如何让我的动画更流畅Android

我有一个应用程序，在屏幕上有一个球。 当球在中途时应用程序记录一些音频，计算FFT并进行一些额外的分析。

这是由Asynctask处理的，但动画仍然短暂地断断续续。

有没有人对如何让它运行更顺畅有任何建议？

谢谢

代码如下：

import com.ben.applicationLayer.GameView; import dataObjectLayer.Sprite; import dataObjectLayer.MusicalNote; import android.media.AudioRecord; import android.media.MediaRecorder.AudioSource; import android.media.AudioFormat; import android.os.AsyncTask; public class recorderThread extends AsyncTask { short[] audioData; int bufferSize; Sprite ballComp; @Override protected Integer doInBackground(Sprite... ball) { MusicalNote note = ball[0].expectedNote; ballComp = ball[0]; boolean recorded = false; double frequency; int sampleRate = 8192; AudioRecord recorder = instatiateRecorder(sampleRate); double[] magnitude = new double[1024]; double[] audioDataDoubles = new double[2048]; while (!recorded) { //loop until recording is running if (recorder.getState()==android.media.AudioRecord.STATE_INITIALIZED) // check to see if the recorder has initialized yet. { if (recorder.getRecordingState()==android.media.AudioRecord.RECORDSTATE_STOPPED) recorder.startRecording(); //check to see if the Recorder has stopped or is not recording, and make it record. else { double max_index; recorder.read(audioData,0,bufferSize); //read the PCM audio data into the audioData array computeFFT(audioDataDoubles, magnitude); max_index = getLargestPeakIndex(magnitude); frequency = getFrequencyFromIndex(max_index, sampleRate); //checks if correct frequency, assigns number int correctNo = correctNumber(frequency, note); checkIfMultipleNotes(correctNo, max_index, frequency, sampleRate, magnitude, note); if (audioDataIsNotEmpty()) recorded = true; if (correctNo!=1) return correctNo; } } else { recorded = false; recorder = instatiateRecorder(sampleRate); } } if (recorder.getState()==android.media.AudioRecord.RECORDSTATE_RECORDING) { killRecorder(recorder); } return 1; } private void killRecorder(AudioRecord recorder) { recorder.stop(); //stop the recorder before ending the thread recorder.release(); //release the recorders resources recorder=null; //set the recorder to be garbage collected } @Override protected void onPostExecute(Integer result) { (result == 2) GameView.score++; } private AudioRecord instatiateRecorder(int sampleRate) { bufferSize= AudioRecord.getMinBufferSize(sampleRate,AudioFormat.CHANNEL_CONFIGURATION_MONO, AudioFormat.ENCODING_PCM_16BIT)*2; //get the buffer size to use with this audio record AudioRecord recorder = new AudioRecord (AudioSource.MIC,sampleRate, AudioFormat.CHANNEL_CONFIGURATION_MONO, AudioFormat.ENCODING_PCM_16BIT,bufferSize); //instantiate the AudioRecorder audioData = new short [bufferSize]; //short array that pcm data is put into. return recorder; } } 

Answer 1

使用Asynctask就像你想要做的那样。 但是，我建议使用线程池。 然后，您可以将动画作为任务添加，将录音添加为任务，将FFT作为另一项任务添加，将附加分析作为任务添加。

简短的口吃可能是在动画线程中为记录分配资源的结果。 使用池意味着您在创建运行音频任务的线程时不必暂停。 显然，一些代码可以方便地完全理解您的问题。

看一眼：

ScheduledThreadPoolExecutor http://docs.oracle.com/javase/6/docs/api/java/util/concurrent/ScheduledThreadPoolExecutor.html

要么

ThreadPoolExecutor http://docs.oracle.com/javase/6/docs/api/java/util/concurrent/ThreadPoolExecutor.html

您可能想要做的一个非常简单的示例：

在您的活动中，您可以定义此项以启动任务

 ExecutorService threadPool = new ScheduledThreadPoolExecutor(2); Recording record = new Recording(); Ball ball = new Ball(threadPool, record); threadPool.submit(ball); 

Ball.java

 import java.util.concurrent.ExecutorService; public class Ball implements Runnable { private final Recording record; private final ExecutorService threadPool; private boolean condition; private boolean active; public Ball(ExecutorService threadPool, Recording record) { this.record = record; this.threadPool = threadPool; this.active = true; } @Override public void run() { while (this.active) { moveBall(); if (isBallHalfway()) { threadPool.submit(record); } } } private boolean isBallHalfway() { return condition; // Condition for determining when ball is halfway } private void moveBall() { // Code to move the ball } } 

Recording.java

 public class Recording implements Runnable { @Override public void run() { // Do recording tasks here } } 

Answer 2

正如穆罕默德所说，如果没有看到代码，很难猜出问题可能是什么。 考虑到这一点…

听起来你的AsyncTask可能会阻止其他线程执行。 确保在那里调用Thread.sleep()以使调度程序有机会切换回UI线程（ Thread.yield()也是一个选项，但要注意有一些带有yield的陷阱）。

Answer 3

没有代码就很难猜到可以优化，但是我会告诉你我在加载时有超过100万次操作。•如果你有性能问题，试试：1 – 检查你的数据类型的变量并设置如果您确定变量不需要更多字节，则更低，即对于大小而言您是短而不是int。

2 – 检查你的代码并尝试将所有结果存储起来以便下次启动，并在下次调用它们而不是再次计算它们。

•但是如果您的问题是动画很慢并且您对内存没有任何问题，那么请尝试缩短动画时段或增加动作单位。

顺便问一下，你如何实现动画？ 逐帧动画，布局动画或视图动画？