自定义土司的集中方式

				Toast taToast = Toast.makeText(MainActivity.this, null, Toast.LENGTH_SHORT);
				taToast.setGravity(Gravity.CENTER, 180, 0);中心向右180px
				taToast.setText("我是自定义土司");
				taToast.setDuration(Toast.LENGTH_SHORT);
				taToast.show();

Toast taToast = new Toast(MainActivity.this);
				taToast.setDuration(Toast.LENGTH_SHORT);
				taToast.setGravity(Gravity.CENTER_HORIZONTAL, 0, 0);
				
				LinearLayout llLayout = new LinearLayout(MainActivity.this);
				ImageView view = new ImageView(MainActivity.this);
				view.setImageDrawable(getResources().getDrawable(R.drawable.ic_launcher));
				llLayout.addView(view);
				
				TextView tv = new TextView(MainActivity.this);
				tv.setText("我是。。");
				tv.setBackgroundDrawable(getResources().getDrawable(R.drawable.green));
				llLayout.addView(tv);
				
				taToast.setView(llLayout);
				taToast.show();

第二种：

				Toast toast = new Toast(MainActivity.this);
				toast.setGravity(Gravity.CENTER, 0, 0);
				toast.setDuration(Toast.LENGTH_SHORT);
				
//				LayoutInflater inflater = getLayoutInflater();
//				View view = inflater.inflate(R.layout.toast, null);
				toast.setView(View.inflate(MainActivity.this, R.layout.toast,null));
				toast.show();