Android 如何从自定义FirebaseListAdapter类调用mainActivity中的静态方法？

我想使用Firebase从ChatListAdapter类在mainActivity中弹出一个警报视图

问题/错误：

public class ChatListAdapter extends FirebaseListAdapter<Chat> {

...

protected void populateView(View view, Chat chat) {
...    
    MainActivity.displayAmountPopup();
}

public static void displayAmountPopup(){

....

    new AlertDialog.Builder(MainActivity.this)
            .setTitle(strTitle)
            .setMessage(strAmountMessage)
            .setPositiveButton("OK", new DialogInterface.OnClickListener() {
                public void onClick(DialogInterface dialog, int which) {
                    Log.d("AlertDialog", "Positive");
                    // Present Acknowledgement View!!!!!!!!!
                    Intent intent = new Intent(MainActivity.this, AcknowledgementActivity.class);
                    startActivity(intent);

                    /*Couldn't work this Error:local variable mContext is accessed from within inner class; needs to be declared final
                    Intent intent = new Intent(mContext, AcknowledgementActivity.class);
                    //startActivity(intent);
                    mContext.startActivity(new Intent(mContext, AcknowledgementActivity.class));*/
                }
            })
            .setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
                public void onClick(DialogInterface dialog, int which) {
                    Log.d("AlertDialog", "Negative");
                }
            })
            .show();
}

com.firebase.androidchat.Main.activity。这不能从静态上下文引用

ChatListAdapter中的代码：

public class ChatListAdapter extends FirebaseListAdapter<Chat> {

...

protected void populateView(View view, Chat chat) {
...    
    MainActivity.displayAmountPopup();
}

public static void displayAmountPopup(){

....

    new AlertDialog.Builder(MainActivity.this)
            .setTitle(strTitle)
            .setMessage(strAmountMessage)
            .setPositiveButton("OK", new DialogInterface.OnClickListener() {
                public void onClick(DialogInterface dialog, int which) {
                    Log.d("AlertDialog", "Positive");
                    // Present Acknowledgement View!!!!!!!!!
                    Intent intent = new Intent(MainActivity.this, AcknowledgementActivity.class);
                    startActivity(intent);

                    /*Couldn't work this Error:local variable mContext is accessed from within inner class; needs to be declared final
                    Intent intent = new Intent(mContext, AcknowledgementActivity.class);
                    //startActivity(intent);
                    mContext.startActivity(new Intent(mContext, AcknowledgementActivity.class));*/
                }
            })
            .setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
                public void onClick(DialogInterface dialog, int which) {
                    Log.d("AlertDialog", "Negative");
                }
            })
            .show();
}

com.firebase.androidchat.Main.activity。这不能从静态上下文引用

因为无法访问

main活动。此

来自

静态

方法/块

要获取显示

AlertDialog

的上下文，请向

displayAmountPopup

方法添加一个上下文参数：

public static void displayAmountPopup(Context mContext){
....
    new AlertDialog.Builder(mContext)
    ....
}

现在，从

populateView

调用时，将上下文传递给

displayamountpoop

方法，如下所示：

MainActivity.displayAmountPopup(view.getContext());

---

您可以在对话框中使用上下文 和演员活动开始意图

Intent intent = new Intent(context, AcknowledgementActivity.class);
((Activity) context).startActivity(intent)

从注释代码

public static void displayAmountPopup(Context context){

....

    new AlertDialog.Builder(context)
            .setTitle(strTitle)
            .setMessage(strAmountMessage)
            .setPositiveButton("OK", new DialogInterface.OnClickListener() {
                public void onClick(DialogInterface dialog, int which) {
                    Log.d("AlertDialog", "Positive");
                    // Present Acknowledgement View
                    //Intent intent = new Intent(context, AcknowledgementActivity.class);
                    //startActivity(intent);
                }
            })
            .setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
                public void onClick(DialogInterface dialog, int which) {
                    Log.d("AlertDialog", "Negative");
                }
            })
            .show();
}

---

Thx@ρцσρѕρєK，如果我的AlertDialog中有startActivity（在上面的代码中注释掉了）@user1872384:on

setPositiveButton

按钮单击AlertDialog会在开始活动之前自动取消。您想做什么？单击“确定”按钮后，我想显示确认视图pressed@user1872384：ok use

Intent Intent=new Intent（mContext，ackknowledgementactivity.class）；mContext.startActivity（意图）

@user1872384:如果在

onClick

方法中无法访问

mContext

，则在方法参数中将其声明为final，如：

public static void displayamountpoup（final Context mContext）