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