{"id":301,"date":"2013-11-26T08:16:56","date_gmt":"2013-11-26T00:16:56","guid":{"rendered":"http:\/\/www.menglanglang.cn\/?p=301"},"modified":"2015-12-22T18:34:24","modified_gmt":"2015-12-22T10:34:24","slug":"android%e6%92%ad%e6%94%be%e9%9f%b3%e4%b9%90%e6%97%b6%e8%b7%b3%e5%8a%a8%e7%9a%84%e5%b1%8f%e8%b0%b1demo","status":"publish","type":"post","link":"http:\/\/www.menglanglang.cn\/?p=301","title":{"rendered":"Android\u64ad\u653e\u97f3\u4e50\u65f6\u8df3\u52a8\u7684\u5c4f\u8c31demo"},"content":{"rendered":"

Android\u5b9e\u73b0\u64ad\u653e\u97f3\u9891\u65f6\u7684\u8df3\u52a8\u9891\u8c31\uff0c\u5e76\u5b9e\u73b0\u53ef\u4ee5\u8c03\u8282\u7684\u5747\u8861\u5668\u3002<\/span><\/p>\n

Main.java<\/strong><\/p>\n

\n
<\/div>\n
    \n
  1. package<\/span>\u00a0com.wjq.audiofx;<\/li>\n
  2. <\/li>\n
  3. import<\/span>\u00a0android.app.Activity;<\/li>\n
  4. import<\/span>\u00a0android.media.AudioManager;<\/li>\n
  5. import<\/span>\u00a0android.media.MediaPlayer;<\/li>\n
  6. import<\/span>\u00a0android.media.audiofx.Equalizer;<\/li>\n
  7. import<\/span>\u00a0android.media.audiofx.Visualizer;<\/li>\n
  8. import<\/span>\u00a0android.os.Bundle;<\/li>\n
  9. import<\/span>\u00a0android.util.Log;<\/li>\n
  10. import<\/span>\u00a0android.view.Gravity;<\/li>\n
  11. import<\/span>\u00a0android.view.ViewGroup;<\/li>\n
  12. import<\/span>\u00a0android.widget.LinearLayout;<\/li>\n
  13. import<\/span>\u00a0android.widget.SeekBar;<\/li>\n
  14. import<\/span>\u00a0android.widget.TextView;<\/li>\n
  15. <\/li>\n
  16. public<\/span>\u00a0class<\/span>\u00a0Main\u00a0extends<\/span>\u00a0Activity\u00a0{<\/li>\n
  17. \u00a0\u00a0\u00a0\u00a0private<\/span>\u00a0static<\/span>\u00a0final<\/span>\u00a0String\u00a0TAG\u00a0=\u00a0\"AudioFxDemo\"<\/span>;<\/li>\n
  18. <\/li>\n
  19. \u00a0\u00a0\u00a0\u00a0private<\/span>\u00a0static<\/span>\u00a0final<\/span>\u00a0float<\/span>\u00a0VISUALIZER_HEIGHT_DIP\u00a0=\u00a050f;<\/li>\n
  20. <\/li>\n
  21. \u00a0\u00a0\u00a0\u00a0private<\/span>\u00a0MediaPlayer\u00a0mMediaPlayer;<\/li>\n
  22. \u00a0\u00a0\u00a0\u00a0private<\/span>\u00a0Visualizer\u00a0mVisualizer;<\/li>\n
  23. \u00a0\u00a0\u00a0\u00a0private<\/span>\u00a0Equalizer\u00a0mEqualizer;\/\/\u5747\u6a2a\u5668<\/span><\/li>\n
  24. <\/li>\n
  25. \u00a0\u00a0\u00a0\u00a0private<\/span>\u00a0LinearLayout\u00a0mLinearLayout;<\/li>\n
  26. \u00a0\u00a0\u00a0\u00a0VisualizerView\u00a0mVisualizerView;<\/li>\n
  27. \u00a0\u00a0\u00a0\u00a0private<\/span>\u00a0TextView\u00a0mStatusTextView;<\/li>\n
  28. <\/li>\n
  29. \u00a0\u00a0\u00a0\u00a0@Override<\/span><\/li>\n
  30. \u00a0\u00a0\u00a0\u00a0public<\/span>\u00a0void<\/span>\u00a0onCreate(Bundle\u00a0icicle)\u00a0{<\/li>\n
  31. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0super<\/span>.onCreate(icicle);<\/li>\n
  32. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0setVolumeControlStream(AudioManager.STREAM_MUSIC);<\/li>\n
  33. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0mStatusTextView\u00a0=\u00a0new<\/span>\u00a0TextView(this<\/span>);<\/li>\n
  34. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0mLinearLayout\u00a0=\u00a0new<\/span>\u00a0LinearLayout(this<\/span>);<\/li>\n
  35. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0mLinearLayout.setOrientation(LinearLayout.VERTICAL);<\/li>\n
  36. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0mLinearLayout.addView(mStatusTextView);<\/li>\n
  37. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0setContentView(mLinearLayout);<\/li>\n
  38. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\/\/\u00a0Create\u00a0the\u00a0MediaPlayer<\/span><\/li>\n
  39. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0mMediaPlayer\u00a0=\u00a0MediaPlayer.create(this<\/span>,\u00a0R.raw.test_cbr);<\/li>\n
  40. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0if<\/span>(\u00a0null<\/span>\u00a0==\u00a0mMediaPlayer\u00a0)<\/li>\n
  41. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0return<\/span>\u00a0;<\/li>\n
  42. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0Log.d(TAG,\u00a0\"MediaPlayer\u00a0audio\u00a0session\u00a0ID:\u00a0\"<\/span>\u00a0+\u00a0mMediaPlayer.getAudioSessionId());<\/li>\n
  43. <\/li>\n
  44. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0setupVisualizerFxAndUI();<\/li>\n
  45. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0setupEqualizerFxAndUI();<\/li>\n
  46. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\/\/\u00a0Make\u00a0sure\u00a0the\u00a0visualizer\u00a0is\u00a0enabled\u00a0only\u00a0when\u00a0you\u00a0actually\u00a0want\u00a0to\u00a0receive\u00a0data,\u00a0and<\/span><\/li>\n
  47. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\/\/\u00a0when\u00a0it\u00a0makes\u00a0sense\u00a0to\u00a0receive\u00a0data.<\/span><\/li>\n
  48. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0mVisualizer.setEnabled(true<\/span>);<\/li>\n
  49. <\/li>\n
  50. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\/\/\u00a0When\u00a0the\u00a0stream\u00a0ends,\u00a0we\u00a0don't\u00a0need\u00a0to\u00a0collect\u00a0any\u00a0more\u00a0data.\u00a0We\u00a0don't\u00a0do\u00a0this\u00a0in<\/span><\/li>\n
  51. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\/\/\u00a0setupVisualizerFxAndUI\u00a0because\u00a0we\u00a0likely\u00a0want\u00a0to\u00a0have\u00a0more,\u00a0non-Visualizer\u00a0related\u00a0code<\/span><\/li>\n
  52. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\/\/\u00a0in\u00a0this\u00a0callback.<\/span><\/li>\n
  53. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0mMediaPlayer.setOnCompletionListener(new<\/span>\u00a0MediaPlayer.OnCompletionListener()\u00a0{<\/li>\n
  54. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0public<\/span>\u00a0void<\/span>\u00a0onCompletion(MediaPlayer\u00a0mediaPlayer)\u00a0{<\/li>\n
  55. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0mVisualizer.setEnabled(false<\/span>);<\/li>\n
  56. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0}<\/li>\n
  57. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0});<\/li>\n
  58. <\/li>\n
  59. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0mMediaPlayer.start();<\/li>\n
  60. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0mStatusTextView.setText(\"\u64ad\u653e\u97f3\u9891...\"<\/span>);<\/li>\n
  61. \u00a0\u00a0\u00a0\u00a0}<\/li>\n
  62. <\/li>\n
  63. \u00a0\u00a0\u00a0\u00a0\/**<\/span><\/li>\n
  64. \u00a0\u00a0\u00a0\u00a0\u00a0*\u00a0\u901a\u8fc7mMediaPlayer\u8fd4\u56de\u7684AudioSessionId\u521b\u5efa\u4e00\u4e2a\u4f18\u5148\u7ea7\u4e3a0\u5747\u8861\u5668\u5bf9\u8c61,\u5e76\u4e14\u901a\u8fc7\u9891\u8c31\u751f\u6210\u76f8\u5e94\u7684UI\u548c\u5bf9\u5e94\u7684\u4e8b\u4ef6<\/span><\/li>\n
  65. \u00a0\u00a0\u00a0\u00a0\u00a0*\/<\/span><\/li>\n
  66. \u00a0\u00a0\u00a0\u00a0private<\/span>\u00a0void<\/span>\u00a0setupEqualizerFxAndUI()\u00a0{<\/li>\n
  67. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0mEqualizer\u00a0=\u00a0new<\/span>\u00a0Equalizer(0<\/span>,\u00a0mMediaPlayer.getAudioSessionId());<\/li>\n
  68. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\/\/\u00a0\u542f\u7528\u5747\u8861\u5668<\/span><\/li>\n
  69. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0mEqualizer.setEnabled(true<\/span>);<\/li>\n
  70. <\/li>\n
  71. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0TextView\u00a0eqTextView\u00a0=\u00a0new<\/span>\u00a0TextView(this<\/span>);<\/li>\n
  72. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0eqTextView.setText(\"\u5747\u6a2a\u5668:\"<\/span>);<\/li>\n
  73. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0mLinearLayout.addView(eqTextView);<\/li>\n
  74. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\/\/\u00a0\u901a\u8fc7\u5747\u8861\u5668\u5f97\u5230\u5176\u652f\u6301\u7684\u9891\u8c31\u5f15\u64ce<\/span><\/li>\n
  75. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0short<\/span>\u00a0bands\u00a0=\u00a0mEqualizer.getNumberOfBands();<\/li>\n
  76. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\/\/\u00a0getBandLevelRange\u662f\u4e00\u4e2a\u6570\u7ec4\uff0c\u8fd4\u56de\u4e00\u7ec4\u9891\u8c31\u7b49\u7ea7\u6570\u7ec4\uff0c\u8fd4\u56de\u4e00\u7ec4\u9891\u8c31\u7b49\u7ea7\u6570\u7ec4<\/span><\/li>\n
  77. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\/\/\u00a0\u7b2c\u4e00\u4e2a\u4e0b\u6807\u4e3a\u6700\u4f4e\u7684\u9650\u5ea6\u8303\u56f4\uff0c\u7b2c\u4e8c\u4e2a\u4e0b\u6807\u4e3a\u6700\u9ad8\u7684\u9650\u5ea6\u8303\u56f4<\/span><\/li>\n
  78. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\/\/\u00a0\u4f9d\u6b21\u53d6\u51fa<\/span><\/li>\n
  79. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0final<\/span>\u00a0short<\/span>\u00a0minEQLevel\u00a0=\u00a0mEqualizer.getBandLevelRange()[0<\/span>];<\/li>\n
  80. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0final<\/span>\u00a0short<\/span>\u00a0maxEQLevel\u00a0=\u00a0mEqualizer.getBandLevelRange()[1<\/span>];<\/li>\n
  81. <\/li>\n
  82. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0for<\/span>\u00a0(short<\/span>\u00a0i\u00a0=\u00a00<\/span>;\u00a0i\u00a0<\u00a0bands;\u00a0i++)\u00a0{<\/li>\n
  83. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0final<\/span>\u00a0short<\/span>\u00a0band\u00a0=\u00a0i;<\/li>\n
  84. <\/li>\n
  85. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0TextView\u00a0freqTextView\u00a0=\u00a0new<\/span>\u00a0TextView(this<\/span>);<\/li>\n
  86. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0freqTextView.setLayoutParams(new<\/span>\u00a0ViewGroup.LayoutParams(<\/li>\n
  87. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0ViewGroup.LayoutParams.FILL_PARENT,<\/li>\n
  88. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0ViewGroup.LayoutParams.WRAP_CONTENT));<\/li>\n
  89. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0freqTextView.setGravity(Gravity.CENTER_HORIZONTAL);<\/li>\n
  90. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0freqTextView.setText((mEqualizer.getCenterFreq(band)\u00a0\/\u00a01000<\/span>)\u00a0+\u00a0\"\u00a0Hz\"<\/span>);<\/li>\n
  91. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0mLinearLayout.addView(freqTextView);<\/li>\n
  92. <\/li>\n
  93. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0LinearLayout\u00a0row\u00a0=\u00a0new<\/span>\u00a0LinearLayout(this<\/span>);<\/li>\n
  94. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0row.setOrientation(LinearLayout.HORIZONTAL);<\/li>\n
  95. <\/li>\n
  96. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0TextView\u00a0minDbTextView\u00a0=\u00a0new<\/span>\u00a0TextView(this<\/span>);<\/li>\n
  97. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0minDbTextView.setLayoutParams(new<\/span>\u00a0ViewGroup.LayoutParams(<\/li>\n
  98. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0ViewGroup.LayoutParams.WRAP_CONTENT,<\/li>\n
  99. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0ViewGroup.LayoutParams.WRAP_CONTENT));<\/li>\n
  100. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0minDbTextView.setText((minEQLevel\u00a0\/\u00a0100<\/span>)\u00a0+\u00a0\"\u00a0dB\"<\/span>);<\/li>\n
  101. <\/li>\n
  102. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0TextView\u00a0maxDbTextView\u00a0=\u00a0new<\/span>\u00a0TextView(this<\/span>);<\/li>\n
  103. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0maxDbTextView.setLayoutParams(new<\/span>\u00a0ViewGroup.LayoutParams(<\/li>\n
  104. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0ViewGroup.LayoutParams.WRAP_CONTENT,<\/li>\n
  105. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0ViewGroup.LayoutParams.WRAP_CONTENT));<\/li>\n
  106. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0maxDbTextView.setText((maxEQLevel\u00a0\/\u00a0100<\/span>)\u00a0+\u00a0\"\u00a0dB\"<\/span>);<\/li>\n
  107. <\/li>\n
  108. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0LinearLayout.LayoutParams\u00a0layoutParams\u00a0=\u00a0new<\/span>\u00a0LinearLayout.LayoutParams(<\/li>\n
  109. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0ViewGroup.LayoutParams.FILL_PARENT,<\/li>\n
  110. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0ViewGroup.LayoutParams.WRAP_CONTENT);<\/li>\n
  111. <\/li>\n
  112. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0layoutParams.weight\u00a0=\u00a01<\/span>;<\/li>\n
  113. <\/li>\n
  114. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0SeekBar\u00a0bar\u00a0=\u00a0new<\/span>\u00a0SeekBar(this<\/span>);<\/li>\n
  115. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0bar.setLayoutParams(layoutParams);<\/li>\n
  116. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0bar.setMax(maxEQLevel\u00a0-\u00a0minEQLevel);<\/li>\n
  117. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0bar.setProgress(mEqualizer.getBandLevel(band));<\/li>\n
  118. <\/li>\n
  119. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0bar.setOnSeekBarChangeListener(new<\/span>\u00a0SeekBar.OnSeekBarChangeListener()\u00a0{<\/li>\n
  120. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0public<\/span>\u00a0void<\/span>\u00a0onStopTrackingTouch(SeekBar\u00a0seekBar)\u00a0{}<\/li>\n
  121. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0public<\/span>\u00a0void<\/span>\u00a0onStartTrackingTouch(SeekBar\u00a0seekBar)\u00a0{}<\/li>\n
  122. <\/li>\n
  123. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0public<\/span>\u00a0void<\/span>\u00a0onProgressChanged(SeekBar\u00a0seekBar,\u00a0int<\/span>\u00a0progress,<\/li>\n
  124. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0boolean<\/span>\u00a0fromUser)\u00a0{<\/li>\n
  125. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0mEqualizer.setBandLevel(band,\u00a0(short<\/span>)\u00a0(progress\u00a0+\u00a0minEQLevel));<\/li>\n
  126. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0}<\/li>\n
  127. <\/li>\n
  128. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0});<\/li>\n
  129. <\/li>\n
  130. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0row.addView(minDbTextView);<\/li>\n
  131. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0row.addView(bar);<\/li>\n
  132. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0row.addView(maxDbTextView);<\/li>\n
  133. <\/li>\n
  134. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0mLinearLayout.addView(row);<\/li>\n
  135. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0}<\/li>\n
  136. \u00a0\u00a0\u00a0\u00a0}<\/li>\n
  137. <\/li>\n
  138. \u00a0\u00a0\u00a0\u00a0\/**<\/span><\/li>\n
  139. \u00a0\u00a0\u00a0\u00a0\u00a0*\u00a0\u751f\u6210\u4e00\u4e2aVisualizerView\u5bf9\u8c61\uff0c\u4f7f\u97f3\u9891\u9891\u8c31\u7684\u6ce2\u6bb5\u80fd\u591f\u53cd\u6620\u5230\u00a0VisualizerView\u4e0a<\/span><\/li>\n
  140. \u00a0\u00a0\u00a0\u00a0\u00a0*\/<\/span><\/li>\n
  141. \u00a0\u00a0\u00a0\u00a0private<\/span>\u00a0void<\/span>\u00a0setupVisualizerFxAndUI()\u00a0{<\/li>\n
  142. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0mVisualizerView\u00a0=\u00a0new<\/span>\u00a0VisualizerView(this<\/span>);<\/li>\n
  143. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0mVisualizerView.setLayoutParams(new<\/span>\u00a0ViewGroup.LayoutParams(<\/li>\n
  144. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0ViewGroup.LayoutParams.FILL_PARENT,<\/li>\n
  145. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0(int<\/span>)(VISUALIZER_HEIGHT_DIP\u00a0*\u00a0getResources().getDisplayMetrics().density)));<\/li>\n
  146. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0mLinearLayout.addView(mVisualizerView);<\/li>\n
  147. <\/li>\n
  148. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0int<\/span>\u00a0sessId\u00a0=\u00a0mMediaPlayer.getAudioSessionId()\u00a0;<\/li>\n
  149. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0mVisualizer\u00a0=\u00a0new<\/span>\u00a0Visualizer(sessId);<\/li>\n
  150. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\/\/\u00a0\u53c2\u6570\u5fc5\u987b\u662f2\u7684\u4f4d\u6570<\/span><\/li>\n
  151. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0mVisualizer.setCaptureSize(Visualizer.getCaptureSizeRange()[1<\/span>]);<\/li>\n
  152. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\/\/\u00a0\u8bbe\u7f6e\u5141\u8bb8\u6ce2\u5f62\u8868\u793a\uff0c\u5e76\u4e14\u6355\u83b7\u5b83<\/span><\/li>\n
  153. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0mVisualizer.setDataCaptureListener(new<\/span>\u00a0Visualizer.OnDataCaptureListener()\u00a0{<\/li>\n
  154. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0public<\/span>\u00a0void<\/span>\u00a0onWaveFormDataCapture(Visualizer\u00a0visualizer,\u00a0byte<\/span>[]\u00a0bytes,<\/li>\n
  155. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0int<\/span>\u00a0samplingRate)\u00a0{<\/li>\n
  156. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0mVisualizerView.updateVisualizer(bytes);<\/li>\n
  157. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0}<\/li>\n
  158. <\/li>\n
  159. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0public<\/span>\u00a0void<\/span>\u00a0onFftDataCapture(Visualizer\u00a0visualizer,\u00a0byte<\/span>[]\u00a0bytes,\u00a0int<\/span>\u00a0samplingRate)\u00a0{}<\/li>\n
  160. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0},\u00a0Visualizer.getMaxCaptureRate()\u00a0\/\u00a02<\/span>,\u00a0true<\/span>,\u00a0false<\/span>);<\/li>\n
  161. \u00a0\u00a0\u00a0\u00a0}<\/li>\n
  162. <\/li>\n
  163. \u00a0\u00a0\u00a0\u00a0@Override<\/span><\/li>\n
  164. \u00a0\u00a0\u00a0\u00a0protected<\/span>\u00a0void<\/span>\u00a0onPause()\u00a0{<\/li>\n
  165. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0super<\/span>.onPause();<\/li>\n
  166. <\/li>\n
  167. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0if<\/span>\u00a0(isFinishing()\u00a0&&\u00a0mMediaPlayer\u00a0!=\u00a0null<\/span>)\u00a0{<\/li>\n
  168. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0mVisualizer.release();<\/li>\n
  169. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0mEqualizer.release();<\/li>\n
  170. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0mMediaPlayer.release();<\/li>\n
  171. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0mMediaPlayer\u00a0=\u00a0null<\/span>;<\/li>\n
  172. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0}<\/li>\n
  173. \u00a0\u00a0\u00a0\u00a0}<\/li>\n
  174. }<\/li>\n<\/ol>\n<\/div>\n

     <\/p>\n

    VisualizerView.java<\/strong><\/p>\n

    \n
    <\/div>\n
      \n
    1. package<\/span>\u00a0com.wjq.audiofx;<\/li>\n
    2. <\/li>\n
    3. \u00a0import<\/span>\u00a0android.content.Context;<\/li>\n
    4. \u00a0import<\/span>\u00a0android.graphics.Canvas;<\/li>\n
    5. \u00a0import<\/span>\u00a0android.graphics.Color;<\/li>\n
    6. \u00a0import<\/span>\u00a0android.graphics.Paint;<\/li>\n
    7. \u00a0import<\/span>\u00a0android.graphics.Rect;<\/li>\n
    8. \u00a0import<\/span>\u00a0android.view.View;<\/li>\n
    9. <\/li>\n
    10. \u00a0public<\/span>\u00a0class<\/span>\u00a0VisualizerView\u00a0extends<\/span>\u00a0View\u00a0{<\/li>\n
    11. <\/li>\n
    12. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0private<\/span>\u00a0byte<\/span>[]\u00a0mBytes;<\/li>\n
    13. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0private<\/span>\u00a0float<\/span>[]\u00a0mPoints;<\/li>\n
    14. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\/\/\u77e9\u5f62\u533a\u57df<\/span><\/li>\n
    15. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0private<\/span>\u00a0Rect\u00a0mRect\u00a0=\u00a0new<\/span>\u00a0Rect();<\/li>\n
    16. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\/\/\u00a0\u753b\u7b14<\/span><\/li>\n
    17. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0private<\/span>\u00a0Paint\u00a0mForePaint\u00a0=\u00a0new<\/span>\u00a0Paint();<\/li>\n
    18. <\/li>\n
    19. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\/\/\u00a0\u521d\u59cb\u5316\u753b\u7b14<\/span><\/li>\n
    20. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0private<\/span>\u00a0void<\/span>\u00a0init()\u00a0{<\/li>\n
    21. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0mBytes\u00a0=\u00a0null<\/span>;<\/li>\n
    22. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0mForePaint.setStrokeWidth(1f);<\/li>\n
    23. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0mForePaint.setAntiAlias(true<\/span>);<\/li>\n
    24. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0mForePaint.setColor(Color.GREEN);<\/li>\n
    25. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0}<\/li>\n
    26. <\/li>\n
    27. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0public<\/span>\u00a0VisualizerView(Context\u00a0context)\u00a0{<\/li>\n
    28. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0super<\/span>(context);<\/li>\n
    29. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0init();<\/li>\n
    30. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0}<\/li>\n
    31. <\/li>\n
    32. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0public<\/span>\u00a0void<\/span>\u00a0updateVisualizer(byte<\/span>[]\u00a0bytes)\u00a0{<\/li>\n
    33. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0mBytes\u00a0=\u00a0bytes;<\/li>\n
    34. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0invalidate();<\/li>\n
    35. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0}<\/li>\n
    36. <\/li>\n
    37. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0@Override<\/span><\/li>\n
    38. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0protected<\/span>\u00a0void<\/span>\u00a0onDraw(Canvas\u00a0canvas)\u00a0{<\/li>\n
    39. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0super<\/span>.onDraw(canvas);<\/li>\n
    40. <\/li>\n
    41. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0if<\/span>\u00a0(mBytes\u00a0==\u00a0null<\/span>)\u00a0{<\/li>\n
    42. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0return<\/span>;<\/li>\n
    43. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0}<\/li>\n
    44. <\/li>\n
    45. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0if<\/span>\u00a0(mPoints\u00a0==\u00a0null<\/span>\u00a0||\u00a0mPoints.length\u00a0<\u00a0mBytes.length\u00a0*\u00a04<\/span>)\u00a0{<\/li>\n
    46. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0mPoints\u00a0=\u00a0new<\/span>\u00a0float<\/span>[mBytes.length\u00a0*\u00a04<\/span>];<\/li>\n
    47. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0}<\/li>\n
    48. <\/li>\n
    49. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0mRect.set(0<\/span>,\u00a00<\/span>,\u00a0getWidth(),\u00a0getHeight());<\/li>\n
    50. <\/li>\n
    51. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0for<\/span>\u00a0(int<\/span>\u00a0i\u00a0=\u00a00<\/span>;\u00a0i\u00a0<\u00a0mBytes.length\u00a0-\u00a01<\/span>;\u00a0i++)\u00a0{<\/li>\n
    52. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0mPoints[i\u00a0*\u00a04<\/span>]\u00a0=\u00a0mRect.width()\u00a0*\u00a0i\u00a0\/\u00a0(mBytes.length\u00a0-\u00a01<\/span>);<\/li>\n
    53. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0mPoints[i\u00a0*\u00a04<\/span>\u00a0+\u00a01<\/span>]\u00a0=\u00a0mRect.height()\u00a0\/\u00a02<\/span><\/li>\n
    54. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0+\u00a0((byte<\/span>)\u00a0(mBytes[i]\u00a0+\u00a0128<\/span>))\u00a0*\u00a0(mRect.height()\u00a0\/\u00a02<\/span>)\u00a0\/\u00a0128<\/span>;<\/li>\n
    55. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0mPoints[i\u00a0*\u00a04<\/span>\u00a0+\u00a02<\/span>]\u00a0=\u00a0mRect.width()\u00a0*\u00a0(i\u00a0+\u00a01<\/span>)\u00a0\/\u00a0(mBytes.length\u00a0-\u00a01<\/span>);<\/li>\n
    56. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0mPoints[i\u00a0*\u00a04<\/span>\u00a0+\u00a03<\/span>]\u00a0=\u00a0mRect.height()\u00a0\/\u00a02<\/span><\/li>\n
    57. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0+\u00a0((byte<\/span>)\u00a0(mBytes[i\u00a0+\u00a01<\/span>]\u00a0+\u00a0128<\/span>))\u00a0*\u00a0(mRect.height()\u00a0\/\u00a02<\/span>)\u00a0\/\u00a0128<\/span>;<\/li>\n
    58. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0}<\/li>\n
    59. <\/li>\n
    60. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0canvas.drawLines(mPoints,\u00a0mForePaint);<\/li>\n
    61. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0}<\/li>\n
    62. <\/li>\n
    63. \u00a0}<\/li>\n<\/ol>\n<\/div>\n

       <\/p>\n","protected":false},"excerpt":{"rendered":"

      Android\u5b9e\u73b0\u64ad\u653e\u97f3\u9891\u65f6\u7684\u8df3\u52a8\u9891\u8c31\uff0c\u5e76\u5b9e\u73b0\u53ef\u4ee5\u8c03\u8282\u7684\u5747\u8861\u5668\u3002 Main.java package\u00a0com. […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[108],"tags":[599,109,111],"class_list":["post-301","post","type-post","status-publish","format-standard","hentry","category-android","tag-android","tag-demo","tag-111"],"_links":{"self":[{"href":"http:\/\/www.menglanglang.cn\/index.php?rest_route=\/wp\/v2\/posts\/301","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/www.menglanglang.cn\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.menglanglang.cn\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.menglanglang.cn\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.menglanglang.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=301"}],"version-history":[{"count":0,"href":"http:\/\/www.menglanglang.cn\/index.php?rest_route=\/wp\/v2\/posts\/301\/revisions"}],"wp:attachment":[{"href":"http:\/\/www.menglanglang.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=301"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.menglanglang.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=301"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.menglanglang.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=301"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}