Android 用PopupWindow实现弹出警告框的复用类

转载请标明出处：http://blog.csdn.net/wangtaocsdn/article/details/71330670

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！