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最近在做類似微信朋友圈點(diǎn)贊評(píng)論的功能，有個(gè)點(diǎn)贊評(píng)論彈框交互，感覺效果很好，點(diǎn)擊評(píng)論按鈕彈框從按鈕左邊彈出，遇到了3個(gè)問題(彈出動(dòng)畫不對、彈框布局沒有適配、彈出的位置顯示不對)，動(dòng)畫和布局好解決，彈出的位置調(diào)試了半天，下面給出解決方法.

1.彈出動(dòng)畫

push_botton_in.xml代碼:

<?xml version="1.0" encoding="utf-8"?><set xmlns:android="http://schemas.android.com/apk/res/android">    <scale        android:duration="180"        android:fromXScale="0"        android:fromYScale="1"        android:toYScale="1"        android:pivotX="100%"        android:pivotY="50%"        android:toXScale="1" /></set>

push_bottom_out.xml代碼

<?xml version="1.0" encoding="utf-8"?><set xmlns:android="http://schemas.android.com/apk/res/android">    <scale        android:duration="180"        android:fromXScale="1"        android:pivotX="100%"        android:fromYScale="1"        android:toYScale="1"        android:pivotY="50%"        android:toXScale="0" /></set>

style樣式代碼:

<style name="anim_push_bottom" parent="@android:style/Animation">    <item name="android:windowEnterAnimation">@anim/push_bottom_in</item>    <item name="android:windowExitAnimation">@anim/push_bottom_out</item></style>

Activity的代碼：

完整的Activity代碼:

/** * @描述: 仿微信朋友圈文本顯示全文與收起 */public class MainActivity extends AppCompatActivity implements CircleAdapter.MyClickListener{    private RecyclerView recyclerView;    private CircleAdapter circleAdapter;    private String content = "茫茫的長白大山，浩瀚的原始森林，大山腳下，原始森林環(huán)抱中散落著幾十戶人家的" +            "一個(gè)小山村，茅草房，對面炕，煙筒立在屋后邊。在村東頭有一個(gè)獨(dú)立的房子，那就是青年點(diǎn)，" +            "窗前有一道小溪流過。學(xué)子在這里吃飯，由這里出發(fā)每天隨社員去地里干活。干的活要么上山伐" +            "樹，抬樹，要么砍柳樹毛子開荒種地。在山里，可聽那吆呵聲：“順山倒了！”放樹謹(jǐn)防回頭棒！" +            "樹上的枯枝打到別的樹上再蹦回來，這回頭棒打人最厲害。";    private List<String> strings;    private LikePopupWindow likePopupWindow;    private int page = 1;
    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        initViews();        initData();        initAdapter();        setListener();    }
    private void setListener() {
    }
    /**     * 初始化控件     */    private void initViews() {        recyclerView = findViewById(R.id.recyclerView);    }
    /**     * 初始化數(shù)據(jù)     * @param     */    private void initData() {        strings = new ArrayList<>();        for (int i = 0; i < 14; i++) {            strings.add(content);        }    }    /**     * 設(shè)置adapter     */    private void initAdapter() {        circleAdapter = new CircleAdapter(this, strings,this);        recyclerView.setLayoutManager(new LinearLayoutManager(this));        recyclerView.addItemDecoration(new SpaceDecoration(this));        recyclerView.setAdapter(circleAdapter);    }    @Override    public void onClick(int position,View v) {        if (likePopupWindow == null) {            likePopupWindow = new LikePopupWindow(this, 0);        }        likePopupWindow.setOnPraiseOrCommentClickListener(new OnPraiseOrCommentClickListener() {            @Override            public void onPraiseClick(int position) {                likePopupWindow.dismiss();            }            @Override            public void onCommentClick(int position) {                likePopupWindow.dismiss();            }            @Override            public void onClickFrendCircleTopBg() {            }            @Override            public void onDeleteItem(String id, int position) {            }        }).setTextView(0).setCurrentPosition(position);        if (likePopupWindow.isShowing()) {            likePopupWindow.dismiss();        } else {            likePopupWindow.showPopupWindow(v);        }    }}

彈框代碼:

** * @描述: 點(diǎn)贊評(píng)論popup */public class LikePopupWindow extends PopupWindow implements View.OnClickListener {    private Context mContext;
    private OnPraiseOrCommentClickListener mOnPraiseOrCommentClickListener;
    private int mPopupWindowHeight;    private int mPopupWindowWidth;    private int mCurrentPosition;    private TextView commentPopupText;
    public LikePopupWindow(android.content.Context context, int isLike) {        View contentView = LayoutInflater.from(context).inflate(R.layout.dialog_like, null);        this.setContentView(contentView);        contentView.findViewById(R.id.ll_like).setOnClickListener(this);        contentView.findViewById(R.id.ll_comment).setOnClickListener(this);        //不設(shè)置寬高將無法顯示popupWindow        this.mPopupWindowHeight = Utils.dp2px(40);        this.mPopupWindowWidth = Utils.dp2px(200);        this.setHeight(mPopupWindowHeight);        this.setWidth(mPopupWindowWidth);        // 設(shè)置SelectPicPopupWindow彈出窗體可點(diǎn)擊        this.setFocusable(true);        this.setOutsideTouchable(true);        //彈出動(dòng)畫        this.setAnimationStyle(R.style.anim_push_bottom);        // 刷新狀態(tài)        this.update();        // 實(shí)例化一個(gè)ColorDrawable顏色為半透明        ColorDrawable dw = new ColorDrawable(0x00000000);        this.setBackgroundDrawable(dw);        commentPopupText = contentView.findViewById(R.id.tv_like);        setTextView(isLike);    }
    public LikePopupWindow setCurrentPosition(int currentPosition) {        mCurrentPosition = currentPosition;        return this;    }
    public LikePopupWindow setTextView(int isLike) {        commentPopupText.setText(isLike == 0 ? "點(diǎn)贊" : "取消點(diǎn)贊");        return this;    }
    public LikePopupWindow setOnPraiseOrCommentClickListener(OnPraiseOrCommentClickListener onPraiseOrCommentClickListener) {        mOnPraiseOrCommentClickListener = onPraiseOrCommentClickListener;        return this;    }
    public void showPopupWindow(View anchor) {        if (anchor == null) {            return;        }        int[] location = new int[2];        anchor.getLocationOnScreen(location);        int xOffset = location[0] - mPopupWindowWidth - Utils.dp2px(10f);        int yOffset = location[1] + (anchor.getHeight() - mPopupWindowHeight) / 2;        showAtLocation(anchor, Gravity.NO_GRAVITY, xOffset, yOffset);    }
    @Override    public void onClick(View v) {        dismiss();        int i = v.getId();        if (i == R.id.ll_like) {            if (mOnPraiseOrCommentClickListener != null) {                mOnPraiseOrCommentClickListener.onPraiseClick(mCurrentPosition);            }
        } else if (i == R.id.ll_comment) {            if (mOnPraiseOrCommentClickListener != null) {                mOnPraiseOrCommentClickListener.onCommentClick(mCurrentPosition);            }        }    }}

2.Adapter的代碼:

/** * @描述: 朋友圈適配器 */public class CircleAdapter extends RecyclerView.Adapter<CircleAdapter.CircleViewHolder>{    private Context context;
    private List<String> list;    private LayoutInflater layoutInflater;    private MyClickListener myClickListener;
    public CircleAdapter(Context context, List<String> list,MyClickListener myClickListener) {        this.context = context;        this.list = list;        this.layoutInflater = LayoutInflater.from(context);        this.myClickListener = myClickListener;    }
    @NonNull    @Override    public CircleViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {        View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.item_circle,                parent, false);        CircleViewHolder circleViewHolder = new CircleViewHolder(view);        return circleViewHolder;    }
    @Override    public void onBindViewHolder(@NonNull CircleViewHolder holder, final int position) {        holder.expandTextView.setText(list.get(position));        holder.ivComment.setOnClickListener(new View.OnClickListener() {            @Override            public void onClick(View view) {                if(myClickListener != null){                    myClickListener.onClick(position,view);                }            }        });    }
    @Override    public int getItemCount() {        return list.size();    }

    public class CircleViewHolder extends RecyclerView.ViewHolder {        ExpandTextView expandTextView;        ImageView ivComment;        ImageView ivPhoto;        public CircleViewHolder(@NonNull View itemView) {            super(itemView);            expandTextView = itemView.findViewById(R.id.expand_textView);            ivComment = itemView.findViewById(R.id.iv_edit);            ivPhoto = itemView.findViewById(R.id.iv_photo);        }    }
    //點(diǎn)擊事件接口回調(diào)    public interface MyClickListener{        void onClick(int position,View v);    }}

3.工具類代碼：

4.布局代碼

activity_main.xml

<?xml version="1.0" encoding="utf-8"?><androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:app="http://schemas.android.com/apk/res-auto"    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="match_parent"    android:layout_height="match_parent">

    <androidx.recyclerview.widget.RecyclerView        android:id="@+id/recyclerView"        android:layout_width="match_parent"        android:layout_height="match_parent"        app:layout_constraintLeft_toLeftOf="parent"        app:layout_constraintRight_toRightOf="parent" />
</androidx.constraintlayout.widget.ConstraintLayout>

item_circle

<?xml version="1.0" encoding="utf-8"?><androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:app="http://schemas.android.com/apk/res-auto"    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="match_parent"    android:layout_height="wrap_content"    android:orientation="vertical"    android:padding="10dp"    tools:ignore="ResourceName">
    <ImageView        android:id="@+id/iv_photo"        android:layout_width="40dp"        android:layout_height="40dp"        android:scaleType="fitXY"        android:src="@mipmap/timg" />
    <TextView        android:id="@+id/tv_name"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_marginLeft="10dp"        android:text="一笑的小館子"        android:textColor="@color/color_8290AF"        android:textSize="14sp"        app:layout_constraintLeft_toRightOf="@+id/iv_photo" />
    <com.example.expandtextview.view.ExpandTextView        android:id="@+id/expand_textView"        android:layout_width="0dp"        android:layout_height="wrap_content"        android:layout_marginLeft="10dp"        android:ellipsize="end"        android:lineSpacingExtra="3dp"        android:maxLines="5"        android:textSize="16sp"        app:layout_constraintLeft_toRightOf="@+id/iv_photo"        app:layout_constraintRight_toRightOf="parent"        app:layout_constraintTop_toBottomOf="@+id/tv_name" />
    <ImageView        android:id="@+id/video_view"        android:layout_width="120dp"        android:layout_height="180dp"        android:layout_marginLeft="10dp"        android:layout_marginTop="4dp"        android:background="@color/colorAccent"        app:layout_constraintLeft_toRightOf="@+id/iv_photo"        app:layout_constraintTop_toBottomOf="@+id/expand_textView" />
    <ImageView        android:id="@+id/videoViewBf"        android:layout_width="50dp"        android:layout_height="50dp"        android:src="@mipmap/bf"        app:layout_constraintBottom_toTopOf="@+id/video_view"        app:layout_constraintLeft_toRightOf="@+id/video_view"        app:layout_constraintRight_toLeftOf="@+id/video_view"        app:layout_constraintTop_toBottomOf="@+id/video_view" />
    <TextView        android:id="@+id/tv_time"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_marginLeft="10dp"        android:layout_marginTop="15dp"        android:text="16小時(shí)前"        android:textColor="@color/black"        android:textSize="12sp"        app:layout_constraintLeft_toRightOf="@+id/iv_photo"        app:layout_constraintTop_toBottomOf="@+id/video_view" />
    <TextView        android:id="@+id/tv_delete"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_marginLeft="10dp"        android:layout_marginTop="15dp"        android:text="刪除"        android:textColor="@color/black"        android:textSize="12sp"        app:layout_constraintLeft_toRightOf="@+id/tv_time"        app:layout_constraintTop_toBottomOf="@+id/video_view" />
    <ImageView        android:id="@+id/iv_edit"        android:layout_width="20dp"        android:layout_height="20dp"        android:layout_marginTop="15dp"        android:src="@drawable/comments_drawable_blue"        app:layout_constraintEnd_toEndOf="parent"        app:layout_constraintTop_toBottomOf="@+id/video_view" />
</androidx.constraintlayout.widget.ConstraintLayout>

dialog_like.xml

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:app="http://schemas.android.com/apk/res-auto"    android:layout_width="match_parent"    android:layout_height="38dp"    android:background="@drawable/shape_remind"    android:gravity="center"    android:orientation="horizontal">

    <LinearLayout        android:id="@+id/ll_like"        android:layout_width="0dp"        android:layout_height="wrap_content"        android:layout_weight="1"        android:background="@drawable/selector_praise_or_comment_left_bg"        android:gravity="center"        android:orientation="horizontal">
        <ImageView            android:layout_width="20dp"            android:layout_height="wrap_content"            app:srcCompat="@drawable/heart_drawable_white" />
        <TextView            android:id="@+id/tv_like"            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:layout_marginLeft="6dp"            android:text="贊"            android:textColor="@color/white"            android:textSize="14sp" />    </LinearLayout>
    <LinearLayout        android:id="@+id/ll_comment"        android:layout_width="0dp"        android:layout_height="wrap_content"        android:layout_weight="1"        android:background="@drawable/selector_praise_or_comment_right_bg"        android:gravity="center"        android:orientation="horizontal">
        <ImageView            android:layout_width="20dp"            android:layout_height="wrap_content"            app:srcCompat="@drawable/comments_drawable_white" />
        <TextView            android:id="@+id/tv_comment"            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:layout_marginLeft="6dp"            android:text="評(píng)論"            android:textColor="@color/white" />    </LinearLayout> </LinearLayout>

selector_praise_or_comment_right_bg.xml

<?xml version="1.0" encoding="utf-8"?><selector xmlns:android="http://schemas.android.com/apk/res/android">    <item android:state_pressed="false">        <shape>            <corners android:topRightRadius="2dp" android:bottomRightRadius="2dp" />            <solid android:color="#222230" />        </shape>    </item>    <item android:state_pressed="true">        <shape>            <corners android:topRightRadius="2dp" android:bottomRightRadius="2dp"  />            <solid android:color="#000000" />        </shape>    </item></selector>

selector_praise_or_comment_left_bg.xml

<?xml version="1.0" encoding="utf-8"?><selector xmlns:android="http://schemas.android.com/apk/res/android">    <item android:state_pressed="false">        <shape>            <corners android:bottomLeftRadius="2dp" android:topLeftRadius="2dp" />            <solid android:color="#222230" />        </shape>    </item>    <item android:state_pressed="true">        <shape>            <corners android:bottomLeftRadius="2dp" android:topLeftRadius="2dp"  />            <solid android:color="#000000" />        </shape>    </item></selector>

shape_remind.xml

<?xml version="1.0" encoding="utf-8"?><shape xmlns:android="http://schemas.android.com/apk/res/android" android:shape="rectangle">    <corners android:radius="2dp" />    <solid android:color="#222230" /></shape>

5.動(dòng)畫很簡單就不分析了，布局適配的代碼核心:

根據(jù)屏幕大小動(dòng)態(tài)適配布局，這里的寬高不是固定的，小伙伴們可以根據(jù)自己的需求進(jìn)行自定義設(shè)置.

彈窗顯示的位置：

兩種方法：showAtLocation和showAsDropDown

1.showAtLocation，例如：

showAtLocation(findViewById(R.id.search_ib), Gravity.TOP | Gravity.RIGHT,10, 10);

第一個(gè)參數(shù)：這個(gè)view是要能獲取到window唯一標(biāo)示的（也就是只要能獲取到window 標(biāo)示，view是什么控件都可以），應(yīng)該是標(biāo)示這個(gè)pw添加到哪個(gè)window里面，對控制pw出現(xiàn)位置沒有影響；

第二個(gè)參數(shù)：請記住屏幕原點(diǎn)是屏幕的左上角。Gravity.TOP | Gravity.RIGHT指的就是屏幕的右上角，那么pw的中心點(diǎn)坐標(biāo)是（屏幕寬,0）。pw默認(rèn)是在屏幕的中間，也就是Gravity.LEFT表示pw的中心點(diǎn)坐標(biāo)是(0,1/2屏幕高)；

第三、四個(gè)參數(shù)：偏移量的方向與第二個(gè)參數(shù)有關(guān)。Gravity.TOP | Gravity.RIGHT，以屏幕右上角為原點(diǎn)，pw往X軸負(fù)方向偏移10個(gè)像素，往Y軸正方向偏移10個(gè)像素；如果是Gravity.BOTTOM| Gravity.LEFT，以屏幕左下角為原點(diǎn)，pw往X軸正方向偏移10個(gè)像素，往Y軸正方向偏移10個(gè)像素。設(shè)置Gravity.NO_GRAVITY的話，就相對屏幕左上角作為參照(即原點(diǎn)[0,0]是屏幕左上角),若設(shè)置Gravity.LEFT的話，則原點(diǎn)為 [0,1/2屏幕高],即[x=0,y=1/2屏幕高度];

注意：這個(gè)偏移量可以是正的，也可以是負(fù)的。無論偏移多大，pw是不會(huì)跑出屏幕。具體往軸的那個(gè)方向偏移，跟第二個(gè)參數(shù)有關(guān)，對于Gravity.CENTER的情況，偏移量負(fù)表示往軸的負(fù)方向，正往軸的正方向

2.showAsDropDown，例如：

showAsDropDown(MainActivity.this.findViewById(R.id.logo_iv),100,0)，

以R.id.logo_iv的左下角為原點(diǎn)，向X軸正方向偏移100個(gè)像素，Y軸方向偏移0個(gè)像素。

注意：這個(gè)偏移量可以是正的，也可以是負(fù)的。無論偏移多大，pw是不會(huì)跑出屏幕。

第一種方法的代碼如下:

效果圖如下:

第2種方法代碼如下：

效果圖如下:

從以上兩個(gè)圖可以明顯看出，第2個(gè)位置顯示不對，微信的點(diǎn)贊評(píng)論彈框應(yīng)該是和評(píng)論按鈕平行并在左側(cè)彈出顯示，以上就是大致步驟。

源碼地址：

https://gitee.com/jackning_admin/ExpandTextView

到這里就結(jié)束啦.

Android仿微信朋友圈點(diǎn)贊評(píng)論彈框效果