android wearable 研究

android 4.4W.2是用于智能手表开发，建议用android studio开发，不过也可以用eclipse，因为是新系统，所以网上的demo比较少。只有在developer上可以看到几个简单的demo，但是需要，我把开发文档都保存下来：

http://download.csdn.net/detail/chaoyue0071/8369241

开发者链接：http://developer.android.com/training/building-wearables.html

针对手表小屏幕的关系，android 有一套新的ui库去适配，具体sample可以用 sdk manager管理下载

这个库可以帮你专为可穿戴设备构建UI，一些主要的类包括：

BoxInsetLayout - 一个FrameLayout ，可以自适应屏幕形状，可以把子View填充进屏幕的中间。

CardFragment - 一个可扩展内容的Fragment，可垂直滚动的卡片

CircledImageView - 圆形的ImageView

ConfirmationActivity - 一个Activity，当用户完成某个操作的时候会有确认动画

DismissOverlayView - 一个实现了长按消失的view

GridViewPager - 一个可以允许用户垂直和水平滑动页面的控件，可以实现一个GridPagerAdapter 来展现数据

WatchViewStub - 根据屏幕的形状来渲染一个特殊的布局的类

WearableListView - 专门为小屏幕的可穿戴设备而优化的listview，显示一个可垂直滚动的列表。当用户停止滑动的时候，会自动将最近的项吸附住。

用eclipse可以开发，等下会附录下载地址

以wearablelistview为例开发

WearableListView是适用于android小型设备如智能手表显示列表的组件，可以村子滚动，非常方便的在只能手表上显示列表控件，每次显示三个列表在屏幕中间位置。

它继承RecyclerView，实现了OnScrollListener接口。

view source print ? 1. public class WearableListView extends android.support.v7.widget.RecyclerView 2. implements android.support.v7.widget.RecyclerView.OnScrollListener { 3. 4. …. 5. …. 6. } 下面是使用的例子

view source print ? 01. package com.technotalkative.wearablelistviewdemo; 02. 03. import android.app.Activity; 04. import android.content.Context; 05. import android.os.Bundle; 06. import android.support.wearable.view.WatchViewStub; 07. import android.support.wearable.view.WearableListView; 08. import android.view.LayoutInflater; 09. import android.view.ViewGroup; 10. import android.widget.TextView; 11. 12. import java.util.ArrayList; 13. 14. public class SimpleListActivity extends Activity implements WearableListView.ClickListener{ 15. 16. private WearableListView mListView; 17. 18. @Override 19. protected void onCreate(Bundle savedInstanceState) { 20. super.onCreate(savedInstanceState); 21. setContentView(R.layout.activity_my); 22. final WatchViewStub stub = (WatchViewStub) findViewById(R.id.watch_view_stub); 23. stub.setOnLayoutInflatedListener(new WatchViewStub.OnLayoutInflatedListener() { 24. @Override 25. public void onLayoutInflated(WatchViewStub stub) { 26. mListView = (WearableListView) stub.findViewById(R.id.listView1); 27. mListView.setAdapter(new MyAdapter(SimpleListActivity.this)); 28. mListView.setClickListener(SimpleListActivity.this); 29. } 30. }); 31. } 32. 33. private static ArrayList listItems; 34. static { 35. listItems = new ArrayList(); 36. listItems.add("Monday"); 37. listItems.add("Tuesday"); 38. listItems.add("Wednesday"); 39. listItems.add("Thursday"); 40. listItems.add("Friday"); 41. listItems.add("Saturday"); 42. } 43. 44. @Override 45. public void onClick(WearableListView.ViewHolder viewHolder) { 46. 47. } 48. 49. @Override 50. public void onTopEmptyRegionClick() { 51. 52. } 53. 54. private class MyAdapter extends WearableListView.Adapter { 55. private final LayoutInflater mInflater; 56. 57. private MyAdapter(Context context) { 58. mInflater = LayoutInflater.from(context); 59. } 60. 61. @Override 62. public WearableListView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) { 63. return new WearableListView.ViewHolder( 64. mInflater.inflate(R.layout.row_simple_item_layout, null)); 65. } 66. 67. @Override 68. public void onBindViewHolder(WearableListView.ViewHolder holder, int position) { 69. TextView view = (TextView) holder.itemView.findViewById(R.id.textView); 70. view.setText(listItems.get(position).toString()); 71. holder.itemView.setTag(position); 72. } 73. 74. @Override 75. public int getItemCount() { 76. return listItems.size(); 77. } 78. } 79. }

可以为该列表加入图标，更加漂亮

view source print ? 01. private final class MyItemView extends FrameLayout implements WearableListView.Item { 02. 03. final CircledImageView imgView; 04. final TextView txtView; 05. private float mScale; 06. private final int mFadedCircleColor; 07. private final int mChosenCircleColor; 08. 09. public MyItemView(Context context) { 10. super(context); 11. View.inflate(context, R.layout.row_advanced_item_layout, this); 12. imgView = (CircledImageView) findViewById(R.id.image); 13. txtView = (TextView) findViewById(R.id.text); 14. mFadedCircleColor = getResources().getColor(android.R.color.darker_gray); 15. mChosenCircleColor = getResources().getColor(android.R.color.holo_blue_dark); 16. } 17. 18. @Override 19. public float getProximityMinValue() { 20. return mDefaultCircleRadius; 21. } 22. 23. @Override 24. public float getProximityMaxValue() { 25. return mSelectedCircleRadius; 26. } 27. 28. @Override 29. public float getCurrentProximityValue() { 30. return mScale; 31. } 32. 33. @Override 34. public void setScalingAnimatorValue(float value) { 35. mScale = value; 36. imgView.setCircleRadius(mScale); 37. imgView.setCircleRadiusPressed(mScale); 38. } 39. 40. @Override 41. public void onScaleUpStart() { 42. imgView.setAlpha(1f); 43. txtView.setAlpha(1f); 44. imgView.setCircleColor(mChosenCircleColor); 45. } 46. 47. @Override 48. public void onScaleDownStart() { 49. imgView.setAlpha(0.5f); 50. txtView.setAlpha(0.5f); 51. imgView.setCircleColor(mFadedCircleColor); 52. } 53. }

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