1 /* 2 * Copyright (C) 2014 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package androidx.appcompat.widget; 18 19 import static androidx.annotation.RestrictTo.Scope.LIBRARY_GROUP; 20 21 import android.graphics.Rect; 22 import android.os.Build; 23 import android.util.Log; 24 import android.view.View; 25 26 import androidx.annotation.RestrictTo; 27 import androidx.core.view.ViewCompat; 28 29 import java.lang.reflect.InvocationTargetException; 30 import java.lang.reflect.Method; 31 32 /** 33 * @hide 34 */ 35 @RestrictTo(LIBRARY_GROUP) 36 public class ViewUtils { 37 private static final String TAG = "ViewUtils"; 38 39 private static Method sComputeFitSystemWindowsMethod; 40 41 static { 42 if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR2) { 43 try { 44 sComputeFitSystemWindowsMethod = View.class.getDeclaredMethod( 45 "computeFitSystemWindows", Rect.class, Rect.class); 46 if (!sComputeFitSystemWindowsMethod.isAccessible()) { 47 sComputeFitSystemWindowsMethod.setAccessible(true); 48 } 49 } catch (NoSuchMethodException e) { 50 Log.d(TAG, "Could not find method computeFitSystemWindows. Oh well."); 51 } 52 } 53 } 54 ViewUtils()55 private ViewUtils() {} 56 isLayoutRtl(View view)57 public static boolean isLayoutRtl(View view) { 58 return ViewCompat.getLayoutDirection(view) == ViewCompat.LAYOUT_DIRECTION_RTL; 59 } 60 61 /** 62 * Allow calling the hidden method {@code computeFitSystemWindows(Rect, Rect)} through 63 * reflection on {@code view}. 64 */ computeFitSystemWindows(View view, Rect inoutInsets, Rect outLocalInsets)65 public static void computeFitSystemWindows(View view, Rect inoutInsets, Rect outLocalInsets) { 66 if (sComputeFitSystemWindowsMethod != null) { 67 try { 68 sComputeFitSystemWindowsMethod.invoke(view, inoutInsets, outLocalInsets); 69 } catch (Exception e) { 70 Log.d(TAG, "Could not invoke computeFitSystemWindows", e); 71 } 72 } 73 } 74 75 /** 76 * Allow calling the hidden method {@code makeOptionalFitsSystem()} through reflection on 77 * {@code view}. 78 */ makeOptionalFitsSystemWindows(View view)79 public static void makeOptionalFitsSystemWindows(View view) { 80 if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN) { 81 try { 82 // We need to use getMethod() for makeOptionalFitsSystemWindows since both View 83 // and ViewGroup implement the method 84 Method method = view.getClass().getMethod("makeOptionalFitsSystemWindows"); 85 if (!method.isAccessible()) { 86 method.setAccessible(true); 87 } 88 method.invoke(view); 89 } catch (NoSuchMethodException e) { 90 Log.d(TAG, "Could not find method makeOptionalFitsSystemWindows. Oh well..."); 91 } catch (InvocationTargetException e) { 92 Log.d(TAG, "Could not invoke makeOptionalFitsSystemWindows", e); 93 } catch (IllegalAccessException e) { 94 Log.d(TAG, "Could not invoke makeOptionalFitsSystemWindows", e); 95 } 96 } 97 } 98 } 99