android PopupWindow实现从底部弹出或滑出选择菜单或窗口

本实例弹出窗口主要是继承PopupWindow类来实现的弹出窗体，布局可以根据自己定义设计。弹出效果主要使用了translate和alpha样式实现，具体实习如下：

第一步：设计弹出窗口xml:

<?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"
     >

    
    <Button
        android:id="@+id/btn_take_photo"
        android:layout_marginLeft="20dip"
        android:layout_marginRight="20dip"
        android:layout_marginTop="20dip"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="拍照"
        android:background="@drawable/btn_style_alert_dialog_button"
        android:textStyle="bold"
         />

    <Button
        android:id="@+id/btn_pick_photo"
        android:layout_marginLeft="20dip"
        android:layout_marginRight="20dip"
        android:layout_marginTop="5dip" 
         android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="从相册选择"
         android:background="@drawable/btn_style_alert_dialog_button"
         android:textStyle="bold"
         />

    <Button
        android:id="@+id/btn_cancel"
       android:layout_marginLeft="20dip"
       android:layout_marginRight="20dip"
       android:layout_marginTop="15dip" 
	   android:layout_marginBottom="15dip"
       android:layout_width="fill_parent"
       android:layout_height="wrap_content"
       android:text="取消"
       android:background="@drawable/btn_style_alert_dialog_cancel"
       android:textColor="#ffffff"
       android:textStyle="bold"
       
        />
</LinearLayout>
</RelativeLayout>

第二步：创建SelectPicPopupWindow类继承PopupWindow：

import android.app.Activity;
import android.content.Context;
import android.graphics.drawable.ColorDrawable;
import android.view.LayoutInflater;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.View.OnTouchListener;
import android.view.ViewGroup.LayoutParams;
import android.widget.Button;
import android.widget.PopupWindow;

public class SelectPicPopupWindow extends PopupWindow {

	private Button btn_take_photo, btn_pick_photo, btn_cancel;
	private View mMenuView;

	public SelectPicPopupWindow(Activity context,OnClickListener itemsOnClick) {
		super(context);
		LayoutInflater inflater = (LayoutInflater) context
				.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
		mMenuView = inflater.inflate(R.layout.alert_dialog, null);
		btn_take_photo = (Button) mMenuView.findViewById(R.id.btn_take_photo);
		btn_pick_photo = (Button) mMenuView.findViewById(R.id.btn_pick_photo);
		btn_cancel = (Button) mMenuView.findViewById(R.id.btn_cancel);
		//取消按钮
		btn_cancel.setOnClickListener(new OnClickListener() {

			public void onClick(View v) {
				//销毁弹出框
				dismiss();
			}
		});
		//设置按钮监听
		btn_pick_photo.setOnClickListener(itemsOnClick);
		btn_take_photo.setOnClickListener(itemsOnClick);
		//设置SelectPicPopupWindow的View
		this.setContentView(mMenuView);
		//设置SelectPicPopupWindow弹出窗体的宽
		this.setWidth(LayoutParams.FILL_PARENT);
		//设置SelectPicPopupWindow弹出窗体的高
		this.setHeight(LayoutParams.WRAP_CONTENT);
		//设置SelectPicPopupWindow弹出窗体可点击
		this.setFocusable(true);
		//设置SelectPicPopupWindow弹出窗体动画效果
		this.setAnimationStyle(R.style.AnimBottom);
		//实例化一个ColorDrawable颜色为半透明
		ColorDrawable dw = new ColorDrawable(0xb0000000);
		//设置SelectPicPopupWindow弹出窗体的背景
		this.setBackgroundDrawable(dw);
		//mMenuView添加OnTouchListener监听判断获取触屏位置如果在选择框外面则销毁弹出框
		mMenuView.setOnTouchListener(new OnTouchListener() {
			
			public boolean onTouch(View v, MotionEvent event) {
				
				int height = mMenuView.findViewById(R.id.pop_layout).getTop();
				int y=(int) event.getY();
				if(event.getAction()==MotionEvent.ACTION_UP){
					if(y<height){
						dismiss();
					}
				}				
				return true;
			}
		});

	}

}

第三步：编写MainActivity类实现测试：

import android.app.Activity;
import android.os.Bundle;
import android.view.Gravity;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.TextView;

public class MainActivity extends Activity {

	//自定义的弹出框类
	SelectPicPopupWindow menuWindow;
	
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        TextView tv = (TextView) this.findViewById(R.id.text);
        //把文字控件添加监听，点击弹出自定义窗口
        tv.setOnClickListener(new OnClickListener() {			
			public void onClick(View v) {
				//实例化SelectPicPopupWindow
				menuWindow = new SelectPicPopupWindow(MainActivity.this, itemsOnClick);
				//显示窗口
				menuWindow.showAtLocation(MainActivity.this.findViewById(R.id.main), Gravity.BOTTOM|Gravity.CENTER_HORIZONTAL, 0, 0); //设置layout在PopupWindow中显示的位置
			}
		});
    }
    
    //为弹出窗口实现监听类
    private OnClickListener  itemsOnClick = new OnClickListener(){

		public void onClick(View v) {
			menuWindow.dismiss();
			switch (v.getId()) {
			case R.id.btn_take_photo:
				break;
			case R.id.btn_pick_photo:				
				break;
			default:
				break;
			}
			
				
		}
    	
    };
    
}

第四：运行效果如下：



源码:http://yunpan.cn/QGnhH4NUUQFgG