android 仿微信聊天界面，以及语音录制功能

我会带着你远行 2022-06-14 00:06 759阅读 0赞

本例为模仿微信聊天界面UI设计，文字发送以及语言录制UI。

1先看效果图：

![fff094d7-e27e-3a94-90e1-f8ee90452174.png][]

![dfbeaff7-48e3-32f1-8d47-497e093ff7c2.png][]  
  
![71ef5d26-5c2c-3100-a1cc-9911eee2c51e.png][]  
  
![f0a97fb3-bea4-38b0-a284-30314c6e9334.png][]  
  
![ba22812e-8a52-3fb8-a79c-844ca0d88f02.png][]

第一:chat.xml设计

Xml代码 ![收藏代码][icon_star.png]

1.  **<?****xml** version="1.0" encoding="utf-8"**?>**
2.  **<****RelativeLayout** xmlns:android="http://schemas.android.com/apk/res/android"
3.  android:layout\_width="fill\_parent"
4.  android:layout\_height="fill\_parent"
5.  android:background="@drawable/chat\_bg\_default" **>**
6.  
7.  
8.  **<****RelativeLayout**
9.  android:id="@+id/rl\_layout"
10. android:layout\_width="fill\_parent"
11. android:layout\_height="45dp"
12. android:background="@drawable/title\_bar"
13. android:gravity="center\_vertical" **>**
14. 
15. **<****Button**
16. android:id="@+id/btn\_back"
17. android:layout\_width="70dp"
18. android:layout\_height="wrap\_content"
19. android:layout\_centerVertical="true"
20. android:background="@drawable/title\_btn\_back"
21. android:onClick="chat\_back"
22. android:text="返回"
23. android:textColor="\#fff"
24. android:textSize="14sp" **/>**
25. 
26. **<****TextView**
27. android:layout\_width="wrap\_content"
28. android:layout\_height="wrap\_content"
29. android:layout\_centerInParent="true"
30. android:text="白富美"
31. android:textColor="\#ffffff"
32. android:textSize="20sp" **/>**
33. 
34. **<****ImageButton**
35. android:id="@+id/right\_btn"
36. android:layout\_width="67dp"
37. android:layout\_height="wrap\_content"
38. android:layout\_alignParentRight="true"
39. android:layout\_centerVertical="true"
40. android:layout\_marginRight="5dp"
41. android:background="@drawable/title\_btn\_right"
42. android:src="@drawable/mm\_title\_btn\_contact\_normal" **/>**
43. **</****RelativeLayout****>**
44. 
45. 
46. **<****RelativeLayout**
47. android:id="@+id/rl\_bottom"
48. android:layout\_width="fill\_parent"
49. android:layout\_height="wrap\_content"
50. android:layout\_alignParentBottom="true"
51. android:background="@drawable/chat\_footer\_bg" **>**
52. 
53. **<****ImageView**
54. android:id="@+id/ivPopUp"
55. android:layout\_width="wrap\_content"
56. android:layout\_height="wrap\_content"
57. android:layout\_alignParentLeft="true"
58. android:layout\_centerVertical="true"
59. android:layout\_marginLeft="10dip"
60. android:src="@drawable/chatting\_setmode\_msg\_btn" **/>**
61. 
62. **<****RelativeLayout**
63. android:id="@+id/btn\_bottom"
64. android:layout\_width="fill\_parent"
65. android:layout\_height="wrap\_content"
66. android:layout\_alignParentRight="true"
67. android:layout\_centerVertical="true"
68. android:layout\_toRightOf="@+id/ivPopUp" **>**
69. 
70. **<****Button**
71. android:id="@+id/btn\_send"
72. android:layout\_width="60dp"
73. android:layout\_height="40dp"
74. android:layout\_alignParentRight="true"
75. android:layout\_centerVertical="true"
76. android:layout\_marginRight="10dp"
77. android:background="@drawable/chat\_send\_btn"
78. android:text="发送" **/>**
79. 
80. **<****EditText**
81. android:id="@+id/et\_sendmessage"
82. android:layout\_width="fill\_parent"
83. android:layout\_height="40dp"
84. android:layout\_centerVertical="true"
85. android:layout\_marginLeft="10dp"
86. android:layout\_marginRight="10dp"
87. android:layout\_toLeftOf="@id/btn\_send"
88. android:background="@drawable/login\_edit\_normal"
89. android:singleLine="true"
90. android:textSize="18sp" **/>**
91. **</****RelativeLayout****>**
92. 
93. **<****TextView**
94. android:id="@+id/btn\_rcd"
95. android:layout\_width="fill\_parent"
96. android:layout\_height="40dp"
97. android:layout\_alignParentRight="true"
98. android:layout\_centerVertical="true"
99. android:layout\_marginLeft="10dp"
100. android:layout\_marginRight="10dp"
101. android:layout\_toRightOf="@+id/ivPopUp"
102. android:background="@drawable/chat\_send\_btn"
103. android:gravity="center"
104. android:text="按住说话"
105. android:visibility="gone" **/>**
106. **</****RelativeLayout****>**
107. 
108. 
109. **<****ListView**
110. android:id="@+id/listview"
111. android:layout\_width="fill\_parent"
112. android:layout\_height="fill\_parent"
113. android:layout\_above="@id/rl\_bottom"
114. android:layout\_below="@id/rl\_layout"
115. android:cacheColorHint="\#0000"
116. android:divider="@null"
117. android:dividerHeight="5dp"
118. android:scrollbarStyle="outsideOverlay"
119. android:stackFromBottom="true" **/>**
120. 
121. 
122. **<****LinearLayout**
123. android:id="@+id/rcChat\_popup"
124. android:layout\_width="fill\_parent"
125. android:layout\_height="fill\_parent"
126. android:gravity="center"
127. android:visibility="gone" **>**
128. 
129. **<****include**
130. android:layout\_width="wrap\_content"
131. android:layout\_height="wrap\_content"
132. android:layout\_gravity="center"
133. layout="@layout/voice\_rcd\_hint\_window" **/>**
134. **</****LinearLayout****>**
135. 
136. **</****RelativeLayout****>**

第二：语音录制类封装SoundMeter.java

Java代码 ![收藏代码][icon_star.png]

1.  **package** com.example.voice\_rcd; 
2.  
3.  **import** java.io.IOException; 
4.  
5.  **import** android.media.MediaRecorder; 
6.  **import** android.os.Environment; 
7.  
8.  **public** **class** SoundMeter \{ 
9.  **static** **final** **private** **double** EMA\_FILTER = 0.6; 
10. 
11. **private** MediaRecorder mRecorder = **null**; 
12. **private** **double** mEMA = 0.0; 
13. 
14. **public** **void** start(String name) \{ 
15. **if** (!Environment.getExternalStorageState().equals( 
16.  android.os.Environment.MEDIA\_MOUNTED)) \{ 
17. **return**; 
18.  \} 
19. **if** (mRecorder == **null**) \{ 
20.  mRecorder = **new** MediaRecorder(); 
21.  mRecorder.setAudioSource(MediaRecorder.AudioSource.MIC); 
22.  mRecorder.setOutputFormat(MediaRecorder.OutputFormat.THREE\_GPP); 
23.  mRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR\_NB); 
24.  mRecorder.setOutputFile(android.os.Environment.getExternalStorageDirectory()+"/"\+name); 
25. **try** \{ 
26.  mRecorder.prepare(); 
27.  mRecorder.start(); 
28. 
29.  mEMA = 0.0; 
30.  \} **catch** (IllegalStateException e) \{ 
31.  System.out.print(e.getMessage()); 
32.  \} **catch** (IOException e) \{ 
33.  System.out.print(e.getMessage()); 
34.  \} 
35. 
36.  \} 
37.  \} 
38. 
39. **public** **void** stop() \{ 
40. **if** (mRecorder != **null**) \{ 
41.  mRecorder.stop(); 
42.  mRecorder.release(); 
43.  mRecorder = **null**; 
44.  \} 
45.  \} 
46. 
47. **public** **void** pause() \{ 
48. **if** (mRecorder != **null**) \{ 
49.  mRecorder.stop(); 
50.  \} 
51.  \} 
52. 
53. **public** **void** start() \{ 
54. **if** (mRecorder != **null**) \{ 
55.  mRecorder.start(); 
56.  \} 
57.  \} 
58. 
59. **public** **double** getAmplitude() \{ 
60. **if** (mRecorder != **null**) 
61. **return** (mRecorder.getMaxAmplitude() / 2700.0); 
62. **else**
63. **return** 0; 
64. 
65.  \} 
66. 
67. **public** **double** getAmplitudeEMA() \{ 
68. **double** amp = getAmplitude(); 
69.  mEMA = EMA\_FILTER \* amp + (1.0 \- EMA\_FILTER) \* mEMA; 
70. **return** mEMA; 
71.  \} 
72. \}

第三：主界面Activity源码，没写太多解释，相对比较简单的自己研究下：

Java代码 ![收藏代码][icon_star.png]

1.  **package** com.example.voice\_rcd; 
2.  
3.  **import** java.io.File; 
4.  **import** java.util.ArrayList; 
5.  **import** java.util.Calendar; 
6.  **import** java.util.List; 
7.  
8.  **import** android.app.Activity; 
9.  **import** android.os.Bundle; 
10. **import** android.os.Environment; 
11. **import** android.os.Handler; 
12. **import** android.os.SystemClock; 
13. **import** android.view.MotionEvent; 
14. **import** android.view.View; 
15. **import** android.view.View.OnClickListener; 
16. **import** android.view.View.OnTouchListener; 
17. **import** android.view.WindowManager; 
18. **import** android.view.animation.Animation; 
19. **import** android.view.animation.AnimationUtils; 
20. **import** android.widget.Button; 
21. **import** android.widget.EditText; 
22. **import** android.widget.ImageView; 
23. **import** android.widget.LinearLayout; 
24. **import** android.widget.ListView; 
25. **import** android.widget.RelativeLayout; 
26. **import** android.widget.TextView; 
27. **import** android.widget.Toast; 
28. 
29. **public** **class** MainActivity **extends** Activity **implements** OnClickListener \{ 
30. /\*\* Called when the activity is first created. \*/
31. 
32. **private** Button mBtnSend; 
33. **private** TextView mBtnRcd; 
34. **private** Button mBtnBack; 
35. **private** EditText mEditTextContent; 
36. **private** RelativeLayout mBottom; 
37. **private** ListView mListView; 
38. **private** ChatMsgViewAdapter mAdapter; 
39. **private** List<ChatMsgEntity> mDataArrays = **new** ArrayList<ChatMsgEntity>(); 
40. **private** **boolean** isShosrt = **false**; 
41. **private** LinearLayout voice\_rcd\_hint\_loading, voice\_rcd\_hint\_rcding, 
42.  voice\_rcd\_hint\_tooshort; 
43. **private** ImageView img1, sc\_img1; 
44. **private** SoundMeter mSensor; 
45. **private** View rcChat\_popup; 
46. **private** LinearLayout del\_re; 
47. **private** ImageView chatting\_mode\_btn, volume; 
48. **private** **boolean** btn\_vocie = **false**; 
49. **private** **int** flag = 1; 
50. **private** Handler mHandler = **new** Handler(); 
51. **private** String voiceName; 
52. **private** **long** startVoiceT, endVoiceT; 
53. 
54. **public** **void** onCreate(Bundle savedInstanceState) \{ 
55. **super**.onCreate(savedInstanceState); 
56.  setContentView(R.layout.chat); 
57. // 启动activity时不自动弹出软键盘
58.  getWindow().setSoftInputMode( 
59.  WindowManager.LayoutParams.SOFT\_INPUT\_STATE\_ALWAYS\_HIDDEN); 
60.  initView(); 
61. 
62.  initData(); 
63.  \} 
64. 
65. **public** **void** initView() \{ 
66.  mListView = (ListView) findViewById(R.id.listview); 
67.  mBtnSend = (Button) findViewById(R.id.btn\_send); 
68.  mBtnRcd = (TextView) findViewById(R.id.btn\_rcd); 
69.  mBtnSend.setOnClickListener(**this**); 
70.  mBtnBack = (Button) findViewById(R.id.btn\_back); 
71.  mBottom = (RelativeLayout) findViewById(R.id.btn\_bottom); 
72.  mBtnBack.setOnClickListener(**this**); 
73.  chatting\_mode\_btn = (ImageView) **this**.findViewById(R.id.ivPopUp); 
74.  volume = (ImageView) **this**.findViewById(R.id.volume); 
75.  rcChat\_popup = **this**.findViewById(R.id.rcChat\_popup); 
76.  img1 = (ImageView) **this**.findViewById(R.id.img1); 
77.  sc\_img1 = (ImageView) **this**.findViewById(R.id.sc\_img1); 
78.  del\_re = (LinearLayout) **this**.findViewById(R.id.del\_re); 
79.  voice\_rcd\_hint\_rcding = (LinearLayout) **this**
80.  .findViewById(R.id.voice\_rcd\_hint\_rcding); 
81.  voice\_rcd\_hint\_loading = (LinearLayout) **this**
82.  .findViewById(R.id.voice\_rcd\_hint\_loading); 
83.  voice\_rcd\_hint\_tooshort = (LinearLayout) **this**
84.  .findViewById(R.id.voice\_rcd\_hint\_tooshort); 
85.  mSensor = **new** SoundMeter(); 
86.  mEditTextContent = (EditText) findViewById(R.id.et\_sendmessage); 
87. 
88. //语音文字切换按钮
89.  chatting\_mode\_btn.setOnClickListener(**new** OnClickListener() \{ 
90. 
91. **public** **void** onClick(View v) \{ 
92. 
93. **if** (btn\_vocie) \{ 
94.  mBtnRcd.setVisibility(View.GONE); 
95.  mBottom.setVisibility(View.VISIBLE); 
96.  btn\_vocie = **false**; 
97.  chatting\_mode\_btn 
98.  .setImageResource(R.drawable.chatting\_setmode\_msg\_btn); 
99. 
100.  \} **else** \{ 
101.  mBtnRcd.setVisibility(View.VISIBLE); 
102.  mBottom.setVisibility(View.GONE); 
103.  chatting\_mode\_btn 
104.  .setImageResource(R.drawable.chatting\_setmode\_voice\_btn); 
105.  btn\_vocie = **true**; 
106.  \} 
107.  \} 
108.  \}); 
109.  mBtnRcd.setOnTouchListener(**new** OnTouchListener() \{ 
110. 
111. **public** **boolean** onTouch(View v, MotionEvent event) \{ 
112. //按下语音录制按钮时返回false执行父类OnTouch
113. **return** **false**; 
114.  \} 
115.  \}); 
116.  \} 
117. 
118. **private** String\[\] msgArray = **new** String\[\] \{ "有人就有恩怨","有恩怨就有江湖","人就是江湖","你怎么退出？ ","生命中充满了巧合","两条平行线也会有相交的一天。"\}; 
119. 
120. **private** String\[\] dataArray = **new** String\[\] \{ "2012-10-31 18:00", 
121. "2012-10-31 18:10", "2012-10-31 18:11", "2012-10-31 18:20", 
122. "2012-10-31 18:30", "2012-10-31 18:35"\}; 
123. **private** **final** **static** **int** COUNT = 6; 
124. 
125. **public** **void** initData() \{ 
126. **for** (**int** i = 0; i < COUNT; i++) \{ 
127.  ChatMsgEntity entity = **new** ChatMsgEntity(); 
128.  entity.setDate(dataArray\[i\]); 
129. **if** (i % 2 == 0) \{ 
130.  entity.setName("白富美"); 
131.  entity.setMsgType(**true**); 
132.  \} **else** \{ 
133.  entity.setName("高富帅"); 
134.  entity.setMsgType(**false**); 
135.  \} 
136. 
137.  entity.setText(msgArray\[i\]); 
138.  mDataArrays.add(entity); 
139.  \} 
140. 
141.  mAdapter = **new** ChatMsgViewAdapter(**this**, mDataArrays); 
142.  mListView.setAdapter(mAdapter); 
143. 
144.  \} 
145. 
146. **public** **void** onClick(View v) \{ 
147. // TODO Auto-generated method stub
148. **switch** (v.getId()) \{ 
149. **case** R.id.btn\_send: 
150.  send(); 
151. **break**; 
152. **case** R.id.btn\_back: 
153.  finish(); 
154. **break**; 
155.  \} 
156.  \} 
157. 
158. **private** **void** send() \{ 
159.  String contString = mEditTextContent.getText().toString(); 
160. **if** (contString.length() > 0) \{ 
161.  ChatMsgEntity entity = **new** ChatMsgEntity(); 
162.  entity.setDate(getDate()); 
163.  entity.setName("高富帅"); 
164.  entity.setMsgType(**false**); 
165.  entity.setText(contString); 
166. 
167.  mDataArrays.add(entity); 
168.  mAdapter.notifyDataSetChanged(); 
169. 
170.  mEditTextContent.setText(""); 
171. 
172.  mListView.setSelection(mListView.getCount() - 1); 
173.  \} 
174.  \} 
175. 
176. **private** String getDate() \{ 
177.  Calendar c = Calendar.getInstance(); 
178. 
179.  String year = String.valueOf(c.get(Calendar.YEAR)); 
180.  String month = String.valueOf(c.get(Calendar.MONTH)); 
181.  String day = String.valueOf(c.get(Calendar.DAY\_OF\_MONTH) + 1); 
182.  String hour = String.valueOf(c.get(Calendar.HOUR\_OF\_DAY)); 
183.  String mins = String.valueOf(c.get(Calendar.MINUTE)); 
184. 
185.  StringBuffer sbBuffer = **new** StringBuffer(); 
186.  sbBuffer.append(year + "-" \+ month + "-" \+ day + " " \+ hour + ":"
187.  \+ mins); 
188. 
189. **return** sbBuffer.toString(); 
190.  \} 
191. 
192. //按下语音录制按钮时
193. @Override
194. **public** **boolean** onTouchEvent(MotionEvent event) \{ 
195. 
196. **if** (!Environment.getExternalStorageDirectory().exists()) \{ 
197.  Toast.makeText(**this**, "No SDCard", Toast.LENGTH\_LONG).show(); 
198. **return** **false**; 
199.  \} 
200. 
201. **if** (btn\_vocie) \{ 
202.  System.out.println("1"); 
203. **int**\[\] location = **new** **int**\[2\]; 
204.  mBtnRcd.getLocationInWindow(location); // 获取在当前窗口内的绝对坐标
205. **int** btn\_rc\_Y = location\[1\]; 
206. **int** btn\_rc\_X = location\[0\]; 
207. **int**\[\] del\_location = **new** **int**\[2\]; 
208.  del\_re.getLocationInWindow(del\_location); 
209. **int** del\_Y = del\_location\[1\]; 
210. **int** del\_x = del\_location\[0\]; 
211. **if** (event.getAction() == MotionEvent.ACTION\_DOWN && flag == 1) \{ 
212. **if** (!Environment.getExternalStorageDirectory().exists()) \{ 
213.  Toast.makeText(**this**, "No SDCard", Toast.LENGTH\_LONG).show(); 
214. **return** **false**; 
215.  \} 
216.  System.out.println("2"); 
217. **if** (event.getY() > btn\_rc\_Y && event.getX() > btn\_rc\_X) \{ //判断手势按下的位置是否是语音录制按钮的范围内
218.  System.out.println("3"); 
219.  mBtnRcd.setBackgroundResource(R.drawable.voice\_rcd\_btn\_pressed); 
220.  rcChat\_popup.setVisibility(View.VISIBLE); 
221.  voice\_rcd\_hint\_loading.setVisibility(View.VISIBLE); 
222.  voice\_rcd\_hint\_rcding.setVisibility(View.GONE); 
223.  voice\_rcd\_hint\_tooshort.setVisibility(View.GONE); 
224.  mHandler.postDelayed(**new** Runnable() \{ 
225. **public** **void** run() \{ 
226. **if** (!isShosrt) \{ 
227.  voice\_rcd\_hint\_loading.setVisibility(View.GONE); 
228.  voice\_rcd\_hint\_rcding 
229.  .setVisibility(View.VISIBLE); 
230.  \} 
231.  \} 
232.  \}, 300); 
233.  img1.setVisibility(View.VISIBLE); 
234.  del\_re.setVisibility(View.GONE); 
235.  startVoiceT = SystemClock.currentThreadTimeMillis(); 
236.  voiceName = startVoiceT + ".amr"; 
237.  start(voiceName); 
238.  flag = 2; 
239.  \} 
240.  \} **else** **if** (event.getAction() == MotionEvent.ACTION\_UP && flag == 2) \{ //松开手势时执行录制完成
241.  System.out.println("4"); 
242.  mBtnRcd.setBackgroundResource(R.drawable.voice\_rcd\_btn\_nor); 
243. **if** (event.getY() >= del\_Y 
244.  && event.getY() <= del\_Y + del\_re.getHeight() 
245.  && event.getX() >= del\_x 
246.  && event.getX() <= del\_x + del\_re.getWidth()) \{ 
247.  rcChat\_popup.setVisibility(View.GONE); 
248.  img1.setVisibility(View.VISIBLE); 
249.  del\_re.setVisibility(View.GONE); 
250.  stop(); 
251.  flag = 1; 
252.  File file = **new** File(android.os.Environment.getExternalStorageDirectory()+"/"
253.  \+ voiceName); 
254. **if** (file.exists()) \{ 
255.  file.delete(); 
256.  \} 
257.  \} **else** \{ 
258. 
259.  voice\_rcd\_hint\_rcding.setVisibility(View.GONE); 
260.  stop(); 
261.  endVoiceT = SystemClock.currentThreadTimeMillis(); 
262.  flag = 1; 
263. **int** time = (**int**) ((endVoiceT - startVoiceT) / 1000); 
264. **if** (time < 1) \{ 
265.  isShosrt = **true**; 
266.  voice\_rcd\_hint\_loading.setVisibility(View.GONE); 
267.  voice\_rcd\_hint\_rcding.setVisibility(View.GONE); 
268.  voice\_rcd\_hint\_tooshort.setVisibility(View.VISIBLE); 
269.  mHandler.postDelayed(**new** Runnable() \{ 
270. **public** **void** run() \{ 
271.  voice\_rcd\_hint\_tooshort 
272.  .setVisibility(View.GONE); 
273.  rcChat\_popup.setVisibility(View.GONE); 
274.  isShosrt = **false**; 
275.  \} 
276.  \}, 500); 
277. **return** **false**; 
278.  \} 
279.  ChatMsgEntity entity = **new** ChatMsgEntity(); 
280.  entity.setDate(getDate()); 
281.  entity.setName("高富帅"); 
282.  entity.setMsgType(**false**); 
283.  entity.setTime(time+"\\""); 
284.  entity.setText(voiceName); 
285.  mDataArrays.add(entity); 
286.  mAdapter.notifyDataSetChanged(); 
287.  mListView.setSelection(mListView.getCount() - 1); 
288.  rcChat\_popup.setVisibility(View.GONE); 
289. 
290.  \} 
291.  \} 
292. **if** (event.getY() < btn\_rc\_Y) \{ //手势按下的位置不在语音录制按钮的范围内
293.  System.out.println("5"); 
294.  Animation mLitteAnimation = AnimationUtils.loadAnimation(**this**, 
295.  R.anim.cancel\_rc); 
296.  Animation mBigAnimation = AnimationUtils.loadAnimation(**this**, 
297.  R.anim.cancel\_rc2); 
298.  img1.setVisibility(View.GONE); 
299.  del\_re.setVisibility(View.VISIBLE); 
300.  del\_re.setBackgroundResource(R.drawable.voice\_rcd\_cancel\_bg); 
301. **if** (event.getY() >= del\_Y 
302.  && event.getY() <= del\_Y + del\_re.getHeight() 
303.  && event.getX() >= del\_x 
304.  && event.getX() <= del\_x + del\_re.getWidth()) \{ 
305.  del\_re.setBackgroundResource(R.drawable.voice\_rcd\_cancel\_bg\_focused); 
306.  sc\_img1.startAnimation(mLitteAnimation); 
307.  sc\_img1.startAnimation(mBigAnimation); 
308.  \} 
309.  \} **else** \{ 
310. 
311.  img1.setVisibility(View.VISIBLE); 
312.  del\_re.setVisibility(View.GONE); 
313.  del\_re.setBackgroundResource(0); 
314.  \} 
315.  \} 
316. **return** **super**.onTouchEvent(event); 
317.  \} 
318. 
319. **private** **static** **final** **int** POLL\_INTERVAL = 300; 
320. 
321. **private** Runnable mSleepTask = **new** Runnable() \{ 
322. **public** **void** run() \{ 
323.  stop(); 
324.  \} 
325.  \}; 
326. **private** Runnable mPollTask = **new** Runnable() \{ 
327. **public** **void** run() \{ 
328. **double** amp = mSensor.getAmplitude(); 
329.  updateDisplay(amp); 
330.  mHandler.postDelayed(mPollTask, POLL\_INTERVAL); 
331. 
332.  \} 
333.  \}; 
334. 
335. **private** **void** start(String name) \{ 
336.  mSensor.start(name); 
337.  mHandler.postDelayed(mPollTask, POLL\_INTERVAL); 
338.  \} 
339. 
340. **private** **void** stop() \{ 
341.  mHandler.removeCallbacks(mSleepTask); 
342.  mHandler.removeCallbacks(mPollTask); 
343.  mSensor.stop(); 
344.  volume.setImageResource(R.drawable.amp1); 
345.  \} 
346. 
347. **private** **void** updateDisplay(**double** signalEMA) \{ 
348. 
349. **switch** ((**int**) signalEMA) \{ 
350. **case** 0: 
351. **case** 1: 
352.  volume.setImageResource(R.drawable.amp1); 
353. **break**; 
354. **case** 2: 
355. **case** 3: 
356.  volume.setImageResource(R.drawable.amp2); 
357. 
358. **break**; 
359. **case** 4: 
360. **case** 5: 
361.  volume.setImageResource(R.drawable.amp3); 
362. **break**; 
363. **case** 6: 
364. **case** 7: 
365.  volume.setImageResource(R.drawable.amp4); 
366. **break**; 
367. **case** 8: 
368. **case** 9: 
369.  volume.setImageResource(R.drawable.amp5); 
370. **break**; 
371. **case** 10: 
372. **case** 11: 
373.  volume.setImageResource(R.drawable.amp6); 
374. **break**; 
375. **default**: 
376.  volume.setImageResource(R.drawable.amp7); 
377. **break**; 
378.  \} 
379.  \} 
380. 
381. **public** **void** head\_xiaohei(View v) \{ // 标题栏 返回按钮
382. 
383.  \} 
384. \}

第四：自定义的显示适配器：

Java代码 ![收藏代码][icon_star.png]

1.  **package** com.example.voice\_rcd; 
2.  
3.  **import** java.util.List; 
4.  
5.  **import** android.content.Context; 
6.  **import** android.media.MediaPlayer; 
7.  **import** android.media.MediaPlayer.OnCompletionListener; 
8.  **import** android.view.LayoutInflater; 
9.  **import** android.view.View; 
10. **import** android.view.View.OnClickListener; 
11. **import** android.view.ViewGroup; 
12. **import** android.widget.BaseAdapter; 
13. **import** android.widget.TextView; 
14. 
15. **public** **class** ChatMsgViewAdapter **extends** BaseAdapter \{ 
16. 
17. **public** **static** **interface** IMsgViewType \{ 
18. **int** IMVT\_COM\_MSG = 0; 
19. **int** IMVT\_TO\_MSG = 1; 
20.  \} 
21. 
22. **private** **static** **final** String TAG = ChatMsgViewAdapter.**class**.getSimpleName(); 
23. 
24. **private** List<ChatMsgEntity> coll; 
25. 
26. **private** Context ctx; 
27. 
28. **private** LayoutInflater mInflater; 
29. **private** MediaPlayer mMediaPlayer = **new** MediaPlayer(); 
30. 
31. **public** ChatMsgViewAdapter(Context context, List<ChatMsgEntity> coll) \{ 
32.  ctx = context; 
33. **this**.coll = coll; 
34.  mInflater = LayoutInflater.from(context); 
35.  \} 
36. 
37. **public** **int** getCount() \{ 
38. **return** coll.size(); 
39.  \} 
40. 
41. **public** Object getItem(**int** position) \{ 
42. **return** coll.get(position); 
43.  \} 
44. 
45. **public** **long** getItemId(**int** position) \{ 
46. **return** position; 
47.  \} 
48. 
49. **public** **int** getItemViewType(**int** position) \{ 
50. // TODO Auto-generated method stub
51.  ChatMsgEntity entity = coll.get(position); 
52. 
53. **if** (entity.getMsgType()) \{ 
54. **return** IMsgViewType.IMVT\_COM\_MSG; 
55.  \} **else** \{ 
56. **return** IMsgViewType.IMVT\_TO\_MSG; 
57.  \} 
58. 
59.  \} 
60. 
61. **public** **int** getViewTypeCount() \{ 
62. // TODO Auto-generated method stub
63. **return** 2; 
64.  \} 
65. 
66. **public** View getView(**int** position, View convertView, ViewGroup parent) \{ 
67. 
68. **final** ChatMsgEntity entity = coll.get(position); 
69. **boolean** isComMsg = entity.getMsgType(); 
70. 
71.  ViewHolder viewHolder = **null**; 
72. **if** (convertView == **null**) \{ 
73. **if** (isComMsg) \{ 
74.  convertView = mInflater.inflate( 
75.  R.layout.chatting\_item\_msg\_text\_left, **null**); 
76.  \} **else** \{ 
77.  convertView = mInflater.inflate( 
78.  R.layout.chatting\_item\_msg\_text\_right, **null**); 
79.  \} 
80. 
81.  viewHolder = **new** ViewHolder(); 
82.  viewHolder.tvSendTime = (TextView) convertView 
83.  .findViewById(R.id.tv\_sendtime); 
84.  viewHolder.tvUserName = (TextView) convertView 
85.  .findViewById(R.id.tv\_username); 
86.  viewHolder.tvContent = (TextView) convertView 
87.  .findViewById(R.id.tv\_chatcontent); 
88.  viewHolder.tvTime = (TextView) convertView 
89.  .findViewById(R.id.tv\_time); 
90.  viewHolder.isComMsg = isComMsg; 
91. 
92.  convertView.setTag(viewHolder); 
93.  \} **else** \{ 
94.  viewHolder = (ViewHolder) convertView.getTag(); 
95.  \} 
96. 
97.  viewHolder.tvSendTime.setText(entity.getDate()); 
98. 
99. **if** (entity.getText().contains(".amr")) \{ 
100.  viewHolder.tvContent.setText(""); 
101.  viewHolder.tvContent.setCompoundDrawablesWithIntrinsicBounds(0, 0, R.drawable.chatto\_voice\_playing, 0); 
102.  viewHolder.tvTime.setText(entity.getTime()); 
103.  \} **else** \{ 
104.  viewHolder.tvContent.setText(entity.getText()); 
105.  viewHolder.tvContent.setCompoundDrawablesWithIntrinsicBounds(0, 0, 0, 0); 
106.  viewHolder.tvTime.setText(""); 
107.  \} 
108.  viewHolder.tvContent.setOnClickListener(**new** OnClickListener() \{ 
109. 
110. **public** **void** onClick(View v) \{ 
111. **if** (entity.getText().contains(".amr")) \{ 
112.  playMusic(android.os.Environment.getExternalStorageDirectory()+"/"\+entity.getText()) ; 
113.  \} 
114.  \} 
115.  \}); 
116.  viewHolder.tvUserName.setText(entity.getName()); 
117. 
118. **return** convertView; 
119.  \} 
120. 
121. **static** **class** ViewHolder \{ 
122. **public** TextView tvSendTime; 
123. **public** TextView tvUserName; 
124. **public** TextView tvContent; 
125. **public** TextView tvTime; 
126. **public** **boolean** isComMsg = **true**; 
127.  \} 
128. 
129. /\*\*
130.  \* @Description
131.  \* @param name
132.  \*/
133. **private** **void** playMusic(String name) \{ 
134. **try** \{ 
135. **if** (mMediaPlayer.isPlaying()) \{ 
136.  mMediaPlayer.stop(); 
137.  \} 
138.  mMediaPlayer.reset(); 
139.  mMediaPlayer.setDataSource(name); 
140.  mMediaPlayer.prepare(); 
141.  mMediaPlayer.start(); 
142.  mMediaPlayer.setOnCompletionListener(**new** OnCompletionListener() \{ 
143. **public** **void** onCompletion(MediaPlayer mp) \{ 
144. 
145.  \} 
146.  \}); 
147. 
148.  \} **catch** (Exception e) \{ 
149.  e.printStackTrace(); 
150.  \} 
151. 
152.  \} 
153. 
154. **private** **void** stop() \{ 
155. 
156.  \} 
157. 
158. \}

附上代码，希望有需要的可以下载研究完善。

转自：http://104zz.iteye.com/blog/1709840

[fff094d7-e27e-3a94-90e1-f8ee90452174.png]: /images/20220614/7a1b181ec21c4afe97c8e0b2d9b26f89.png
[dfbeaff7-48e3-32f1-8d47-497e093ff7c2.png]: /images/20220614/a96979af85aa42e68929ca8baff5e9c2.png
[71ef5d26-5c2c-3100-a1cc-9911eee2c51e.png]: /images/20220614/03a13296ca354902be90e31dd8007937.png
[f0a97fb3-bea4-38b0-a284-30314c6e9334.png]: /images/20220614/84c4a39953474292949e660db0ad1f2f.png
[ba22812e-8a52-3fb8-a79c-844ca0d88f02.png]: /images/20220614/3494784cbd8a436ba751e9b3435b4f98.png
[icon_star.png]: /images/20220614/98d810e9608546aa9b6cc63ec1cafde3.png