Android BadgeView未读信息红点提醒？

效果图：

1.在lib中添加Jar包（badgeview.jar）并在build中添加

//添加badgeview框架
implementation files('libs/badgeview.jar')

2.xml布局

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:gravity="center_horizontal"
    android:orientation="vertical" >

    <TextView
        android:id="@+id/tv1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="20dp"
        android:text="hello_world" />

    <Button
        android:id="@+id/btn1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="20dp"
        android:text="Button" />

    <ImageView
        android:id="@+id/imageView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="20dp"
        android:src="@mipmap/ic_launcher" />

    <LinearLayout
        android:id="@+id/layout1"
        android:layout_width="100dp"
        android:layout_height="100dp"
        android:layout_marginTop="20dp"
        android:background="#E0EEE0"
        android:orientation="vertical" >
    </LinearLayout>

</LinearLayout>

3.Activity调用

package com.ruidde.pictureselectordemo;

import android.app.Activity;
import android.content.Context;
import android.graphics.Color;
import android.graphics.Typeface;
import android.os.Bundle;
import android.view.Gravity;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.TextView;

import com.jauker.widget.BadgeView;

public class MainActivity extends Activity {
    private Context mContext;
    private TextView textView;
    private Button btn;
    private ImageView imageView;
    private LinearLayout layout;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        mContext = this;
        initData();
    }

    private void initData() {
        textView = (TextView) findViewById(R.id.tv1);
        btn = (Button) findViewById(R.id.btn1);
        imageView = (ImageView) findViewById(R.id.imageView1);
        layout = (LinearLayout) findViewById(R.id.layout1);


        BadgeView badgeView = new com.jauker.widget.BadgeView(this);
        badgeView.setTargetView(textView);
        badgeView.setBadgeCount(3);

        badgeView = new BadgeView(this);
        badgeView.setTargetView(btn);
        badgeView.setBadgeCount(-7);

        // 图片貌似不能使用badgeview
        badgeView = new BadgeView(this);
        badgeView.setTargetView(imageView);

        badgeView.setBadgeCount(0);

        badgeView = new BadgeView(this);
        badgeView.setTargetView(layout);
        badgeView.setBackground(12, Color.parseColor("#9b2eef"));
        badgeView.setText("提示");

        badgeView = new BadgeView(this);
        badgeView.setTargetView(layout);
        badgeView.setBadgeGravity(Gravity.BOTTOM | Gravity.CENTER);
        badgeView.setBadgeCount(4);

        badgeView = new BadgeView(this);
        badgeView.setTargetView(layout);
        badgeView.setBadgeGravity(Gravity.CENTER);
        badgeView.setBackgroundColor(Color.RED); //在设置背景颜色 ,不设置倒角时，背景为矩形（如果不设置背景颜色，默认是圆形且颜色是橘红色）
        badgeView.setBadgeMargin(-1);  //  设置显示位置距上下左右的距离
        badgeView.setTextColor(Color.BLACK);
        badgeView.setBadgeCount(10);

        badgeView = new BadgeView(this);
        badgeView.setTargetView(layout); //设置哪个控件显示数字提醒，参数就是一个view对象
        badgeView.setBadgeGravity(Gravity.LEFT | Gravity.CENTER);// 设置badgeview的显示位置
        badgeView.setBackground(20, Color.RED); //第一个参数：背景圆的倒角  ，第二个参数：背景圆的颜色
        badgeView.setTextColor(Color.BLACK); //设置提醒的数字的字体颜色
        badgeView.setBadgeCount(-6);  //设置提醒的数字

        badgeView = new BadgeView(this);
        badgeView.setTargetView(layout);
        badgeView.setBadgeGravity(Gravity.TOP | Gravity.LEFT);
        badgeView.setTypeface(Typeface.create(Typeface.SANS_SERIF, Typeface.ITALIC)); // 设置显示的字体
        badgeView.setShadowLayer(2, -1, -1, Color.GREEN); // 设置字体的阴影
        badgeView.setBadgeMargin(5); //  设置显示位置距上下左右的距离
        badgeView.setBadgeCount(2);

    }


}

4.下载地址：https://download.csdn.net/download/yyxhzdm/12879565