Android正在启动的提示框

Android正在启动的提示框相关代码，屏蔽掉就不会有了：

frameworks/base/services/core/java/com/android/server/am/UserController.java
final class UserController {
} else {
quiet = false;
}
- mInjector.sendPreBootBroadcast(userId, quiet,
- () -> finishUserUnlockedCompleted(uss));
+ // mInjector.sendPreBootBroadcast(userId, quiet,
+ // () -> finishUserUnlockedCompleted(uss));
} else {
finishUserUnlockedCompleted(uss);
}

./frameworks/base/services/core/java/com/android/server/policy/PhoneWindowManager.java

@Override
public void showBootMessage(final CharSequence msg, final boolean always) {
Log.v(TAG, "Tim_Boot showBootMessage Android is starting...");
mHandler.post(new Runnable() {
@Override public void run() {
if (mBootMsgDialog == null) {
int theme;
if (mContext.getPackageManager().hasSystemFeature(FEATURE_TELEVISION)) {
theme = com.android.internal.R.style.Theme_Leanback_Dialog_Alert;
} else {
theme = 0;
}

mBootMsgDialog = new ProgressDialog(mContext, theme) {
// This dialog will consume all events coming in to
// it, to avoid it trying to do things too early in boot.
@Override public boolean dispatchKeyEvent(KeyEvent event) {
return true;
}
@Override public boolean dispatchKeyShortcutEvent(KeyEvent event) {
return true;
}
@Override public boolean dispatchTouchEvent(MotionEvent ev) {
return true;
}
@Override public boolean dispatchTrackballEvent(MotionEvent ev) {
return true;
}
@Override public boolean dispatchGenericMotionEvent(MotionEvent ev) {
return true;
}
@Override public boolean dispatchPopulateAccessibilityEvent(
AccessibilityEvent event) {
return true;
}
};
if (mContext.getPackageManager().isUpgrade()) {
mBootMsgDialog.setTitle(R.string.android_upgrading_title);
} else {
mBootMsgDialog.setTitle(R.string.android_start_title);
}
mBootMsgDialog.setProgressStyle(ProgressDialog.STYLE_SPINNER);
mBootMsgDialog.setIndeterminate(true);
mBootMsgDialog.getWindow().setType(
WindowManager.LayoutParams.TYPE_BOOT_PROGRESS);
mBootMsgDialog.getWindow().addFlags(
WindowManager.LayoutParams.FLAG_DIM_BEHIND
| WindowManager.LayoutParams.FLAG_LAYOUT_IN_SCREEN);
mBootMsgDialog.getWindow().setDimAmount(1);
WindowManager.LayoutParams lp = mBootMsgDialog.getWindow().getAttributes();
lp.screenOrientation = ActivityInfo.SCREEN_ORIENTATION_NOSENSOR;
mBootMsgDialog.getWindow().setAttributes(lp);
mBootMsgDialog.setCancelable(false);
mBootMsgDialog.show();
}
mBootMsgDialog.setMessage(msg);
}
});
}

Android正在启动的提示框相关代码，屏蔽掉就不会有了：

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