1 /* 2 * Copyright (C) 2016 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.documentsui; 18 19 import android.content.Context; 20 import android.util.AttributeSet; 21 import android.view.LayoutInflater; 22 import android.view.View; 23 import android.view.ViewGroup; 24 import android.widget.AdapterView; 25 import android.widget.BaseAdapter; 26 import android.widget.Spinner; 27 import android.widget.TextView; 28 29 import com.android.documentsui.NavigationViewManager.Breadcrumb; 30 import com.android.documentsui.NavigationViewManager.Environment; 31 import com.android.documentsui.base.DocumentInfo; 32 import com.android.documentsui.base.RootInfo; 33 import com.android.documentsui.base.State; 34 35 import java.util.function.IntConsumer; 36 37 /** 38 * Dropdown implementation of breadcrumb used for phone device layouts 39 */ 40 41 public final class DropdownBreadcrumb extends Spinner implements Breadcrumb { 42 43 private DropdownAdapter mAdapter; 44 DropdownBreadcrumb( Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes)45 public DropdownBreadcrumb( 46 Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) { 47 super(context, attrs, defStyleAttr, defStyleRes); 48 } 49 DropdownBreadcrumb(Context context, AttributeSet attrs, int defStyleAttr)50 public DropdownBreadcrumb(Context context, AttributeSet attrs, int defStyleAttr) { 51 super(context, attrs, defStyleAttr); 52 } 53 DropdownBreadcrumb(Context context, AttributeSet attrs)54 public DropdownBreadcrumb(Context context, AttributeSet attrs) { 55 super(context, attrs); 56 } 57 DropdownBreadcrumb(Context context)58 public DropdownBreadcrumb(Context context) { 59 super(context); 60 } 61 62 @Override setup(Environment env, State state, IntConsumer listener)63 public void setup(Environment env, State state, IntConsumer listener) { 64 mAdapter = new DropdownAdapter(state, env); 65 setOnItemSelectedListener( 66 new OnItemSelectedListener() { 67 @Override 68 public void onItemSelected( 69 AdapterView<?> parent, View view, int position, long id) { 70 listener.accept(position); 71 } 72 73 @Override 74 public void onNothingSelected(AdapterView<?> parent) {} 75 }); 76 } 77 78 @Override show(boolean visibility)79 public void show(boolean visibility) { 80 if (visibility) { 81 setVisibility(VISIBLE); 82 setAdapter(mAdapter); 83 } else { 84 setVisibility(GONE); 85 setAdapter(null); 86 } 87 } 88 89 @Override postUpdate()90 public void postUpdate() { 91 setSelection(mAdapter.getCount() - 1, false); 92 } 93 94 private static final class DropdownAdapter extends BaseAdapter { 95 private Environment mEnv; 96 private State mState; 97 DropdownAdapter(State state, Environment env)98 public DropdownAdapter(State state, Environment env) { 99 mState = state; 100 mEnv = env; 101 } 102 103 @Override getCount()104 public int getCount() { 105 return mState.stack.size(); 106 } 107 108 @Override getItem(int position)109 public DocumentInfo getItem(int position) { 110 return mState.stack.get(position); 111 } 112 113 @Override getItemId(int position)114 public long getItemId(int position) { 115 return position; 116 } 117 118 @Override getView(int position, View convertView, ViewGroup parent)119 public View getView(int position, View convertView, ViewGroup parent) { 120 if (convertView == null) { 121 convertView = LayoutInflater.from(parent.getContext()) 122 .inflate(R.layout.item_subdir_title, parent, false); 123 } 124 125 final TextView title = (TextView) convertView.findViewById(android.R.id.title); 126 final DocumentInfo doc = getItem(position); 127 128 if (position == 0) { 129 final RootInfo root = mEnv.getCurrentRoot(); 130 title.setText(root.title); 131 } else { 132 title.setText(doc.displayName); 133 } 134 135 return convertView; 136 } 137 138 @Override getDropDownView(int position, View convertView, ViewGroup parent)139 public View getDropDownView(int position, View convertView, ViewGroup parent) { 140 if (convertView == null) { 141 convertView = LayoutInflater.from(parent.getContext()) 142 .inflate(R.layout.item_subdir, parent, false); 143 } 144 145 final TextView title = (TextView) convertView.findViewById(android.R.id.title); 146 final DocumentInfo doc = getItem(position); 147 148 if (position == 0) { 149 final RootInfo root = mEnv.getCurrentRoot(); 150 title.setText(root.title); 151 } else { 152 title.setText(doc.displayName); 153 } 154 155 return convertView; 156 } 157 } 158 159 } 160