标签:
方法inflate(int resource, ViewGroup root, boolean attachToRoot) 中
第一个参数传入布局的资源ID,生成fragment视图,第二个参数是视图的父视图,通常我们需要父
视图来正确配置组件。第三个参数告知布局生成器是否将生成的视图添加给父视图。
我们新建一个项目测试一下:
activity_main.xml
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical" > <TextView android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="helloworld" /> <FrameLayout android:id="@+id/framelayout" android:layout_width="match_parent" android:layout_height="wrap_content"> </FrameLayout> </LinearLayout>
fragment_main.xml:
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical" > <Button android:id="@+id/button1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="Button" /> </LinearLayout>
MainActivity.java:第一种情况没有attachToRoot参数,默认告知布局生成器将生成的视图添加给父视图,
1 public class MainActivity extends Activity { 2 3 @Override 4 protected void onCreate(Bundle savedInstanceState) { 5 super.onCreate(savedInstanceState); 6 setContentView(R.layout.activity_main); 7 ViewGroup vg = (ViewGroup) findViewById(R.id.framelayout); 8 View v = LayoutInflater.from(this).inflate(R.layout.fragment_main, vg); 9 // View v = LayoutInflater.from(this).inflate(R.layout.fragment_main, vg, false); 10 // View v = LayoutInflater.from(this).inflate(R.layout.fragment_main, vg, true); 11 12 13 } 14 15 16 }
第二种情况:参数attachToRoot设为false,不将生成的视图(fragmnt_main)添加给父视图(activity_main),
public class MainActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
ViewGroup vg = (ViewGroup) findViewById(R.id.framelayout);
// View v = LayoutInflater.from(this).inflate(R.layout.fragment_main, vg);
View v = LayoutInflater.from(this).inflate(R.layout.fragment_main, vg, false);
// View v = LayoutInflater.from(this).inflate(R.layout.fragment_main, vg, true);
}
}
第三种情况:参数attachToRoot设为true,将生成的视图(fragmnt_main)添加给父视图(activity_main),
public class MainActivity extends Activity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); ViewGroup vg = (ViewGroup) findViewById(R.id.framelayout); // View v = LayoutInflater.from(this).inflate(R.layout.fragment_main, vg); // View v = LayoutInflater.from(this).inflate(R.layout.fragment_main, vg, false); View v = LayoutInflater.from(this).inflate(R.layout.fragment_main, vg, true); } }
Android LayoutInflater.inflate(int resource, ViewGroup root, boolean attachToRoot)的参数理解
标签:
原文地址:http://www.cnblogs.com/zarea/p/4822158.html