我正在使用 google place api 并想获取最近的餐厅和咖啡馆，但是当我使用进度条获取该数据时出现一个错误
class LoadPlaces extends AsyncTask<String, String, String> {
/**
* Before starting background thread Show Progress Dialog
* */
@Override
protected void onPreExecute() {
super.onPreExecute();
pDialog = new ProgressDialog(MainActivity.this);
pDialog.setMessage(Html.fromHtml("<b>Search</b><br/>Loading Places..."));
pDialog.setIndeterminate(false);
pDialog.setCancelable(false);
pDialog.show();
}
/**
* getting Places JSON
* */
protected String doInBackground(String... args) {
// creating Places class object
googlePlaces = new GooglePlaces();
try {
// Separeate your place types by PIPE symbol "|"
// If you want all types places make it as null
// Check list of types supported by google
//
String types = "cafe|restaurant"; // Listing places only cafes, restaurants
// Radius in meters - increase this value if you don't find any places
double radius = 1000; // 1000 meters
// get nearest places
nearPlaces = googlePlaces.search(gps.getLatitude(),
gps.getLongitude(), radius, types);
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
protected void onPostExecute(String file_url) {
// dismiss the dialog after getting all products
if(pDialog != null)
pDialog.dismiss();
// updating UI from Background Thread
runOnUiThread(new Runnable() {
public void run() {
/**
* Updating parsed Places into LISTVIEW
* */
// Get json response status
String status = nearPlaces.status;
// Check for all possible status
if(status.equals("OK")){
// Successfully got places details
if (nearPlaces.results != null) {
// loop through each place
for (Place p : nearPlaces.results) {
HashMap<String, String> map = new HashMap<String, String>();
// Place reference won't display in listview - it will be hidden
// Place reference is used to get "place full details"
map.put(KEY_REFERENCE, p.reference);
// Place name
map.put(KEY_NAME, p.name);
// adding HashMap to ArrayList
placesListItems.add(map);
}
// list adapter
ListAdapter adapter = new SimpleAdapter(MainActivity.this, placesListItems,
R.layout.list_item,
new String[] { KEY_REFERENCE, KEY_NAME}, new int[] {
R.id.reference, R.id.name });
// Adding data into listview
lv.setAdapter(adapter);
}
}
else if(status.equals("ZERO_RESULTS")){
// Zero results found
alert.showAlertDialog(MainActivity.this, "Near Places",
"Sorry no places found. Try to change the types of places",
false);
}
else if(status.equals("UNKNOWN_ERROR"))
{
alert.showAlertDialog(MainActivity.this, "Places Error",
"Sorry unknown error occured.",
false);
}
else if(status.equals("OVER_QUERY_LIMIT"))
{
alert.showAlertDialog(MainActivity.this, "Places Error",
"Sorry query limit to google places is reached",
false);
}
else if(status.equals("REQUEST_DENIED"))
{
alert.showAlertDialog(MainActivity.this, "Places Error",
"Sorry error occured. Request is denied",
false);
}
else if(status.equals("INVALID_REQUEST"))
{
alert.showAlertDialog(MainActivity.this, "Places Error",
"Sorry error occured. Invalid Request",
false);
}
else
{
alert.showAlertDialog(MainActivity.this, "Places Error",
"Sorry error occured.",
false);
}
}
});
}
GooglePlaces 类的搜索方法是
public PlacesList search(double latitude, double longitude, double radius, String types)
throws Exception {
this._latitude = latitude;
this._longitude = longitude;
this._radius = radius;
try {
HttpRequestFactory httpRequestFactory = createRequestFactory(HTTP_TRANSPORT);
HttpRequest request = httpRequestFactory
.buildGetRequest(new GenericUrl(PLACES_SEARCH_URL));
request.getUrl().put("key", API_KEY);
request.getUrl().put("location", _latitude + "," + _longitude);
request.getUrl().put("radius", _radius); // in meters
request.getUrl().put("sensor", "false");
if(types != null)
request.getUrl().put("types", types);
PlacesList list = request.execute().parseAs(PlacesList.class);
// Check log cat for places response status
Log.d("Places Status", "" + list.status);
return list;
} catch (HttpResponseException e) {
Log.e("Error:", e.getMessage());
return null;
}
}
我已经使用了类似的权限
但我在 logcat 中遇到错误是
08-14 22:29:59.867: E/AndroidRuntime(331): FATAL EXCEPTION: AsyncTask #1
08-14 22:29:59.867: E/AndroidRuntime(331): java.lang.RuntimeException: An error occured while executing doInBackground()
08-14 22:29:59.867: E/AndroidRuntime(331): at android.os.AsyncTask$3.done(AsyncTask.java:200)
08-14 22:29:59.867: E/AndroidRuntime(331): at java.util.concurrent.FutureTask$Sync.innerSetException(FutureTask.java:273)
08-14 22:29:59.867: E/AndroidRuntime(331): at java.util.concurrent.FutureTask.setException(FutureTask.java:124)
08-14 22:29:59.867: E/AndroidRuntime(331): at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:307)
08-14 22:29:59.867: E/AndroidRuntime(331): at java.util.concurrent.FutureTask.run(FutureTask.java:137)
08-14 22:29:59.867: E/AndroidRuntime(331): at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1068)
08-14 22:29:59.867: E/AndroidRuntime(331): at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:561)
08-14 22:29:59.867: E/AndroidRuntime(331): at java.lang.Thread.run(Thread.java:1096)
08-14 22:29:59.867: E/AndroidRuntime(331): Caused by: java.lang.NoClassDefFoundError: com.google.common.base.Preconditions
08-14 22:29:59.867: E/AndroidRuntime(331): at com.google.api.client.util.ClassInfo.<init>(ClassInfo.java:164)
08-14 22:29:59.867: E/AndroidRuntime(331): at com.google.api.client.util.ClassInfo.of(ClassInfo.java:92)
08-14 22:29:59.867: E/AndroidRuntime(331): at com.google.api.client.util.GenericData.<init>(GenericData.java:79)
08-14 22:29:59.867: E/AndroidRuntime(331): at com.google.api.client.util.GenericData.<init>(GenericData.java:61)
08-14 22:29:59.867: E/AndroidRuntime(331): at com.google.api.client.http.GenericUrl.<init>(GenericUrl.java:97)
08-14 22:29:59.867: E/AndroidRuntime(331): at com.eheuristic.android.googlemap.GooglePlaces.search(GooglePlaces.java:56)
08-14 22:29:59.867: E/AndroidRuntime(331): at com.eheuristic.android.googlemap.MainActivity$LoadPlaces.doInBackground(MainActivity.java:1 85)
08-14 22:29:59.867: E/AndroidRuntime(331): at com.eheuristic.android.googlemap.MainActivity$LoadPlaces.doInBackground(MainActivity.java:1)
08-14 22:29:59.867: E/AndroidRuntime(331): at android.os.AsyncTask$2.call(AsyncTask.java:185)
08-14 22:29:59.867: E/AndroidRuntime(331): at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:305)
08-14 22:29:59.867: E/AndroidRuntime(331): ... 4 more
08-14 22:29:59.967: W/IInputConnectionWrapper(331): showStatusIcon on inactive InputConnection
08-14 22:30:02.298: E/WindowManager(331): Activity com.eheuristic.android.googlemap.MainActivity has leaked window com.android.internal.policy.impl.PhoneWindow$DecorView@44f72ff0 that was originally added here
08-14 22:30:02.298: E/WindowManager(331): android.view.WindowLeaked: Activity com.eheuristic.android.googlemap.MainActivity has leaked window com.android.internal.policy.impl.PhoneWindow$DecorView@44f72ff0 that was originally added here
08-14 22:30:02.298: E/WindowManager(331): at android.view.ViewRoot.<init>(ViewRoot.java:247)
08-14 22:30:02.298: E/WindowManager(331): at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:148)
08-14 22:30:02.298: E/WindowManager(331): at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:91)
08-14 22:30:02.298: E/WindowManager(331): at android.view.Window$LocalWindowManager.addView(Window.java:424)
08-14 22:30:02.298: E/WindowManager(331): at android.app.Dialog.show(Dialog.java:241)
08-14 22:30:02.298: E/WindowManager(331): at com.eheuristic.android.googlemap.MainActivity$LoadPlaces.onPreExecute(MainActivity.java:164)
08-14 22:30:02.298: E/WindowManager(331): at android.os.AsyncTask.execute(AsyncTask.java:391)
08-14 22:30:02.298: E/WindowManager(331): at com.eheuristic.android.googlemap.MainActivity.onCreate(MainActivity.java:104)
08-14 22:30:02.298: E/WindowManager(331): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
08-14 22:30:02.298: E/WindowManager(331): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2627)
08-14 22:30:02.298: E/WindowManager(331): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679)
08-14 22:30:02.298: E/WindowManager(331): at android.app.ActivityThread.access$2300(ActivityThread.java:125)
08-14 22:30:02.298: E/WindowManager(331): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033)
08-14 22:30:02.298: E/WindowManager(331): at android.os.Handler.dispatchMessage(Handler.java:99)
08-14 22:30:02.298: E/WindowManager(331): at android.os.Looper.loop(Looper.java:123)
08-14 22:30:02.298: E/WindowManager(331): at android.app.ActivityThread.main(ActivityThread.java:4627)
08-14 22:30:02.298: E/WindowManager(331): at java.lang.reflect.Method.invokeNative(Native Method)
08-14 22:30:02.298: E/WindowManager(331): at java.lang.reflect.Method.invoke(Method.java:521)
08-14 22:30:02.298: E/WindowManager(331): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
08-14 22:30:02.298: E/WindowManager(331): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
08-14 22:30:02.298: E/WindowManager(331): at dalvik.system.NativeStart.main(Native Method)
最佳答案
您正在泄漏对话框。您需要在异步任务的 onPostExecute() 方法中调用 pDialog.dismiss();。你也应该把...
if(pDialog != null)
pDialog.dismiss();
在主线程 Activity 的 onPause() 方法中。这将确保窗口不会泄漏，即使您的应用程序在执行某些后台执行时丢失了前台。你应该有这样的东西......
public class Login extends Activity implements View.OnClickListener{
ProgressDialog pd;
public void onCreate(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_INDETERMINATE_PROGRESS);
setContentView(R.layout.login);
pd = null;
}
@Override
public void onPause(){
super.onPause();
if(pd != null)
pd.dismiss();
}
public void onClick(View v){
new SendTask().execute("");
}
/*
No networking allowed on the main thread.
*/
private class SendTask extends AsyncTask<String,String,String>{
int result;
@Override
protected void onPreExecute(){
pd = ProgressDialog.show(Login.this,"","Retrieving Inbox...", true,false);
}
@Override
protected String doInBackground(String...strings){
//do networking here
result = account.prepare();
return null;
}
@Override
protected void onPostExecute(String unused){
//check result
pd.dismiss();
Intent intent = new Intent(Login.this,NextActivity.class);
finish();
startActivity(intent);
}
}
}
关于android - Activity 泄露了最初添加在这里的窗口 com.android.internal.policy.impl.PhoneWindow$DecorView@44f72ff0，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/11957409/