java - 在android中制作一个自定义函数，这样我就可以在任何地方使用它

Question

我创建了一个java类，但我认为如果它不是用于getLayoutInflator()和getApplicationContext()，这会起作用我该如何解决这个问题，这就是我所拥有的

public final class CustomFunctions {
    /**
     * Private constructor to prevent instantiation
     */
    private CustomFunctions() {}

    public static void customToast(String msg){
        /*Custom Toast Message*/
        LayoutInflater inflater = getLayoutInflater();
        View layout = inflater.inflate(R.layout.toast,
                (ViewGroup) findViewById(R.id.toast_layout_root));


        TextView text = (TextView) layout.findViewById(R.id.text);
        text.setText(msg);
        Button btnDismiss = (Button) layout.findViewById(R.id.btndismiss);
        final Toast toast = new Toast(getApplicationContext());


        toast.setDuration(Toast.LENGTH_LONG);
        toast.setView(layout);
        toast.show();
        hideDialog();
        btnDismiss.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                toast.cancel();
            }
        });
        /*Custom Toast Message*/
    }
}

Answer 1

如果我很好地理解你的问题，你确实需要将上下文作为参数传递给类或函数。这就是你可以这样调用它

CustomFunctions.customToast(getApplicationContext(),"This is Toast message");


public final class CustomFunctions {
/**
 * Private constructor to prevent instantiation
 */
private CustomFunctions() {}

public static void customToast(Context context,String msg){
    /*Custom Toast Message*/
    LayoutInflater inflater = LayoutInflater.from(context);**//get inflater service from context**
    View layout = inflater.inflate(R.layout.toast,
            (ViewGroup) findViewById(R.id.toast_layout_root));


    TextView text = (TextView) layout.findViewById(R.id.text);
    text.setText(msg);
    Button btnDismiss = (Button) layout.findViewById(R.id.btndismiss);
    final Toast toast = new Toast(context);**//pass context**


    toast.setDuration(Toast.LENGTH_LONG);
    toast.setView(layout);
    toast.show();
    hideDialog();
    btnDismiss.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            toast.cancel();
        }
    });
    /*Custom Toast Message*/
}

}