问题描述
类GetDetails扩展的AsyncTask<字符串,字符串,字符串> {
@覆盖
在preExecute保护无效(){
super.on preExecute();
pDialog =新ProgressDialog(EditProduct.this);
pDialog.setMessage(Chargement Patienter ......。);
pDialog.setIndeterminate(假);
pDialog.setCancelable(真正的);
pDialog.show();
}
保护字符串doInBackground(字符串... PARAMS){
runOnUiThread(新的Runnable(){
公共无效的run(){
诠释成功;
尝试 {
名单<的NameValuePair> PARAMS =新的ArrayList<的NameValuePair>();
params.add(新BasicNameValuePair(PID,PID));
JSONObject的JSON = jsonParser.makeHtt prequest(
url_product_detials,GET,则params);
Log.d(单一产品详细信息,json.toString());
成功= json.getInt(TAG_SUCCESS);
如果(成功== 1){
JSONArray productObj = json.getJSONArray(TAG_PRODUCT);
的JSONObject产物= productObj.getJSONObject(0);
txtName的=(的EditText)findViewById(R.id.inputName);
txtLongi =(EditText上)findViewById(R.id.inputLongi);
txtLati =(EditText上)findViewById(R.id.inputLati);
txtRegion =(EditText上)findViewById(R.id.inputRegion);
txtName.setText(product.getString(TAG_NAME));
txtLongi.setText(product.getString(TAG_PRICE));
txtLati.setText(product.getString(TAG_DESCRIPTION));
txtRegion.setText(product.getString(TAG_LOCATION));
}其他{
}
}赶上(JSONException E){
e.printStackTrace();
}
}
});
返回null;
}
保护无效onPostExecute(字符串file_url){
pDialog.dismiss();
}
}
LogCat中:
11-12 22:42:12.552:E / AndroidRuntime(1100):致命异常:主要
11-12 22:42:12.552:E / AndroidRuntime(1100):android.os.NetworkOnMainThreadException
11-12 22:42:12.552:E / AndroidRuntime(1100):在android.os.StrictMode $ AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1117)
11-12 22:42:12.552:E / AndroidRuntime(1100):在libcore.io.BlockGuardOs.connect(BlockGuardOs.java:84)
11-12 22:42:12.552:E / AndroidRuntime(1100):在libcore.io.IoBridge.connectErrno(IoBridge.java:127)
11-12 22:42:12.552:E / AndroidRuntime(1100):在libcore.io.IoBridge.connect(IoBridge.java:112)
11-12 22:42:12.552:E / AndroidRuntime(1100):在java.net.PlainSocketImpl.connect(PlainSocketImpl.java:192)
11-12 22:42:12.552:E / AndroidRuntime(1100):在java.net.PlainSocketImpl.connect(PlainSocketImpl.java:459)
11-12 22:42:12.552:E / AndroidRuntime(1100):在java.net.Socket.connect(Socket.java:842)
11-12 22:42:12.552:E / AndroidRuntime(1100):在org.apache.http.conn.scheme.PlainSocketFactory.connectSocket(PlainSocketFactory.java:119)
11-12 22:42:12.552:E / AndroidRuntime(1100):在org.apache.http.impl.conn.DefaultClientConnectionOperator.openConnection(DefaultClientConnectionOperator.java:144)
11-12 22:42:12.552:E / AndroidRuntime(1100):在org.apache.http.impl.conn.AbstractPoolEntry.open(AbstractPoolEntry.java:164)
11-12 22:42:12.552:E / AndroidRuntime(1100):在org.apache.http.impl.conn.AbstractPooledConnAdapter.open(AbstractPooledConnAdapter.java:119)
11-12 22:42:12.552:E / AndroidRuntime(1100):在org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:360)
11-12 22:42:12.552:E / AndroidRuntime(1100):在org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:555)
11-12 22:42:12.552:E / AndroidRuntime(1100):在org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:487)
11-12 22:42:12.552:E / AndroidRuntime(1100):在org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:465)
11-12 22:42:12.552:E / AndroidRuntime(1100):在com.example.androidhive.JSONParser.makeHtt prequest(JSONParser.java:62)
11-12 22:42:12.552:E / AndroidRuntime(1100):在fitness.coter.serveur.EditProduct $ GetPharmacieDetails $ 1.运行(EditProduct.java:135)
11-12 22:42:12.552:E / AndroidRuntime(1100):在android.os.Handler.handleCallback(Handler.java:725)
11-12 22:42:12.552:E / AndroidRuntime(1100):在android.os.Handler.dispatchMessage(Handler.java:92)
11-12 22:42:12.552:E / AndroidRuntime(1100):在android.os.Looper.loop(Looper.java:137)
11-12 22:42:12.552:E / AndroidRuntime(1100):在android.app.ActivityThread.main(ActivityThread.java:5041)
11-12 22:42:12.552:E / AndroidRuntime(1100):在java.lang.reflect.Method.invokeNative(本机方法)
11-12 22:42:12.552:E / AndroidRuntime(1100):在java.lang.reflect.Method.invoke(Method.java:511)
11-12 22:42:12.552:E / AndroidRuntime(1100):在com.android.internal.os.ZygoteInit $ MethodAndArgsCaller.run(ZygoteInit.java:793)
11-12 22:42:12.552:E / AndroidRuntime(1100):在com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560)
11-12 22:42:12.552:E / AndroidRuntime(1100):在dalvik.system.NativeStart.main(本机方法)
11-12 22:42:18.021:I /过程(1100):发送信号。 PID:1100 SIG:9
11-12 22:42:20.212:E /跟踪(1130):错误打开跟踪文件:没有这样的文件或目录(2)
从删除你的
,这不是多么 runOnUiThread()
code doInBackground()的AsyncTask
是为了工作
runOnUiThread(新的Runnable(){
公共无效的run(){
在每一个方法的的AsyncTask
除了 doInBackground()
运行在 UI线程
。因此,做好 doInBackground网络的东西()
,并根据需要使用其他方法。
onProgressUpdate()
可用于更新 UI
执行时doInBackground( )
onPostExecute()
可用于接收来自结果doInBackground()
和更新 UI
相应
在preExecute()
可用于更新 UI
在 doInBackground()
运行的东西,如呈现出 ProgressDialog
请仔细阅读AsyncTask的文档几次。这是一开始有点棘手,但一旦你理解如何将其意味着工作,那么它可以是一个伟大的事情。
class GetDetails extends AsyncTask<String, String, String> {
@Override
protected void onPreExecute() {
super.onPreExecute();
pDialog = new ProgressDialog(EditProduct.this);
pDialog.setMessage("Chargement. Patienter ...");
pDialog.setIndeterminate(false);
pDialog.setCancelable(true);
pDialog.show();
}
protected String doInBackground(String... params) {
runOnUiThread(new Runnable() {
public void run() {
int success;
try {
List<NameValuePair> params = new ArrayList<NameValuePair>();
params.add(new BasicNameValuePair("pid", pid));
JSONObject json = jsonParser.makeHttpRequest(
url_product_detials, "GET", params);
Log.d("Single Product Details", json.toString());
success = json.getInt(TAG_SUCCESS);
if (success == 1) {
JSONArray productObj = json.getJSONArray(TAG_PRODUCT);
JSONObject product = productObj.getJSONObject(0);
txtName = (EditText) findViewById(R.id.inputName);
txtLongi = (EditText) findViewById(R.id.inputLongi);
txtLati = (EditText) findViewById(R.id.inputLati);
txtRegion = (EditText) findViewById(R.id.inputRegion);
txtName.setText(product.getString(TAG_NAME));
txtLongi.setText(product.getString(TAG_PRICE));
txtLati.setText(product.getString(TAG_DESCRIPTION));
txtRegion.setText(product.getString(TAG_LOCATION));
}else{
}
} catch (JSONException e) {
e.printStackTrace();
}
}
});
return null;
}
protected void onPostExecute(String file_url) {
pDialog.dismiss();
}
}
LogCat:
11-12 22:42:12.552: E/AndroidRuntime(1100): FATAL EXCEPTION: main
11-12 22:42:12.552: E/AndroidRuntime(1100): android.os.NetworkOnMainThreadException
11-12 22:42:12.552: E/AndroidRuntime(1100): at android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1117)
11-12 22:42:12.552: E/AndroidRuntime(1100): at libcore.io.BlockGuardOs.connect(BlockGuardOs.java:84)
11-12 22:42:12.552: E/AndroidRuntime(1100): at libcore.io.IoBridge.connectErrno(IoBridge.java:127)
11-12 22:42:12.552: E/AndroidRuntime(1100): at libcore.io.IoBridge.connect(IoBridge.java:112)
11-12 22:42:12.552: E/AndroidRuntime(1100): at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:192)
11-12 22:42:12.552: E/AndroidRuntime(1100): at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:459)
11-12 22:42:12.552: E/AndroidRuntime(1100): at java.net.Socket.connect(Socket.java:842)
11-12 22:42:12.552: E/AndroidRuntime(1100): at org.apache.http.conn.scheme.PlainSocketFactory.connectSocket(PlainSocketFactory.java:119)
11-12 22:42:12.552: E/AndroidRuntime(1100): at org.apache.http.impl.conn.DefaultClientConnectionOperator.openConnection(DefaultClientConnectionOperator.java:144)
11-12 22:42:12.552: E/AndroidRuntime(1100): at org.apache.http.impl.conn.AbstractPoolEntry.open(AbstractPoolEntry.java:164)
11-12 22:42:12.552: E/AndroidRuntime(1100): at org.apache.http.impl.conn.AbstractPooledConnAdapter.open(AbstractPooledConnAdapter.java:119)
11-12 22:42:12.552: E/AndroidRuntime(1100): at org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:360)
11-12 22:42:12.552: E/AndroidRuntime(1100): at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:555)
11-12 22:42:12.552: E/AndroidRuntime(1100): at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:487)
11-12 22:42:12.552: E/AndroidRuntime(1100): at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:465)
11-12 22:42:12.552: E/AndroidRuntime(1100): at com.example.androidhive.JSONParser.makeHttpRequest(JSONParser.java:62)
11-12 22:42:12.552: E/AndroidRuntime(1100): at fitness.coter.serveur.EditProduct$GetPharmacieDetails$1.run(EditProduct.java:135)
11-12 22:42:12.552: E/AndroidRuntime(1100): at android.os.Handler.handleCallback(Handler.java:725)
11-12 22:42:12.552: E/AndroidRuntime(1100): at android.os.Handler.dispatchMessage(Handler.java:92)
11-12 22:42:12.552: E/AndroidRuntime(1100): at android.os.Looper.loop(Looper.java:137)
11-12 22:42:12.552: E/AndroidRuntime(1100): at android.app.ActivityThread.main(ActivityThread.java:5041)
11-12 22:42:12.552: E/AndroidRuntime(1100): at java.lang.reflect.Method.invokeNative(Native Method)
11-12 22:42:12.552: E/AndroidRuntime(1100): at java.lang.reflect.Method.invoke(Method.java:511)
11-12 22:42:12.552: E/AndroidRuntime(1100): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793)
11-12 22:42:12.552: E/AndroidRuntime(1100): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560)
11-12 22:42:12.552: E/AndroidRuntime(1100): at dalvik.system.NativeStart.main(Native Method)
11-12 22:42:18.021: I/Process(1100): Sending signal. PID: 1100 SIG: 9
11-12 22:42:20.212: E/Trace(1130): error opening trace file: No such file or directory (2)
Remove your runOnUiThread()
code from doInBackground()
, that's not how AsyncTask
is meant to work
runOnUiThread(new Runnable() {
public void run() {
Every method in an AsyncTask
except for doInBackground()
runs on the UI Thread
. Therefore, do your network stuff in doInBackground()
and use the other methods as needed.
onProgressUpdate()
can be used to update the UI
during execution of doInBackground()
onPostExecute()
can be used to receive a result from doInBackground()
and update the UI
accordingly
onPreExecute()
can be used to update the UI
before doInBackground()
runs for things such as showing a ProgressDialog
Please read through the AsyncTask Docs several times. It is a little tricky at the beginning but once you understand how its meant to work then it can be a great thing.
这篇关于android.os.NetworkOnMainThreadException在android.os.StrictMode $ AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1117)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!