Android弹出窗口关闭问题

我正在尝试一个弹出窗口的示例，面临2个问题 1） 弹出窗口未关闭 2） showAtLocation正在提供空指针异常

public void onShowPopup(View v){
    RelativeLayout relativeLayout = (RelativeLayout)findViewById(R.id.mainActivity);
    LayoutInflater layoutInflater = (LayoutInflater)getSystemService(Context.LAYOUT_INFLATER_SERVICE);

    View inflatedView = layoutInflater.inflate(R.layout.informationpopup, relativeLayout);

    final PopupWindow popWindow = new PopupWindow(getBaseContext());
    popWindow.setContentView(inflatedView);

    popWindow.setBackgroundDrawable(new BitmapDrawable());
    popWindow.setFocusable(true);
    //popWindow.setOutsideTouchable(true);


    //popWindow.showAtLocation(inflatedView, Gravity.NO_GRAVITY, 0, 0);

    // Getting a reference to Close button, and close the popup when clicked.
    Button close = (Button) findViewById(R.id.close);
    close.setOnClickListener(new OnClickListener() {
        @Override
        public void onClick(View v) {
            Toast t = Toast.makeText(getBaseContext(), "Close", Toast.LENGTH_LONG);
            t.show();
            popWindow.dismiss();        
        }
    });
}

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你充气的方式是错误的。另外，showAtLocation视图应该是显示弹出窗口的父视图

给你，这应该有用

   public void onShowPopup(View v){
    LayoutInflater layoutInflater = (LayoutInflater)getSystemService(Context.LAYOUT_INFLATER_SERVICE);

    View inflatedView = layoutInflater.inflate(R.layout.informationpopup, null,false);

    final PopupWindow popWindow = new PopupWindow(getBaseContext());
    popWindow.setContentView(inflatedView);

    popWindow.setBackgroundDrawable(new BitmapDrawable());
    popWindow.setFocusable(true);
    popWindow.setOutsideTouchable(true);

    // Getting a reference to Close button, and close the popup when clicked.
    Button close = (Button) inflatedView.findViewById(R.id.close);
    close.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            Toast t = Toast.makeText(getBaseContext(), "Close", Toast.LENGTH_LONG);
            t.show();
            popWindow.dismiss();
        }
    });
    popWindow.setWidth(ViewGroup.LayoutParams.WRAP_CONTENT);
    popWindow.setHeight(ViewGroup.LayoutParams.WRAP_CONTENT);
    popWindow.showAtLocation(v, Gravity.NO_GRAVITY, v.getLeft(),v.getBottom());
}

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谢谢这确实奏效了。我看到你对代码做了一些调整。你能解释一下吗。我的理解是，我们需要膨胀到给定的视图，而不是空视图。另外，为什么需要对onclick侦听器进行更改？下面关于inflate的博客说不要使用null[link]