允许从另一个班级访问烤面包

Question

I am trying to use a toast from another class.

In class 1 I have the toast method:

public static void textToast(String textToDisplay) 
{
    Context context = getApplicationContext();
    CharSequence text = textToDisplay;
    int duration = Toast.LENGTH_SHORT;

    Toast toast = Toast.makeText(context, text, duration);
    toast.setGravity(Gravity.CENTER_HORIZONTAL|Gravity.CENTER, 50, 50);
    toast.show();
}

I am trying to call this toast from another class but when I make the method static, it says cannot make a static reference to this method getApplicationContext().

I access it by using class2.textToast("");

Any advice on this would be appreciated. Thanks

Answer 1

If you want to provide a method which should be valid for different contexts (eg activities), pass this context as parameter.

public static void textToast(String textToDisplay, Context context)  { ... }

If you want to call this method from nested inner classes (as is often the case), you can use this as context

public void textToast(String textToDisplay) {
    ...
    Toast toast = Toast.makeText(OuterClass.this, text, duration);
    ...
}

(or implement textToast in the outer class and call it via OuterClass.this.textToast from the nested inner class)

Answer 2

public void FlesmynToast(Activity fActivity, String fMessage) {
    LayoutInflater fInflater = fActivity.getLayoutInflater();
    View fView = fInflater.inflate(R.layout.custom_toast (ViewGroup) fActivity.findViewById(R.id.custom_toast_layout_id));

    ImageView image = (ImageView) fView.findViewById(R.id.image);
    image.setImageResource(R.drawable.ic_launcher);

    TextView fText = (TextView) fView.findViewById(R.id.text);
    fText.setText(fMessage);

        // Toast...
    Toast fToast = new Toast(fActivity.getApplicationContext());
    fToast.setGravity(Gravity.CENTER_VERTICAL, 0, 0);
    fToast.setDuration(Toast.LENGTH_LONG);
    fToast.setView(fView);
    fToast.show();
}