Android测量每秒帧数FramesPerSecond(FPS)的方法_安卓每秒多少帧数掉帧

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每秒帧数

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Android测量每秒帧数测量每秒帧数Frames Per Second (FPS)的方法的方法

主要介绍了Android测量每秒帧数Frames Per Second (FPS)的方法,涉及Android针对多媒体文件属性操作的相

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本文实例讲述了Android测量每秒帧数Frames Per Second (FPS)的方法。分享给大家供大家参考。具体如下：

MainThread.java：

package net.obviam.droidz;

import java.text.DecimalFormat;

import android.graphics.Canvas;

import android.util.Log;

import android.view.SurfaceHolder;

/**

* @author impaler

* The Main thread which contains the game loop. The thread must have access to

* the surface view and holder to trigger events every game tick.

public class MainThread extends Thread {

private static final String TAG = MainThread.class.getSimpleName();

// desired fps

private final static int MAX_FPS = 50;

// maximum number of frames to be skipped

private final static int MAX_FRAME_SKIPS = 5;

// the frame period

private final static int FRAME_PERIOD = 1000 / MAX_FPS;

// Stuff for stats */

private DecimalFormat df = new DecimalFormat("0.##"); // 2 dp

// we'll be reading the stats every second

private final static int STAT_INTERVAL = 1000; //ms

// the average will be calculated by storing

// the last n FPSs

private final static int FPS_HISTORY_NR = 10;

// last time the status was stored

private long lastStatusStore = 0;

// the status time counter

private long statusIntervalTimer = 0l;

// number of frames skipped since the game started

private long totalFramesSkipped = 0l;

// number of frames skipped in a store cycle (1 sec)

private long framesSkippedPerStatCycle = 0l;

// number of rendered frames in an interval

private int frameCountPerStatCycle = 0;

private long totalFrameCount = 0l;

// the last FPS values

private double fpsStore[];

// the number of times the stat has been read

private long statsCount = 0;

// the average FPS since the game started

private double averageFps = 0.0;

// Surface holder that can access the physical surface

private SurfaceHolder surfaceHolder;

// The actual view that handles inputs

// and draws to the surface

private MainGamePanel gamePanel;

// flag to hold game state

private boolean running;

public void setRunning(boolean running) {

this.running = running;

}

public MainThread(SurfaceHolder surfaceHolder, MainGamePanel gamePanel) {

super();

this.surfaceHolder = surfaceHolder;

this.gamePanel = gamePanel;

}

@Override

public void run() {

Canvas canvas;

Log.d(TAG, "Starting game loop");

// initialise timing elements for stat gathering

initTimingElements();

long beginTime; // the time when the cycle begun

long timeDiff; // the time it took for the cycle to execute

int sleepTime; // ms to sleep (<0 if we're behind)

int framesSkipped; // number of frames being skipped

sleepTime = 0;

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