Java Android自定义Toast消息在单独的类中不起作用

Java Android自定义Toast消息在单独的类中不起作用,java,android,toast,android-toast,Java,Android,Toast,Android Toast,我为自定义toast创建了以下方法 public void customToastMessage(String message){ LayoutInflater inf = (LayoutInflater)con.getSystemService(Context.LAYOUT_INFLATER_SERVICE); View layout = inf.inflate(R.layout.custom_toast_layout,(ViewGroup)findViewById(R.id.

我为自定义toast创建了以下方法

public void customToastMessage(String message){
    LayoutInflater inf = (LayoutInflater)con.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    View layout = inf.inflate(R.layout.custom_toast_layout,(ViewGroup)findViewById(R.id.myCustomToast));
    TextView toastMessage = layout.findViewById(R.id.myCustomToastText);
    toastMessage.setText(message);
    Toast warningMessage = Toast.makeText(con, message, Toast.LENGTH_LONG);
    warningMessage.setGravity(Gravity.TOP | Gravity.CENTER_HORIZONTAL, 0, 10);
    warningMessage.setView(layout);
    warningMessage.show();
}
只要MainActivity中存在此方法,它就可以正常工作,但当我将其移动到单独的类时,我会得到:

“java.lang.IllegalStateException:无法在android.support.v7.app.AppCompatViewInflater$DeclaredOnClickListener.onClick(AppCompatViewInflater.java:389)上执行android的方法:onClick”

我需要在下面的课堂上改变什么

public class MyCustomUI extends AppCompatActivity {

    private static Context con;

    public MyCustomUI(Context con){
        this.con = con;
    }

    public void customToastMessage(String message){
         LayoutInflater inf = (LayoutInflater)con.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
         View layout = inf.inflate(R.layout.custom_toast_layout,(ViewGroup)findViewById(R.id.myCustomToast));
         TextView toastMessage = layout.findViewById(R.id.myCustomToastText);
         toastMessage.setText(message);
         Toast warningMessage = Toast.makeText(con, message, Toast.LENGTH_LONG);
         warningMessage.setGravity(Gravity.TOP | Gravity.CENTER_HORIZONTAL, 0, 10);
         warningMessage.setView(layout);
         warningMessage.show();
    }
}

我猜你的问题是当你膨胀布局时:

视图布局=inf.flate(R.layout.custom_toast_布局,(视图组)findviewbyd(R.id.myCustomToast))

我还猜问题出在
(ViewGroup)findviewbyd(R.id.myCustomToast)
。您试图查找的视图/视图组不存在于该类中,但存在于MainActivity中

将其作为参数传递给方法(仅相关部分):


在MainActivity中调用该方法时,作为ViewGroup customToast?(ViewGroup)findViewById(R.id.myCustomToast)的参数传递什么
public void customToastMessage(String message, ViewGroup customToast){
    LayoutInflater inf = (LayoutInflater)con.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    View layout = inf.inflate(R.layout.custom_toast_layout, viewgroup);