Fix all Lint errors and warnings

Author: friederbluemle

app/build.gradle

@@ -16,6 +16,9 @@ android {
             proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
         }
     }
+    lintOptions {
+        warningsAsErrors true
+    }
 }
 
 dependencies {

app/lint.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<lint>
+    <issue id="GoogleAppIndexingWarning" severity="ignore"/>
+    <issue id="GradleDependency" severity="informational"/>
+    <issue id="OldTargetApi" severity="informational"/>
+</lint>

app/src/main/AndroidManifest.xml

@@ -6,7 +6,8 @@
     <uses-permission android:name="android.permission.INTERNET" />
 
     <application
-        android:allowBackup="true"
+        android:allowBackup="false"
+        android:fullBackupContent="false"
         android:icon="@drawable/ic_launcher"
         android:label="@string/app_name"
         android:theme="@style/AppTheme"

app/src/main/java/name/cpr/ExampleActivity.java

@@ -50,23 +50,15 @@ public void toggledFullscreen(boolean fullscreen)
                     attrs.flags |= WindowManager.LayoutParams.FLAG_FULLSCREEN;
                     attrs.flags |= WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON;
                     getWindow().setAttributes(attrs);
-                    if (android.os.Build.VERSION.SDK_INT >= 14)
-                    {
-                        //noinspection all
-                        getWindow().getDecorView().setSystemUiVisibility(View.SYSTEM_UI_FLAG_LOW_PROFILE);
-                    }
+                    getWindow().getDecorView().setSystemUiVisibility(View.SYSTEM_UI_FLAG_LOW_PROFILE);
                 }
                 else
                 {
                     WindowManager.LayoutParams attrs = getWindow().getAttributes();
                     attrs.flags &= ~WindowManager.LayoutParams.FLAG_FULLSCREEN;
                     attrs.flags &= ~WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON;
                     getWindow().setAttributes(attrs);
-                    if (android.os.Build.VERSION.SDK_INT >= 14)
-                    {
-                        //noinspection all
-                        getWindow().getDecorView().setSystemUiVisibility(View.SYSTEM_UI_FLAG_VISIBLE);
-                    }
+                    getWindow().getDecorView().setSystemUiVisibility(View.SYSTEM_UI_FLAG_VISIBLE);
                 }
 
             }

app/src/main/res/layout/view_loading_video.xml

@@ -1,31 +1,24 @@
-<RelativeLayout
+<LinearLayout
     xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
-    android:background="#000000" >
+    android:orientation="vertical"
+    android:layout_centerInParent="true" >
 
-    <LinearLayout
+    <ProgressBar
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
-        android:orientation="vertical"
-        android:layout_centerInParent="true" >
+        android:layout_gravity="center"
+        android:indeterminate="true"
+        style="?android:attr/progressBarStyleLarge" />
 
-        <ProgressBar
-            android:layout_width="wrap_content"
-            android:layout_height="wrap_content"
-            android:layout_gravity="center"
-            android:indeterminate="true"
-            style="?android:attr/progressBarStyleLarge" />
-
-        <TextView
-            android:layout_width="wrap_content"
-            android:layout_height="wrap_content"
-            android:layout_marginTop="8dp"
-            android:layout_marginBottom="24dp"
-            android:textAppearance="?android:attr/textAppearanceMedium"
-            android:textColor="#a3a3a3"
-            android:text="@string/loading_video" />
-
-    </LinearLayout>
+    <TextView
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginTop="8dp"
+        android:layout_marginBottom="24dp"
+        android:textAppearance="?android:attr/textAppearanceMedium"
+        android:textColor="#a3a3a3"
+        android:text="@string/loading_video" />
 
-</RelativeLayout>
+</LinearLayout>