1 /* 2 * Copyright (C) 2016 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file 5 * except in compliance with the License. You may obtain a copy of the License at 6 * 7 * http://www.apache.org/licenses/LICENSE-2.0 8 * 9 * Unless required by applicable law or agreed to in writing, software distributed under the 10 * License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 11 * KIND, either express or implied. See the License for the specific language governing 12 * permissions and limitations under the License. 13 */ 14 15 package com.android.settings.display; 16 17 import android.content.Context; 18 import android.content.res.Resources; 19 import android.text.InputType; 20 import android.util.AttributeSet; 21 import android.util.DisplayMetrics; 22 import android.util.Slog; 23 import android.view.Display; 24 import android.view.View; 25 import android.widget.EditText; 26 import com.android.settings.CustomEditTextPreference; 27 import com.android.settings.R; 28 import com.android.settingslib.display.DisplayDensityUtils; 29 30 public class DensityPreference extends CustomEditTextPreference { 31 private static final String TAG = "DensityPreference"; 32 DensityPreference(Context context, AttributeSet attrs)33 public DensityPreference(Context context, AttributeSet attrs) { 34 super(context, attrs); 35 } 36 37 @Override onAttached()38 public void onAttached() { 39 super.onAttached(); 40 41 setSummary(getContext().getString(R.string.developer_density_summary, getCurrentSwDp())); 42 } 43 getCurrentSwDp()44 private int getCurrentSwDp() { 45 final Resources res = getContext().getResources(); 46 final DisplayMetrics metrics = res.getDisplayMetrics(); 47 final float density = metrics.density; 48 final int minDimensionPx = Math.min(metrics.widthPixels, metrics.heightPixels); 49 return (int) (minDimensionPx / density); 50 } 51 52 @Override onBindDialogView(View view)53 protected void onBindDialogView(View view) { 54 super.onBindDialogView(view); 55 56 final EditText editText = (EditText) view.findViewById(android.R.id.edit); 57 58 if (editText != null) { 59 editText.setInputType(InputType.TYPE_CLASS_NUMBER); 60 editText.setText(getCurrentSwDp() + ""); 61 } 62 } 63 64 @Override onDialogClosed(boolean positiveResult)65 protected void onDialogClosed(boolean positiveResult) { 66 if (positiveResult) { 67 try { 68 final Resources res = getContext().getResources(); 69 final DisplayMetrics metrics = res.getDisplayMetrics(); 70 final int newSwDp = Math.max(Integer.parseInt(getText()), 320); 71 final int minDimensionPx = Math.min(metrics.widthPixels, metrics.heightPixels); 72 final int newDensity = DisplayMetrics.DENSITY_MEDIUM * minDimensionPx / newSwDp; 73 final int densityDpi = Math.max(newDensity, 120); 74 DisplayDensityUtils.setForcedDisplayDensity(Display.DEFAULT_DISPLAY, densityDpi); 75 } catch (Exception e) { 76 // TODO: display a message instead of silently failing. 77 Slog.e(TAG, "Couldn't save density", e); 78 } 79 } 80 } 81 } 82