警报对话框 - 如何？

Posted 2023-05-07

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【中文标题】警报对话框 - 如何？【英文标题】：Alert Dialog Box - how to? 【发布时间】：2018-08-27 23:11:10 【问题描述】：

在我的项目中。我正在使用两个警报对话框。私有方法中使用的两个警报对话框。私有方法是checkIn( ) 和checkOut( )

在主要活动中，我有一个按钮。按钮的两个功能。一个功能是签入，另一个功能是签出。

当我进入 Activity 时，按钮在 Check-in 中可见。如果我单击按钮。它变为 Check out 并显示 Alert Dialogue checkIn( ) 私有方法。

如果我刷新 Activity 它将变为签入。当我刷新活动时，我的问题是如何获得结帐操作。任何人都可以解决并为此提供解决方案...

提前谢谢你。我附上了下面的示例代码

public class Insert_DataSql extends AppCompatActivity 


    private long UPDATE_INTERVAL = 2 * 1000;  /* 10 secs */
    private long FASTEST_INTERVAL = 2000; /* 2 sec */
    LocationRequest locationRequest;
    LocationManager locationManager;
    PreparedStatement preparedStatement;
    String formattedDate;
    WebConnection connectionClass;
    Button cin,cout;
    TextView dat,tim,adddre;
    Boolean flag=true;


    SharedPreferences sharedPreferences;
    String username;

    @Override
    protected void onCreate(@Nullable Bundle savedInstanceState) 
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_insertdata);
        connectionClass = new WebConnection();

        sharedPreferences=getSharedPreferences("LoginPref", Context.MODE_PRIVATE);//here we go getdata
        user name=sharedPreferences.getString("User name",null);

//Button Click able

cin.setOnClickListener(new View.OnClickListener() 
            @Override
            public void onClick(View view) 

                if (!locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER)) 
                    buildAlertMessageNoGps();

                 else if (locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER)) 


                    if (flag) 
                        getMyCurrentLocation();
                        CheckinButton();
                        flag =false;
                        Toast.makeText(Insert_DataSql.this, "True statement", Toast.LENGTH_SHORT).show();
                        dat.setText(date);
                        new Insert_data().execute("");//insert for button
                        //   tim.setText(formattedDate);

                    
                    else
                        flag =true;
                        getMyCurrentLocation();
                        CheckoutButton();
                        Toast.makeText(Insert_DataSql.this, "Wrong statement", Toast.LENGTH_SHORT).show();
                        dat.setText(date);
                        new Insert_data().execute("");
                        // tim.setText(formattedDate);

//警报对话框的私有方法

      private void CheckoutButton() 
        if(flag == false )
            cin .setText("Check Out Sucessfull");
            AlertDialog alertDialog = new AlertDialog.Builder(
                    Insert_DataSql.this).create();
            alertDialog.setTitle("Check Out Sucessfully");
            alertDialog.setMessage(adddre.getText());
            alertDialog.setIcon(R.drawable.ic_access_time_black_24dp);
            alertDialog.setButton("OK", new DialogInterface.OnClickListener() 
                public void onClick(DialogInterface dialog, int which) 
                    Toast.makeText(getApplicationContext(), "You clicked on OK", Toast.LENGTH_SHORT).show();
                
            );
            alertDialog.show();
        

    

    private void CheckinButton() 
        if(flag == true )
            cin.setText("Check Out");
            AlertDialog alertDialog = new AlertDialog.Builder(
                    Insert_DataSql.this).create();
            alertDialog.setTitle("Check In Sucessfully");
            alertDialog.setMessage("Have A Nice Day");
            alertDialog.setIcon(R.drawable.ic_access_time_black_24dp);
            alertDialog.setButton("OK", new DialogInterface.OnClickListener() 
                public void onClick(DialogInterface dialog, int which) 
                    Toast.makeText(getApplicationContext(), "You clicked on OK", Toast.LENGTH_SHORT).show();
                
            );
            alertDialog.show();

【问题讨论】：

【参考方案1】：

试试这样的：

定义这些变量：

    public static final String PREF_FLAG = "FLAG";
    private static String COUT = "cout";
    private static String CIN = "cin";
    private static String defaultFlagValue = COUT;

并添加这些方法：

    private String getFlag() 
        return sharedPreferences.getString(PREF_FLAG, defaultFlagValue);
    

    private void setFlag(String flag) 
        SharedPreferences.Editor editor = sharedPreferences.edit();
        editor.putString(PREF_FLAG, flag);
        editor.apply();

并更新您的代码：

private void CheckinButton() 
        if (getFlag() == COUT) 

            ...

            setFlag(CIN);
        

    

private void CheckoutButton() 
        if (getFlag() == CIN) 

            ...

            setFlag(COUT);

最后更新游览onClick函数

cin.setOnClickListener(new View.OnClickListener() 
        @Override
        public void onClick(View view) 

            if (!locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER)) 
                buildAlertMessageNoGps();

             else if (locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER)) 


                if (getFlag() == CIN) 
                    getMyCurrentLocation();
                    CheckinButton();
                    Toast.makeText(Insert_DataSql.this, "True statement", Toast.LENGTH_SHORT).show();
                    dat.setText(date);
                    new Insert_data().execute("");//insert for button
                    //   tim.setText(formattedDate);

                
                else

                    getMyCurrentLocation();
                    CheckoutButton();
                    Toast.makeText(Insert_DataSql.this, "Wrong statement", Toast.LENGTH_SHORT).show();
                    dat.setText(date);
                    new Insert_data().execute("");
                    // tim.setText(formattedDate);