Use transparent system bars on L

Change-Id: I1e8921fa0e8a5bdf34495f9d88ba9f3b1f1e9c89

2 files changed, 59 insertions, 0 deletions

diff --git a/src/com/android/launcher3/Launcher.java b/src/com/android/launcher3/Launcher.java
index 3636107c2..72cad5138 100644
--- a/src/com/android/launcher3/Launcher.java
+++ b/src/com/android/launcher3/Launcher.java
@@ -50,6 +50,7 @@ import android.content.res.Resources;
 import android.database.ContentObserver;
 import android.graphics.Bitmap;
 import android.graphics.Canvas;
+import android.graphics.Color;
 import android.graphics.Point;
 import android.graphics.PorterDuff;
 import android.graphics.Rect;
@@ -79,6 +80,7 @@ import android.view.Menu;
 import android.view.MotionEvent;
 import android.view.Surface;
 import android.view.View;
+import android.view.Window;
 import android.view.View.OnClickListener;
 import android.view.View.OnLongClickListener;
 import android.view.ViewGroup;
@@ -110,6 +112,9 @@ import java.io.FileNotFoundException;
 import java.io.FileOutputStream;
 import java.io.IOException;
 import java.io.PrintWriter;
+import java.lang.reflect.Field;
+import java.lang.reflect.InvocationTargetException;
+import java.lang.reflect.Method;
 import java.text.DateFormat;
 import java.util.ArrayList;
 import java.util.Collection;
@@ -1591,10 +1596,55 @@ public class Launcher extends Activity
         }
         registerReceiver(mReceiver, filter);
         FirstFrameAnimatorHelper.initializeDrawListener(getWindow().getDecorView());
+        setupTransparentSystemBarsForLmp();
         mAttached = true;
         mVisible = true;
     }
 
+    /**
+     * Sets up transparent navigation and status bars in LMP.
+     * This method is a no-op for other platform versions.
+     */
+    private void setupTransparentSystemBarsForLmp() {
+        // TODO(sansid): use the APIs directly when compiling against L sdk.
+        // Currently we use reflection to access the flags and the API to set the transparency
+        // on the System bars.
+        if (Utilities.isLmp()) {
+            try {
+                getWindow().getAttributes().systemUiVisibility |=
+                        (View.SYSTEM_UI_FLAG_LAYOUT_STABLE
+                                | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
+                                | View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION);
+                Field translucentStatusField =
+                        WindowManager.LayoutParams.class.getField("FLAG_TRANSLUCENT_STATUS");
+                Field translucentNavigationField =
+                        WindowManager.LayoutParams.class.getField("FLAG_TRANSLUCENT_NAVIGATION");
+                getWindow().clearFlags(translucentStatusField.getInt(null)
+                        | translucentNavigationField.getInt(null));
+                Field drawsSysBackgroundsField = WindowManager.LayoutParams.class.getField(
+                        "FLAG_DRAWS_SYSTEM_BAR_BACKGROUNDS");
+                getWindow().addFlags(drawsSysBackgroundsField.getInt(null));
+
+                Method setStatusBarColorMethod =
+                        Window.class.getDeclaredMethod("setStatusBarColor", int.class);
+                Method setNavigationBarColorMethod =
+                        Window.class.getDeclaredMethod("setNavigationBarColor", int.class);
+                setStatusBarColorMethod.invoke(getWindow(), Color.TRANSPARENT);
+                setNavigationBarColorMethod.invoke(getWindow(), Color.TRANSPARENT);
+            } catch (NoSuchFieldException e) {
+                Log.w(TAG, "NoSuchFieldException while setting up transparent bars");
+            } catch (NoSuchMethodException ex) {
+                Log.w(TAG, "NoSuchMethodException while setting up transparent bars");
+            } catch (IllegalAccessException e) {
+                Log.w(TAG, "IllegalAccessException while setting up transparent bars");
+            } catch (IllegalArgumentException e) {
+                Log.w(TAG, "IllegalArgumentException while setting up transparent bars");
+            } catch (InvocationTargetException e) {
+                Log.w(TAG, "InvocationTargetException while setting up transparent bars");
+            } finally {}
+        }
+    }
+
     @Override
     public void onDetachedFromWindow() {
         super.onDetachedFromWindow();
diff --git a/src/com/android/launcher3/Utilities.java b/src/com/android/launcher3/Utilities.java
index 8deadf1d9..74b6e47f1 100644
--- a/src/com/android/launcher3/Utilities.java
+++ b/src/com/android/launcher3/Utilities.java
@@ -33,6 +33,7 @@ import android.graphics.Rect;
 import android.graphics.drawable.BitmapDrawable;
 import android.graphics.drawable.Drawable;
 import android.graphics.drawable.PaintDrawable;
+import android.os.Build;
 import android.util.DisplayMetrics;
 import android.util.Log;
 import android.view.View;
@@ -99,6 +100,14 @@ public final class Utilities {
     }
 
     /**
+     * Indicates if the device is running LMP or not.
+     * TODO(sansid): Change the check to a VERSION_CODES code check once we have a version for L.
+     */
+    public static boolean isLmp() {
+        return "L".equals(Build.VERSION.CODENAME);
+    }
+
+    /**
      * Returns a bitmap suitable for the all apps view. Used to convert pre-ICS
      * icon bitmaps that are stored in the database (which were 74x74 pixels at hdpi size)
      * to the proper size (48dp)