1 /*
2 * Copyright 2013 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.example.android.common.logger;
18 
19 import android.graphics.Typeface;
20 import android.os.Bundle;
21 import android.support.v4.app.Fragment;
22 import android.text.Editable;
23 import android.text.TextWatcher;
24 import android.view.Gravity;
25 import android.view.LayoutInflater;
26 import android.view.View;
27 import android.view.ViewGroup;
28 import android.widget.ScrollView;
29 
30 /**
31  * Simple fragment which contains a LogView and uses is to output log data it receives
32  * through the LogNode interface.
33  */
34 public class LogFragment extends Fragment {
35 
36     private LogView mLogView;
37     private ScrollView mScrollView;
38 
LogFragment()39     public LogFragment() {}
40 
inflateViews()41     public View inflateViews() {
42         mScrollView = new ScrollView(getActivity());
43         ViewGroup.LayoutParams scrollParams = new ViewGroup.LayoutParams(
44                 ViewGroup.LayoutParams.MATCH_PARENT,
45                 ViewGroup.LayoutParams.MATCH_PARENT);
46         mScrollView.setLayoutParams(scrollParams);
47 
48         mLogView = new LogView(getActivity());
49         ViewGroup.LayoutParams logParams = new ViewGroup.LayoutParams(scrollParams);
50         logParams.height = ViewGroup.LayoutParams.WRAP_CONTENT;
51         mLogView.setLayoutParams(logParams);
52         mLogView.setClickable(true);
53         mLogView.setFocusable(true);
54         mLogView.setTypeface(Typeface.MONOSPACE);
55 
56         // Want to set padding as 16 dips, setPadding takes pixels.  Hooray math!
57         int paddingDips = 16;
58         double scale = getResources().getDisplayMetrics().density;
59         int paddingPixels = (int) ((paddingDips * (scale)) + .5);
60         mLogView.setPadding(paddingPixels, paddingPixels, paddingPixels, paddingPixels);
61         mLogView.setCompoundDrawablePadding(paddingPixels);
62 
63         mLogView.setGravity(Gravity.BOTTOM);
64         mLogView.setTextAppearance(getActivity(), android.R.style.TextAppearance_Holo_Medium);
65 
66         mScrollView.addView(mLogView);
67         return mScrollView;
68     }
69 
70     @Override
onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState)71     public View onCreateView(LayoutInflater inflater, ViewGroup container,
72                              Bundle savedInstanceState) {
73 
74         View result = inflateViews();
75 
76         mLogView.addTextChangedListener(new TextWatcher() {
77             @Override
78             public void beforeTextChanged(CharSequence s, int start, int count, int after) {}
79 
80             @Override
81             public void onTextChanged(CharSequence s, int start, int before, int count) {}
82 
83             @Override
84             public void afterTextChanged(Editable s) {
85                 mScrollView.fullScroll(ScrollView.FOCUS_DOWN);
86             }
87         });
88         return result;
89     }
90 
getLogView()91     public LogView getLogView() {
92         return mLogView;
93     }
94 }