LayoutInflater作用是将layout的xml布局文件实例化为View类对象。

LayoutInflater inflater=(LayoutInflater)context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);

View layout = inflater.inflate(R.layout.main,

null

);

LayoutInflater inflater = LayoutInflater.from(context); (该方法实质就是第一种方法，可参考源代码)

View layout = inflater.inflate(R.layout.main,

null

);

LayoutInflater inflater = getLayoutInflater();（在Activity中可以使用，实际上是View子类下window的一个函数）

View layout = inflater.inflate(R.layout.main,

null

);

public

class

MyInflate

extends

Activity{

private

TextView tv;

public

void

OnCreate(Bundle savedInstanceState){

super

.onCreate(savedInstanceState);

//setContentView(R.layout.main);

//tv = (TextView) findViewById(R.id.tv);

LayoutInflater inflate = LayoutInflater.from(

this

);

View view = inflate.inflate(R.layout.main,

null

);

setContentView(view);

}

}