如何建立一个Facebook的评论，如android中的弹出窗口？ [英] how to build a facebook comment like popup in android?

问题描述

我想制作一个弹出框，如Facebook的android应用程序，打开按下评论按钮。我想为我的应用程序设计同样的弹出窗口。任何人都可以让我知道如何构建，或只是指导我设计这种事情的要求。

I would like to make a popup box like facebook android app which opens up on pressing the comments button. i want to design the same kind of pop-up for my application . Can anyone let me know how it can be build or just guide me what is the requirement to design that kind of thing.

谢谢。

推荐答案

可以通过

PopupWindow

PopupWindow

这里是弹出窗口调用活动或片段的过程。
Facebook使用反弹图书馆进行精彩的秋千动画。但是我使用了正常的xml动画文件。

Here is the procedure of calling popup window over activity or fragment. Facebook using Rebound Library for awesome swing animations. But i used normal xml animation files for that.

popup_layout.xml

popup_layout.xml

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

    <LinearLayout
        android:id="@+id/headerLayout"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:minHeight="?attr/actionBarSize"
        android:orientation="horizontal"
        android:layout_alignParentTop="true"
        android:gravity="center">

        <TextView
            android:layout_gravity="center"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Some One and 20 Others Like this"
            android:textColor="@color/black"
            android:textStyle="bold"
            android:layout_margin="5dp"/>
    </LinearLayout>

    <ListView
        android:id="@+id/commentsListView"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_below="@id/headerLayout"
        android:layout_above="@+id/comment_section"
        android:layout_marginBottom="0dp"/>

    <LinearLayout
        android:id="@+id/comment_section"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:minHeight="50dp"
        android:layout_alignParentBottom="true"
        android:layout_marginBottom="5dp"
        android:orientation="horizontal"
        android:layout_marginLeft="10dp"
        android:layout_marginRight="10dp"
        android:gravity="center"
        >

        <ImageView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:maxHeight="30dp"
            android:minHeight="20dp"
            android:layout_gravity="center"
            android:src="@mipmap/ic_launcher"
            />
        <EditText
            android:id="@+id/writeComment"
            android:hint="Write a Comment"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:maxLines="2"
            android:focusable="true"
            android:layout_marginLeft="2dp"
            android:textSize="12sp"
            android:textColor="@color/black"
            android:background="#00000000"/>

    </LinearLayout>

</RelativeLayout>

在style.xml中弹出动画

popup Animation in style.xml

 <!-- PopuP Enter Exit Animation -->
    <style name="PopupAnimation" parent="Widget.AppCompat.PopupWindow">
        <item name="android:windowEnterAnimation">@anim/bottom_up</item>
        <item name="android:windowExitAnimation">@anim/bottom_down</item>
    </style>

Java调用PopUpWindow的方法

Java Method to call PopUpWindow

// call this method when required to show popup
    public void onShowPopup(View v){

        LayoutInflater layoutInflater = (LayoutInflater)getSystemService(Context.LAYOUT_INFLATER_SERVICE);

        // inflate the custom popup layout
        inflatedView = layoutInflater.inflate(R.layout.popup_layout, null,false);
        // find the ListView in the popup layout
        ListView listView = (ListView)inflatedView.findViewById(R.id.commentsListView);
        LinearLayout headerView = (LinearLayout)inflatedView.findViewById(R.id.headerLayout);
        // get device size
        Display display = getWindowManager().getDefaultDisplay();
        final Point size = new Point();
        display.getSize(size);
//        mDeviceHeight = size.y;
        DisplayMetrics displayMetrics = mContext.getResources().getDisplayMetrics();
        int width = displayMetrics.widthPixels;
        int height = displayMetrics.heightPixels;


        // fill the data to the list items
        setSimpleList(listView);


        // set height depends on the device size
        popWindow = new PopupWindow(inflatedView, width,height-50, true );
        // set a background drawable with rounders corners
        popWindow.setBackgroundDrawable(getResources().getDrawable(R.drawable.popup_bg));

        popWindow.setInputMethodMode(PopupWindow.INPUT_METHOD_NEEDED);
        popWindow.setHeight(WindowManager.LayoutParams.WRAP_CONTENT);

        popWindow.setAnimationStyle(R.style.PopupAnimation);

        // show the popup at bottom of the screen and set some margin at bottom ie,
        popWindow.showAtLocation(v, Gravity.BOTTOM, 0,100);
}

将列表添加到布局中的方法

Method for adding list into layout

  void setSimpleList(ListView listView){

        ArrayList<String> contactsList = new ArrayList<String>();

        for (int index = 0; index < 10; index++) {
            contactsList.add("I am @ index " + index + " today " + Calendar.getInstance().getTime().toString());
        }

        listView.setAdapter(new ArrayAdapter<String>(MainActivity.this,
                R.layout.popup_list_item, android.R.id.text1, contactsList));
    }

动画文件
bottom_up.xml

Animation File bottom_up.xml

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android">
    <translate android:fromYDelta="75%p" android:toYDelta="0%p"
        android:fillAfter="true"
        android:duration="400"/>
</set>

bottom_down.xml

bottom_down.xml

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android">

    <translate android:fromYDelta="0%p" android:toYDelta="100%p" android:fillAfter="true"
        android:interpolator="@android:anim/linear_interpolator"
        android:duration="400" />

</set>

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