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ADC Demo

分类: 文章 • 2024-10-18 18:32:53

ADCActivity.java

  1. packagecom.mini6410.ADC;
  3. importjava.util.Timer;
  4. importjava.util.TimerTask;
  6. importandroid.app.Activity;
  7. importandroid.os.Bundle;
  8. importandroid.os.Handler;
  9. importandroid.os.Message;
  10. importandroid.util.Log;
  11. importandroid.widget.TextView;
  13. importcom.friendlyarm.AndroidSDK.HardwareControler;
  14. importcom.mini6410.R;
  16. /**
  17. *
  18. *ClassName:ADCActivity
  19. *Reason:ADCDemo
  20. *
  21. *@authorsnowdream
  22. *@version
  23. *@sinceVer1.1
  24. *@Date20112012-03-1612:04
  25. *
  26. *@see
  27. */
  28. publicclassADCActivityextendsActivity{
  29. privatestaticfinalStringTAG="ADCActivity";
  31. /*刷新UI标记*/
  32. publicstaticfinalintUpdate_UI=0;
  34. /*计时器*/
  35. privateTimermTimer=null;
  36. privateTimerTaskmTimerTask=null;
  38. /*用来显示ADC返回值的控件*/
  39. privateTextViewmTextView_ADC=null;
  41. /*读取ADC的返回值*/
  42. privateintresult=0;
  44. @Override
  45. protectedvoidonCreate(BundlesavedInstanceState){
  46. super.onCreate(savedInstanceState);
  47. setContentView(R.layout.adcdemo);
  49. initUI();
  50. initData();
  51. }
  53. /**
  54. *
  55. *initUI:初始化UI
  56. *
  57. *@param
  58. *@return
  59. *@throws
  60. */
  61. privatevoidinitUI(){
  62. mTextView_ADC=(TextView)findViewById(R.id.TextView_adcresult);
  63. }
  65. /**
  66. *
  67. *initData:新建定时器，每隔500ms发出消息，通知Activity刷新UI一次。
  68. *
  69. *@param
  70. *@return
  71. *@throws
  72. */
  73. privatevoidinitData(){
  74. mTimer=newTimer();
  75. mTimerTask=newTimerTask(){
  76. @Override
  77. publicvoidrun(){
  79. /*调用底层库API读取ADC的值，正常情况下，返回ADC值，否则，出错，返回-1*/
  80. result=HardwareControler.readADC();
  82. if(-1==result){
  83. Log.e(TAG,"ReadADCError!");
  84. }else{
  85. Log.i(TAG,"readADCresult:"+result);
  86. mHandler.sendMessage(mHandler.obtainMessage(Update_UI));
  87. }
  88. }
  89. };
  90. mTimer.schedule(mTimerTask,0,500);
  91. }
  93. privateHandlermHandler=newHandler(){
  94. @Override
  95. publicvoidhandleMessage(Messagemsg){
  96. inttype=msg.what;
  97. switch(type){
  98. caseUpdate_UI:
  99. mTextView_ADC.setText(String.valueOf(result));
  100. break;
  101. default:
  102. break;
  103. }
  104. }
  106. };
  108. @Override
  109. protectedvoidonDestroy(){
  110. if(mTimer!=null){
  111. mTimer.cancel();
  112. mTimer=null;
  113. }
  114. super.onDestroy();
  115. }
  118. }

adcdemo.xml

  1. <?xmlversion="1.0"encoding="utf-8"?>
  2. <LinearLayoutxmlns:android="http://schemas.android.com/apk/res/android"
  3. android:layout_width="fill_parent"
  4. android:layout_height="fill_parent"
  5. android:orientation="vertical">
  7. <TextView
  8. android:id="@+id/TextView_adctitle"
  9. android:layout_width="wrap_content"
  10. android:layout_height="wrap_content"
  11. android:gravity="center"
  12. android:text="@string/adcreslt"
  13. android:textSize="25sp"/>
  15. <TextView
  16. android:id="@+id/TextView_adcresult"
  17. android:layout_width="fill_parent"
  18. android:layout_height="130dip"
  19. android:gravity="center"
  20. android:text="0"
  21. android:textColor="@drawable/mediumvioletred"
  22. android:textSize="80sp"/>
  25. </LinearLayout>

预览效果:ADC Demo

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