Android圖片浏覽器之實現顯示圖片的標題

這裡有篇文章（http://www.linuxidc.com/Linux/2011-09/42550.htm）只是單純的顯示一個圖片，雖然我改進了，但是在使用的時候還是有一些地方不足。所以再次重寫，在原來的基礎上實現了以下小特點：

1、可以顯示標題：

2、原來的滑動速度非常快，這裡給它的速度降低了。

主要是重寫了Gallery。

廢話少說，源碼如下：

1. package cn.yj3g.GalleryTest2;
3. import java.util.HashMap;
5. import Android.app.Activity;
6. import android.content.Context;
7. import android.content.res.TypedArray;
8. import android.os.Bundle;
9. import android.util.Log;
10. import android.view.LayoutInflater;
11. import android.view.View;
12. import android.view.ViewGroup;
13. import android.view.Window;
14. import android.view.animation.AnimationUtils;
15. import android.widget.AdapterView;
16. import android.widget.BaseAdapter;
17. import android.widget.Gallery;
18. import android.widget.Gallery.LayoutParams;
19. import android.widget.ImageSwitcher;
20. import android.widget.ImageView;
21. import android.widget.TextView;
22. import android.widget.ViewSwitcher;
24. public class GalleryTestActivity extends Activity implements AdapterView.OnItemClickListener,
25. ViewSwitcher.ViewFactory {
27. @Override
28. public void onCreate(Bundle savedInstanceState) {
29. super.onCreate(savedInstanceState);
30. requestWindowFeature(Window.FEATURE_NO_TITLE);
33. setContentView(R.layout.image_switcher_1);
35. mSwitcher = (ImageSwitcher) findViewById(R.id.switcher);
36. mSwitcher.setFactory(this);
37. mSwitcher.setInAnimation(AnimationUtils.loadAnimation(this, android.R.anim.fade_in));
38. mSwitcher.setOutAnimation(AnimationUtils.loadAnimation(this, android.R.anim.fade_out));
40. Gallery g = (Gallery) findViewById(R.id.gallery);
41. g.setAdapter(new ImageAdapter(this, mThumbIds.length));
42. g.setOnItemClickListener(this);
43. // g.setOnItemSelectedListener(this);
44. g.setSelection(1);
45. }
48. public void onItemSelected(AdapterView parent, View v, int position, long id) {
49. mSwitcher.setImageResource(mThumbIds[position % mImageIds.length]);
50. }
52. public void onNothingSelected(AdapterView parent) {
53. }
55. @Override
56. public View makeView() {
57. Log.v("TAG", "makeView()");
58. ImageView i = new ImageView(this);
59. i.setBackgroundColor(0xFF000000);
60. i.setScaleType(ImageView.ScaleType.FIT_CENTER);
61. i.setLayoutParams(new ImageSwitcher.LayoutParams(LayoutParams.MATCH_PARENT,
62. LayoutParams.MATCH_PARENT));
63. return i;
64. }
66. private ImageSwitcher mSwitcher;
68. public class ImageAdapter extends BaseAdapter {
69. private int mGalleryItemBackground;
70. private HashMap<Integer, View> mViewMaps;
71. private int mCount;
72. private LayoutInflater mInflater;
74. public ImageAdapter(Context c, int count) {
75. this.mCount = count;
76. mViewMaps = new HashMap<Integer, View>(count);
77. mInflater = LayoutInflater.from(GalleryTestActivity.this);
78. // See res/values/attrs.xml for the <declare-styleable> that defines
79. // Gallery1.
80. TypedArray a = obtainStyledAttributes(R.styleable.Gallery1);
81. mGalleryItemBackground = a.getResourceId(
82. R.styleable.Gallery1_android_galleryItemBackground, 0);
83. a.recycle();
84. }
86. public int getCount() {
87. // return mImageIds.length;
88. return Integer.MAX_VALUE;
89. }
91. public Object getItem(int position) {
92. return position;
93. }
95. public long getItemId(int position) {
96. return position;
97. }
99. public View getView(int position, View convertView, ViewGroup parent) {
100. Log.v("TAG", "getView() position=" + position + " convertView=" + convertView);
101. View viewGroup = mViewMaps.get(position%mCount);
102. ImageView imageView = null;
103. TextView textView = null;
104. if(viewGroup==null) {
105. viewGroup = mInflater.inflate(R.layout.gallery_item, null);
106. imageView = (ImageView) viewGroup.findViewById(R.id.item_gallery_image);
107. textView = (TextView) viewGroup.findViewById(R.id.item_gallery_text);
108. imageView.setBackgroundResource(mGalleryItemBackground);
109. mViewMaps.put(position%mCount, viewGroup);
110. imageView.setImageResource(mImageIds[position % mImageIds.length]);
111. textView.setText(titles[position % mImageIds.length]);
112. }
114. return viewGroup;
115. }
116. }
118. private String[] titles = {"標題1","標題2","標題3","標題4","標題5","標題6","標題7","標題8",};
119. private Integer[] mThumbIds = { R.drawable.sample_0, R.drawable.sample_1, R.drawable.sample_2,
120. R.drawable.sample_3, R.drawable.sample_4, R.drawable.sample_5, R.drawable.sample_6,
121. R.drawable.sample_7 };
123. private Integer[] mImageIds = { R.drawable.sample_thumb_0, R.drawable.sample_thumb_1,
124. R.drawable.sample_thumb_2, R.drawable.sample_thumb_3, R.drawable.sample_thumb_4,
125. R.drawable.sample_thumb_5, R.drawable.sample_thumb_6, R.drawable.sample_thumb_7 };
127. @Override
128. public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
129. mSwitcher.setImageResource(mThumbIds[position % mImageIds.length]);
130. }
132. }