Android Stuido中实现点击按钮弹出气泡

今天和大家分享一下实现Android Studio实现点击按钮弹出气泡的实现过程。一开始制作的时候我也不知道具体怎么实现，但是网上看了一些代码之后自己尝试了之后终于实现了这个功能，使用PopWindow就可以实现气泡的谈弹出。

实现效果图

实现代码如下

MainActivity

package com.example.qipao;

import android.app.Activity;
import android.graphics.Point;
import android.os.Bundle;
import android.view.View;
import android.view.WindowManager;
import android.widget.Button;
import android.widget.PopupWindow;
import android.widget.SeekBar;
import android.widget.TextView;

public class MainActivity extends Activity implements SeekBar.OnSeekBarChangeListener {

    PopupWindow mPopupWindow;
    private Button button;
    Point mPoint = new Point();
    private SeekBar seekbar;
    private TextView text;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        final WindowManager manager = (WindowManager) getSystemService(WINDOW_SERVICE);
        manager.getDefaultDisplay().getSize(mPoint);

        setContentView(R.layout.activity_main);

        //使用View.inflate来加载气泡布局
        View view = View.inflate(getApplicationContext(), R.layout.layout,null);

        //得到气泡中的控件view.findViewById,不能直接使用findViewById
        seekbar = (SeekBar)view.findViewById(R.id.seekbar);
        text = (TextView) view.findViewById(R.id.text23);

        seekbar.setOnSeekBarChangeListener(this);


        mPopupWindow = new PopupWindow(view,1000,800);

        mPopupWindow.setFocusable(true);//设置气泡内空间可以点击
        mPopupWindow.setOutsideTouchable(true);//可以获得焦点
        mPopupWindow.setTouchable(true);//点击气泡外可以dismiss气泡

        button = (Button)findViewById(R.id.button);


        button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {

 //             new PopClass(MainActivity.this,v,mPoint.y);

                if (mPopupWindow.isShowing()){//如果气泡已经存在则dismiss气泡
                    mPopupWindow.dismiss();
                }
                else {
                    //更具按钮的位置来了控制气泡弹出的位置
                    mPopupWindow.showAsDropDown(v,-820+v.getWidth()/2,mPoint.y/2+200);
                }
            }
        });



    }


    @Override
    public void onProgressChanged(SeekBar seekBar, int i, boolean b) {
            switch (seekBar.getId()){
                case R.id.seekbar:
                    text.setText("温度报警阈值:"+i+"℃");
                    break;
            }
    }

    @Override
    public void onStartTrackingTouch(SeekBar seekBar) {

    }

    @Override
    public void onStopTrackingTouch(SeekBar seekBar) {

    }
}

mainactivity.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout 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"
    android:background="@android:color/background_dark"
    tools:context=".MainActivity">

    <Button
        android:id="@+id/button"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerInParent="true"
        android:text="温度"
        ></Button>
</RelativeLayout>

layout.xml

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

    <com.example.qipao.PopView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        ></com.example.qipao.PopView>

    <TextView
        android:id="@+id/text23"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="70dp"
        android:text="温度报警阈值:100℃"
        android:gravity="center"
        android:layout_centerHorizontal="true"
        android:textSize="20dp"></TextView>

    <SeekBar
        android:id="@+id/seekbar"
        android:layout_width="500dp"
        android:layout_height="20dp"
        android:layout_marginTop="100dp"
        android:layout_marginLeft="20dp"
        ></SeekBar>
</RelativeLayout>

PopView

package com.example.qipao;

import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Path;
import android.graphics.RectF;
import android.util.AttributeSet;
import android.view.View;

import androidx.annotation.Nullable;

public class PopView extends View {
    Paint mPaint = new Paint();
    RectF mRectF = new RectF(50, 200, 1000, 400);

    public PopView(Context context, @Nullable AttributeSet attrs) {
        super(context, attrs);


    }

    @Override
    protected void onDraw(Canvas canvas) {
        mPaint.setAntiAlias(true);
        mPaint.setColor(Color.parseColor("#60FFFFFF"));
        mPaint.setDither(true);
        canvas.drawRoundRect(mRectF, 25, 25, mPaint);

        Path path = new Path();
        path.moveTo(800,200);
        path.lineTo(820,100);
        path.lineTo(840,200);
        path.close();
        canvas.drawPath(path,mPaint);

    }
}

https://download.csdn.net/download/weixin_44223883/12205040