Jason Monk | beda2dd | 2016-08-18 10:41:17 -0400 | [diff] [blame^] | 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 | package com.android.systemui; |
| 15 | |
| 16 | import android.annotation.Nullable; |
| 17 | import android.content.Context; |
| 18 | import android.content.res.TypedArray; |
| 19 | import android.util.AttributeSet; |
| 20 | import android.util.Log; |
| 21 | import android.view.View; |
| 22 | |
| 23 | import com.android.systemui.plugins.PluginListener; |
| 24 | import com.android.systemui.plugins.PluginManager; |
| 25 | import com.android.systemui.plugins.ViewProvider; |
| 26 | |
| 27 | /** |
| 28 | * Define an interface or abstract class as follows that includes the |
| 29 | * version and action. |
| 30 | * |
| 31 | * public interface MyInterface { |
| 32 | * public static final String ACTION = |
| 33 | * "com.android.systemui.action.PLUGIN_MYINTERFACE"; |
| 34 | * |
| 35 | * public static final int VERSION = 1; |
| 36 | * |
| 37 | * void myImportantInterface(); |
| 38 | * } |
| 39 | * |
| 40 | * Then put in a PluginInflateContainer to use and specify the interface |
| 41 | * or class that will be implemented as viewType. The layout specified |
| 42 | * will be used by default and whenever a plugin is not present. |
| 43 | * |
| 44 | * <com.android.systemui.PluginInflateContainer |
| 45 | * android:id="@+id/some_id" |
| 46 | * android:layout_width="match_parent" |
| 47 | * android:layout_height="match_parent" |
| 48 | * android:layout="@layout/my_default_component" |
| 49 | * systemui:viewType="com.android.systemui.plugins.MyInterface" /> |
| 50 | */ |
| 51 | public class PluginInflateContainer extends AutoReinflateContainer |
| 52 | implements PluginListener<ViewProvider> { |
| 53 | |
| 54 | private static final String TAG = "PluginInflateContainer"; |
| 55 | |
| 56 | private String mAction; |
| 57 | private int mVersion; |
| 58 | private View mPluginView; |
| 59 | |
| 60 | public PluginInflateContainer(Context context, @Nullable AttributeSet attrs) { |
| 61 | super(context, attrs); |
| 62 | TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.PluginInflateContainer); |
| 63 | String viewType = a.getString(R.styleable.PluginInflateContainer_viewType); |
| 64 | try { |
| 65 | Class c = Class.forName(viewType); |
| 66 | mAction = (String) c.getDeclaredField("ACTION").get(null); |
| 67 | mVersion = (int) c.getDeclaredField("VERSION").get(null); |
| 68 | } catch (Exception e) { |
| 69 | Log.d(TAG, "Problem getting class info " + viewType, e); |
| 70 | mAction = null; |
| 71 | mVersion = 0; |
| 72 | } |
| 73 | } |
| 74 | |
| 75 | @Override |
| 76 | protected void onAttachedToWindow() { |
| 77 | super.onAttachedToWindow(); |
| 78 | if (mAction != null) { |
| 79 | PluginManager.getInstance(getContext()).addPluginListener(mAction, this, mVersion); |
| 80 | } |
| 81 | } |
| 82 | |
| 83 | @Override |
| 84 | protected void onDetachedFromWindow() { |
| 85 | super.onDetachedFromWindow(); |
| 86 | if (mAction != null) { |
| 87 | PluginManager.getInstance(getContext()).removePluginListener(this); |
| 88 | } |
| 89 | } |
| 90 | |
| 91 | @Override |
| 92 | protected void inflateLayoutImpl() { |
| 93 | if (mPluginView != null) { |
| 94 | addView(mPluginView); |
| 95 | } else { |
| 96 | super.inflateLayoutImpl(); |
| 97 | } |
| 98 | } |
| 99 | |
| 100 | @Override |
| 101 | public void onPluginConnected(ViewProvider plugin) { |
| 102 | mPluginView = plugin.getView(); |
| 103 | inflateLayout(); |
| 104 | } |
| 105 | |
| 106 | @Override |
| 107 | public void onPluginDisconnected(ViewProvider plugin) { |
| 108 | mPluginView = null; |
| 109 | inflateLayout(); |
| 110 | } |
| 111 | } |