浅析Android手机卫士之号码归属地查询

select outkey from data1 where id=”前七位手机号”

select location from data2 where id=”上面查出的outkey”

select location from data2 where id=(select outkey from data1 where id=”前7位手机号”)

package com.qingguow.mobilesafe.utils;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
public class NumberQueryAddressUtil {
private static final String path = "/data/data/com.qingguow.mobilesafe/files/address.db";
/**
* 查询号码归属地
* @param phone
* @return
*/
public static String queryAddress(String phone){
SQLiteDatabase db=SQLiteDatabase.openDatabase(path, null,SQLiteDatabase.OPEN_READONLY);
Cursor cursor=db.rawQuery("select location from data2 where id=(select outkey from data1 where id=?)", new String[]{phone.substring(0,7)});
while(cursor.moveToNext()){
String address=cursor.getString(0);
return address;
}
cursor.close();
return "";
}
} 

private void copyAddressDatabase() {
try {
//判断是否存在
File file = new File(getFilesDir(), "address.db");
if (file.exists() && file.length() > 0) {
return;
}
InputStream is = getAssets().open("address.db");
FileOutputStream fos = new FileOutputStream(file);
byte[] buffer = new byte[1024];
int len = 0;
while ((len = is.read(buffer)) != -1) {
fos.write(buffer, 0, len);
}
is.close();
fos.close();
} catch (Exception e) {
e.printStackTrace();
}
}