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      1 /*
      2  * Copyright (C) 2010 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.contacts.widget;
     18 
     19 import android.app.ListActivity;
     20 import android.content.Context;
     21 import android.database.Cursor;
     22 import android.database.MatrixCursor;
     23 import android.os.Bundle;
     24 import android.os.Handler;
     25 import android.view.LayoutInflater;
     26 import android.view.View;
     27 import android.view.ViewGroup;
     28 import android.widget.TextView;
     29 
     30 import com.android.contacts.R;
     31 
     32 /**
     33  * An activity that demonstrates various use cases for the {@link PinnedHeaderListView}.
     34  * If we decide to move PinnedHeaderListView to the framework, this class could go
     35  * to API demos.
     36  */
     37 public class PinnedHeaderListDemoActivity extends ListActivity {
     38 
     39     public final static class TestPinnedHeaderListAdapter extends PinnedHeaderListAdapter {
     40 
     41         public TestPinnedHeaderListAdapter(Context context) {
     42             super(context);
     43             setPinnedPartitionHeadersEnabled(true);
     44         }
     45 
     46         private String[] mHeaders;
     47         private int mPinnedHeaderCount;
     48 
     49         public void setHeaders(String[] headers) {
     50             this.mHeaders = headers;
     51         }
     52 
     53         @Override
     54         protected View newHeaderView(Context context, int partition, Cursor cursor,
     55                 ViewGroup parent) {
     56             LayoutInflater inflater = LayoutInflater.from(context);
     57             return inflater.inflate(R.layout.list_section, null);
     58         }
     59 
     60         @Override
     61         protected void bindHeaderView(View view, int parition, Cursor cursor) {
     62             TextView headerText = (TextView)view.findViewById(R.id.header_text);
     63             headerText.setText(mHeaders[parition]);
     64         }
     65 
     66         @Override
     67         protected View newView(Context context, int partition, Cursor cursor, int position,
     68                 ViewGroup parent) {
     69             LayoutInflater inflater = LayoutInflater.from(context);
     70             return inflater.inflate(android.R.layout.simple_list_item_1, null);
     71         }
     72 
     73         @Override
     74         protected void bindView(View v, int partition, Cursor cursor, int position) {
     75             TextView text = (TextView)v.findViewById(android.R.id.text1);
     76             text.setText(cursor.getString(1));
     77         }
     78 
     79         @Override
     80         public View getPinnedHeaderView(int viewIndex, View convertView, ViewGroup parent) {
     81             LayoutInflater inflater = LayoutInflater.from(getContext());
     82             View view = inflater.inflate(R.layout.list_section, parent, false);
     83             view.setFocusable(false);
     84             view.setEnabled(false);
     85             bindHeaderView(view, viewIndex, null);
     86             return view;
     87         }
     88 
     89         @Override
     90         public int getPinnedHeaderCount() {
     91             return mPinnedHeaderCount;
     92         }
     93     }
     94 
     95     private Handler mHandler = new Handler();
     96 
     97     @Override
     98     protected void onCreate(Bundle bundle) {
     99         super.onCreate(bundle);
    100 
    101         setContentView(R.layout.pinned_header_list_demo);
    102 
    103         final TestPinnedHeaderListAdapter adapter = new TestPinnedHeaderListAdapter(this);
    104 
    105         Bundle extras = getIntent().getExtras();
    106         int[] counts = extras.getIntArray("counts");
    107         String[] names = extras.getStringArray("names");
    108         boolean[] showIfEmpty = extras.getBooleanArray("showIfEmpty");
    109         boolean[] hasHeader = extras.getBooleanArray("headers");
    110         int[] delays = extras.getIntArray("delays");
    111 
    112         if (counts == null || names == null || showIfEmpty == null || delays == null) {
    113             throw new IllegalArgumentException("Missing required extras");
    114         }
    115 
    116         adapter.setHeaders(names);
    117         for (int i = 0; i < counts.length; i++) {
    118             adapter.addPartition(showIfEmpty[i], names[i] != null);
    119             adapter.mPinnedHeaderCount = names.length;
    120         }
    121         setListAdapter(adapter);
    122         for (int i = 0; i < counts.length; i++) {
    123             final int sectionId = i;
    124             final Cursor cursor = makeCursor(names[i], counts[i]);
    125             mHandler.postDelayed(new Runnable() {
    126 
    127                 public void run() {
    128                     adapter.changeCursor(sectionId, cursor);
    129 
    130                 }
    131             }, delays[i]);
    132         }
    133     }
    134 
    135     private Cursor makeCursor(String name, int count) {
    136         MatrixCursor cursor = new MatrixCursor(new String[]{"_id", name});
    137         for (int i = 0; i < count; i++) {
    138             cursor.addRow(new Object[]{i, name + "[" + i + "]"});
    139         }
    140         return cursor;
    141     }
    142 }
    143