详解Android性能优化之启动优化

package com.noahedu.myapplication.aspectj;

import android.util.Log;

import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.Signature;
import org.aspectj.lang.annotation.Around;
import org.aspectj.lang.annotation.Aspect;

@Aspect
public class MyApplicationAspectj {

    @Around("call(* com.noahedu.myapplication.MyApplication.**(..))")
    public void getTime(ProceedingJoinPoint joinPoint){
        Signature signature = joinPoint.getSignature();
        String name = signature.getName();
        long time = System.currentTimeMillis();
        try {
            joinPoint.proceed();
        } catch (Throwable throwable) {
            throwable.printStackTrace();
        }
        Log.e("MyApplicationAspectj " ,(name + " cost " + (System.currentTimeMillis() - time)));
    }
}

 Debug.startMethodTracing("MyApplication");
      //TODO
 Debug.stopMethodTracing();

package com.noahedu.myapplication;

import android.app.Application;
import android.os.Debug;
import android.util.Log;

public class MyApplication extends Application {

    @Override
    public void onCreate() {
        super.onCreate();
        Debug.startMethodTracing("MyApplication");
        taskOne();
        taskTwo();
        taskThrid();
        taskFour();
        Debug.stopMethodTracing();
    }

    public void taskOne(){
        try {
            Thread.sleep(150);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
    }

    public void taskTwo(){
        try {
            Thread.sleep(2050);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
    }

    public void taskThrid(){
        try {
            Thread.sleep(350);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
    }

    public void taskFour(){
        try {
            Thread.sleep(1000);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
    }
}

package com.noahedu.launchertool.launchstarter.sort;


import com.noahedu.launchertool.launchstarter.task.Task;
import com.noahedu.launchertool.launchstarter.utils.DispatcherLog;

import java.util.ArrayList;
import java.util.List;
import java.util.Set;

import androidx.annotation.NonNull;
import androidx.collection.ArraySet;


public class TaskSortUtil {

    private static List<Task> sNewTasksHigh = new ArrayList<>();// 高优先级的Task

    
    public static synchronized List<Task> getSortResult(List<Task> originTasks,
                                                        List<Class<? extends Task>> clsLaunchTasks) {
        long makeTime = System.currentTimeMillis();

        Set<Integer> dependSet = new ArraySet<>();
        Graph graph = new Graph(originTasks.size());
        for (int i = 0; i < originTasks.size(); i++) {
            Task task = originTasks.get(i);
            if (task.isSend() || task.dependsOn() == null || task.dependsOn().size() == 0) {
                continue;
            }
            for (Class cls : task.dependsOn()) {
                int indexOfDepend = getIndexOfTask(originTasks, clsLaunchTasks, cls);
                if (indexOfDepend < 0) {
                    throw new IllegalStateException(task.getClass().getSimpleName() +
                            " depends on " + cls.getSimpleName() + " can not be found in task list ");
                }
                dependSet.add(indexOfDepend);
                graph.addEdge(indexOfDepend, i);
            }
        }
        List<Integer> indexList = graph.topologicalSort();
        List<Task> newTasksAll = getResultTasks(originTasks, dependSet, indexList);

        DispatcherLog.i("task analyse cost makeTime " + (System.currentTimeMillis() - makeTime));
        printAllTaskName(newTasksAll);
        return newTasksAll;
    }

    @NonNull
    private static List<Task> getResultTasks(List<Task> originTasks,
                                             Set<Integer> dependSet, List<Integer> indexList) {
        List<Task> newTasksAll = new ArrayList<>(originTasks.size());
        List<Task> newTasksDepended = new ArrayList<>();// 被别人依赖的
        List<Task> newTasksWithOutDepend = new ArrayList<>();// 没有依赖的
        List<Task> newTasksRunAsSoon = new ArrayList<>();// 需要提升自己优先级的，先执行（这个先是相对于没有依赖的先）
        for (int index : indexList) {
            if (dependSet.contains(index)) {
                newTasksDepended.add(originTasks.get(index));
            } else {
                Task task = originTasks.get(index);
                if (task.needRunAsSoon()) {
                    newTasksRunAsSoon.add(task);
                } else {
                    newTasksWithOutDepend.add(task);
                }
            }
        }
        // 顺序：被别人依赖的————》需要提升自己优先级的————》需要被等待的————》没有依赖的
        sNewTasksHigh.addAll(newTasksDepended);
        sNewTasksHigh.addAll(newTasksRunAsSoon);
        newTasksAll.addAll(sNewTasksHigh);
        newTasksAll.addAll(newTasksWithOutDepend);
        return newTasksAll;
    }

    private static void printAllTaskName(List<Task> newTasksAll) {
        if (true) {
            return;
        }
        for (Task task : newTasksAll) {
            DispatcherLog.i(task.getClass().getSimpleName());
        }
    }

    public static List<Task> getTasksHigh() {
        return sNewTasksHigh;
    }

    
    private static int getIndexOfTask(List<Task> originTasks,
                                      List<Class<? extends Task>> clsLaunchTasks, Class cls) {
        int index = clsLaunchTasks.indexOf(cls);
        if (index >= 0) {
            return index;
        }

        // 仅仅是保护性代码
        final int size = originTasks.size();
        for (int i = 0; i < size; i++) {
            if (cls.getSimpleName().equals(originTasks.get(i).getClass().getSimpleName())) {
                return i;
            }
        }
        return index;
    }
}

package com.noahedu.launchertool.launchstarter.task;

import android.os.Looper;
import android.os.Process;

import com.noahedu.launchertool.launchstarter.TaskDispatcher;
import com.noahedu.launchertool.launchstarter.stat.TaskStat;
import com.noahedu.launchertool.launchstarter.utils.DispatcherLog;



public class DispatchRunnable implements Runnable {
    private Task mTask;
    private TaskDispatcher mTaskDispatcher;

    public DispatchRunnable(Task task) {
        this.mTask = task;
    }
    public DispatchRunnable(Task task,TaskDispatcher dispatcher) {
        this.mTask = task;
        this.mTaskDispatcher = dispatcher;
    }

    @Override
    public void run() {
        DispatcherLog.i(mTask.getClass().getSimpleName()
                + " begin run" + "  Situation  " + TaskStat.getCurrentSituation());

        Process.setThreadPriority(mTask.priority());

        long startTime = System.currentTimeMillis();

        mTask.setWaiting(true);
        mTask.waitToSatisfy();

        long waitTime = System.currentTimeMillis() - startTime;
        startTime = System.currentTimeMillis();

        // 执行Task
        mTask.setRunning(true);
        mTask.run();

        // 执行Task的尾部任务
        Runnable tailRunnable = mTask.getTailRunnable();
        if (tailRunnable != null) {
            tailRunnable.run();
        }

        if (!mTask.needCall() || !mTask.runOnMainThread()) {
            printTaskLog(startTime, waitTime);

            TaskStat.markTaskDone();
            mTask.setFinished(true);
            if(mTaskDispatcher != null){
                mTaskDispatcher.satisfyChildren(mTask);
                mTaskDispatcher.markTaskDone(mTask);
            }
            DispatcherLog.i(mTask.getClass().getSimpleName() + " finish");
        }
    }

    
    private void printTaskLog(long startTime, long waitTime) {
        long runTime = System.currentTimeMillis() - startTime;
        if (DispatcherLog.isDebug()) {
            DispatcherLog.i(mTask.getClass().getSimpleName() + "  wait " + waitTime + "    run "
                    + runTime + "   isMain " + (Looper.getMainLooper() == Looper.myLooper())
                    + "  needWait " + (mTask.needWait() || (Looper.getMainLooper() == Looper.myLooper()))
                    + "  ThreadId " + Thread.currentThread().getId()
                    + "  ThreadName " + Thread.currentThread().getName()
                    + "  Situation  " + TaskStat.getCurrentSituation()
            );
        }
    }

}