不能内螺纹创建处理程序，也没有所谓的活套。在android系统prepare（） [英] Can't create handler inside thread that has not called Looper.prepare() in android
本文介绍了不能内螺纹创建处理程序，也没有所谓的活套。在android系统prepare（）的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我越来越不能创建在异步后台任务内螺纹处理程序。下面是我的code。我做了必要的修改在谷歌搜索，但仍然错误上升后，进度条。请帮我这个。将感谢。
我的code：
私有类LongOperation1扩展的AsyncTask＆LT;弦乐，太虚，字符串＆GT; { 私人最终的WeakReference＆LT; MainActivity＆GT; mainActivityWeakRef;
ProgressDialog对话框; 公共LongOperation1（MainActivity mainActivity）{
超（）;
this.mainActivityWeakRef =新的WeakReference＆LT; MainActivity＆GT;（
主要活动）;
// this.activity = mainActivity;
} @覆盖
保护字符串doInBackground（字符串... PARAMS）{ HttpClient的HttpClient的=新DefaultHttpClient（）;
HttpPost httppost =新HttpPost（
的http：//.............php）; //这是要发送的数据
//字符串MYNAME ='阿迪尔'; //任何数据发送
// publishProgress（5）; 尝试{
//添加数据
清单＆LT;＆的NameValuePair GT; namevaluepairs中=新的ArrayList＆LT;＆的NameValuePair GT;（
1）;
nameValuePairs.add（新BasicNameValuePair（参数1，1））;
nameValuePairs.add（新BasicNameValuePair（参数2
城市））;
httppost.setEntity（新UrlEn codedFormEntity（namevaluepairs中））; //执行HTTP POST请求 ResponseHandler所＆LT;串GT; ResponseHandler所=新BasicResponseHandler（）;
字符串的响应= httpclient.execute（httppost，ResponseHandler所）; //这是一个PHP应用程序的响应
字符串reverseString =响应;
Toast.makeText（MainActivity.this，回应+ reverseString，
Toast.LENGTH_LONG）.show（）; }赶上（ClientProtocolException E）{
Toast.makeText（MainActivity.this，
CPE响应+ e.toString（），Toast.LENGTH_LONG）
。显示（）;
// TODO自动生成catch块
}赶上（IOException异常五）{
Toast.makeText（MainActivity.this，
IOE响应+ e.toString（），Toast.LENGTH_LONG）
。显示（）;
// TODO自动生成catch块
}
返回全部完成！ } @覆盖
保护无效onPostExecute（字符串结果）{
Log.d（onpostexecute（mainActivityWeakRef.get（）= NULL）+！）;
如果（mainActivityWeakRef.get（）！=空
＆功放;＆安培; ！mainActivityWeakRef.get（）。isFinishing（））{ AlertDialog alertDialog =新AlertDialog.Builder（
。mainActivityWeakRef.get（））创建（）;
alertDialog.setTitle（结果）;
alertDialog.setMessage（关于执行后）;
alertDialog.setCancelable（假）;
alertDialog.setButton（AlertDialog.BUTTON_POSITIVE，OK，
新DialogInterface.OnClickListener（）{
公共无效的onClick（DialogInterface对话框，
其中INT）{
dialog.dismiss（）;
}
}）; alertDialog.show（）;
} } @覆盖
保护无效onProgressUpdate（虚空......值）{
super.onProgressUpdate（值）;
dialog.incrementProgressBy（5）;
}
}
解决方案
由于您所需要的UIThread向他们展示你不能使用面包在后台操作的事情。 Instean这样做，因为你做的。使用一个变量的保存它为不同的状态。
在onPostExecute检查变量，并显示相应的吐司。
希望它帮助。
I am getting can't create handler inside thread in asynchronous background task. Below is my code. I made the necessary modifications to progress bar after searching in google but still the error is rising. Please help me with this. Will be thankful.
My code:
private class LongOperation1 extends AsyncTask<String, Void, String> {
private final WeakReference<MainActivity> mainActivityWeakRef;
ProgressDialog dialog;
public LongOperation1(MainActivity mainActivity) {
super();
this.mainActivityWeakRef = new WeakReference<MainActivity>(
mainActivity);
// this.activity = mainActivity;
}
@Override
protected String doInBackground(String... params) {
HttpClient httpclient = new DefaultHttpClient();
HttpPost httppost = new HttpPost(
"http://.............php");
// This is the data to send
// String MyName = 'adil'; //any data to send
// publishProgress(5);
try {
// Add your data
List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>(
1);
nameValuePairs.add(new BasicNameValuePair("param1", "1"));
nameValuePairs.add(new BasicNameValuePair("param2",
"Cities"));
httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
// Execute HTTP Post Request
ResponseHandler<String> responseHandler = new BasicResponseHandler();
String response = httpclient.execute(httppost, responseHandler);
// This is the response from a php application
String reverseString = response;
Toast.makeText(MainActivity.this, "response" + reverseString,
Toast.LENGTH_LONG).show();
} catch (ClientProtocolException e) {
Toast.makeText(MainActivity.this,
"CPE response " + e.toString(), Toast.LENGTH_LONG)
.show();
// TODO Auto-generated catch block
} catch (IOException e) {
Toast.makeText(MainActivity.this,
"IOE response " + e.toString(), Toast.LENGTH_LONG)
.show();
// TODO Auto-generated catch block
}
return "All Done!";
}
@Override
protected void onPostExecute(String result) {
Log.d("onpostexecute", (mainActivityWeakRef.get() != null) + "");
if (mainActivityWeakRef.get() != null
&& !mainActivityWeakRef.get().isFinishing()) {
AlertDialog alertDialog = new AlertDialog.Builder(
mainActivityWeakRef.get()).create();
alertDialog.setTitle(result);
alertDialog.setMessage("On post execute");
alertDialog.setCancelable(false);
alertDialog.setButton(AlertDialog.BUTTON_POSITIVE, "OK",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog,
int which) {
dialog.dismiss();
}
});
alertDialog.show();
}
}
@Override
protected void onProgressUpdate(Void... values) {
super.onProgressUpdate(values);
dialog.incrementProgressBy(5);
}
}
解决方案
You cannot use Toast in the do in background operation because you need the UIThread to show them. Instean of doing that as you did. Use a variable an save it for different states.
In onPostExecute check the variable and show the corresponding Toast.
Hope it helps.
这篇关于不能内螺纹创建处理程序，也没有所谓的活套。在android系统prepare（）的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
查看全文
