android PopupWindow实现从底部弹出或滑出选择菜单或窗口

来源：互联网发布：软件开发工程师英文编辑：程序博客网时间：2024/04/29 07:35

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:

[mw_shl_code=xhtml,true]<?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>[/mw_shl_code]

第二步：创建SelectPicPopupWindow类继承PopupWindow：

Java代码

[mw_shl_code=java,true]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;
}
});

}

}
[/mw_shl_code]

第三步：编写MainActivity类实现测试：

Java代码

[mw_shl_code=java,true]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;
}


}

};

}
[/mw_shl_code]

第四：运行效果如下：

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