Android 使用ToneGenerator编写按键发声功能
转载： http://www.2cto.com/kf/201312/262961.html
今天给大家介绍的是怎么样使用ToneGenerator编写按键发声功能，这个在我们开发的时候用到的地方很多(例如电话键盘按键)，那么我们就来看看吧，下面我们就用一个例子来说说怎么样能实现这个功能。
file： MainActivity.java
package com.example.helloworld;
import android.media.AudioManager;
import android.media.ToneGenerator;
import android.os.Bundle;
import android.provider.Settings;
import android.app.Activity;
import android.content.Context;
import android.view.Menu;
import android.view.View;
import android.widget.Button;
public class MainActivity extends Activity {
private Button btn1, btn2, btn3;
private int value;
private ToneGenerator mToneGenerator;
private Object mToneGeneratorLock = new Object(); // 监视器对象锁
private boolean mDTMFToneEnabled; // 按键操作音
private static final int TONE_LENGTH_MS = 150; // 延迟时间
private AudioManager mAudioManager;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
btn1 = (Button) findViewById(R.id.button1);
btn1.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
btn1.setText(value + "");
playTone(value);
value++;
if (value > 9) {
value = 0;
}
}
});
btn2 = (Button) findViewById(R.id.button2);
btn2.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
playTone(42); // *: 42
}
});
btn3 = (Button) findViewById(R.id.button3);
btn3.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
playTone(35); // #: 35
}
});
mAudioManager = (AudioManager) getSystemService(Context.AUDIO_SERVICE);
mDTMFToneEnabled = Settings.System.getInt(getContentResolver(),
Settings.System.DTMF_TONE_WHEN_DIALING, 1) == 1;
synchronized (mToneGeneratorLock) {
if (mToneGenerator == null) {
try {
mToneGenerator = new ToneGenerator(
AudioManager.STREAM_MUSIC, 80);
setVolumeControlStream(AudioManager.STREAM_MUSIC);
} catch (Exception e) {
e.printStackTrace();
mToneGenerator = null;
}
}
}
}
// 播放按键声音
void playTone(int tone) {
if (!mDTMFToneEnabled) {
return;
}
int ringerMode = mAudioManager.getRingerMode();
if ((ringerMode == AudioManager.RINGER_MODE_SILENT)
|| (ringerMode == AudioManager.RINGER_MODE_VIBRATE)) {
// 静音或者震动时不发出按键声音
return;
}
synchronized (mToneGeneratorLock) {
if (mToneGenerator == null) {
return;
}
mToneGenerator.startTone(tone, TONE_LENGTH_MS); // 发声
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
}
activity_main.xml：
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context=".MainActivity" >
<TextView
android:id="@+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/hello_world" />
<Button
android:id="@+id/button1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/textView1"
android:layout_below="@+id/textView1"
android:layout_marginTop="31dp"
android:text="Button" />
<Button
android:id="@+id/button2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBaseline="@+id/button1"
android:layout_alignBottom="@+id/button1"
android:layout_centerHorizontal="true"
android:text="Button" />
<Button
android:id="@+id/button3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBaseline="@+id/button2"
android:layout_alignBottom="@+id/button2"
android:layout_alignParentRight="true"
android:text="Button" />
</RelativeLayout>
AndroidManifest.xml：
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.helloworld"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="19" />
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name="com.example.helloworld.MainActivity"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
下面是另一种写法
MainActivity.java
1 package com.example.toneplayer;
2
3 import android.media.AudioManager;
4 import android.media.ToneGenerator;
5 import android.os.Bundle;
6 import android.provider.Settings;
7 import android.app.Activity;
8 import android.content.Context;
9 import android.util.Log;
10 import android.view.Menu;
11 import android.view.View;
12 import android.widget.Button;
13
14 public class MainActivity extends Activity {
15
16 /** Tone音的长度，单位：milliseconds */
17 private static final int TONE_LENGTH_MS = -1;
18 /** 主音量的比例：以80%的主音量播放Tone音 */
19 private static final int TONE_RELATIVE_VOLUME = 80;
20 /** 主音量的音频种别 */
21 private static final int DIAL_TONE_STREAM_TYPE = AudioManager.STREAM_MUSIC;
22 private static final String TAG = "TonePlayer";
23
24 // Tone音播放器
25 private ToneGenerator mToneGenerator;
26 // Tone相关的同步锁
27 private Object mToneGeneratorLock = new Object();
28 // 设定中的Tone音播放设置
29 private boolean mDTMFToneEnabled;
30
31 private Button btn1, btn2;
32
33 private int value;
34
35 @Override
36 protected void onCreate(Bundle savedInstanceState) {
37 super.onCreate(savedInstanceState);
38 setContentView(R.layout.activity_main);
39
40 btn1 = (Button) findViewById(R.id.button1);
41 btn1.setOnClickListener(new View.OnClickListener() {
42
43 @Override
44 public void onClick(View v) {
45 // TODO Auto-generated method stub
46 btn1.setText(value + "");
47 playTone(value);
48 value++;
49 if (value > 9) {
50 value = 0;
51 }
52 }
53 });
54
55 btn2 = (Button) findViewById(R.id.button2);
56 btn2.setOnClickListener(new View.OnClickListener() {
57 @Override
58 public void onClick(View v) {
59 playTone(42); // *: 42
60 }
61 });
62 }
63
64 @Override
65 public boolean onCreateOptionsMenu(Menu menu) {
66 // Inflate the menu; this adds items to the action bar if it is present.
67 getMenuInflater().inflate(R.menu.main, menu);
68 return true;
69 }
70
71 public void onResume() {
72 super.onResume();
73 // 读取设定的值
74 mDTMFToneEnabled = Settings.System.getInt(getContentResolver(),
75 Settings.System.DTMF_TONE_WHEN_DIALING, 1) == 1;
76
77 // 失败了也无所谓，不是啥重要的东西
78 synchronized (mToneGeneratorLock) {
79 if (mToneGenerator == null) {
80 try {
81 // we want the user to be ableto control the volume of the
82 // dial tones
83 // outside of a call, so we usethe stream type that is also
84 // mapped to the
85 // volume control keys for thisactivity
86 mToneGenerator = new ToneGenerator(DIAL_TONE_STREAM_TYPE,
87 TONE_RELATIVE_VOLUME);
88 setVolumeControlStream(DIAL_TONE_STREAM_TYPE);
89 } catch (RuntimeException e) {
90 Log.w(TAG,
91 "Exceptioncaught while creating local tone generator: "
92 + e);
93 mToneGenerator = null;
94 }
95 }
96 }
97 }
98
99 public void onPause() {
100 super.onPause();
101
102 synchronized (mToneGeneratorLock) {
103 if (mToneGenerator != null) {
104 mToneGenerator.release();
105 mToneGenerator = null;
106 }
107 }
108 }
109
110 /**
111 * 播放TONE_LENGTH_MS milliseconds的Tone音. 只有在设定中选择了播放Tone，并且不是静音模式才会播放Tone音。
112 *
113 * @param tone
114 * a tone code from {@linkToneGenerator}
115 */
116 void playTone(int tone) {
117 // 设定中没有选中的话，就不播
118 if (!mDTMFToneEnabled) {
119 return;
120 }
121
122 // 静音模式的时候也不播，需要每次都检查，因为没有Activity切换也能设成静音模式
123 // 设定中的那个就不需要，因为要设定必须要先切入设定Activity才行
124 AudioManager audioManager = (AudioManager) getSystemService(Context.AUDIO_SERVICE);
125 int ringerMode = audioManager.getRingerMode();
126 if ((ringerMode == AudioManager.RINGER_MODE_SILENT)
127 || (ringerMode == AudioManager.RINGER_MODE_VIBRATE)) {
128 return;
129 }
130
131 synchronized (mToneGeneratorLock) {
132 if (mToneGenerator == null) {
133 Log.w(TAG, "playTone:mToneGenerator == null, tone: " + tone);
134 return;
135 }
136
137 // Start the new tone (will stop anyplaying tone)
138 mToneGenerator.startTone(tone, TONE_LENGTH_MS);
139 }
140 }
141 }
activity_main.xml：
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" android:paddingBottom="@dimen/activity_vertical_margin" android:paddingLeft="@dimen/activity_horizontal_margin" android:paddingRight="@dimen/activity_horizontal_margin" android:paddingTop="@dimen/activity_vertical_margin" tools:context=".MainActivity" > <Button android:id="@+id/button1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentLeft="true" android:layout_alignParentTop="true" android:layout_marginLeft="24dp" android:layout_marginTop="31dp" android:text="Button" /> <Button android:id="@+id/button2" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignRight="@+id/button1" android:layout_below="@+id/button1" android:layout_marginTop="54dp" android:text="Button" /> </RelativeLayout>
AndroidManifest.xml：
<?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.example.toneplayer" android:versionCode="1" android:versionName="1.0" > <uses-sdk android:minSdkVersion="8" android:targetSdkVersion="18" /> <application android:allowBackup="true" android:icon="@drawable/ic_launcher" android:label="@string/app_name" android:theme="@style/AppTheme" > <activity android:name="com.example.toneplayer.MainActivity" android:label="@string/app_name" > <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> </application> </manifest>
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