Android开发中怎么样实现自定义toast

//自定义布局的toastcustomViewToast.setOnClickListener(new View.OnClickListener() {  @Override  public void onClick(View v) {    Toast toast = Toast.makeText(ToastTest.this, "top", Toast.LENGTH_SHORT);    //此处只使用一个TextView，当然也可以使用更复杂的View    TextView tv = new TextView(ToastTest.this);    tv.setText("CustomView toast.");    tv.setTextSize(TypedValue.COMPLEX_UNIT_DIP, 20);    tv.setCompoundDrawablesWithIntrinsicBounds(R.drawable.abc_ic_menu_share_mtrl_alpha, 0, 0, 0);    tv.setBackgroundColor(Color.parseColor("#ff88ff"));    tv.setPadding(30, 10, 30, 10);    tv.setGravity(Gravity.CENTER_VERTICAL);    toast.setView(tv);    toast.show();  }});