Main: Fix virtual keyboard (IME) logic

When a user returns from the app details page, display IME only if it was not
closed when they left the page in first place. If the IME was closed, it was
likely that the user didn't intend to focus any more on the search view.
Therefore, in such a case, the focus is cleared from the search view.

Signed-off-by: Muntashir Al-Islam <muntashirakon@riseup.net>

Author: MuntashirAkon

app/src/main/java/io/github/muntashirakon/AppManager/main/MainActivity.java

@@ -23,8 +23,11 @@
 import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
 import androidx.appcompat.app.ActionBar;
+import androidx.appcompat.widget.SearchView;
 import androidx.collection.ArrayMap;
 import androidx.core.content.ContextCompat;
+import androidx.core.view.ViewCompat;
+import androidx.core.view.WindowInsetsCompat;
 import androidx.lifecycle.ViewModelProvider;
 import androidx.recyclerview.widget.LinearLayoutManager;
 import androidx.recyclerview.widget.RecyclerView;
@@ -212,11 +215,6 @@ protected void onAuthenticated(Bundle savedInstanceState) {
             actionBar.setCustomView(searchView, layoutParams);
             mSearchView = searchView;
             mSearchView.setIconifiedByDefault(false);
-            mSearchView.setOnFocusChangeListener((v, hasFocus) -> {
-                if (!hasFocus) {
-                    UiUtils.hideKeyboard(v);
-                }
-            });
             // Check for market://search/?q=<query>
             Uri marketUri = getIntent().getData();
             if (marketUri != null && "market".equals(marketUri.getScheme()) && "search".equals(marketUri.getHost())) {
@@ -524,6 +522,8 @@ protected void onStart() {
         }
     }
 
+    private boolean mImsVisibleBeforeLeave = false;
+
     @Override
     protected void onResume() {
         super.onResume();
@@ -532,12 +532,26 @@ protected void onResume() {
             mBatchOpsHandler.updateConstraints();
             mMultiSelectionView.updateCounter(false);
         }
+        if (mSearchView != null) {
+            mSearchView.post(() -> {
+                if (mImsVisibleBeforeLeave) {
+                    mSearchView.requestFocus();
+                    UiUtils.showKeyboard(mSearchView);
+                }
+            });
+        }
         ContextCompat.registerReceiver(this, mBatchOpsBroadCastReceiver,
                 new IntentFilter(BatchOpsService.ACTION_BATCH_OPS_COMPLETED), ContextCompat.RECEIVER_NOT_EXPORTED);
     }
 
     @Override
     protected void onPause() {
+        WindowInsetsCompat insets = ViewCompat.getRootWindowInsets(getWindow().getDecorView());
+        mImsVisibleBeforeLeave = insets != null && insets.isVisible(WindowInsetsCompat.Type.ime());
+        View focusedView = getCurrentFocus();
+        if (focusedView instanceof SearchView.SearchAutoComplete) {
+            focusedView.clearFocus();
+        }
         super.onPause();
         unregisterReceiver(mBatchOpsBroadCastReceiver);
     }