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audio - Android SoundPool not playing upon resuming activity - Stack Overflow
The SoundPool class manages and plays audio resources for applications. A SoundPool is a collection of samples that can be loaded into android soundpool resume from a resource inside the APK or from a file in the android soundpool resume system. The SoundPool library uses the MediaPlayer service to decode the audio into a raw bit PCM mono or stereo stream.
This allows applications to ship with compressed streams without having to suffer the CPU load and latency of decompressing during playback. In addition to low-latency playback, Android soundpool resume can also manage the number of audio streams android soundpool resume rendered at once.
When the SoundPool object is constructed, the maxStreams parameter sets the maximum number of streams that can be played at a time from this single SoundPool. SoundPool tracks the number of active streams, android soundpool resume.
If the maximum number of streams is exceeded, SoundPool will automatically stop a previously playing stream based first on priority and then by age within that priority. Limiting the maximum number of streams helps to cap CPU loading and reducing the likelihood that audio mixing will impact visuals or UI performance.
Sounds can be looped by setting a non-zero loop value. A value of -1 causes the sound to loop forever. In this case, the application must explicitly call the stop function to stop the sound. Any other non-zero value will cause the sound to repeat the specified number of times, e.
android soundpool resume value of 3 causes the sound to play a total of 4 times. The playback rate can also be changed. A playback rate of 1. A playback rate of 2. The playback rate range is 0, android soundpool resume. Priority runs low to high, i, android soundpool resume. higher numbers are higher priority. Priority is used when a call to play would cause the number of active streams to exceed the value established by the maxStreams parameter when the SoundPool was created.
In this case, the stream allocator will stop the lowest priority stream. If there are multiple streams with the same low priority, it will choose the oldest stream to stop. In the case where the priority of the new stream is lower android soundpool resume all the active streams, the new sound will not play and the play function will return a streamID of zero.
Let's examine a typical use case: A game consists of several levels of play. For each level, there is a set of unique sounds that are used only by that level. In this case, the game logic should create a new Android soundpool resume object when the first level is loaded. The level data itself might contain the list of sounds to android soundpool resume used by this level. The loading logic iterates through the list of sounds calling the appropriate SoundPool, android soundpool resume.
load function. This should typically be done early in the process to allow time for decompressing the audio to raw PCM format before they are needed for playback. Once the sounds are loaded and play has started, the application can trigger sounds by calling SoundPool, android soundpool resume. Playing streams can be paused or resumed, and the application can also alter the pitch by adjusting the playback rate in real-time for doppler or synthesis effects.
Note that since streams can be stopped due to resource constraints, the streamID is a reference to a particular instance of a stream. If the stream is stopped to allow a higher priority stream to play, the stream is no longer be valid. However, the application is allowed to call methods on the streamID without error. This may help simplify program logic since the application need not concern itself with the stream lifecycle. In our example, when the player has completed the level, the game logic should call SoundPool.
release to release all the native resources in use and then set the SoundPool reference to null. If the player starts another level, a new SoundPool is created, sounds are loaded, and play resumes. Pause all active streams. Pause all streams that are currently playing. This function iterates through all the active streams and pauses any that are playing. It also sets a flag so that any streams that are playing can be resumed by calling autoResume.
Resume all previously active streams. Automatically resumes all streams that were paused in previous calls to autoPause. Load the sound from the specified APK resource. Note that the extension is dropped. For example, if you want to load a sound from the raw resource file "explosion. mp3", android soundpool resume, you would specify "R. explosion" as the resource ID. Note that this means you cannot have both an "explosion.
wav" and an "explosion. Load the sound from a FileDescriptor. This version is useful if you store multiple sounds in a single binary. The offset specifies the offset from the start of the file and the length specifies the length of the sound within the file.
Pause a playback stream. Pause the stream specified by the streamID. This is the value returned by the play function, android soundpool resume. If the stream is playing, it will be paused. If the stream is not playing e. is stopped or was previously pausedcalling this function will have android soundpool resume effect. Play a sound from a sound ID. Play the sound specified by the soundID.
This is the value returned by the load function, android soundpool resume. Returns a non-zero streamID if successful, zero if it fails. The streamID can be used to further control playback. Note that calling play may cause another sound to stop playing if the maximum number of active streams is exceeded. A loop value of -1 means loop forever, a value of 0 means don't loop, other values indicate the number of repeats, e.
a value of 1 plays the audio twice. The playback rate allows the application to vary the playback rate pitch of the sound, android soundpool resume. A value of 1. A value of 2. Release the SoundPool resources. Release all memory and native resources used by the SoundPool object. The SoundPool can no longer be used and the reference should be set to null. Resume a playback stream. Resume the stream specified by the streamID.
If the stream is paused, this will resume playback. If the stream was not previously paused, calling this function will have no effect. Set loop mode. Change the loop mode. If the stream does not exist, it will have no effect. Change stream priority.
Change the priority of the stream specified by the streamID. Affects the order in which streams are re-used to play new sounds. Change playback rate. Set stream volume. Sets the volume on the stream specified by the streamID. The value must be in the range of 0. Stop a playback stream. Stop the stream specified by the streamID. If the stream is playing, it will be stopped. It also releases any native resources associated with this stream. If the stream is not playing, it will have no effect.
Unload a sound from a sound ID. Unloads the sound specified by the soundID. Returns true if the sound is successfully unloaded, false if the sound was already unloaded. Invoked when the garbage collector has detected that this instance is no longer reachable.
Capstones: Resume Tips
, time: 27:49SoundPool - Coding in Flow
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