Android Toast和Notification

1. Toast用法

Toast 可以设置：时间，位置，自定义View

1.1 最普通的Toast

Toast.makeText(ToastActivity.this, "CarloZ Short Toast", Toast.LENGTH_SHORT).show();

1.2 改变Toast的显示位置

Toast shortToast = Toast.makeText(ToastActivity.this, "CarloZ Short Toast", Toast.LENGTH_SHORT);
shortToast.setGravity(Gravity.CENTER, 0, 0); // 显示在屏幕上的位置
shortToast.show();

1.3 显示自定义View

Toast imgToast = Toast.makeText(ToastActivity.this, "CarloZ Image Toast", Toast.LENGTH_SHORT);
ImageView iv = new ImageView(ToastActivity.this);
iv.setImageResource(R.drawable.ic_launcher);

TextView tv = new TextView(ToastActivity.this);
tv.setText("CarloZ Image Toast");
tv.setLayoutParams(new LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.WRAP_CONTENT));;

LinearLayout ll = new LinearLayout(ToastActivity.this);
ll.setOrientation(LinearLayout.VERTICAL);
ll.addView(tv);
ll.addView(iv);
//imgToast.setView(iv); 
//图片代替了文本，如果要显示多个元素，要自定义layout，其中包含多个元素
imgToast.setView(ll);
imgToast.show();

效果如下

2. Notification使用