解決ListView的The content of the adapter has changed but ListView did not receive a notification崩潰問題

阿新 • • 發佈：2019-01-26

最近在寫一個聚合工具箱的時候，添加了滑動返回功能，使用ListView時（不要問我為啥不用recycleview，小工具嘛，主要是邏輯，頁面都是次要的），遇到如下崩潰問題

java.lang.IllegalStateException: The content of the adapter has changed but ListView did not receive a notification. Make sure the content of your adapter is not modified from a background thread, but only from the UI thread. Make sure your adapter calls notifyDataSetChanged() when its content changes. [in ListView(2131296532, class android.widget.ListView) with Adapter(class android.widget.HeaderViewListAdapter)]

後來發現是資料填充和資料變更提醒不在同一執行緒導致，

原始程式碼如下：

// 向伺服器請求資料
private fun requestData(location: String) {
    Service.queryWeather(UrlConstant.WEATHER_URL, location, KeyConstant.WEATHER_KEY) { state, data ->
        swipe_layout.isRefreshing = false
	if (!state) [email protected]
        val response = JSON.parseObject(data, WeatherResponse::class.java)
        if (response.heWeather6[0].status != "ok")  
[email protected]
        list.clear()
        list.addAll(response.heWeather6[0].daily_forecast)
        updateViews(response.heWeather6[0])
    }
}

// 更新介面
private fun updateViews(data: WeatherResponse.HeWeather) {
    runOnUiThread {
        adapter.notifyDataSetChanged()
        tv_location.text = "省份:${data.basic.admin_area}  市級:${data.basic.parent_city}  地區:${location}"
        tv_latlng.text = "經度:${data.basic.lat}  緯度:${data.basic.lon}"
        tv_update_time.text = "更新時間：${data.update.loc}"
    }
}

修正後代碼如下：

// 向伺服器請求資料
private fun requestData(location: String) {
    Service.queryWeather(UrlConstant.WEATHER_URL, location, KeyConstant.WEATHER_KEY) { state, data ->
        swipe_layout.isRefreshing = false
        if (!state) [email protected]
        val response = JSON.parseObject(data, WeatherResponse::class.java)
        if (response.heWeather6[0].status != "ok") [email protected]
        updateViews(response.heWeather6[0])
    }
}

// 更新介面
private fun updateViews(data: WeatherResponse.HeWeather) {
    runOnUiThread {
        list.clear()
        list.addAll(data.daily_forecast)
        adapter.notifyDataSetChanged()
        tv_location.text = "省份:${data.basic.admin_area}  市級:${data.basic.parent_city}  地區:${location}"
        tv_latlng.text = "經度:${data.basic.lat}  緯度:${data.basic.lon}"
        tv_update_time.text = "更新時間：${data.update.loc}"
    }
}

也就是說，只需要保證資料填充和adapter.notifyDataSetChanged()在同一執行緒即可，（另外：不能在子執行緒更新UI），bug解決

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解決ListView的The content of the adapter has changed but ListView did not receive a notification崩潰問題

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