android 调用隐藏方法是 android 隐藏布局

在布局文件xml中通过属性 android：visibility进行控制。

该属性有三个参数，分别为：visible（可见）invisible（不可见）以及gone

gone与invisible都是不可见的。但不同的是，gone在隐藏的情况下不会占用任何的布局空间。

<?xml version="1.0" encoding="utf-8"?>
 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="fill_parent"
     android:layout_height="fill_parent"
     android:orientation="vertical" >

    <TextView
         android:layout_width="fill_parent"
         android:layout_height="wrap_content"
         android:text="@string/hello" />

    <Button 
         android:layout_width="fill_parent"
         android:layout_height="wrap_content"
         android:text="click it !"
         android:id="@+id/btn_mybuttom"
         />
     <ImageView 
         android:id="@+id/img"
         android:layout_width="fill_parent"
         android:layout_height="wrap_content"
         android:visibility="gone"
         android:src="@drawable/youtube"
         
         />
     <TextView 
         android:text="it is an example!"
         android:layout_width="fill_parent"
         android:layout_height="wrap_content"
         />
 </LinearLayout>

public class SumaryActivity extends Activity {

 private Button btn_Mybutton;
  private ImageView imgView_img;

 /** Called when the activity is first created. */
  @Override
  public void onCreate(Bundle savedInstanceState) {
   super.onCreate(savedInstanceState);
   setContentView(R.layout.main);

  findView();

  btn_Mybutton.setOnClickListener(new OnClickListener() {

   public void onClick(View v) {

    // i=0,it is visible;i=4,it is invisible;i=0,it is gone;
     int i = 0;
     i = imgView_img.getVisibility();
     if (i == 8) {
      imgView_img.setVisibility(View.VISIBLE);
     } else {
      imgView_img.setVisibility(View.GONE);
     }

   }
   });
  }

 /**
   * find views by id for each one
   */
  public void findView() {
   btn_Mybutton = (Button) findViewById(R.id.btn_mybuttom);
   imgView_img = (ImageView) findViewById(R.id.img);
  }
 }

下面对i进行简单的说明。getVisibility()方法是获取当前空间是否可见，如果可见，返回值为8，不可见但占空间，返回值为4；不可见并不占用空间，返回值为0.