Android 拨打电话、查询联系人

          布局文件

主代码EditText ed_number;Button btn_call, btn_sel;String number;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);this.requestWindowFeature(Window.FEATURE_NO_TITLE); // 去除标题栏setContentView(R.layout.activity_main);// 加载布局// 得到控件ed_number = (EditText) findViewById(R.id.ed_number);btn_call = (Button) findViewById(R.id.btn_call);number = ed_number.getText().toString();btn_sel = (Button) findViewById(R.id.btn_sel);// 点击拨打电话btn_call.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View v) {// TODO Auto-generated method stub     // 用intent启动拨打电话 ACTION_DIAL点击拨打后才开始拨打，ACTION_CALL直接拨打     Intent mIntent = new Intent(Intent.ACTION_DIAL, Uri.parse("tel:" + number));     startActivity(mIntent);    } }); // 查看联系人btn_sel.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View v) {// TODO Auto-generated method stub   // 获取手机联系人    Cursor cursor = getContentResolver().query(    ContactsContract.CommonDataKinds.Phone.CONTENT_URI,null, null, null, null);    while (cursor.moveToNext()) {       // 得到联系人姓名       int indexPeopleName = cursor.getColumnIndex(Phone.DISPLAY_NAME);      // 得到联系人电话      int indexPhoneNum = cursor.getColumnIndex(Phone.NUMBER);      String strPeopleName = cursor.getString(indexPeopleName);      String strPhoneNum = cursor.getString(indexPhoneNum);      // 输出      System.out.println(strPeopleName + "    " + strPhoneNum);}  if (!cursor.isClosed()) {     cursor.close();     cursor = null;    } }});
}