Recently in Reading Zxing project, learned a lot of things. Recommend that you also read. There is a Beepmanager class that implements a beep and vibration. Let's take a look at how he did it:
Bee-Ringing
1. Prepare an audio file for example: Beep.ogg. Ogg format is a kind of sound compression format, similar to MP3. When we are ready to play it, it produces a beep effect.
2. The default audio channel registered for the activity.
Activity.setvolumecontrolstream (Audiomanager.stream_music);
This is declared as the channel of Stream_music, is multimedia playback, after registering, we use the volume on the phone on the size of the key can adjust the playback sound size.
If this channel is not set, our activity Default Volume button processing will be used for the size of the phone ring tone.
3. Check the current ring tone mode, or become a situation mode.
Description: Getringermode ()--Returns the current ringtone mode. such as Ringer_mode_normal (ordinary), ringer_mode_silent (Mute), ringer_mode_vibrate (vibration)
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If you are currently in the ring tone mode, continue to prepare the following beep beep operation, if it is mute or vibrating mode. Don't go on. Because the user chooses the silent mode, we also do not make a noise.
Audiomanager Audioservice = (audiomanager) activity
. Getsystemservice (Context.audio_service);
if (Audioservice.getringermode ()!= audiomanager.ringer_mode_normal) {
Shouldplaybeep = false;
}
4. Initialize the MediaPlayer object and specify that the sound channel to play is Stream_music, which is consistent with the steps above and points to the same channel. MediaPlayer MediaPlayer = new MediaPlayer ();
Mediaplayer.setaudiostreamtype (Audiomanager.stream_music);
Registers an event. When the playback is complete, point again at the beginning of the stream file to prepare for the next playback.
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When the Beep has finished playing, rewind to queue up another one.
MediaPlayer
. Setoncompletionlistener (New Mediaplayer.oncompletionlistener () {
@Override
public void Oncompletion (MediaPlayer player) {
Player.seekto (0);
}
});
Set the data source and prepare to play
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Assetfiledescriptor file = Activity.getresources (). OPENRAWRESOURCEFD (
R.raw.beep);
try {
Mediaplayer.setdatasource (File.getfiledescriptor (),
File.getstartoffset (), file.getlength ());
File.close ();
Mediaplayer.setvolume (Beep_volume, Beep_volume);
Mediaplayer.prepare ();
catch (IOException IoE) {
LOG.W (TAG, IoE);
MediaPlayer = null;
}
return mediaPlayer;
5. Start Playback
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if (playbeep && mediaPlayer!= null) {
Mediaplayer.start ();
}
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Vibrating
This is relatively simple. A two-step:
1. Declaring permissions
Write in Androidmanifest.xml.
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<uses-permission android:name= "Android.permission.VIBRATE"/>
2. Get vibration service.
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Vibrator Vibrator = (Vibrator) activity.getsystemservice (Context.vibrator_service);
3. Start Vibration.
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Vibrator.vibrate (vibrate_duration);
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public void Playbeepsoundandvibrate () {
if (enablevibrate) {
Vibra Tor vibrator = (vibrator) activity
. Getsystemservice (Context.vibrator_service);
//Shake once
vibrator.vibrate (vibrate_duration);
//The first parameter, which refers to an array of frequencies of vibrations. Each two is a group, the first of each group is the wait time, and the second is the vibration time.
//For example [2000,500,100,400], it waits 2000 milliseconds, vibrates 500, waits 100, vibrates
//The second parameter, repest refers to starting the loop vibration from the position of the first few indexes (one array parameter).
//Will be kept loop, we need to use Vibrator.cancel () active termination of the
//vibrator.vibrate (new long[]{300,500},0);
}
}
