android2.2根据电话号码查询联系人姓名的方法

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 public class AndroidTest extends Activity {
     private static final String TAG = "AndroidTest";

     private TextView m_TextView;
     private EditText m_EditText;

     private String mNumber;

     @Override
     public void onCreate(Bundle savedInstanceState){
         super.onCreate(savedInstanceState);
         setContentView(R.layout.main);

         m_TextView = (TextView) findViewById(R.id.TextView01);
         m_EditText = (EditText) findViewById(R.id.EditText01);

         m_TextView.setTextSize(20);
         /**
         * 设置当m_EditText中为空时提示的内容
         * 在XML中同样可以实现：android:hint="请输入账号"
         */
         m_EditText.setHint("请输入账号");

         /* 设置EditText事件监听 */
         m_EditText.setOnKeyListener(new EditText.OnKeyListener() {
         public boolean onKey(View arg0, int arg1, KeyEvent arg2)
         {
             // TODO Auto-generated method stub
             // 得到文字，将其显示到TextView中
 //          m_TextView.setText("文本框中内容是：" + m_EditText.getText().toString());
             return false;
         }
         });

         m_EditText.setOnFocusChangeListener(new OnFocusChangeListener() {

             public void onFocusChange(View v, boolean hasFocus) {
                 // TODO Auto-generated method stub
                 mNumber = ((EditText)v).getText().toString();
                 Log.d(TAG, "mNumber = " + mNumber);
                 getPeople();
             }

         });

         m_EditText.addTextChangedListener(new TextWatcher() {

             public void afterTextChanged(Editable s) {
                 // TODO Auto-generated method stub

             }

             public void beforeTextChanged(CharSequence s, int start, int count,
                     int after) {
                 // TODO Auto-generated method stub

             }

             public void onTextChanged(CharSequence s, int start, int before,
                     int count) {
                 // TODO Auto-generated method stub
                 // 得到文字，将其显示到TextView中
                 m_TextView.setText("文本框中内容是：" + m_EditText.getText().toString());
             }

         });
     }

     /*
      * 根据电话号码取得联系人姓名
      */
     public void getPeople() {
         String[] projection = { ContactsContract.PhoneLookup.DISPLAY_NAME,
                                 ContactsContract.CommonDataKinds.Phone.NUMBER};

         Log.d(TAG, "getPeople ---------");

         // 将自己添加到 msPeers 中
         Cursor cursor = this.getContentResolver().query(
                 ContactsContract.CommonDataKinds.Phone.CONTENT_URI,
                 projection,    // Which columns to return.
                 ContactsContract.CommonDataKinds.Phone.NUMBER + " = '" + mNumber + "'", // WHERE clause.
                 null,          // WHERE clause value substitution
                 null);   // Sort order.

         if( cursor == null ) {
             Log.d(TAG, "getPeople null");
             return;
         }
         Log.d(TAG, "getPeople cursor.getCount() = " + cursor.getCount());
         for( int i = 0; i < cursor.getCount(); i++ )
         {
             cursor.moveToPosition(i);

             // 取得联系人名字
             int nameFieldColumnIndex = cursor.getColumnIndex(ContactsContract.PhoneLookup.DISPLAY_NAME);
             String name = cursor.getString(nameFieldColumnIndex);
             Log.i("Contacts", "" + name + " .... " + nameFieldColumnIndex); // 这里提示 force close
             m_TextView.setText("联系人姓名：" + name);
         }
     }

 }