Android-JSON-PHP-MySQL远程连接问题

Question

我在一个必须处理MYSQL数据库的android项目上工作，应用程序在本地主机上正常工作，但是当我把php文件和数据库放在服务器上并尝试通过设备执行程序应用程序意外关闭，尽管我已经将我的java文件中的地址从localhost更改为服务器地址。

Answer 1

这里是我的代码：

公共类UserFunctions {

private JSONParser jsonParser; 


private static String registerURL = "http://192.168.1.74/android_login_api/"; 
private static String register_tag = "register"; 


// constructor 
public UserFunctions(){ 
    jsonParser = new JSONParser(); 
} 

public JSONObject registerUser(String name){ 
    // Building Parameters 
    List<NameValuePair> params = new ArrayList<NameValuePair>(); 
    params.add(new BasicNameValuePair("tag", register_tag)); 
    params.add(new BasicNameValuePair("name", name)); 

    // getting JSON Object 
    JSONObject json = jsonParser.getJSONFromUrl(registerURL, params); 
    // return json 
    return json; 
} 

}

JSON类：

public class JSONParser { 

static InputStream is = null; 
static JSONObject jObj = null; 
static String json = ""; 

// constructor 
public JSONParser() { 

} 

public JSONObject getJSONFromUrl(String url, List<NameValuePair> params) { 

    // Making HTTP request 
    try { 
     // defaultHttpClient 
     DefaultHttpClient httpClient = new DefaultHttpClient(); 
     HttpPost httpPost = new HttpPost(url); 
     httpPost.setEntity(new UrlEncodedFormEntity(params)); 

     HttpResponse httpResponse = httpClient.execute(httpPost); 
     HttpEntity httpEntity = httpResponse.getEntity(); 
     is = httpEntity.getContent(); 

    } catch (UnsupportedEncodingException e) { 
     e.printStackTrace(); 
    } catch (ClientProtocolException e) { 
     e.printStackTrace(); 
    } catch (IOException e) { 
     e.printStackTrace(); 
    } 

    try { 
     BufferedReader reader = new BufferedReader(new InputStreamReader(
       is, "iso-8859-1"), 8); 
     StringBuilder sb = new StringBuilder(); 
     String line = null; 
     while ((line = reader.readLine()) != null) { 
      sb.append(line + "\n"); 
     } 
     is.close(); 
     json = sb.toString(); 
     Log.e("JSON", json); 
    } catch (Exception e) { 
     Log.e("Buffer Error", "Error converting result " + e.toString()); 
    } 

    // try parse the string to a JSON object 
    try { 
     jObj = new JSONObject(json);    
    } catch (JSONException e) { 
     Log.e("JSON Parser", "Error parsing data " + e.toString()); 
    } 

    // return JSON String 
    return jObj; 

} 

}

的SQLite： 公共类数据库处理器扩展SQLiteOpenHelper {

// All Static variables 
// Database Version 
private static final int DATABASE_VERSION = 1; 

// Database Name 
private static final String DATABASE_NAME = "new1"; 

// Login table name 
private static final String TABLE_LOGIN = "login"; 

// Login Table Columns names 
private static final String KEY_ID = "id"; 
private static final String KEY_NAME = "name"; 
private static final String KEY_UID = "uid"; 
private static final String KEY_CREATED_AT = "created_at"; 

public DatabaseHandler(Context context) { 
    super(context, DATABASE_NAME, null, DATABASE_VERSION); 
} 

// Creating Tables 
@Override 
public void onCreate(SQLiteDatabase db) { 
    String CREATE_LOGIN_TABLE = "CREATE TABLE " + TABLE_LOGIN + "(" 
      + KEY_ID + " INTEGER PRIMARY KEY," 
      + KEY_NAME + " TEXT," 
      + KEY_UID + " TEXT," 
      + KEY_CREATED_AT + " TEXT" + ")"; 
    db.execSQL(CREATE_LOGIN_TABLE); 
} 

// Upgrading database 
@Override 
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) { 
    // Drop older table if existed 
    db.execSQL("DROP TABLE IF EXISTS " + TABLE_LOGIN); 

    // Create tables again 
    onCreate(db); 
} 

/** 
* Storing user details in database 
* */ 
public void addUser(String name, String uid, String created_at) { 
    SQLiteDatabase db = this.getWritableDatabase(); 

    ContentValues values = new ContentValues(); 
    values.put(KEY_NAME, name); // Name 
    values.put(KEY_UID, uid); // Email 
    values.put(KEY_CREATED_AT, created_at); // Created At 

    // Inserting Row 
    db.insert(TABLE_LOGIN, null, values); 
    db.close(); // Closing database connection 
} 

/** 
* Getting user data from database 
* */ 
public HashMap<String, String> getUserDetails(){ 
    HashMap<String,String> user = new HashMap<String,String>(); 
    String selectQuery = "SELECT * FROM " + TABLE_LOGIN; 

    SQLiteDatabase db = this.getReadableDatabase(); 
    Cursor cursor = db.rawQuery(selectQuery, null); 
    // Move to first row 
    cursor.moveToFirst(); 
    if(cursor.getCount() > 0){ 
     user.put("name", cursor.getString(1)); 
     user.put("uid", cursor.getString(2)); 
     user.put("created_at", cursor.getString(3)); 
    } 
    cursor.close(); 
    db.close(); 
    // return user 
    return user; 
} 

/** 
* Getting user login status 
* return true if rows are there in table 
* */ 
public int getRowCount() { 
    String countQuery = "SELECT * FROM " + TABLE_LOGIN; 
    SQLiteDatabase db = this.getReadableDatabase(); 
    Cursor cursor = db.rawQuery(countQuery, null); 
    int rowCount = cursor.getCount(); 
    db.close(); 
    cursor.close(); 

    // return row count 
    return rowCount; 
} 

/** 
* Re crate database 
* Delete all tables and create them again 
* */ 
public void resetTables(){ 
    SQLiteDatabase db = this.getWritableDatabase(); 
    // Delete All Rows 
    db.delete(TABLE_LOGIN, null, null); 
    db.close(); 
} 

}