLayout.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="wrap_content"
android:layout_height="wrap_content" >
<ListView
android:id="@+id/list"
android:layout_height="match_parent"
android:layout_width="match_parent"/>
</LinearLayout>
現在的問題是什麼？ –
說大量的代碼「不起作用」並不能告訴我們問題是什麼。請更新問題以解釋代碼現在做什麼，你想要做什麼，以及你已經嘗試過什麼其他的事情，使它做你想做的事情。問題中的代碼太多，我們無法嘗試確定問題所在。 – AdrianHHH
我在textview中檢索姓名和電話號碼。但我想在列表視圖中獲取這些號碼，選擇多個號碼，並一次發送郵件給那些選定的號碼。所以我的主要動機是現在選擇來自listview的多個聯繫人。 – Himani