1 /* 2 * Copyright (C) 2008 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.settings; 18 19 import android.content.Context; 20 import android.support.v7.preference.Preference; 21 import android.support.v7.preference.PreferenceViewHolder; 22 import android.util.AttributeSet; 23 import android.view.View; 24 25 /** 26 * A category with a progress spinner 27 */ 28 public class ProgressCategory extends ProgressCategoryBase { 29 30 private int mEmptyTextRes; 31 private boolean mProgress = false; 32 private Preference mNoDeviceFoundPreference; 33 private boolean mNoDeviceFoundAdded; 34 ProgressCategory(Context context)35 public ProgressCategory(Context context) { 36 this(context, null); 37 } 38 ProgressCategory(Context context, AttributeSet attrs)39 public ProgressCategory(Context context, AttributeSet attrs) { 40 super(context, attrs, 0); 41 } 42 ProgressCategory(Context context, AttributeSet attrs, int defStyleAttr)43 public ProgressCategory(Context context, AttributeSet attrs, 44 int defStyleAttr) { 45 this(context, attrs, defStyleAttr, 0); 46 } 47 ProgressCategory(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes)48 public ProgressCategory(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) { 49 super(context, attrs, defStyleAttr, defStyleRes); 50 setLayoutResource(R.layout.preference_progress_category); 51 } 52 setEmptyTextRes(int emptyTextRes)53 public void setEmptyTextRes(int emptyTextRes) { 54 mEmptyTextRes = emptyTextRes; 55 } 56 57 @Override onBindViewHolder(PreferenceViewHolder view)58 public void onBindViewHolder(PreferenceViewHolder view) { 59 super.onBindViewHolder(view); 60 final View progressBar = view.findViewById(R.id.scanning_progress); 61 62 boolean noDeviceFound = (getPreferenceCount() == 0 || 63 (getPreferenceCount() == 1 && getPreference(0) == mNoDeviceFoundPreference)); 64 progressBar.setVisibility(mProgress ? View.VISIBLE : View.GONE); 65 66 if (mProgress || !noDeviceFound) { 67 if (mNoDeviceFoundAdded) { 68 removePreference(mNoDeviceFoundPreference); 69 mNoDeviceFoundAdded = false; 70 } 71 } else { 72 if (!mNoDeviceFoundAdded) { 73 if (mNoDeviceFoundPreference == null) { 74 mNoDeviceFoundPreference = new Preference(getPreferenceManager().getContext()); 75 mNoDeviceFoundPreference.setLayoutResource(R.layout.preference_empty_list); 76 mNoDeviceFoundPreference.setTitle(mEmptyTextRes); 77 mNoDeviceFoundPreference.setSelectable(false); 78 } 79 addPreference(mNoDeviceFoundPreference); 80 mNoDeviceFoundAdded = true; 81 } 82 } 83 } 84 85 @Override setProgress(boolean progressOn)86 public void setProgress(boolean progressOn) { 87 mProgress = progressOn; 88 notifyChanged(); 89 } 90 } 91