android仿微信消息長按根據(jù)觸摸位置彈出對話框

DeepReading 2019-07-04

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package com.example.administrator.myapplication;

import android.graphics.drawable.ColorDrawable;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.Gravity;
import android.view.LayoutInflater;
import android.view.MotionEvent;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ListView;
import android.widget.PopupWindow;
import android.widget.TextView;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity {
PopupWindow mPopupWindow;
int screenHeight;
int screenWidth;
int downX;
int downY;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// 獲取屏幕的高寬
screenHeight = getResources().getDisplayMetrics().heightPixels;
screenWidth = getResources().getDisplayMetrics().widthPixels;
ListView mListView = (ListView) findViewById(R.id.listview);
mListView.setAdapter(new CustomAdapter());
}

private void showPopupWindow(final View anchorView) {
View contentView = LayoutInflater.from(this).inflate(R.layout.popup_content_layout, null);
View.OnClickListener menuItemOnClickListener = new View.OnClickListener() {
@Override
public void onClick(View v) {
Toast.makeText(v.getContext(), "Click " + ((TextView) v).getText(), Toast.LENGTH_SHORT).show();
if (mPopupWindow != null) {
mPopupWindow.dismiss();
}
}
};
contentView.findViewById(R.id.menu_item1).setOnClickListener(menuItemOnClickListener);
contentView.findViewById(R.id.menu_item2).setOnClickListener(menuItemOnClickListener);
contentView.findViewById(R.id.menu_item3).setOnClickListener(menuItemOnClickListener);
contentView.findViewById(R.id.menu_item4).setOnClickListener(menuItemOnClickListener);
contentView.findViewById(R.id.menu_item5).setOnClickListener(menuItemOnClickListener);
mPopupWindow = new PopupWindow(contentView,
ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT, true);
mPopupWindow.setBackgroundDrawable(new ColorDrawable());
//計算View位置
final int windowPos[] = new int[2];
final int anchorLoc[] = new int[2];
// 獲取錨點View在屏幕上的左上角坐標位置
contentView.measure(View.MeasureSpec.UNSPECIFIED, View.MeasureSpec.UNSPECIFIED);
// 計算contentView的高寬
final int popuHeight = contentView.getMeasuredHeight();
final int popuWidth = contentView.getMeasuredWidth();
// 判斷Y坐標
if (downY > screenHeight / 2) {
//向上彈出
windowPos[1] = downY - popuHeight;
} else {
//向下彈出
windowPos[1] = downY;
}
// 判斷X坐標
if (downX > screenWidth / 2) {
//向左彈出
windowPos[0] = downX - popuWidth;
} else {
//向右彈出
windowPos[0] = downX;
}
int xOff = -20; // 調(diào)整偏移
windowPos[0] -= xOff;
mPopupWindow.showAtLocation(anchorView, Gravity.TOP | Gravity.START, windowPos[0], windowPos[1]);
}

class CustomAdapter extends BaseAdapter {
@Override
public int getCount() {
return 20;
}

@Override
public Object getItem(int position) {
return null;
}

@Override
public long getItemId(int position) {
return 0;
}

@Override
public View getView(int position, View convertView, ViewGroup parent) {
final ViewHolder viewHolder;
if (convertView == null) {
convertView = LayoutInflater.from(getBaseContext()).inflate(R.layout.listview_item, null);
viewHolder = new ViewHolder();
convertView.setTag(viewHolder);
} else {
viewHolder = (ViewHolder) convertView.getTag();
}

viewHolder.Root = convertView.findViewById(R.id.root);

viewHolder.Root.setOnTouchListener(new View.OnTouchListener() {
@Override
public boolean onTouch(View view, MotionEvent motionEvent) {
downX = (int) motionEvent.getRawX();
downY = (int) motionEvent.getRawY();
return false;
}
});
viewHolder.Root.setOnLongClickListener(new View.OnLongClickListener() {
@Override
public boolean onLongClick(View view) {
showPopupWindow(viewHolder.Root);
return false;
}
});
return convertView;
}
}

class ViewHolder {
View Root;
}
}

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas./apk/res/android"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="@drawable/button_normal_bg"
android:orientation="vertical"
android:padding="1dp">

<LinearLayout
android:layout_width="110dp"
android:layout_height="wrap_content"
android:orientation="vertical">

<TextView
android:id="@+id/menu_item1"
android:layout_width="match_parent"
android:layout_height="40dp"
android:gravity="center"
android:text="復制"
android:textColor="#000"/>

<View
android:layout_width="match_parent"
android:layout_height="0.5dp"
android:background="#ccc"/>

<TextView
android:id="@+id/menu_item2"
android:layout_width="match_parent"
android:layout_height="40dp"
android:gravity="center"
android:text="撤回"
android:textColor="#000"/>

<View
android:layout_width="match_parent"
android:layout_height="0.5dp"
android:background="#ccc"/>

<TextView
android:id="@+id/menu_item3"
android:layout_width="match_parent"
android:layout_height="40dp"
android:gravity="center"
android:text="轉(zhuǎn)發(fā)"
android:textColor="#000"/>

<View
android:layout_width="match_parent"
android:layout_height="0.5dp"
android:background="#ccc"/>

<TextView
android:id="@+id/menu_item4"
android:layout_width="match_parent"
android:layout_height="40dp"
android:gravity="center"
android:text="收藏"
android:textColor="#000"/>

<View
android:layout_width="match_parent"
android:layout_height="0.5dp"
android:background="#ccc"/>

<TextView
android:id="@+id/menu_item5"
android:layout_width="match_parent"
android:layout_height="40dp"
android:gravity="center"
android:text="刪除"
android:textColor="#000"/>

<View
android:layout_width="match_parent"
android:layout_height="0.5dp"
android:background="#ccc"/>

<TextView
android:id="@+id/menu_item6"
android:layout_width="match_parent"
android:layout_height="40dp"
android:gravity="center"
android:text="更多"
android:textColor="#000"/>
</LinearLayout>

</LinearLayout>

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas./apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/root"
>

<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_margin="15dp"
android:orientation="vertical">

<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="標題標題"
android:textColor="@android:color/black"
android:textSize="18sp" />

<TextView
android:id="@+id/tv_content"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="8dp"
android:text="內(nèi)內(nèi)容內(nèi)容測試試內(nèi)容測試測試"
android:textColor="@android:color/darker_gray"
android:textSize="14sp" />
</LinearLayout>

<LinearLayout
android:id="@+id/more_root"
android:layout_width="wrap_content"
android:layout_height="50dp"
android:gravity="center"
android:layout_marginRight="5dp"
android:layout_gravity="right|center_vertical">

<ImageView
android:id="@+id/more_imageView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="@mipmap/ic_launcher" />
</LinearLayout>

</FrameLayout>