Fixing potential null pointers

app/src/main/java/acr/browser/lightning/activity/BrowserActivity.java

@@ -765,18 +765,27 @@ public abstract class BrowserActivity extends ThemableBrowserActivity implements
                     return true;
                 case KeyEvent.KEYCODE_R:
                     // Refresh current tab
-                    mTabsManager.getCurrentTab().reload();
+                    LightningView currentTab = mTabsManager.getCurrentTab();
+                    if (currentTab != null) {
+                        currentTab.reload();
+                    }
                     return true;
                 case KeyEvent.KEYCODE_TAB:
                     int nextIndex = 0;
                     if (event.isShiftPressed()) {
                         // Go back one tab
-                        if(mTabsManager.indexOfCurrentTab() > 0) nextIndex = mTabsManager.indexOfCurrentTab() - 1;
-                        else nextIndex = mTabsManager.last();
+                        if (mTabsManager.indexOfCurrentTab() > 0) {
+                            nextIndex = mTabsManager.indexOfCurrentTab() - 1;
+                        } else {
+                            nextIndex = mTabsManager.last();
+                        }
                     } else {
                         // Go forward one tab
-                        if(mTabsManager.indexOfCurrentTab() < mTabsManager.last()) nextIndex = mTabsManager.indexOfCurrentTab() + 1;
-                        else nextIndex = 0;
+                        if (mTabsManager.indexOfCurrentTab() < mTabsManager.last()) {
+                            nextIndex = mTabsManager.indexOfCurrentTab() + 1;
+                        } else {
+                            nextIndex = 0;
+                        }
                     }
                     mPresenter.tabChanged(nextIndex);
                     return true;

app/src/main/java/acr/browser/lightning/dialog/LightningDialogBuilder.java

@@ -16,7 +16,6 @@ import android.widget.AutoCompleteTextView;
 import android.widget.EditText;
 
 import com.anthonycr.bonsai.CompletableOnSubscribe;
-import com.anthonycr.bonsai.CompletableSubscriber;
 import com.anthonycr.bonsai.Schedulers;
 import com.anthonycr.bonsai.SingleOnSubscribe;
 

app/src/main/java/acr/browser/lightning/favicon/ImageFetcher.java

@@ -8,12 +8,14 @@ import android.support.annotation.Nullable;
 import android.util.Log;
 
 import java.io.File;
+import java.io.IOException;
 import java.io.InputStream;
 
 import acr.browser.lightning.utils.Utils;
 import okhttp3.OkHttpClient;
 import okhttp3.Request;
 import okhttp3.Response;
+import okhttp3.ResponseBody;
 
 /**
  * An image fetcher that creates image
@@ -65,11 +67,17 @@ class ImageFetcher {
             Request imageRequest = new Request.Builder().url(url).build();
 
             Response boundsResponse = mHttpClient.newCall(imageRequest).execute();
-            boundsStream = boundsResponse.body().byteStream();
+            ResponseBody boundsBody = boundsResponse.body();
+
+            if (boundsBody == null) {
+                return null;
+            }
+
+            boundsStream = boundsBody.byteStream();
 
             BitmapFactory.decodeStream(boundsStream, null, mLoaderOptions);
 
-            boundsResponse.body().close();
+            boundsBody.close();
 
             int size = Utils.dpToPx(24);
 
@@ -77,12 +85,19 @@ class ImageFetcher {
             mLoaderOptions.inJustDecodeBounds = false;
 
             Response imageResponse = mHttpClient.newCall(imageRequest).execute();
-            iconStream = imageResponse.body().byteStream();
+
+            ResponseBody imageBody = imageResponse.body();
+
+            if (imageBody == null) {
+                return null;
+            }
+
+            iconStream = imageBody.byteStream();
 
             icon = BitmapFactory.decodeStream(iconStream, null, mLoaderOptions);
 
-            imageResponse.body().close();
-        } catch (Exception e) {
+            imageBody.close();
+        } catch (IOException exception) {
             Log.d(TAG, "Unable to download icon: " + url);
         } finally {
             Utils.close(boundsStream);

app/src/main/java/acr/browser/lightning/search/BaseSuggestionsModel.java

@@ -26,6 +26,7 @@ import okhttp3.Interceptor;
 import okhttp3.OkHttpClient;
 import okhttp3.Request;
 import okhttp3.Response;
+import okhttp3.ResponseBody;
 
 abstract class BaseSuggestionsModel {
 
@@ -112,9 +113,10 @@ abstract class BaseSuggestionsModel {
 
             Response suggestionsResponse = mHttpClient.newCall(suggestionsRequest).execute();
 
-            return suggestionsResponse.body().byteStream();
-        } catch (Exception e) {
-            Log.e(TAG, "Problem getting search suggestions", e);
+            ResponseBody responseBody = suggestionsResponse.body();
+            return responseBody != null ? responseBody.byteStream() : null;
+        } catch (IOException exception) {
+            Log.e(TAG, "Problem getting search suggestions", exception);
         }
 
         return null;