Android中利用数据库查询电话归属地

1.首先将我们的归属地的数据库放入assets/address.db

2.然后需要将我们的数据库文件copy到

data/data/com.ittest.address/files/address.db

private void copyDB(String dbName) {//dbName文件名
File destFile = new File(getFilesDir(),dbName);
//System.out.println(getFilesDir());

if(destFile.exists()){//如果存在就不需要再次copy了
System.out.println("数据库已存在");
return;
}

InputStream in = null;
FileOutputStream out = null;
try {
in = getAssets().open(dbName);
out = new FileOutputStream(destFile);
int len = 0;
byte[] buffer = new byte[1024];

while((len = in.read(buffer))!= -1){
out.write(buffer,0,len);
}
} catch (IOException e) {
e.printStackTrace();
}finally{
try {
in.close();
out.close();
} catch (IOException e) {
e.printStackTrace();
}

}

}

3.创建一个AddressDao.java，进行数据库查询操作

手机匹配较为简略，但是大致能够覆盖，但是对于3位，4位号码由于缺少数据库的支持，所以只是写个大概，知道意思就行了。

public class AddressDao {

private static final String PATH = "data/data/com.ittest.address/files/address.db";// 注意该路径必须是data/data否则数据库访问不到

public static String getAddress(String number) {

String address = "未知号码";//默认
// 获取数据库对象
SQLiteDatabase database = SQLiteDatabase.openDatabase(PATH, null,
SQLiteDatabase.OPEN_READONLY);

// 数据号码特点：1+(3,4,5,6,7,8)+(1-9)
// 正则表达式
// ^1[3-8]\d{9}$
if (number.matches("^1[3-8]\\d{9}$")) {// 匹配手机号码
Cursor cursor = database
.rawQuery(
"select location from data2 where id=(select outkey from data1 where id=?)",
new String[] { number.substring(0, 7) });
if (cursor.moveToNext()) {
address = cursor.getString(0);
}
cursor.close();
} else if (number.matches("\\d+$")) {
switch (number.length()) {
case 3:
address = "报警电话";
break;
case 4:
address = "模拟器";
break;
case 5:
address = "客服电话";
break;
case 8:
address = "本地电话";
break;

default:
// 010-88881234
if (number.startsWith("0") && number.length() > 10) {
// 有些区号是4位，有些区号是3位
Cursor cursor = database.rawQuery(
"select location from data2 where area=?",
new String[] { number.substring(1, 4) });

if (cursor.moveToNext()) {
address = cursor.getString(0);
} else {
cursor = database.rawQuery(
"select location from data2 where area=?",
new String[] { number.substring(1, 3) });
if (cursor.moveToNext()) {
address = cursor.getString(0);
}
cursor.close();
}
break;
}
}

}
database.close();//关闭数据库
return address;
}

}

4.最后是我们的activity，只有EditText，Buttion，TextView这三个，布局文件略。

public class AddressQueryActivity extends Activity {

private EditText etQueryPhone;
private TextView tvQueryResult;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);

setContentView(R.layout.activity_address_query);

etQueryPhone = (EditText) findViewById(R.id.et_queryPhone);
tvQueryResult = (TextView) findViewById(R.id.tv_queryResult);

etQueryPhone.addTextChangedListener(new TextWatcher() {//etittext变化监听器，可以不让用户去点击按钮

@Override
public void onTextChanged(CharSequence s, int start, int before, int count) {
String address = AddressDao.getAddress(s.toString());
tvQueryResult.setText(address);
}

@Override
public void beforeTextChanged(CharSequence s, int start, int count,
int after) {

}

@Override
public void afterTextChanged(Editable s) {

}
});
}

public void query(View view) {
String phone = etQueryPhone.getText().toString().trim();

if (!TextUtils.isEmpty(phone)) {
String address = AddressDao.getAddress(phone);
tvQueryResult.setText(address);
}

}
}