java - 使用复选框过滤联系人并获取电话号码

Question

我正在开发一款与所有 Android 手机上的默认短信应用类似的应用。我的问题是选择多个用户向其发送 SMS 消息。到目前为止我所做的是将我的联系人存储为带有复选框的 ListView 项目。现在我只需要从选定的联系人中获取电话号码。

那么我在做什么方面遇到了麻烦。1)从 ListView 中显示的联系人中提取电话号码2)在新 Activity 的 TextView 中显示该数字

抱歉，如果我的代码难以理解，请询问您是否需要澄清。

这是显示 ListView 的 XML，称为 contact_manager.xml:

 <?xml version="1.0" encoding="utf-8"?>
    <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:orientation="vertical" >

        <ListView
            android:id="@+id/contactList"
            android:layout_width="fill_parent"
            android:layout_height="0dp"
            android:layout_weight="1" />

        <Button
            android:id="@+id/showInvisible"
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:text="@string/showInvisible" />

    </LinearLayout>

这是我的 Activity，它将所有内容组合在一起。

public final class ContactManager extends Activity {

public static final String TAG = "ContactManager";

private ListView mContactList;
private boolean mShowInvisible;
private Button mShowInvisibleControl;

/**
 * Called when the activity is first created. Responsible for initializing
 * the UI.
 */
@Override
public void onCreate(Bundle savedInstanceState) {
    Log.v(TAG, "Activity State: onCreate()");
    super.onCreate(savedInstanceState);
    setContentView(R.layout.contact_manager);

    // Obtain handles to UI objects

    mContactList = (ListView) findViewById(R.id.contactList);
    mShowInvisibleControl = (Button) findViewById(R.id.showInvisible);

    // Initialize class properties
    mShowInvisible = false;
    // mShowInvisibleControl.setChecked(mShowInvisible);
    mShowInvisibleControl.setOnClickListener(new View.OnClickListener() {
        public void onClick(View view) {

        }
    });
    populateContactList();
}

/**
 * Populate the contact list based on account currently selected in the
 * account spinner.
 */
private void populateContactList() {
    // Build adapter with contact entries
    Cursor cursor = getContacts();
    String[] fields = new String[] { ContactsContract.Data.DISPLAY_NAME };
    SimpleCursorAdapter adapter = new SimpleCursorAdapter(this,
            R.layout.contact_entry, cursor, fields,
            new int[] { R.id.contactEntryText });
    mContactList.setAdapter(adapter);
}

/**
 * Obtains the contact list for the currently selected account.
 * 
 * @return A cursor for for accessing the contact list.
 */
private Cursor getContacts() {
    // Run query
    Uri uri = ContactsContract.Contacts.CONTENT_URI;
    String[] projection = new String[] { ContactsContract.Contacts._ID,
            ContactsContract.Contacts.DISPLAY_NAME };
    String selection = ContactsContract.Contacts.IN_VISIBLE_GROUP + " = '"
            + (mShowInvisible ? "0" : "1") + "'";
    String[] selectionArgs = null;
    String sortOrder = ContactsContract.Contacts.DISPLAY_NAME
            + " COLLATE LOCALIZED ASC";

    return managedQuery(uri, projection, selection, selectionArgs,
            sortOrder);
}

contact_entry.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" >

    <CheckBox
        android:id="@+id/contactEntryText"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@+id/contactEntryText" />

</LinearLayout>

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >

    <ListView
        android:id="@+id/contactList"
        android:layout_width="fill_parent"
        android:layout_height="0dp"
        android:layout_weight="1" />

    <Button
        android:id="@+id/showInvisible"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="@string/showInvisible" />

</LinearLayout>

这是我的 invite_text.xml 这实际上是我想输入数字的 TextView ，这样我就可以发送群发短信。

    <LinearLayout
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:orientation="vertical" >

        <RelativeLayout
            android:layout_width="fill_parent"
            android:layout_height="wrap_content" >

            <TextView
                android:id="@+id/contacts"
                android:layout_width="fill_parent"
                android:layout_height="wrap_content"
                android:layout_marginBottom="10dp"
                android:gravity="center"
                android:paddingBottom="10dp"
                android:paddingLeft="10dp"
                android:paddingTop="10dp"
                android:text="@string/contacts"
                android:textAppearance="?android:attr/textAppearanceLarge" />
            <!-- android:textColor="#fff" android:background="@drawable/header" for header background -->

            <Button
                android:id="@+id/contactsButton"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_alignParentRight="true"
                android:layout_alignParentTop="true"
                android:text="@string/contacts" />
        </RelativeLayout>

        <TextView
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:text="@string/enter_contact"
            android:textAppearance="?android:attr/textAppearanceMedium" />

        <AutoCompleteTextView
            android:id="@+id/contactnumber"
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:hint="@string/to" >

            <requestFocus />
        </AutoCompleteTextView>

        <TextView
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:text="@string/message_to_send"
            android:textAppearance="?android:attr/textAppearanceMedium" />

        <EditText
            android:id="@+id/invite_text"
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:text="@string/message_join" />

        <Button
            android:id="@+id/sendtxt"
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:onClick="doLaunchContactPicker"
            android:text="@string/send_txt" />
    </LinearLayout>

</ScrollView>

如果您需要我发布更多信息，请询问。

Answer 1

我没有看过你的代码，但这是对我有用的机制:

1. 将 setOnCheckedChangeListener 放入您的复选框。

2. 如果 Checkbox 是 Checked 则将该联系人添加到 arraylist。

3. 如果CheckBox 未选中，则从arraylist 中删除该联系人。

4. 使用 startActivityForResult() 开始您的联系人列表 Activity 并覆盖 onActivityResult()。

5.在离开联系人 Activity 之前，设置您的 Intent 中选定的联系人。

6. 在您的 Activity 中接收选定的联系人。

7. 现在您已经选择了可以在 TextView 中显示的联系人。

注意:您需要为此使用自定义列表适配器:

自定义列表适配器:

public class YourAdapterName extends BaseAdapter{

private Context mContext;
private ArrayList<string> mValuestoShow;

/**
 * Constructor to be called to initialize adapter with values.
 * @param context
 * @param vector
 */
public YourAdapterName(Context context, ArrayList<string> contacts){
    mContext = context;
    mValuestoShow = contacts;
}

public int getCount() {
    if(null != mValuestoShow){
        return mValuestoShow.size();
    }
    return 0;
}

public Object getItem(int position) {
    if(position < mValuestoShow.size())
        return  mValuestoShow.get(position);
    else
        return null;
}

public long getItemId(int position) {
    return 0;
}

/**
 * This method can be override to enable/disable particular list row.
 */
@Override
public boolean isEnabled(int position) {
    //Write your code here......
    return super.isEnabled(position);
}

public View getView(final int position, View convertView, ViewGroup parent) {
        ViewHolder holder;
        if (convertView == null) {
            LayoutInflater li =(LayoutInflater)mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
            convertView = li.inflate(R.layout.contact_list_layout, null);
            holder = new ViewHolder();
            holder.name = (TextView)convertView.findViewById(R.id.name);
            holder.checkbox = (CheckBox)convertView.findViewById(R.id.checkbox);
            convertView.setTag(holder);
        }
        else {
            holder = (ViewHolder) convertView.getTag();
        }

        holder.name.setText(text goes here ....);

        holder.checkbox.setOnCheckedChangeListener(new CheckBox.OnCheckedChangeListener() {
            public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
                if ( isChecked )
                    //Add contact...
                else
                    //Remove contact.
            }
        });

        return convertView;
    }

    class ViewHolder {
        TextView name;
        CheckBox checkbox;
    }

}

your_layout.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:padding="10dp" >

    <TextView
        android:id="@+id/name"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerVertical="true"
        android:layout_marginLeft="10dp"
        android:layout_marginRight="50dp"
        android:ellipsize="end"
        android:singleLine="true"
        android:textColor="@android:color/black" />

    <CheckBox
        android:id="@+id/checkbox"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentRight="true"
        android:layout_centerVertical="true" />

</RelativeLayout>