最近项目里总是用到PopupWindow，功能不是很复杂但是写起来很繁琐、代码很乱，所以就自己封装了一个SimplePopupWindow，基于Builder模式。

功能

• 可点击空白地方或者返回键使PopupWindow消失
• 可设置并调节半透明黑色背景，并且PopupWindow消失后背景色自动恢复
• 不会被软键盘覆盖
• 可设置是否同时弹出软键盘
• 可设置进出动画

一个简单带动画的PopupWindow弹出

image

只需四行代码加一个接口回调

SimplePopupWindow.with(MainActivity.this)
    .setView(R.layout.popup_window_main)  //设置你的视图资源文件
    .setAnimationStyle(R.style.anim_simple_popup_window)  //设置你的动画资源文件
    .show(new SimplePopupWindow.Callback() {
    @Override
    public void getView(View view, PopupWindow popupWindow) {
        //view是你资源文件生成的视图
    
    }
});

NOTE:后面放出动画的资源文件

带半透明灰色背景

image

SimplePopupWindow.with(MainActivity.this)
    .setView(R.layout.popup_window_main)
    .setBackgroundAlpha(0.4f)  //设置你的背景透明度
    .show(new SimplePopupWindow.Callback() {
    @Override
    public void getView(View view, PopupWindow popupWindow) {
    
    }
});

API文档

Note:

• 不要在Activity的onCreate()方法中直接show()，因为此时Activity的视图开没有绘制完成。
• 一定要在show()之前调用setView()。
• layout布局文件要设置固定高度或wrap_content

SimplePopupWindow代码

//直接新建SimplePopupWindow类拷贝过去
public class SimplePopupWindow {
private Activity mActivity;
private View mView;
private boolean mIsShowInput;
private int animationStyle;
private int LOCATION = -1;


public static SimplePopupWindow with(Activity activity) {
    return new SimplePopupWindow(activity);
}


public SimplePopupWindow(Activity activity) {
    mActivity = activity;
    animationStyle = -1;
}


//设置弹出位置，默认底部弹出
public void setLocation(int Lacation){
    LOCATION = Lacation;
}


//视图资源,必须设置
public SimplePopupWindow setView(int ResId) {
    mView = LayoutInflater.from(mActivity).inflate(ResId, null);
    return this;
}


//弹出PopupWindow
public void show(Callback callback) {
    if (mView == null){
        Toast.makeText(mActivity,"请设置View", Toast.LENGTH_SHORT).show();
        return;
    }

    PopupWindow window = new PopupWindow(mView, ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT, true);

    if (animationStyle != -1)  //如果设置了动画，则启用动画
        window.setAnimationStyle(animationStyle);

    window.setBackgroundDrawable(new ColorDrawable());

    window.setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_ADJUST_RESIZE);  //不会被软键盘覆盖

    window.setOnDismissListener(new PopupWindow.OnDismissListener() { //弹窗消失时恢复背景色
        @Override
        public void onDismiss() {
            setBackgroundAlpha(1f);
        }
    });

    callback.getView(mView,window);

    if (LOCATION != -1)
        window.showAtLocation(mActivity.getWindow().getDecorView().findViewById(android.R.id.content), LOCATION, 0, 0);
    else
        window.showAtLocation(mActivity.getWindow().getDecorView().findViewById(android.R.id.content), Gravity.BOTTOM | Gravity.CENTER_HORIZONTAL, 0, 0);
    
    showInPut();
}


//设置黑色半透明背景，建议设置0.4f,默认不设置
public SimplePopupWindow setBackgroundAlpha(float bgAlpha) {
    WindowManager.LayoutParams lp = mActivity.getWindow().getAttributes();
    lp.alpha = bgAlpha;
    if (bgAlpha == 1) {
        mActivity.getWindow().clearFlags(WindowManager.LayoutParams.FLAG_DIM_BEHIND);//不移除该Flag的话,在有视频的页面上的视频会出现黑屏的bug
    } else {
        mActivity.getWindow().addFlags(WindowManager.LayoutParams.FLAG_DIM_BEHIND);//此行代码主要是解决在华为手机上半透明效果无效的bug
    }
    mActivity.getWindow().setAttributes(lp);
    return this;
}


//设置是否自动弹出软键盘,默认为否
public SimplePopupWindow setAutoPopupInput(boolean isShowInput) {
    mIsShowInput = isShowInput;
    return this;
}


//设置进出动画
public SimplePopupWindow setAnimationStyle(int animationStyle){
    this.animationStyle = animationStyle;
    return this;
}


//显示软键盘
private void showInPut(){
    if (mIsShowInput){
        new Handler().postDelayed(new Runnable() {
            @Override
            public void run() {
                InputMethodManager imm = (InputMethodManager)mActivity.getSystemService(Context.INPUT_METHOD_SERVICE);
                imm.toggleSoftInput(0, InputMethodManager.HIDE_NOT_ALWAYS);
            }
        }, 0);
    }
}


//接口回调
public interface Callback {
    void getView(View view, PopupWindow popupWindow);
  }
}

动画资源文件

transition/out.xml （新建transition或anim目录）

 <?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android" >
    <translate
        android:duration="250"  
        android:fromYDelta="0.0"
        android:toYDelta="100%" />
</set>

transition/in.xml

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android" >
    <translate
        android:duration="250"
        android:fromYDelta="100.0%"
        android:toYDelta="0.0" />
</set>

values/styles.xml

<style name="anim_simple_popup_window">
    <item name="android:windowEnterAnimation">@transition/in</item>
    <item name="android:windowExitAnimation">@transition/out</item>
</style>