首页 > 代码库 > (二十八) Android中ViewStub组件使用(转载自:http://blog.csdn.net/mayingcai1987/article/details/6238609)

(二十八) Android中ViewStub组件使用(转载自:http://blog.csdn.net/mayingcai1987/article/details/6238609)

1. 概述:

     ViewStub组件和<include>标签的作用类似,主要是为了提高布局的重用性,及布局的模块化。它们之间最大的差别是,ViewStub中的布局不会随着它所在布局的渲染而渲染,而<include>标签中的布局会随着它所在布局的渲染而渲染,ViewStub中的布局只有在你需要的时候才会渲染到主界面中。

 2. 效果图:

    (1)在ButtonOne与ButtonTwo之间存在一个ViewStub布局,如下图:

(2)单击ButtonOne后渲染ViewStub中的布局,如下图:

3. 实现代码:

     (1)res/layout/main.xml实现:

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android = "http://schemas.android.com/apk/res/android"    android:orientation = "vertical"    android:layout_width = "fill_parent"    android:layout_height = "fill_parent"    >        <Button        android:id = "@+id/show"        android:text = "ButtonOne"        android:layout_width = "wrap_content"        android:layout_height = "wrap_content"        />        <ViewStub        android:id = "@+id/viewStub"        android:layout = "@layout/green_layout"        android:layout_width = "300dip"        android:layout_height = "300dip"        />            <Button        android:layout_width = "wrap_content"        android:layout_height = "wrap_content"        android:text = "ButtonTwo"        />    </LinearLayout>

   (2)main.xml中ViewStub组件里的布局实现:

<?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:background = "@color/green">      </LinearLayout>

 

(3)主Activity实现:


package
com.focus.fishme;import android.app.Activity;import android.os.Bundle;import android.view.View;import android.view.ViewStub;import android.view.View.OnClickListener;import android.widget.Button;public class ViewStubActivity extends Activity { private ViewStub mViewStub; private Button mShow; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); mViewStub = (ViewStub) findViewById(R.id.viewStub); mShow = (Button) findViewById(R.id.show); mShow.setOnClickListener(new OnClickListener() { public void onClick(View view) { if (mViewStub != null) { mViewStub.inflate(); } } }); } }

 

(二十八) Android中ViewStub组件使用(转载自:http://blog.csdn.net/mayingcai1987/article/details/6238609)