1.基础
Context context = getApplicationContext(); CharSequence text = "Hello toast!"; int duration = Toast.LENGTH_SHORT; Toast toast = Toast.makeText(context, text, duration); toast.show();当然也可以将方法连起来而不是保持一个Toast对象：
Toast.makeText(context, text, duration).show();2.放置位置
toast.setGravity(Gravity.TOP|Gravity.LEFT, x, y);可以通过setGravity方法来改变toast的默认显示位置
3.自定义Toast
LayoutInflater inflater = getLayoutInflater(); View layout = inflater.inflate(R.layout.custom_toast, (ViewGroup) findViewById(R.id.toast_layout_root)); TextView text = (TextView) layout.findViewById(R.id.text); text.setText("This is a custom toast"); Toast toast = new Toast(getApplicationContext()); toast.setGravity(Gravity.CENTER_VERTICAL, 0, 0); toast.setDuration(Toast.LENGTH_LONG); toast.setView(layout); toast.show();