Question

我有一个对话框，我用它在活动之间切换（当抛出错误时，排序）。我习惯使用Intent(this, class)来切换活动，但在DialogBox内容应该是什么，而不是“this”。

我的代码：

package com.example.partyorganiser;

import android.app.Activity;
import android.app.AlertDialog;
import android.app.Dialog;
import android.app.DialogFragment;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.os.Bundle;

public class Attendance_Dialog extends DialogFragment {
    Context context;
     public Attendance_Dialog(Context c){
         this.context = c;
     }
     public Dialog onCreateDialog(Bundle savedInstanceState, final Context context) {
            // Use the Builder class for convenient dialog construction
            AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
            builder.setMessage("NEED TO CREATE A PARTY FIRST: MENU OR ADD A PARTY")
                   .setPositiveButton("MENU", new DialogInterface.OnClickListener() {
                       public void onClick(DialogInterface dialog, int id) {
                          Intent switch_menu = new Intent(context, MenuList.class);
                       }
                   })
                   .setNegativeButton("ADD A PARTY", new DialogInterface.OnClickListener() {
                       public void onClick(DialogInterface dialog, int id) {
                           Intent switch_addparty = new Intent(context , AddParty.class);
                           startActivity(switch_addparty);
                       }
                   });
            // Create the AlertDialog object and return it
            return builder.create();
        }
}

Answer 1

将上下文传递给对话框。

public class MyDialog extends Dialog{
    Context context;
    //Constructor
    public MyDialog(Context c){
        this.context = c;
    }

    //Example of using the context
    public void doSomethingWithContext(){
        Intent i = new Intent(this, MyClass.class);
    }
} 

//Creating MyDialog and giving it a context
MyDialog md = new MyDialog(this);
md.show();

在片段中，您可以使用getActivity()从启动片段的活动中获取上下文。

在对话框中，上下文对于Intent（Context，Class）应该是什么？

1 个答案: