Android开发之获取LayoutInflater对象的方法总结

方法1和方法2其实都是对context().getSystemService()的使用

3、使用View的静态方法：

View view=View.inflate(context, R.layout.child, null)

inflate实现源码如下：

/**
 * Inflate a view from an XML resource. This convenience method wraps the {@link
 * LayoutInflater} class, which provides a full range of options for view inflation.
 *
 * @param context The Context object for your activity or application.
 * @param resource The resource ID to inflate
 * @param root A view group that will be the parent. Used to properly inflate the
 * layout_* parameters.
 * @see LayoutInflater
 */
public static View inflate(Context context, int resource, ViewGroup root) {
  LayoutInflater factory = LayoutInflater.from(context);
  return factory.inflate(resource, root);
}

LayoutInflater.from(context)实际上是对方法1的包装，可参考以下源码：

/**
 * Obtains the LayoutInflater from the given context.
 */
public static LayoutInflater from(Context context) {
  LayoutInflater LayoutInflater =
      (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
  if (LayoutInflater == null) {
    throw new AssertionError("LayoutInflater not found.");
  }
  return LayoutInflater;
}

 

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