android - Activity 泄露了最初添加在这里的窗口 com.android.internal.policy.impl.PhoneWindow$DecorView@44f72ff0

Question

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)

Answer 1

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);
        }
     }
}