PopWindow带动画的向下弹出

首先建一个popwin的实体类

package dmpte.mytest;

import android.content.Context;
import android.view.LayoutInflater;
import android.view.MotionEvent;
import android.view.View;
import android.widget.PopupWindow;
import android.widget.RelativeLayout;

public class PopWin extends PopupWindow {
    private Context mContext;
    private View view;


    public PopWin(final Context mContext, View.OnClickListener itemsOnClick, int flag) {
        this.mContext = mContext;
        this.view = LayoutInflater.from(mContext).inflate(R.layout.view_popwin, null);
        // 设置外部可点击
        this.setOutsideTouchable(true);
        /* 设置弹出窗口特征 */
        // 设置视图
        this.setContentView(this.view);
        // 设置弹出窗体的宽和高
        this.setHeight(RelativeLayout.LayoutParams.WRAP_CONTENT);//高
        this.setWidth(RelativeLayout.LayoutParams.MATCH_PARENT);//宽

        // 设置弹出窗体可点击
        this.setFocusable(true);

        // 设置弹出窗体显示时的动画,从底部向上弹出
        this.setAnimationStyle(R.style.take_photo_anim);
//        mMenuView添加OnTouchListener监听判断获取触屏位置如果在选择框外面则销毁弹出框
        this.view.setOnTouchListener(new View.OnTouchListener() {
            @Override
            public boolean onTouch(View v, MotionEvent event) {
                int height = view.findViewById(R.id.pop_layout).getHeight();
                int y = (int) event.getY();
                if (event.getAction() == MotionEvent.ACTION_DOWN) {
                //Y表示手指点击的位置,屏幕顶端为0,往下一次递增。height是popwin的高度。y > height就表示手指点在popwin的外面,然后关闭popwin
                    if (y > height) {
                        dismiss();
                    }
                }
                return true;
            }

        });

    }

}

然后是这个类的布局 view_popwin.xml


<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/pop_layout"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@null"
    android:orientation="vertical">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="170dp"
        android:background="#ffff"
        android:orientation="vertical">

        <TextView
            android:id="@+id/tv_jingtai"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:layout_gravity="center"
            android:layout_marginTop="2dp"
            android:gravity="center"
            android:text="移动静态"
            android:textColor="#f123" />

    LinearLayout>
LinearLayout>

接下来是这个类里涉及的动画 popwin_anim,在res/values/styles下

然后是进场动画 pop_enter_anim和出场动画 pop_exit_anim,在res下建一个文件夹anim,分别新建上面两个xml

pop_enter_anim.xml


<set xmlns:android="http://schemas.android.com/apk/res/android"
    android:shareInterpolator="false">
    
    <translate
        android:duration="500"
        android:fromYDelta="-100%p"
        android:toYDelta="0" />
set>

pop_exit_anim.xml


<set xmlns:android="http://schemas.android.com/apk/res/android"
    android:shareInterpolator="false">
    
    <translate
        android:duration="1000"
        android:fromYDelta="0"
        android:toYDelta="-100%p" />

set>

最后是使用

//让背景变暗
                WindowManager.LayoutParams lp = getWindow().getAttributes();
                lp.alpha = 0.7f;
                getWindow().setAttributes(lp);
                //弹出窗体
                PopWin popWin_ = new PopWin(this, null, 0);
                popWin_.showAsDropDown(findViewById(R.id.relativeLayout));
                //监听popwin是否关闭,关闭的话让背景恢复
                popWin_.setOnDismissListener(new PopupWindow.OnDismissListener() {
                    @Override
                    public void onDismiss() {
                        WindowManager.LayoutParams lp = getWindow().getAttributes();
                        lp.alpha = 1f;
                        getWindow().setAttributes(lp);
                    }
                });

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