我使用ACRA报告应用程序崩溃。我得到了一个视图没有附加到窗口管理器错误消息,并认为我已经通过包装pDialog.dismiss()修复了它;在if语句中:

if (pDialog!=null) 
{
    if (pDialog.isShowing()) 
    {
        pDialog.dismiss();   
    }
}

它减少了我收到的未附加到窗口管理器崩溃的视图数量,但我仍然得到一些,我不确定如何解决它。

错误信息:

java.lang.IllegalArgumentException: View not attached to window manager
at android.view.WindowManagerGlobal.findViewLocked(WindowManagerGlobal.java:425)
at android.view.WindowManagerGlobal.removeView(WindowManagerGlobal.java:327)
at android.view.WindowManagerImpl.removeView(WindowManagerImpl.java:83)
at android.app.Dialog.dismissDialog(Dialog.java:330)
at android.app.Dialog.dismiss(Dialog.java:312)
at com.package.class$LoadAllProducts.onPostExecute(class.java:624)
at com.package.class$LoadAllProducts.onPostExecute(class.java:1)
at android.os.AsyncTask.finish(AsyncTask.java:631)
at android.os.AsyncTask.access$600(AsyncTask.java:177)
at android.os.AsyncTask$InternalHandler.handleMessage(AsyncTask.java:644)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:176)
at android.app.ActivityThread.main(ActivityThread.java:5419)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:525)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1046)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:862)
at dalvik.system.NativeStart.main(Native Method)

代码片段:

class LoadAllProducts extends AsyncTask<String, String, String> 
{

    /**
     * Before starting background thread Show Progress Dialog
     * */
    @Override
    protected void onPreExecute() 
    {
        super.onPreExecute();
        pDialog = new ProgressDialog(CLASS.this);
        pDialog.setMessage("Loading. Please wait...");
        pDialog.setIndeterminate(false);
        pDialog.setCancelable(false);
        pDialog.show();
    }

    /**
     * getting All products from url
     * */
    protected String doInBackground(String... args) 
    {
        // Building Parameters
        doMoreStuff("internet");
        return null;
    }


    /**
     * After completing background task Dismiss the progress dialog
     * **/
    protected void onPostExecute(String file_url) 
    {
         // dismiss the dialog after getting all products
         if (pDialog!=null) 
         {
                if (pDialog.isShowing()) 
                {
                    pDialog.dismiss();   //This is line 624!    
                }
         }
         something(note);
    }
}

清单:

    <activity
        android:name="pagename.CLASS" 
        android:configChanges="keyboard|keyboardHidden|orientation|screenSize|screenLayout"            
        android:label="@string/name" >
    </activity>

为了阻止撞车,我错过了什么?


当前回答

可能你全局初始化pDialog,然后删除它并在本地初始化你的视图或对话框。我有同样的问题,我已经这样做了,我的问题已经解决了。希望这对你有用。

其他回答

首先,崩溃的原因是decorView的索引是-1,我们可以从Android源代码中知道,有代码片段:

类:android.view.WindowManagerGlobal 文件:WindowManagerGlobal.java

private int findViewLocked(View view, boolean required) {
        final int index = mViews.indexOf(view);
//here, view is decorView,comment by OF
        if (required && index < 0) {
            throw new IllegalArgumentException("View=" + view + " not attached to window manager");
        }
        return index;
    }

所以我们得到了跟随分辨率,只是判断decorView的索引,如果它大于0,那么继续,或者只是返回并放弃解散,代码如下:

try {
            Class<?> windowMgrGloable = Class.forName("android.view.WindowManagerGlobal");
            try {
                Method mtdGetIntance = windowMgrGloable.getDeclaredMethod("getInstance");
                mtdGetIntance.setAccessible(true);
                try {
                    Object windownGlobal = mtdGetIntance.invoke(null,null);
                    try {
                        Field mViewField = windowMgrGloable.getDeclaredField("mViews");
                        mViewField.setAccessible(true);
                        ArrayList<View> mViews = (ArrayList<View>) mViewField.get(windownGlobal);
                        int decorViewIndex = mViews.indexOf(pd.getWindow().getDecorView());
                        Log.i(TAG,"check index:"+decorViewIndex);
                        if (decorViewIndex < 0) {
                            return;
                        }
                    } catch (NoSuchFieldException e) {
                        e.printStackTrace();
                    }
                } catch (IllegalAccessException e) {
                    e.printStackTrace();
                } catch (InvocationTargetException e) {
                    e.printStackTrace();
                }
            } catch (NoSuchMethodException e) {
                e.printStackTrace();
            }
        } catch (ClassNotFoundException e) {
            e.printStackTrace();
        }
        if (pd.isShowing()) {
            pd.dismiss();
        }

重写onConfigurationChanged并取消进度对话框。 如果进度对话框在纵向中创建,并在横向中解散,那么它将抛出未附加到窗口管理器的视图错误。

同时在onPause(), onBackPressed和onDestroy方法中停止进度条和异步任务。

if(asyncTaskObj !=null && asyncTaskObj.getStatus().equals(AsyncTask.Status.RUNNING)){

    asyncTaskObj.cancel(true);

}

基于@erakitin的答案,但也兼容Android版本< API级别17。不幸的是,Activity.isDestroyed()只支持API级别17以后,所以如果你的目标是一个更老的API级别,就像我一样,你必须自己检查它。还没有得到视图没有附加到窗口管理器异常之后。

示例代码

public class MainActivity extends Activity {
    private TestAsyncTask mAsyncTask;
    private ProgressDialog mProgressDialog;
    private boolean mIsDestroyed;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        if (condition) {
            mAsyncTask = new TestAsyncTask();
            mAsyncTask.execute();
        }
    }

    @Override
    protected void onResume() {
        super.onResume();

        if (mAsyncTask != null && mAsyncTask.getStatus() != AsyncTask.Status.FINISHED) {
            Toast.makeText(this, "Still loading", Toast.LENGTH_LONG).show();
            return;
        }
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        mIsDestroyed = true;

        if (mProgressDialog != null && mProgressDialog.isShowing()) {
            mProgressDialog.dismiss();
        }
    }

    public class TestAsyncTask extends AsyncTask<Void, Void, AsyncResult> {    
        @Override
        protected void onPreExecute() {
            super.onPreExecute();
            mProgressDialog = ProgressDialog.show(MainActivity.this, "Please wait", "doing stuff..");
        }

        @Override
        protected AsyncResult doInBackground(Void... arg0) {
            // Do long running background stuff
            return null;
        }

        @Override
        protected void onPostExecute(AsyncResult result) {
            // Use MainActivity.this.isDestroyed() when targeting API level 17 or higher
            if (mIsDestroyed)// Activity not there anymore
                return;

            mProgressDialog.dismiss();
            // Handle rest onPostExecute
        }
    }
}

如何重现错误:

在您的设备上启用此选项:设置->开发人员选项->不要保留活动。 当AsyncTask正在执行并且ProgressDialog正在显示时,按Home键。

Android操作系统会在活动被隐藏时立即销毁它。当onPostExecute被调用时,Activity将处于“完成”状态,并且ProgressDialog不会附加到Activity。

如何解决:

在onPostExecute方法中检查活动状态。 取消onDestroy方法中的ProgressDialog。否则,将抛出android.view. windowleaks异常。此异常通常来自活动结束时仍处于活动状态的对话框。

试试这个固定的代码:

public class YourActivity extends Activity {

    private void showProgressDialog() {
        if (pDialog == null) {
            pDialog = new ProgressDialog(StartActivity.this);
            pDialog.setMessage("Loading. Please wait...");
            pDialog.setIndeterminate(false);
            pDialog.setCancelable(false);
        }
        pDialog.show();
    }

    private void dismissProgressDialog() {
        if (pDialog != null && pDialog.isShowing()) {
            pDialog.dismiss();
        }
    }

    @Override
    protected void onDestroy() {
        dismissProgressDialog();
        super.onDestroy();
    }

    class LoadAllProducts extends AsyncTask<String, String, String> {

        // Before starting background thread Show Progress Dialog
        @Override
        protected void onPreExecute() {
            showProgressDialog();
        }

        //getting All products from url
        protected String doInBackground(String... args) {
            doMoreStuff("internet");
            return null;
        }

        // After completing background task Dismiss the progress dialog
        protected void onPostExecute(String file_url) {
            if (YourActivity.this.isDestroyed()) { // or call isFinishing() if min sdk version < 17
                return;
            }
            dismissProgressDialog();
            something(note);
        }
    }
}

我使用这个简单的扩展函数来检查活动是否被销毁。

    protected fun Activity?.isNoMore(): Boolean {
        return this?.let {
            isFinishing || isDestroyed
        } ?: true
    }

在下面提到的活动中使用它。

if (!isNoMore()) {
//show your dialog. Also, make the null check for dialog object.
}