android > PopupWindow 底部弹出框

父Activity 里面的布局的最上层的 layout 需要添加一个 ID : android:id="@+id/main"

package t1.mft;import android.app.Activity;import android.os.Bundle;import android.view.Gravity;import android.view.LayoutInflater;import android.view.View;import android.view.WindowManager;import android.widget.Button;import android.widget.PopupWindow;public class T1Activity extends Activity {    /** Called when the activity is first created. */private LayoutInflater inflater; private View layout;private PopupWindow menu; private Button button1;    @Override    public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.main);        button1 = (Button)findViewById(R.id.button1);        initMenu();        button1.setOnClickListener(new View.OnClickListener() {public void onClick(View v) {// TODO Auto-generated method stubshow();}});    }    //实例化PopupWindow创建菜单      private void initMenu(){                //获取LayoutInflater实例              inflater  = (LayoutInflater) this.getSystemService(LAYOUT_INFLATER_SERVICE);              //获取弹出菜单的布局              layout = inflater.inflate(R.layout.menu,null);             final Button close = (Button)layout.findViewById(R.id.close);                         //关闭Pop            close.setOnClickListener(new View.OnClickListener() {public void onClick(View v) {// TODO Auto-generated method stubmenu.dismiss();}});                        //设置popupWindow的布局              menu = new PopupWindow(layout, WindowManager.LayoutParams.WRAP_CONTENT,WindowManager.LayoutParams.WRAP_CONTENT);        }        //显示菜单      private void show(){             //设置位置              menu.showAtLocation(T1Activity.this.findViewById(R.id.main), Gravity.BOTTOM|Gravity.CENTER_HORIZONTAL,0,0); //设置在屏幕中的显示位置              menu.setFocusable(true); //设置PopupWindow可获得焦点            menu.setTouchable(true); //设置PopupWindow可触摸            menu.setOutsideTouchable(false); //设置非PopupWindow区域可触摸    }         }

附带上衣个弹出框的样式

<?xml version="1.0" encoding="utf-8"?><RelativeLayout     xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="fill_parent"    android:layout_height="wrap_content"    android:gravity="center_horizontal"    android:orientation="vertical"  ><LinearLayout     android:id="@+id/pop_layout"    android:layout_width="fill_parent"    android:layout_height="wrap_content"    android:gravity="center_horizontal"    android:orientation="vertical"    android:layout_alignParentBottom="true"     android:background="@drawable/btn_style_alert_dialog_background"     ></LinearLayout></RelativeLayout>

其中btn_style_alert_dialog_background 如下图

如果要实现父级布局被遮盖灰掉，

popAlert = new PopupWindow(alert_layout, WindowManager.LayoutParams.FILL_PARENT,WindowManager.LayoutParams.FILL_PARENT);

然后弹出POP的布局文件的最定居的布局文件可以加载一个透明的背景图片

<?xml version="1.0" encoding="utf-8"?><RelativeLayout     xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="fill_parent"    android:layout_height="fill_parent"    android:background="@drawable/alpha_50"    android:gravity="center_horizontal"    android:orientation="vertical"  >

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