Updater: remove dialog before showing a new one and when detaching

2020-04-03 16:18:18.286 28742-28742/org.lineageos.updater E/WindowManager: android.view.WindowLeaked: Activity org.lineageos.updater.UpdatesActivity has leaked window DecorView@5dd12b3[UpdatesActivity] that was originally added here
        at android.view.ViewRootImpl.<init>(ViewRootImpl.java:621)
        at android.view.WindowManagerGlobal.addView(WindowManagerGlobal.java:377)
        at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:96)
        at android.app.Dialog.show(Dialog.java:342)
        at androidx.appcompat.app.AlertDialog$Builder.show(AlertDialog.java:1009)
        at org.lineageos.updater.UpdatesListAdapter.showInfoDialog(UpdatesListAdapter.java:552)
        at org.lineageos.updater.UpdatesListAdapter.lambda$setButtonAction$5$UpdatesListAdapter(UpdatesListAdapter.java:375)
        at org.lineageos.updater.-$$Lambda$UpdatesListAdapter$xtQzmsol8pO3BlYZkbKcb5gVAq4.onClick(Unknown Source:2)
        at org.lineageos.updater.UpdatesListAdapter.lambda$setButtonAction$9(UpdatesListAdapter.java:408)
        at org.lineageos.updater.-$$Lambda$UpdatesListAdapter$M4hRQyNgJseuHrw6EfkhK_yrGK8.onClick(Unknown Source:2)
        at android.view.View.performClick(View.java:7259)
        at android.view.View.performClickInternal(View.java:7236)
        at android.view.View.access$3600(View.java:801)
        at android.view.View$PerformClick.run(View.java:27896)
        at android.os.Handler.handleCallback(Handler.java:883)
        at android.os.Handler.dispatchMessage(Handler.java:100)
        at android.os.Looper.loop(Looper.java:214)
        at android.app.ActivityThread.main(ActivityThread.java:7397)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:491)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:935)

Change-Id: I7877b02b8526c7c12331a660a7ac934d02656e6f
Signed-off-by: Alexander Martinz <amartinz@shiftphones.com>

src/org/lineageos/updater/UpdatesListAdapter.java

@@ -78,6 +78,8 @@ public class UpdatesListAdapter extends RecyclerView.Adapter<UpdatesListAdapter.
     private UpdaterController mUpdaterController;
     private UpdatesListActivity mActivity;
 
+    private AlertDialog infoDialog;
+
     private enum Action {
         DOWNLOAD,
         PAUSE,
@@ -127,6 +129,15 @@ public class UpdatesListAdapter extends RecyclerView.Adapter<UpdatesListAdapter.
         return new ViewHolder(view);
     }
 
+    @Override
+    public void onViewDetachedFromWindow(ViewHolder holder) {
+        super.onViewDetachedFromWindow(holder);
+
+        if (infoDialog != null) {
+            infoDialog.dismiss();
+        }
+    }
+
     public void setUpdaterController(UpdaterController updaterController) {
         mUpdaterController = updaterController;
         notifyDataSetChanged();
@@ -545,12 +556,15 @@ public class UpdatesListAdapter extends RecyclerView.Adapter<UpdatesListAdapter.
                 Utils.getUpgradeBlockedURL(mActivity));
         SpannableString message = new SpannableString(messageString);
         Linkify.addLinks(message, Linkify.WEB_URLS);
-        AlertDialog dialog = new AlertDialog.Builder(mActivity)
+        if (infoDialog != null) {
+            infoDialog.dismiss();
+        }
+        infoDialog = new AlertDialog.Builder(mActivity)
                 .setTitle(R.string.blocked_update_dialog_title)
                 .setPositiveButton(android.R.string.ok, null)
                 .setMessage(message)
                 .show();
-        TextView textView = (TextView) dialog.findViewById(android.R.id.message);
+        TextView textView = (TextView) infoDialog.findViewById(android.R.id.message);
         textView.setMovementMethod(LinkMovementMethod.getInstance());
     }