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Android使用协程实现自定义Toast

Android使用协程实现自定义Toast

​ 最近有个消息提示需要显示10s,刚开始使用协程写了一个shoowToast方法,传入消息内容、显示时间和toast显示类型即可,以为能满足需求,结果测试说只有5s,查看日志和源码发现Android系统中Toast显示有2种类型Toast.LENGTH_SHORTToast.LENGTH_LONG,分别代表Toast消息显示的时间为短暂(大约2秒)和长时间(大约3.5秒),这和我们所需要的还是有很大差距的,于是通过自定义WindowManager+协程方式实现了此需求.

在这里插入图片描述

1.showToast方法如下:

object ToastUtils {
    private var toastJob :Job ?= null

   fun Context.showToast(message: String, duration: Int = Toast.LENGTH_SHORT, delayTime: Long = 2000L) {
        val toast = Toast.makeText(this@showToast, message, duration)
        toast.show()

   
        toastJob?.cancel()
        toastJob = CoroutineScope(Dispatchers.Main).launch {
            delay(delayTime)
            toast.cancel()
        }
    }
}

2.使用示例:

    private fun initViews() {
        val textView = findViewById<TextView>(R.id.tv_test)
        textView.setOnClickListener {
            mCountdownJob = countDownCoroutines(10, lifecycleScope,
                onTick = { second ->
                    textView.text = buildString {
                        append(second)
                        append("s后重发")
                    }
                }, onStart = {
                    // 倒计时开始
                }, onFinish = {
                    // 倒计时结束,重置状态
                    textView.text = buildString {
                        append("发送验证码")
                    }
                })

            showToast("祝大家国庆节快乐,万事如意",1,1000L * 10)
        }
    }

3.实现的效果如下:

可以看到虽然显示了Toast,但是5s就消失了,设置显示时间和动态传入10s都是不行的。
在这里插入图片描述

4.自定义Toast弹框(协程):

使用协程实现

package com.cloud.customtoastdemo.toast

import android.content.Context
import android.graphics.PixelFormat
import android.util.Log
import android.view.LayoutInflater
import android.view.View
import android.view.WindowManager
import android.widget.TextView
import com.cloud.customtoastdemo.R
import kotlinx.coroutines.CoroutineScope
import kotlinx.coroutines.Dispatchers
import kotlinx.coroutines.Job
import kotlinx.coroutines.delay
import kotlinx.coroutines.launch

/**
 * @auth: njb
 * @date: 2024/10/13 16:56
 * @desc: 描述
 */
object EasyToast {
    private var easyToastView: View? = null
    private var windowManager: WindowManager? = null
    private var mToastJob:Job ?= null
    private val TAG = "EasyToast"
    /**
     *
     * @param context 上下文
     * @param message 提示内容消息
     * @param duration 可动态设置在的显示时间
     * @param gravity 显示位置 top、center、bottom
     */
    fun showCustomToast(context: Context, message: String, duration: Int, gravity: Int) {
        windowManager = context.getSystemService(Context.WINDOW_SERVICE) as WindowManager
        val inflater = context.getSystemService(Context.LAYOUT_INFLATER_SERVICE) as LayoutInflater

        if (easyToastView == null) {
            easyToastView = inflater.inflate(R.layout.custom_easy_toast, null)
            val textView = easyToastView?.findViewById<TextView>(R.id.tv_message)
            textView?.text = message
        }

        val params = WindowManager.LayoutParams(
            WindowManager.LayoutParams.WRAP_CONTENT,
            WindowManager.LayoutParams.WRAP_CONTENT,
            WindowManager.LayoutParams.TYPE_APPLICATION,
            WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE,
            PixelFormat.TRANSLUCENT
        )

        params.gravity = gravity
        params.x = 0
        params.y = 0

        if (easyToastView?.parent == null) {
            windowManager?.addView(easyToastView, params)
        }
        mToastJob?.cancel()
        mToastJob = CoroutineScope(Dispatchers.Main).launch {
            delay(duration.toLong())
            Log.d(TAG, "时间到了结束弹框$duration")
            if (easyToastView != null) {
                windowManager?.removeView(easyToastView)
                easyToastView = null
            }
        }
    }

    fun cancelEasyToast() {
        if (easyToastView != null) {
            windowManager?.removeView(easyToastView)
            easyToastView = null
        }
        mToastJob?.cancel()
    }
}

5.自定义Toast弹框(Handler):

使用Handler实现:

package com.cloud.customtoastdemo.toast

import android.content.Context
import android.graphics.PixelFormat
import android.os.Handler
import android.os.Looper
import android.view.LayoutInflater
import android.view.View
import android.view.WindowManager
import android.widget.TextView
import com.cloud.customtoastdemo.R

/**

 * @auth: njb

 * @date: 2024/10/13 16:56

 * @desc: 描述
   */
   object EasyToast {
   private var toastView: View? = null
   private var easyToastView: View? = null
   private var windowManager: WindowManager? = null
   private val handler = Handler(Looper.getMainLooper())
   private lateinit var runnable: Runnable

   /**
    *

    * @param context 上下文

    * @param message 提示内容

    * @param message 提示内容消息

    * @param duration 显示时间

    * @param gravity 显示位置

    * @param gravity 显示位置 top、center、bottom
      */
      fun showToast(context: Context, message: String, duration: Int, gravity: Int) {
      windowManager = context.getSystemService(Context.WINDOW_SERVICE) as WindowManager
      val inflater = context.getSystemService(Context.LAYOUT_INFLATER_SERVICE) as LayoutInflater

      if (toastView == null) {
          toastView = inflater.inflate(R.layout.custom_toast, null)
          val textView = toastView?.findViewById<TextView>(R.id.tv_message)
      if (easyToastView == null) {
          easyToastView = inflater.inflate(R.layout.custom_toast, null)
          val textView = easyToastView?.findViewById<TextView>(R.id.tv_message)
          textView?.text = message
      }

      val params = WindowManager.LayoutParams(
          WindowManager.LayoutParams.WRAP_CONTENT,
          WindowManager.LayoutParams.WRAP_CONTENT,
          WindowManager.LayoutParams.TYPE_APPLICATION,
          WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE,
          PixelFormat.TRANSLUCENT
      )

      params.gravity = gravity
      params.x = 0
      params.y = 0

      if (toastView?.parent == null) {
          windowManager?.addView(toastView, params)
      if (easyToastView?.parent == null) {
          windowManager?.addView(easyToastView, params)
      }

      runnable = Runnable {
          if (toastView != null) {
              windowManager?.removeView(toastView)
              toastView = null
          if (easyToastView != null) {
              windowManager?.removeView(easyToastView)
              easyToastView = null
          }
          handler.removeCallbacks(runnable)
      }
      handler.postDelayed(runnable!!, duration.toLong())
      }

   fun cancelEasyToast() {
       runnable?.let {
           handler.removeCallbacks(it)
       }
       if (toastView != null) {
           windowManager?.removeView(toastView)
           toastView = null
       if (easyToastView != null) {
           windowManager?.removeView(easyToastView)
           easyToastView = null
       }
   }
   }

6.使用示例:

package com.cloud.customtoastdemo

import android.os.Bundle
import android.util.Log
import android.view.Gravity
import android.widget.TextView
import androidx.activity.enableEdgeToEdge
import androidx.appcompat.app.AppCompatActivity
import androidx.core.view.ViewCompat
import androidx.core.view.WindowInsetsCompat
import androidx.lifecycle.lifecycleScope
import com.cloud.customtoastdemo.contants.Constants
import com.cloud.customtoastdemo.toast.EasyToast
import com.cloud.customtoastdemo.toast.ToastUtils.showToast
import com.cloud.customtoastdemo.utils.CountDownUtils.countDownCoroutines
import kotlinx.coroutines.Job
import kotlinx.coroutines.delay
import kotlinx.coroutines.launch

class MainActivity : AppCompatActivity() {

private var mCountdownJob: Job? = null
private val TAG = "MainActivity"
override fun onCreate(savedInstanceState: Bundle?) {
    super.onCreate(savedInstanceState)
    enableEdgeToEdge()
    setContentView(R.layout.activity_main)
    ViewCompat.setOnApplyWindowInsetsListener(findViewById(R.id.main)) { v, insets ->
        val systemBars = insets.getInsets(WindowInsetsCompat.Type.systemBars())
        v.setPadding(systemBars.left, systemBars.top, systemBars.right, systemBars.bottom)
        insets
    }
    initViews()
}

private fun initViews() {
    val textView = findViewById<TextView>(R.id.tv_test)
    textView.setOnClickListener {
        mCountdownJob = countDownCoroutines(10, lifecycleScope,

            onTick = { second ->
                Log.d(TAG, "toast显示时间$second")

                textView.text = buildString {
                    append(second)
                    append("s后重发")
                }
            }, onStart = {
                // 倒计时开始
            }, onFinish = {
                // 倒计时结束,重置状态
                textView.text = buildString {
                    append("发送验证码")
                }
            })

/*
lifecycleScope.launch {
delay(1000)
showToast(“祝大家国庆节快乐,万事如意”,1,1000L * 10)
}
*/

        EasyToast.showCustomToast(
            this@MainActivity,
            message = buildString {
                append("祝大家国庆节快乐,万事如意")
            },
            duration = Constants.TOAST_SHOW_TIME,
            gravity = Gravity.TOP
        )
    }
}

}

7.实现效果如下:

在这里插入图片描述

在这里插入图片描述

8.日志打印:

在这里插入图片描述

在这里插入图片描述

9.总结:

从上面的截图可以看出基本上是满足要求的,显示了10sToast提示才消失,至于这个显示时间你可以根据自己的需求动态设置,我这里也没有设置默认时长,尝试过利用反射修改Toast的显示时间和协程delpay方式设置显示时间都没有生效,所以采用WindowManager+协程的方式,当然使用Handler+dialog也可以,今天的内容就到这里,如何实现动态显示Toast时长,打卡收工,关机睡觉.

10.demo地址如下:

https://gitee.com/jackning_admin/custom-toast-demo


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