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       当我们使用ListView或GridView的时候，当列表为空的时候，我们需要一个特殊的View来提示用户操作，于是就有了setEmptyView().下面看看如何使用：

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<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent">
    <ListView
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:id="@+id/list_view" />
    <TextView
        android:id="@+id/empty_list_view"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="List view is empty"
        android:visibility="gone" />
</LinearLayout>

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ListView list= (ListView)findViewById(R.id.mylist);
TextView tv= (TextView)findViewById(R.id.myempty);
list.setEmptyView(tv);

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TextView emptyView = new TextView(context);
emptyView.setLayoutParams(new LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT));
emptyView.setText(“This appears when the list is empty”);
emptyView.setVisibility(View.GONE);
((ViewGroup)list.getParent()).addView(emptyView);
list.setEmptyView(emptyView);

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inflater = getLayoutInflater();
emptyView = inflater.inflate(R.layout.empty_view, null);
addContentView(emptyView, new LayoutParams(LayoutParams.FILL_PARENT,LayoutParams.FILL_PARENT));
list.setEmptyView(emptyView);

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emptyView.setVisibility(View.GONE);

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((ViewGroup)list.getParent()).addView(emptyView);
//或者
addContentView(emptyView, new LayoutParams(LayoutParams.FILL_PARENT,LayoutParams.FILL_PARENT));