feat: 添加帧率监控功能

.gitignore

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+*.iml
+.gradle
+/local.properties
+/.idea/caches
+/.idea/libraries
+/.idea/modules.xml
+/.idea/workspace.xml
+/.idea/navEditor.xml
+/.idea/assetWizardSettings.xml
+.DS_Store
+/build
+/captures
+.externalNativeBuild
+.cxx
+local.properties

FrameRateMonitor/.gitignore

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+/build

FrameRateMonitor/build.gradle

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+apply plugin: 'com.android.library'
+
+android {
+
+    compileSdkVersion 28
+
+    defaultConfig {
+        minSdkVersion 16
+        //noinspection ExpiredTargetSdkVersion
+        targetSdkVersion 28
+        versionCode 1
+        versionName "1.0"
+        consumerProguardFiles 'plugin-proguard-rules.pro'
+    }
+
+    buildTypes {
+        release {
+            minifyEnabled false
+            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
+        }
+    }
+    compileOptions {
+        sourceCompatibility JavaVersion.VERSION_1_8
+        targetCompatibility JavaVersion.VERSION_1_8
+    }
+}
+
+dependencies {
+    implementation fileTree(dir: 'libs', include: ['*.jar'])
+}

FrameRateMonitor/proguard-rules.pro

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+# Add project specific ProGuard rules here.
+# You can control the set of applied configuration files using the
+# proguardFiles setting in build.gradle.
+#
+# For more details, see
+#   http://developer.android.com/guide/developing/tools/proguard.html
+
+# If your project uses WebView with JS, uncomment the following
+# and specify the fully qualified class name to the JavaScript interface
+# class:
+#-keepclassmembers class fqcn.of.javascript.interface.for.webview {
+#   public *;
+#}
+
+# Uncomment this to preserve the line number information for
+# debugging stack traces.
+#-keepattributes SourceFile,LineNumberTable
+
+# If you keep the line number information, uncomment this to
+# hide the original source file name.
+#-renamesourcefileattribute SourceFile

FrameRateMonitor/src/main/AndroidManifest.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="com.erlei.tools.fpsmonitor">
+    <uses-permission android:name="android.permission.SYSTEM_ALERT_WINDOW"/>
+</manifest>

FrameRateMonitor/src/main/java/com/erlei/tools/fpsmonitor/Calculation.java

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+package com.erlei.tools.fpsmonitor;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.concurrent.TimeUnit;
+
+class Calculation {
+
+    public static List<Integer> getDroppedSet(FPSConfig fpsConfig, List<Long> dataSet) {
+        List<Integer> droppedSet = new ArrayList<>();
+        long start = -1;
+        for (Long value : dataSet) {
+            if (start == -1) {
+                start = value;
+                continue;
+            }
+            int droppedCount = droppedCount(start, value, fpsConfig.refreshRateInMs);
+            if (droppedCount > 0) {
+                droppedSet.add(droppedCount);
+            }
+            start = value;
+        }
+        return droppedSet;
+    }
+
+    public static int droppedCount(long start, long end, float devRefreshRate) {
+        int count = 0;
+        long diffNs = end - start;
+
+        long diffMs = TimeUnit.MILLISECONDS.convert(diffNs, TimeUnit.NANOSECONDS);
+        long dev = Math.round(devRefreshRate);
+        if (diffMs > dev) {
+            long droppedCount = (diffMs / dev);
+            count = (int) droppedCount;
+        }
+
+        return count;
+    }
+
+    public static FPSView.FrameInfo calculateMetric(FPSConfig fpsConfig,
+                                                    List<Long> dataSet,
+                                                    List<Integer> droppedSet) {
+        long timeInNS = dataSet.get(dataSet.size() - 1) - dataSet.get(0);
+        long size = getNumberOfFramesInSet(timeInNS, fpsConfig);
+
+        //metric
+        int runningOver = 0;
+        // total dropped
+        int dropped = 0;
+
+        for (Integer k : droppedSet) {
+            dropped += k;
+            if (k >= 2) {
+                runningOver += k;
+            }
+        }
+
+        float multiplier = fpsConfig.refreshRate / size;
+        float answer = multiplier * (size - dropped);
+        long realAnswer = Math.round(answer);
+
+        // calculate metric
+        float percentOver = (float) runningOver / (float) size;
+        int color = fpsConfig.colorEvaluator.evaluate(1 - percentOver);
+        return new FPSView.FrameInfo(color, realAnswer, (int) size, dropped, percentOver);
+    }
+
+    protected static long getNumberOfFramesInSet(long realSampleLengthNs, FPSConfig fpsConfig) {
+        float realSampleLengthMs = TimeUnit.MILLISECONDS.convert(realSampleLengthNs, TimeUnit.NANOSECONDS);
+        float size = realSampleLengthMs / fpsConfig.refreshRateInMs;
+        return Math.round(size);
+    }
+
+}

FrameRateMonitor/src/main/java/com/erlei/tools/fpsmonitor/ColorEvaluator.java

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+package com.erlei.tools.fpsmonitor;
+
+interface ColorEvaluator {
+    int evaluate(float fraction);
+}

FrameRateMonitor/src/main/java/com/erlei/tools/fpsmonitor/FPSConfig.java

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+package com.erlei.tools.fpsmonitor;
+
+import android.graphics.Color;
+import android.graphics.Rect;
+
+import java.util.concurrent.TimeUnit;
+
+class FPSConfig {
+    public static ColorEvaluator sColorEvaluator = fraction -> {
+        int color = Color.TRANSPARENT;
+        if (fraction >= 0.85) {
+            color = Color.GREEN;
+        } else if (fraction > 0.6 && fraction <= 0.85) {
+            color = Color.YELLOW;
+        } else if (fraction <= 0.6) {
+            color = Color.RED;
+        } else if (fraction == 0) {
+            color = Color.BLACK;
+        }
+        return color;
+    };
+    public float refreshRateInMs;
+    public float refreshRate;
+    public float textSize = 20;
+    public long showAnimateDuration = 200;
+    public long hideAnimateDuration = 200;
+    public long sampleTimeInNs = TimeUnit.NANOSECONDS.convert(1000, TimeUnit.MILLISECONDS);
+    public ColorEvaluator colorEvaluator = sColorEvaluator;
+    public float lineWidth = 2;
+    public float lineHeight = 0;
+    public float lineSpacing = 2;
+    public Rect rect;
+    public Float[] levelLines = new Float[]{1F, 0.85F, 0.7F, 0.4F, 0.2F};
+    /**
+     * 当连续N个fps等于设备最大fps时,跳过绘制
+     */
+    public int skipSameFpsCount = 2;
+}