1 /* 2 * Copyright (C) 2015 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.systemui.volume; 18 19 import android.content.Context; 20 import android.content.res.Resources; 21 import android.util.ArrayMap; 22 import android.util.TypedValue; 23 import android.view.View; 24 import android.view.View.OnAttachStateChangeListener; 25 import android.widget.TextView; 26 27 /** 28 * Class for updating textviews on configuration change. 29 */ 30 public class ConfigurableTexts { 31 32 private final Context mContext; 33 private final ArrayMap<TextView, Integer> mTexts = new ArrayMap<>(); 34 private final ArrayMap<TextView, Integer> mTextLabels = new ArrayMap<>(); 35 ConfigurableTexts(Context context)36 public ConfigurableTexts(Context context) { 37 mContext = context; 38 } 39 add(final TextView text)40 public int add(final TextView text) { 41 return add(text, -1); 42 } 43 add(final TextView text, final int labelResId)44 public int add(final TextView text, final int labelResId) { 45 if (text == null) return 0; 46 final Resources res = mContext.getResources(); 47 final float fontScale = res.getConfiguration().fontScale; 48 final float density = res.getDisplayMetrics().density; 49 final float px = text.getTextSize(); 50 final int sp = (int)(px / fontScale / density); 51 mTexts.put(text, sp); 52 text.addOnAttachStateChangeListener(new OnAttachStateChangeListener() { 53 @Override 54 public void onViewDetachedFromWindow(View v) { 55 } 56 57 @Override 58 public void onViewAttachedToWindow(View v) { 59 setTextSizeH(text, sp); 60 } 61 }); 62 mTextLabels.put(text, labelResId); 63 return sp; 64 } 65 update()66 public void update() { 67 if (mTexts.isEmpty()) return; 68 mTexts.keyAt(0).post(mUpdateAll); 69 } 70 setTextSizeH(TextView text, int sp)71 private void setTextSizeH(TextView text, int sp) { 72 text.setTextSize(TypedValue.COMPLEX_UNIT_SP, sp); 73 } 74 setTextLabelH(TextView text, int labelResId)75 private void setTextLabelH(TextView text, int labelResId) { 76 try { 77 if (labelResId >= 0) { 78 Util.setText(text, mContext.getString(labelResId)); 79 } 80 } catch (Resources.NotFoundException e) { 81 // oh well. 82 } 83 } 84 85 private final Runnable mUpdateAll = new Runnable() { 86 @Override 87 public void run() { 88 for (int i = 0; i < mTexts.size(); i++) { 89 setTextSizeH(mTexts.keyAt(i), mTexts.valueAt(i)); 90 } 91 for (int i = 0; i < mTextLabels.size(); i++) { 92 setTextLabelH(mTextLabels.keyAt(i), mTextLabels.valueAt(i)); 93 } 94 } 95 }; 96 } 97