Android UI开发第三篇——popupwindow
PopupWindow在android.widget包下，弹出窗口的形式展示。官方文档对该控件的描述是：“一个弹出窗口控件，可以用来显示任意视图(View)，而且会浮动在当前 活动(activity)的顶部”。PopupWindow可以让我们实现多种自定义控件，例如：menu、alertdialog等弹窗似的View。 popupwindow需要在onCreate时初始化、通过触发事件展示出来。 public class ShowPopupWindow extends Activity implements View.OnClickListener{ View view; PopupWindow pop; Button btnShowAsDrawDown; Button btnShowAsDrawDown1; Button btnShowAtLocation; @Override protected void onCreate(Bundle savedInstanceState) { // TODO Auto-generated method stub super.onCreate(savedInstanceState); setContentView(R.layout.popup_activity); btnShowAsDrawDown = (Button)findViewById(R.id.btnShowAsDrawDown); btnShowAsDrawDown.setOnClickListener(this); btnShowAsDrawDown = (Button)findViewById(R.id.btnShowAsDrawDown1); btnShowAsDrawDown.setOnClickListener(this); btnShowAtLocation = (Button)findViewById(R.id.btnShowAt); btnShowAtLocation.setOnClickListener(this); initPopupWindow(); } @Override public void onClick(View v) { // TODO Auto-generated method stub switch(v.getId()) { case R.id.btnShowAsDrawDown: if(pop.isShowing()) { pop.dismiss(); } else { pop.showAsDropDown(v); } break; case R.id.btnShowAsDrawDown1: if(pop.isShowing()) { pop.dismiss(); } else { pop.showAsDropDown(v, 0, -160); } break; default: if(pop.isShowing()) { pop.dismiss(); } else { pop.showAtLocation(findViewById(R.id.main), Gravity.CENTER_HORIZONTAL, 0, 0); } break; } } private void initPopupWindow() { view = this.getLayoutInflater().inflate(R.layout.popup_window, null); pop = new PopupWindow(view, ViewGroup.LayoutParams.FILL_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT); pop.setOutsideTouchable(true); view.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { // TODO Auto-generated method stub pop.dismiss(); } }); } } popup_activity.xml <?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:id="@+id/main" android:layout_width="fill_parent" android:layout_height="fill_parent"> <TextView android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="pop demo!" /> <Button android:id="@+id/btnShowAsDrawDown" android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="Show as drawndown(one parameter)" /> <Button android:id="@+id/btnShowAsDrawDown1" android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="Show as drawndown(three parameters)" /> <Button android:id="@+id/btnShowAt" android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="Show At Location" /> </LinearLayout> popup_window.xml <?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_horizontal" android:background="#d3d3d3"> <Button android:id="@+id/btn_pop" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="Close" android:layout_margin="10dip" /> </LinearLayout> 本文转自xyz_lmn51CTO博客，原文链接：http://blog.51cto.com/xyzlmn/817389 ，如需转载请自行联系原作者
