实现一个简单的appwidget

主要的功能有 显示时间 日期，显示考研倒计时间，显示天气，显示目标，以及一些励志话语等。

1.首先定义appwidget 的描述xml文件

在res文件下新建xml文件夹 新建kaoyan.xml文件

        
                
  1. <?xmlversion="1.0"encoding="utf-8"?>
    2.             
    3.             
  3. <appwidget-providerxmlns:android="http://schemas.android.com/apk/res/android"
    4.             
    5.             
  5. android:minWidth="286dp"
    6.             
    7.             
  7. android:minHeight="142dp"
    8.             
    9.             
  9. android:initialLayout="@layout/kaoyan_widget"
    10.             
    11.             
  11. android:updatePeriodMillis="180000"
    12.             
    13.             
  13. android:configure="com.kaoyan.KaoyanActivity"
    14.             
    15.             
  15. >
    16.             
  16. </appwidget-provider>
    17.

  1. android:minWidth="286dp" //宽度
  3. android:minHeight="142dp" //高度
  5. android:initialLayout="@layout/kaoyan_widget" //布局文件
  7. android:updatePeriodMillis="180000"//刷新时间
  8. android:configure="com.kaoyan.KaoyanActivity" // 配置文件

2.建立相应的layout文件

        
                
  1. <?xmlversion="1.0"encoding="utf-8"?>
    2.             
  2. <LinearLayoutxmlns:android="http://schemas.android.com/apk/res/android"
    3.             
  3. android:layout_width="fill_parent"
    4.             
  4. android:layout_height="fill_parent"
    5.             
  5. android:orientation="horizontal"
    6.             
  6. android:background="@drawable/beijing">
    7.             
    8.             
    9.             
  9. <LinearLayout
    10.             
  10. android:layout_width="200dp"
    11.             
  11. android:layout_height="fill_parent"
    12.             
  12. android:paddingLeft="35dp"
    13.             
  13. android:paddingTop="35dp"
    14.             
  14. android:orientation="vertical"
    15.             
    16.             
  16. >
    17.             
  17. <TextView
    18.             
  18. android:id="@+id/daojishi"
    19.             
  19. android:layout_height="wrap_content"
    20.             
  20. android:textColor="#ffffff"
    21.             
  21. android:paddingLeft="100dp"
    22.             
  22. android:layout_width="wrap_content"
    23.             
  23. android:gravity="center"
    24.             
  24. android:textSize="15dp"
    25.             
  25. android:text="300天"
    26.             
  26. />
    27.             
  27. <TextView
    28.             
  28. android:id="@+id/time"
    29.             
  29. android:layout_height="wrap_content"
    30.             
  30. android:textColor="#ffffff"
    31.             
  31. android:layout_marginTop="5dp"
    32.             
  32. android:layout_width="150dp"
    33.             
  33. android:gravity="center"
    34.             
  34. android:textSize="10dp"
    35.             
  35. android:text=""
    36.             
  36. />
    37.             
  37. <TextView
    38.             
  38. android:id="@+id/mymubiao"
    39.             
  39. android:layout_width="150dp"
    40.             
  40. android:layout_height="wrap_content"
    41.             
  41. android:paddingTop="5dp"
    42.             
  42. android:textColor="#ffffff"
    43.             
  43. android:gravity="center"
    44.             
  44. android:text=""
    45.             
  45. />
    46.             
  46. <TextView
    47.             
  47. android:id="@+id/yanyu"
    48.             
  48. android:layout_width="wrap_content"
    49.             
  49. android:layout_height="wrap_content"
    50.             
  50. android:paddingTop="5dp"
    51.             
  51. android:textColor="#ffffff"
    52.             
  52. android:text=""
    53.             
  53. />
    54.             
  54. <TextView
    55.             
  55. android:id="@+id/tishi"
    56.             
  56. android:layout_width="wrap_content"
    57.             
  57. android:layout_height="wrap_content"
    58.             
  58. android:paddingTop="5dp"
    59.             
  59. android:textColor="#ffffff"
    60.             
  60. android:text=""
    61.             
  61. />
    62.             
  62. </LinearLayout>
    63.             
    64.             
    65.             
  65. <LinearLayout
    66.             
  66. android:layout_width="fill_parent"
    67.             
  67. android:layout_height="fill_parent"
    68.             
  68. android:paddingTop="35dp"
    69.             
  69. android:orientation="vertical"
    70.             
  70. >
    71.             
  71. <ImageView
    72.             
  72. android:id="@+id/tupian"
    73.             
  73. android:layout_width="45dp"
    74.             
  74. android:layout_height="45dp"
    75.             
  75. android:layout_marginLeft="20dp"
    76.             
  76. android:src="@drawable/qingtian"
    77.             
  77. />
    78.             
  78. <TextView
    79.             
  79. android:id="@+id/tianqi"
    80.             
  80. android:layout_width="wrap_content"
    81.             
  81. android:layout_height="wrap_content"
    82.             
  82. android:textColor="#ffffff"
    83.             
  83. android:textSize="8dp"
    84.             
  84. android:text=""/>
    85.             
  85. <TextView
    86.             
  86. android:id="@+id/mingtian"
    87.             
  87. android:layout_width="wrap_content"
    88.             
  88. android:layout_height="wrap_content"
    89.             
  89. android:textColor="#ffffff"
    90.             
  90. android:textSize="8dp"
    91.             
  91. android:text=""/>
    92.             
  92. </LinearLayout>
    93.             
    94.             
  94. </LinearLayout>
    95.

4，建立相应的AppWidgetProvider类

        
                
  1. packagecom.kaoyan;
    2.             
    3.             
  3. importjava.io.IOException;
    4.             
  4. importjava.io.InputStream;
    5.             
  5. importjava.net.MalformedURLException;
    6.             
  6. importjava.net.URL;
    7.             
  7. importjava.net.URLConnection;
    8.             
  8. importjava.text.SimpleDateFormat;
    9.             
  9. importjava.util.Date;
    10.             
    11.             
  11. importorg.xmlpull.v1.XmlPullParserException;
    12.             
    13.             
  13. importandroid.app.Service;
    14.             
  14. importandroid.appwidget.AppWidgetManager;
    15.             
  15. importandroid.appwidget.AppWidgetProvider;
    16.             
  16. importandroid.content.ComponentName;
    17.             
  17. importandroid.content.Context;
    18.             
  18. importandroid.content.Intent;
    19.             
  19. importandroid.os.Handler;
    20.             
  20. importandroid.os.IBinder;
    21.             
  21. importandroid.util.Log;
    22.             
  22. importandroid.widget.RemoteViews;
    23.             
    24.             
  24. publicclasskaoyanWidgetextendsAppWidgetProvider{
    25.             
    26.             
  26. @Override
    27.             
  27. publicvoidonDisabled(Contextcontext){
    28.             
  28. //TODOAuto-generatedmethodstub
    29.             
  29. super.onDisabled(context);
    30.             
  30. Log.i("kaoyanWidget","onDisabled");
    31.             
  31. }
    32.             
  32. @Override
    33.             
  33. publicvoidonEnabled(Contextcontext){
    34.             
  34. //TODOAuto-generatedmethodstub
    35.             
  35. super.onEnabled(context);
    36.             
  36. Log.i("kaoyanWidget","onEnabled");
    37.             
  37. }
    38.             
  38. @Override
    39.             
  39. publicvoidonReceive(Contextcontext,Intentintent){
    40.             
  40. //TODOAuto-generatedmethodstub
    41.             
  41. super.onReceive(context,intent);
    42.             
  42. Log.i("onReceive",intent.getAction());
    43.             
  43. }
    44.             
  44. @Override
    45.             
  45. publicvoidonUpdate(Contextcontext,AppWidgetManagerappWidgetManager,
    46.             
  46. int[]appWidgetIds){
    47.             
  47. //TODOAuto-generatedmethodstub
    48.             
    49.             
  49. Log.i("update","开始更新");
    50.             
  50. Log.i("update",appWidgetManager.getInstalledProviders().size()+"");
    51.             
  51. Intentintent=newIntent(context,UpdateService.class);
    52.             
  52. context.startService(intent);
    53.             
  53. URLaURL;
    54.             
  54. try{
    55.             
  55. aURL=newURL("http://www.google.com/ig/api?hl=zh_cn&weather=beijing");
    56.             
  56. URLConnectioncon=aURL.openConnection();
    57.             
  57. InputStreamis=con.getInputStream();
    58.             
  58. xmlParsermXml=newxmlParser();
    59.             
  59. weathermweather=mXml.parser(is);
    60.             
  60. RemoteViewsviews=newRemoteViews("com.kaoyan",R.layout.kaoyan_widget);
    61.             
  61. views.setTextViewText(R.id.tianqi,"天气："+mweather.getCondition()+"气温："+mweather.getTemp_c());
    62.             
  62. views.setTextViewText(R.id.mingtian,"明天："+mweather.getmCondition()+""+mweather.getLow()+"~"+mweather.getHigh());
    63.             
  63. Log.i("update","天气："+mweather.getCondition()+"气温："+mweather.getTemp_c());
    64.             
  64. Log.i("update","明天："+mweather.getmCondition()+""+mweather.getLow()+"~"+mweather.getHigh());
    65.             
  65. appWidgetManager.updateAppWidget(appWidgetIds,views);
    66.             
  66. for(inti=0;i<appWidgetIds.length;i++)
    67.             
  67. Log.i("appWidgetIds",appWidgetIds[i]+"");
    68.             
  68. }catch(MalformedURLExceptione){
    69.             
  69. //TODOAuto-generatedcatchblock
    70.             
  70. e.printStackTrace();
    71.             
  71. }catch(XmlPullParserExceptione){
    72.             
  72. //TODOAuto-generatedcatchblock
    73.             
  73. e.printStackTrace();
    74.             
  74. }catch(IOExceptione){
    75.             
  75. //TODOAuto-generatedcatchblock
    76.             
  76. e.printStackTrace();
    77.             
  77. }
    78.             
    79.             
  79. super.onUpdate(context,appWidgetManager,appWidgetIds);
    80.             
  80. Log.i("update","更新结束");
    81.             
  81. }
    82.             
  82. @Override
    83.             
  83. publicvoidonDeleted(Contextcontext,int[]appWidgetIds){
    84.             
  84. //TODOAuto-generatedmethodstub
    85.             
  85. Intentintent=newIntent(context,UpdateService.class);
    86.             
  86. context.stopService(intent);
    87.             
    88.             
  88. super.onDeleted(context,appWidgetIds);
    89.             
  89. Log.i("delete",appWidgetIds.toString());
    90.             
  90. }
    91.             
    92.             
  92. publicstaticclassUpdateServiceextendsService{
    93.             
  93. privateHandlerobjHandler=newHandler();
    94.             
  94. privateRunnablemTasks=newRunnable(){
    95.             
    96.             
  96. publicvoidrun(){
    97.             
  97. //TODOAuto-generatedmethodstub
    98.             
  98. RemoteViewsviews=newRemoteViews(UpdateService.this.getPackageName(),R.layout.kaoyan_widget);
    99.             
  99. SimpleDateFormatsdf=newSimpleDateFormat("yyyy年MM月dd日hh:mm:ss");
    100.             
  100. views.setTextViewText(R.id.time,""+sdf.format(newDate()));
    101.             
  101. ComponentNamethisWidget=newComponentName(UpdateService.this,kaoyanWidget.class);
    102.             
  102. AppWidgetManagermanager=AppWidgetManager.getInstance(UpdateService.this);
    103.             
  103. manager.updateAppWidget(thisWidget,views);
    104.             
  104. objHandler.postDelayed(mTasks,1000);
    105.             
  105. }};
    106.             
    107.             
  107. @Override
    108.             
  108. publicIBinderonBind(Intentarg0){
    109.             
  109. //TODOAuto-generatedmethodstub
    110.             
  110. returnnull;
    111.             
  111. }
    112.             
    113.             
  113. @Override
    114.             
  114. publicvoidonStart(Intentintent,intstartId){
    115.             
  115. //TODOAuto-generatedmethodstub
    116.             
  116. Log.i("Service","onStart");
    117.             
  117. super.onStart(intent,startId);
    118.             
  118. objHandler.postDelayed(mTasks,1000);
    119.             
    120.             
  120. }
    121.             
    122.             
  122. @Override
    123.             
  123. publicvoidonDestroy(){
    124.             
  124. //TODOAuto-generatedmethodstub
    125.             
  125. super.onDestroy();
    126.             
  126. Log.i("Service","onDestroy");
    127.             
  127. }
    128.             
    129.             
  129. }
    130.             
    131.             
    132.             
    133.             
    134.             
    135.             
  135. }
    136.

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