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.BidiFormatter; 20 import android.text.InputType; 21 import android.util.AttributeSet; 22 import android.util.DisplayMetrics; 23 import android.util.Slog; 24 import android.view.Display; 25 import android.view.View; 26 import android.widget.EditText; 27 28 import com.android.settings.R; 29 import com.android.settings.Utils; 30 import com.android.settingslib.CustomEditTextPreferenceCompat; 31 import com.android.settingslib.display.DisplayDensityUtils; 32 33 import java.text.NumberFormat; 34 35 public class DensityPreference extends CustomEditTextPreferenceCompat { 36 private static final String TAG = "DensityPreference"; 37 DensityPreference(Context context, AttributeSet attrs)38 public DensityPreference(Context context, AttributeSet attrs) { 39 super(context, attrs); 40 } 41 42 @Override onAttached()43 public void onAttached() { 44 super.onAttached(); 45 final CharSequence dpValue = BidiFormatter.getInstance() 46 .unicodeWrap(NumberFormat.getInstance().format(getCurrentSwDp())); 47 setSummary(getContext().getString(R.string.density_pixel_summary,dpValue)); 48 } 49 getCurrentSwDp()50 private int getCurrentSwDp() { 51 final Resources res = getContext().getResources(); 52 final DisplayMetrics metrics = res.getDisplayMetrics(); 53 final float density = metrics.density; 54 final int minDimensionPx = Math.min(metrics.widthPixels, metrics.heightPixels); 55 return (int) (minDimensionPx / density); 56 } 57 58 @Override onBindDialogView(View view)59 protected void onBindDialogView(View view) { 60 super.onBindDialogView(view); 61 62 final EditText editText = (EditText) view.findViewById(android.R.id.edit); 63 64 if (editText != null) { 65 editText.setInputType(InputType.TYPE_CLASS_NUMBER); 66 editText.setText(getCurrentSwDp() + ""); 67 Utils.setEditTextCursorPosition(editText); 68 } 69 } 70 71 @Override onDialogClosed(boolean positiveResult)72 protected void onDialogClosed(boolean positiveResult) { 73 if (positiveResult) { 74 try { 75 final Resources res = getContext().getResources(); 76 final DisplayMetrics metrics = res.getDisplayMetrics(); 77 final int newSwDp = Math.max(Integer.parseInt(getText()), 320); 78 final int minDimensionPx = Math.min(metrics.widthPixels, metrics.heightPixels); 79 final int newDensity = DisplayMetrics.DENSITY_MEDIUM * minDimensionPx / newSwDp; 80 final int densityDpi = Math.max(newDensity, 120); 81 DisplayDensityUtils.setForcedDisplayDensity(Display.DEFAULT_DISPLAY, densityDpi); 82 } catch (Exception e) { 83 // TODO: display a message instead of silently failing. 84 Slog.e(TAG, "Couldn't save density", e); 85 } 86 } 87 } 88 } 89