1 /* 2 * Copyright (C) 2019 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.car.developeroptions.slices; 18 19 import android.content.Context; 20 import android.net.Uri; 21 22 import androidx.annotation.VisibleForTesting; 23 import androidx.lifecycle.LiveData; 24 import androidx.lifecycle.Observer; 25 import androidx.preference.PreferenceScreen; 26 import androidx.slice.Slice; 27 import androidx.slice.widget.SliceLiveData; 28 import androidx.slice.widget.SliceView; 29 30 import com.android.car.developeroptions.core.BasePreferenceController; 31 import com.android.settingslib.core.lifecycle.LifecycleObserver; 32 import com.android.settingslib.core.lifecycle.events.OnStart; 33 import com.android.settingslib.core.lifecycle.events.OnStop; 34 35 /** 36 * Default {@link BasePreferenceController} for {@link SliceView}. It will take {@link Uri} for 37 * Slice and display what's inside this {@link Uri} 38 */ 39 public class SlicePreferenceController extends BasePreferenceController implements 40 LifecycleObserver, OnStart, OnStop, Observer<Slice> { 41 @VisibleForTesting 42 LiveData<Slice> mLiveData; 43 private SlicePreference mSlicePreference; 44 private Uri mUri; 45 SlicePreferenceController(Context context, String preferenceKey)46 public SlicePreferenceController(Context context, String preferenceKey) { 47 super(context, preferenceKey); 48 } 49 50 @Override displayPreference(PreferenceScreen screen)51 public void displayPreference(PreferenceScreen screen) { 52 super.displayPreference(screen); 53 mSlicePreference = screen.findPreference(getPreferenceKey()); 54 } 55 56 @Override getAvailabilityStatus()57 public int getAvailabilityStatus() { 58 return mUri != null ? AVAILABLE : UNSUPPORTED_ON_DEVICE; 59 } 60 setSliceUri(Uri uri)61 public void setSliceUri(Uri uri) { 62 mUri = uri; 63 mLiveData = SliceLiveData.fromUri(mContext, mUri); 64 65 //TODO(b/120803703): figure out why we need to remove observer first 66 mLiveData.removeObserver(this); 67 } 68 69 @Override onStart()70 public void onStart() { 71 if (mLiveData != null) { 72 mLiveData.observeForever(this); 73 } 74 } 75 76 @Override onStop()77 public void onStop() { 78 if (mLiveData != null) { 79 mLiveData.removeObserver(this); 80 } 81 } 82 83 @Override onChanged(Slice slice)84 public void onChanged(Slice slice) { 85 if (slice != null) { 86 mSlicePreference.onSliceUpdated(slice); 87 } 88 } 89 } 90