PopupWindow的使用

最新推荐文章于 2025-04-18 13:06:34 发布

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最新推荐文章于 2025-04-18 13:06:34 发布

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分类专栏： android 文章标签： android

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本文详细介绍了如何在Android应用中使用PopupWindow，包括XML布局文件main.xml、pop.xml和grid_item.xml的代码展示，以及MainActivity中的关键代码实现。通过示例展示了如何创建一个包含GridView的PopupWindow，并设置了每一项的点击事件。

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main.xml中的代码:

<?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"
   android:id="@+id/main"
   >

pop.xml的源代码：

<?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"
  >

  <GridView
  android:layout_width="fill_parent"
android:layout_height="wrap_content"
  android:numColumns="4"
  android:horizontalSpacing="10dp"
  android:verticalSpacing="10dp"
  android:id="@+id/gridView"
  />
</LinearLayout>

grid_item.xml的源代码：代表POP中每一项的内容布局

<?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"
  android:gravity="center"
  >
  <ImageView
  android:layout_width="wrap_content"
android:layout_height="wrap_content"
  android:id="@+id/icon"
  />
  <TextView
  android:layout_width="fill_parent"
android:layout_height="wrap_content"
  android:textColor="#003399"
  android:textSize="14sp"
  android:gravity="center"
  android:id="@+id/title"
  />
</LinearLayout>

MainActivity中的代码

public class MainActivity extends Activity {

private int[] menu_image_array = {R.drawable.i1, R.drawable.i2,
R.drawable.i3, R.drawable.i4,
R.drawable.i5, R.drawable.i6,
R.drawable.i7, R.drawable.i8};

private String[] menu_name_array = {"搜索", "文件管理", "下载管理", "全屏", "网址", "书签", "加入书签", "分享页面"};

PopupWindow popupWindow;
GridView gridView;

   @Override
   public void onCreate(Bundle savedInstanceState) {
       super.onCreate(savedInstanceState);
       requestWindowFeature(Window.FEATURE_CUSTOM_TITLE);
       setContentView(R.layout.main);
       getWindow().setFeatureInt(Window.FEATURE_CUSTOM_TITLE, R.layout.windowtitle);

       View popView = getLayoutInflater().inflate(R.layout.pop, null);
       popupWindow = new PopupWindow(popView, ViewGroup.LayoutParams.FILL_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT);
       popupWindow.setBackgroundDrawable(new BitmapDrawable());
       popupWindow.setFocusable(true);//取的焦点，创建出来的popupwindow默认无焦点
       gridView = (GridView) popView.findViewById(R.id.gridView);

//设置Pop窗口内部每一项的点击事件
       gridView.setOnItemClickListener(new ItemClickListener());
   }

   private final class ItemClickListener implements OnItemClickListener{
  public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
   //处理工作
   if(popupwindows.isShowing()) popupWindow.dismiss();
  }
   }


   private ListAdapter createAdapter() {
    ArrayList<HashMap<String, Object>> data = new ArrayList<HashMap<String,Object>>();
    for(int i = 0 ; i < menu_image_array.length ; i++){
     HashMap<String, Object> item = new HashMap<String, Object>();
     item.put("icon", menu_image_array[i]);
     item.put("title", menu_name_array[i]);
     data.add(item);
    }
  SimpleAdapter adapter = new SimpleAdapter(this, data, R.layout.grid_item,
    new String[]{"icon","title"}, new int[]{R.id.icon, R.id.title});

  return adapter;
}

//打开Pop窗口

public void openPopWindow(View v){
    popupWindow.showAtLocation(findViewById(R.id.main), Gravity.BOTTOM|Gravity.CENTER_HORIZONTAL, 0, 0);
    gridView.setAdapter(createAdapter());
   }
}