今日总结

直接调用Toast类的makeText()方法创建

这是我们用的最多的一种形式了！比如点击一个按钮，然后弹出Toast，用法： Toast.makeText(MainActivity.this, "提示的内容", Toast.LENGTH_LONG).show();

 第一个是上下文对象！对二个是显示的内容！第三个是显示的时间，只有LONG和SHORT两种 会生效

示例代码：

void midToast(String str, int showTime)
{
    Toast toast = Toast.makeText(global_context, str, showTime);            
    toast.setGravity(Gravity.CENTER_VERTICAL|Gravity.CENTER_HORIZONTAL , 0, 0);  //设置显示位置
    TextView v = (TextView) toast.getView().findViewById(android.R.id.message);
    v.setTextColor(Color.YELLOW);     //设置字体颜色
    toast.show();   
}
实现完全自定义：

private void midToast(String str, int showTime)
{
    LayoutInflater inflater = getLayoutInflater();
    View view = inflater.inflate(R.layout.view_toast_custom,
            (ViewGroup) findViewById(R.id.lly_toast));
    ImageView img_logo = (ImageView) view.findViewById(R.id.img_logo);
    TextView tv_msg = (TextView) view.findViewById(R.id.tv_msg);
    tv_msg.setText(str);
    Toast toast = new Toast(mContext);
    toast.setGravity(Gravity.CENTER, 0, 0);
    toast.setDuration(Toast.LENGTH_LONG);
    toast.setView(view);
    toast.show();
}