1 /* 2 * Copyright (C) 2013 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 com.android.inputmethod.compat; 18 19 import android.view.View; 20 21 import java.lang.reflect.Method; 22 23 public final class ViewCompatUtils { 24 // Note that View.LAYOUT_DIRECTION_LTR and View.LAYOUT_DIRECTION_RTL have been introduced in 25 // API level 17 (Build.VERSION_CODE.JELLY_BEAN_MR1). 26 public static final int LAYOUT_DIRECTION_LTR = (Integer)CompatUtils.getFieldValue(null, 0x0, 27 CompatUtils.getField(View.class, "LAYOUT_DIRECTION_LTR")); 28 public static final int LAYOUT_DIRECTION_RTL = (Integer)CompatUtils.getFieldValue(null, 0x1, 29 CompatUtils.getField(View.class, "LAYOUT_DIRECTION_RTL")); 30 31 // Note that View.getPaddingEnd(), View.setPaddingRelative(int,int,int,int), and 32 // View.getLayoutDirection() have been introduced in API level 17 33 // (Build.VERSION_CODE.JELLY_BEAN_MR1). 34 private static final Method METHOD_getPaddingEnd = CompatUtils.getMethod( 35 View.class, "getPaddingEnd"); 36 private static final Method METHOD_setPaddingRelative = CompatUtils.getMethod( 37 View.class, "setPaddingRelative", 38 Integer.TYPE, Integer.TYPE, Integer.TYPE, Integer.TYPE); 39 private static final Method METHOD_getLayoutDirection = CompatUtils.getMethod( 40 View.class, "getLayoutDirection"); 41 42 private ViewCompatUtils() { 43 // This utility class is not publicly instantiable. 44 } 45 46 public static int getPaddingEnd(final View view) { 47 if (METHOD_getPaddingEnd == null) { 48 return view.getPaddingRight(); 49 } 50 return (Integer)CompatUtils.invoke(view, 0, METHOD_getPaddingEnd); 51 } 52 53 public static void setPaddingRelative(final View view, final int start, final int top, 54 final int end, final int bottom) { 55 if (METHOD_setPaddingRelative == null) { 56 view.setPadding(start, top, end, bottom); 57 return; 58 } 59 CompatUtils.invoke(view, null, METHOD_setPaddingRelative, start, top, end, bottom); 60 } 61 62 public static int getLayoutDirection(final View view) { 63 if (METHOD_getLayoutDirection == null) { 64 return LAYOUT_DIRECTION_LTR; 65 } 66 return (Integer)CompatUtils.invoke(view, 0, METHOD_getLayoutDirection); 67 } 68 } 69
