Android 开发使用PopupWindow实现弹出警告框的复用类示例

本文实例讲述了android 开发使用popupwindow实现弹出警告框的复用类。分享给大家供大家参考，具体如下：

android开发中相信下图所示界面大家都不陌生，该种弹出框的使用频率也是极高的，所以我专门谢了个类用于方便的弹出该界面。并把确定或取消后的逻辑通过抽象方法的方式让用户自己实现，大大提高了开发效率。下面是该类：

package com.***.popupwindow;

import ******;

public abstract class mypopupwindow {

  private popupwindow popupwindow;
  private activity context;
  private string content;
  private string positiveword = "确定";
  private string negativeword = "取消";

  /**
   * 构造函数
   *
   * @param context
   */
  public mypopupwindow(activity context) {
    this.context = context;
  }

  /**
   * 显示警示框
   */
  public void show() {
    view popview = view.inflate(context, r.layout.popup, null);
    popupwindow = new popupwindow(context);
    popupwindow.setheight(400);
    popupwindow.setwidth(700);
    popupwindow.setoutsidetouchable(true);
    popupwindow.setfocusable(true);
    popupwindow.setcontentview(popview);
    popupwindow.showatlocation(context.getwindow().getdecorview(), gravity.center, 0, 0);

    textview tv_pop_text = (textview) popview.findviewbyid(r.id.tv_pop_text);
    tv_pop_text.settext(content);

    button bt_pop_sure = (button) popview.findviewbyid(r.id.bt_pop_sure);
    bt_pop_sure.settext(positiveword);
    bt_pop_sure.setonclicklistener(new view.onclicklistener() {
      @override
      public void onclick(view v) {
        sureclick();
      }
    });

    button bt_pop_cancel = (button) popview.findviewbyid(r.id.bt_pop_cancel);
    bt_pop_cancel.settext(negativeword);
    bt_pop_cancel.setonclicklistener(new view.onclicklistener() {
      @override
      public void onclick(view v) {
        cancelclick();
      }
    });
  }

  /**
   * 确定键按下后执行
   */
  public abstract void sureclick();

  /**
   * 取消键按下后执行
   */
  public abstract void cancelclick();

  /**
   * 为警示设置警示内容
   *
   * @param content
   */
  public void setcontent(string content) {
    this.content = content;
  }

  /**
   * 设置确定键文字
   *
   * @param positiveword
   */
  public void setpositiveword(string positiveword) {
    this.positiveword = positiveword;
  }

  /**
   * 设置取消键文字
   *
   * @param negativeword
   */
  public void setnegativeword(string negativeword) {
    this.negativeword = negativeword;
  }

  /**
   * 手动取消警示框
   */
  public void dismiss() {
    popupwindow.dismiss();
  }
}

其中弹出框用到的布局popup.xml代码如下：

<?xml version="1.0" encoding="utf-8"?>
<linearlayout xmlns:android="http://schemas.android.com/apk/res/android"
       android:layout_width="match_parent"
       android:layout_height="match_parent"
       android:background="@android:color/white"
       android:orientation="vertical">

  <textview
    android:id="@+id/tv_pop_text"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_weight="1"
    android:gravity="center"/>

  <textview
    android:layout_width="match_parent"
    android:layout_height="1px"
    android:background="@android:color/darker_gray"/>

  <linearlayout
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="horizontal">

    <button
      android:id="@+id/bt_pop_sure"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:background="@android:color/transparent"
      android:layout_weight="1"/>

    <textview
      android:layout_width="1px"
      android:layout_height="match_parent"
      android:background="@android:color/darker_gray"/>

    <button
      android:id="@+id/bt_pop_cancel"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:background="@android:color/transparent"
      android:layout_weight="1"/>
  </linearlayout>

</linearlayout>

下面简单的使用一下：在界面放一个按钮，按钮点击后弹出警告框。代码如下：

package com.toprs.popupwindow;

import android.graphics.color;
import android.graphics.drawable.colordrawable;
import android.support.v7.app.appcompatactivity;
import android.os.bundle;
import android.util.attributeset;
import android.view.gravity;
import android.view.layoutinflater;
import android.view.view;
import android.view.viewgroup;
import android.widget.arrayadapter;
import android.widget.button;
import android.widget.listview;
import android.widget.popupwindow;
import android.widget.seekbar;
import android.widget.toast;

public class mainactivity extends appcompatactivity {

  private popupwindow popupwindow;

  private button button;

  @override
  protected void oncreate(bundle savedinstancestate) {
    super.oncreate(savedinstancestate);
    setcontentview(r.layout.activity_main);

    button = (button) findviewbyid(r.id.button);
    button.setonclicklistener(new view.onclicklistener() {
      @override
      public void onclick(view v) {
        mypopupwindow mypopupwindow = new mypopupwindow(mainactivity.this) {

          @override
          public void sureclick() {
            toast.maketext(mainactivity.this, "确定", toast.length_short).show();
          }

          @override
          public void cancelclick() {
            toast.maketext(mainactivity.this, "取消", toast.length_short).show();
          }
        };
        mypopupwindow.setcontent("确定退出？");
        mypopupwindow.show();
      }
    });
  }
}

即如下效果：

so，以后使用只需要简单调用几句代码就好了！