Android P系统启动时间优化

骑猪看日落 2022-12-25 10:53 338阅读 0赞

1、services/core/java/com/android/server/policy/PhoneWindowManager.java

@Override
        public boolean canDismissBootAnimation() { 
            /*synchronized (mLock) { return mKeyguardDrawComplete; }*/
            return true;
        }

2、services/core/java/com/android/server/wm/WindowManagerService.java

// Poll interval in milliseconds for watching boot animation finished.
        private static final int BOOT_ANIMATION_POLL_INTERVAL = 200;
        private static final int BOOT_ANIMATION_DELAY_INTERVAL = 2000;

if (!mBootAnimationStopped) { 
        Trace.asyncTraceBegin(TRACE_TAG_WINDOW_MANAGER, "Stop bootanim", 0);
        // stop boot animation
        // formerly we would just kill the process, but we now ask it to exit so it
        // can choose where to stop the animation.
        SystemProperties.set("service.bootanim.exit", "1");
        mBootAnimationStopped = true;
    }

修改成：

if(mDelayBootAnimation) { 
        mDelayBootAnimation = false;
        mDelayWaiting = true;
        mH.sendEmptyMessageDelayed(H.DELAY_BOOT_ANIMATION_FINISHED,
                 BOOT_ANIMATION_DELAY_INTERVAL);
    } else { 
        if(mDelayWaiting) return;
        if (!mBootAnimationStopped) { 
            Trace.asyncTraceBegin(TRACE_TAG_WINDOW_MANAGER, "Stop bootanim", 0);
            // stop boot animation
            // formerly we would just kill the process, but we now ask it to exit so it
            // can choose where to stop the animation.
            Log.d("BootAnimation", "WMS SET service.bootanim.exit to 1");
            SystemProperties.set("service.bootanim.exit", "1");
            mBootAnimationStopped = true;
    }

handleMessage中增加逻辑：

public static final int DELAY_BOOT_ANIMATION_FINISHED = 62;
    case DELAY_BOOT_ANIMATION_FINISHED: { 
        mDelayWaiting = false;
        performEnableScreen();
    }
    break;

3、frameworks\\base\\cmds\\bootanimation\\bootanim.rc

service bootanim /system/bin/bootanimation
        class core animation
        user system
        group system audio
        disabled
        oneshot
        writepid /dev/stune/top-app/tasks

修改成：

service bootanim /system/bin/bootanimation
        class core animation
        user graphics
        group graphics audio
        oneshot
        writepid /dev/stune/top-app/tasks

4、packages\\apps\\Settings\\src/com/android/settings/FallbackHome.java

feat:reduce delay time

private void maybeFinish() { 
            if (getSystemService(UserManager.class).isUserUnlocked()) { 
                final Intent homeIntent = new Intent(Intent.ACTION_MAIN)
                        .addCategory(Intent.CATEGORY_HOME);
                final ResolveInfo homeInfo = getPackageManager().resolveActivity(homeIntent, 0);
                if (Objects.equals(getPackageName(), homeInfo.activityInfo.packageName)) { 
                    if (UserManager.isSplitSystemUser()
                            && UserHandle.myUserId() == UserHandle.USER_SYSTEM) { 
                        // This avoids the situation where the system user has no home activity after
                        // SUW and this activity continues to throw out warnings. See b/28870689.
                        return;
                    }
                    Log.d(TAG, "User unlocked but no home; let's hope someone enables one soon?");
                    // mHandler.sendEmptyMessageDelayed(0, 500); modify 500ms to 100ms
                    mHandler.sendEmptyMessageDelayed(0, 100);
                } else { 
                    Log.d(TAG, "User unlocked and real home found; let's go!");
                    getSystemService(PowerManager.class).userActivity(
                            SystemClock.uptimeMillis(), false);
                    finish();
                }
            }
        }

feat: remove fallbackhome anim

@Override
    protected void onCreate(Bundle savedInstanceState) { 
        super.onCreate(savedInstanceState);
    
        // Set ourselves totally black before the device is provisioned so that
        // we don't flash the wallpaper before SUW
      	/* mProvisioned = Settings.Global.getInt(getContentResolver(), Settings.Global.DEVICE_PROVISIONED, 0) != 0; if (!mProvisioned) { setTheme(R.style.FallbackHome_SetupWizard); getWindow().getDecorView().setSystemUiVisibility(View.SYSTEM_UI_FLAG_FULLSCREEN | View.SYSTEM_UI_FLAG_HIDE_NAVIGATION | View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY); } else { getWindow().getDecorView().setSystemUiVisibility(View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN | View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION); }*/
    
    
    	registerReceiver(mReceiver, new IntentFilter(Intent.ACTION_USER_UNLOCKED));
        maybeFinish();
    }
    
    @Override
    protected void onResume() { 
        super.onResume();
        if (mProvisioned) { 
            //mHandler.postDelayed(mProgressTimeoutRunnable, PROGRESS_TIMEOUT);
        }
    }
    
    @Override
    protected void onPause() { 
        super.onPause();
       // mHandler.removeCallbacks(mProgressTimeoutRunnable);
    }

5、cmds/bootanimation/BootAnimation.cpp

更改开机动画加载的路径:

static const char* bootFiles[] =
            { PRODUCT_BOOTANIMATION_FILE, OEM_BOOTANIMATION_FILE, SYSTEM_BOOTANIMATION_FILE};
    static const char* shutdownFiles[] =
            { PRODUCT_SHUTDOWNANIMATION_FILE, OEM_SHUTDOWNANIMATION_FILE, SYSTEM_SHUTDOWNANIMATION_FILE};

modify to:

static const char* bootFiles[] =
            { SYSTEM_BOOTANIMATION_FILE, PRODUCT_BOOTANIMATION_FILE, OEM_BOOTANIMATION_FILE};
    static const char* shutdownFiles[] =
            { PRODUCT_SHUTDOWNANIMATION_FILE, OEM_SHUTDOWNANIMATION_FILE, SYSTEM_SHUTDOWNANIMATION_FILE};

6、services/java/com/android/server/SystemServer.java  
feat:optimize boot time

private boolean isAndroidAuto = false;

modify to:

private boolean isAndroidAuto = true;