case R.id.bus_item:
new GetProductDetails().execute();
CharSequence coordinates[] = {tvlat.getText(),tvlong.getText()};
double lat = Double.parseDouble((String) coordinates[0]);
double lng = Double.parseDouble((String) coordinates[1]);
GeoPoint p = new GeoPoint((int)(lat * 1E6),(int)(lng * 1E6));
mc.animateTo(p);
mc.setZoom(18);
mapView.invalidate();
内沃克代码
class GetProductDetails extends AsyncTask<String, String, String> {
/**
* Before starting background thread Show Progress Dialog
* */
@Override
protected void onPreExecute() {
super.onPreExecute();
pDialog = new ProgressDialog(MapSimple.this);
pDialog.setMessage("Loading location details. Please wait...");
pDialog.setIndeterminate(false);
pDialog.setCancelable(true);
pDialog.show();
}
/**
* Getting product details in background thread
* */
protected String doInBackground(String... params) {
// updating UI from Background Thread
runOnUiThread(new Runnable() {
public void run() {
// Check for success tag
int success;
try {
// Building Parameters
List<NameValuePair> params = new ArrayList<NameValuePair>();
//params.add(new BasicNameValuePair("pid", pid));
// getting product details by making HTTP request
// Note that product details url will use GET request
JSONObject json = jsonParser.makeHttpRequest(
url_product_detials, "GET", params);
// check your log for json response
Log.d("Single Product Details", json.toString());
// json success tag
success = json.getInt(TAG_SUCCESS);
if (success == 1) {
// successfully received product details
JSONArray productObj = json
.getJSONArray(TAG_LOCATION); // JSON Array
// get first product object from JSON Array
JSONObject product = productObj.getJSONObject(0);
// product with this pid found
// Edit Text
//txtName = (EditText) findViewById(R.id.inputName);
tvlat = (TextView)findViewById(R.id.tv_lat1);
tvlong = (TextView)findViewById(R.id.tv_long1);
// display product data in EditText
tvlat.setText(product.getString(TAG_LAT));
tvlong.setText(product.getString(TAG_LONG));
}else{
// product with pid not found
}
} catch (JSONException e) {
e.printStackTrace();
}
}
});
return null;
}
/**
* After completing background task Dismiss the progress dialog
* **/
protected void onPostExecute(String file_url) {
// dismiss the dialog once got all details
pDialog.dismiss();
}
}
日志猫
12-04 09:41:22.038: W/dalvikvm(841): threadid=1: thread exiting with uncaught exception (group=0x409c01f8)
12-04 09:41:22.088: E/AndroidRuntime(841): FATAL EXCEPTION: main
12-04 09:41:22.088: E/AndroidRuntime(841): android.os.NetworkOnMainThreadException
12-04 09:41:22.088: E/AndroidRuntime(841): at android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1099)
12-04 09:41:22.088: E/AndroidRuntime(841): at libcore.io.BlockGuardOs.connect(BlockGuardOs.java:84)
12-04 09:41:22.088: E/AndroidRuntime(841): at libcore.io.IoBridge.connectErrno(IoBridge.java:127)
12-04 09:41:22.088: E/AndroidRuntime(841): at libcore.io.IoBridge.connect(IoBridge.java:112)
12-04 09:41:22.088: E/AndroidRuntime(841): at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:192)
12-04 09:41:22.088: E/AndroidRuntime(841): at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:459)
12-04 09:41:22.088: E/AndroidRuntime(841): at java.net.Socket.connect(Socket.java:842)
12-04 09:41:22.088: E/AndroidRuntime(841): at org.apache.http.conn.scheme.PlainSocketFactory.connectSocket(PlainSocketFactory.java:119)
12-04 09:41:22.088: E/AndroidRuntime(841): at org.apache.http.impl.conn.DefaultClientConnectionOperator.openConnection(DefaultClientConnectionOperator.java:144)
12-04 09:41:22.088: E/AndroidRuntime(841): at org.apache.http.impl.conn.AbstractPoolEntry.open(AbstractPoolEntry.java:164)
12-04 09:41:22.088: E/AndroidRuntime(841): at org.apache.http.impl.conn.AbstractPooledConnAdapter.open(AbstractPooledConnAdapter.java:119)
12-04 09:41:22.088: E/AndroidRuntime(841): at org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:360)
12-04 09:41:22.088: E/AndroidRuntime(841): at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:555)
12-04 09:41:22.088: E/AndroidRuntime(841): at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:487)
12-04 09:41:22.088: E/AndroidRuntime(841): at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:465)
12-04 09:41:22.088: E/AndroidRuntime(841): at com.aunsync_alpha.JSONParser.makeHttpRequest(JSONParser.java:62)
12-04 09:41:22.088: E/AndroidRuntime(841): at com.aunsync_alpha.MapSimple$GetProductDetails$1.run(MapSimple.java:135)
12-04 09:41:22.088: E/AndroidRuntime(841): at android.os.Handler.handleCallback(Handler.java:605)
12-04 09:41:22.088: E/AndroidRuntime(841): at android.os.Handler.dispatchMessage(Handler.java:92)
12-04 09:41:22.088: E/AndroidRuntime(841): at android.os.Looper.loop(Looper.java:137)
12-04 09:41:22.088: E/AndroidRuntime(841): at android.app.ActivityThread.main(ActivityThread.java:4424)
12-04 09:41:22.088: E/AndroidRuntime(841): at java.lang.reflect.Method.invokeNative(Native Method)
12-04 09:41:22.088: E/AndroidRuntime(841): at java.lang.reflect.Method.invoke(Method.java:511)
12-04 09:41:22.088: E/AndroidRuntime(841): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
12-04 09:41:22.088: E/AndroidRuntime(841): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
12-04 09:41:22.088: E/AndroidRuntime(841): at dalvik.system.NativeStart.main(Native Method)
代码返回主线程上的网络错误。但是代码中有一个异步。请帮忙。
tvlat = (TextView)findViewById(R.id.tv_lat1);
tvlong = (TextView)findViewById(R.id.tv_long1);
// display product data in EditText
tvlat.setText(product.getString(TAG_LAT));
tvlong.setText(product.getString(TAG_LONG));
在这里,您将绑定访问doInBackground中的Ui 元素TextView。 所以在onPostExecute
AsyncTask
方法中移动这一行:
从doInBackground中删除runOnUiThread将所有Ui elemets移动到onPostExecute.change your code:
class GetProductDetails extends AsyncTask<String, String, Arraylist<String>> {
/**
* Before starting background thread Show Progress Dialog
* */
@Override
protected void onPreExecute() {
super.onPreExecute();
pDialog = new ProgressDialog(MapSimple.this);
pDialog.setMessage("Loading location details. Please wait...");
pDialog.setIndeterminate(false);
pDialog.setCancelable(true);
pDialog.show();
}
/**
* Getting product details in background thread
* */
protected Arraylist<String> doInBackground(String... params) {
Arraylist<String> arraylist=new Arraylist<String>();
// Check for success tag
int success;
try {
// Building Parameters
List<NameValuePair> params = new ArrayList<NameValuePair>();
//params.add(new BasicNameValuePair("pid", pid));
// getting product details by making HTTP request
// Note that product details url will use GET request
JSONObject json = jsonParser.makeHttpRequest(
url_product_detials, "GET", params);
// check your log for json response
Log.d("Single Product Details", json.toString());
// json success tag
success = json.getInt(TAG_SUCCESS);
if (success == 1) {
// successfully received product details
JSONArray productObj = json
.getJSONArray(TAG_LOCATION); // JSON Array
// get first product object from JSON Array
JSONObject product = productObj.getJSONObject(0);
// product with this pid found
// display product data in EditText
arraylist.add(TAG_LAT);
arraylist.add(TAG_LONG);
}else{
// product with pid not found
}
} catch (JSONException e) {
e.printStackTrace();
}
return arraylist;
}
/**
* After completing background task Dismiss the progress dialog
* **/
protected void onPostExecute(Arraylist<String> arraylist) {
// dismiss the dialog once got all details
// Edit Text
//txtName = (EditText) findViewById(R.id.inputName);
tvlat = (TextView)findViewById(R.id.tv_lat1);
tvlong = (TextView)findViewById(R.id.tv_long1);
tvlat.setText(product.getString(arraylist.get(0)));
tvlong.setText(product.getString(arraylist.get(1)));
pDialog.dismiss();
}
}
不要使用 runOnUiThread。您的 doInBackground 方法应如下所示:
protected String doInBackground(String... params) {
int success;
try {
// Building Parameters
List<NameValuePair> params = new ArrayList<NameValuePair>();
//params.add(new BasicNameValuePair("pid", pid));
// getting product details by making HTTP request
// Note that product details url will use GET request
JSONObject json = jsonParser.makeHttpRequest(
url_product_detials, "GET", params);
// check your log for json response
Log.d("Single Product Details", json.toString());
// json success tag
success = json.getInt(TAG_SUCCESS);
if (success == 1) {
// successfully received product details
JSONArray productObj = json
.getJSONArray(TAG_LOCATION); // JSON Array
// get first product object from JSON Array
JSONObject product = productObj.getJSONObject(0);
}else{
// product with pid not found
}
} catch (JSONException e) {
e.printStackTrace();
}
return null;
}
您不能在doInBackground
中使用runOnUiThread
的方法...修改 UI 的部分应移至 onPostExecute
..
应该是..
class GetProductDetails extends AsyncTask<String, String, String> {
int success;
/**
* Before starting background thread Show Progress Dialog
* */
@Override
protected void onPreExecute() {
super.onPreExecute();
pDialog = new ProgressDialog(MapSimple.this);
pDialog.setMessage("Loading location details. Please wait...");
pDialog.setIndeterminate(false);
pDialog.setCancelable(true);
pDialog.show();
}
/**
* Getting product details in background thread
* */
protected String doInBackground(String... params) {
// updating UI from Background Thread
try {
// Building Parameters
List<NameValuePair> params = new ArrayList<NameValuePair>();
//params.add(new BasicNameValuePair("pid", pid));
// getting product details by making HTTP request
// Note that product details url will use GET request
JSONObject json = jsonParser.makeHttpRequest(
url_product_detials, "GET", params);
// check your log for json response
Log.d("Single Product Details", json.toString());
// json success tag
success = json.getInt(TAG_SUCCESS);
if (success == 1) {
// successfully received product details
JSONArray productObj = json
.getJSONArray(TAG_LOCATION); // JSON Array
// get first product object from JSON Array
JSONObject product = productObj.getJSONObject(0);
}else{
// product with pid not found
}
} catch (JSONException e) {
e.printStackTrace();
}
return null;
}
/**
* After completing background task Dismiss the progress dialog
* **/
protected void onPostExecute(String file_url) {
// dismiss the dialog once got all details
pDialog.dismiss();
if (success == 1) {// product with this pid found
// Edit Text
//txtName = (EditText) findViewById(R.id.inputName);
tvlat = (TextView)findViewById(R.id.tv_lat1);
tvlong = (TextView)findViewById(R.id.tv_long1);
// display product data in EditText
tvlat.setText(product.getString(TAG_LAT));
tvlong.setText(product.getString(TAG_LONG));
}
}
}
您不能在 doInBackground
中使用runOnUiThread
的方法,UI
修改应移至 onPostExecute
。
谢谢。。。