MaskWindowUtils.java 文件源码

@Nullable
private View showKeyguardView (boolean showSettings) {
    if (Build.VERSION.SDK_INT >= 23) {
        if (!Settings.canDrawOverlays(mContext)) {
            if (!showSettings)
                return null;
            Intent i = new Intent(Settings.ACTION_MANAGE_OVERLAY_PERMISSION);
            mContext.startActivity(i);
            return null;
        }
    }
    View keyguardView = LayoutInflater.from(mContext).inflate(R.layout.layout_keyguard, null);
    WindowManager.LayoutParams wmParams = new WindowManager.LayoutParams();
    wmParams.type = WindowManager.LayoutParams.TYPE_SYSTEM_ERROR;
    wmParams.format = PixelFormat.TRANSPARENT;
    wmParams.flags=WindowManager.LayoutParams.FLAG_DISMISS_KEYGUARD
            | WindowManager.LayoutParams.FLAG_LAYOUT_IN_SCREEN
            | WindowManager.LayoutParams.FLAG_LAYOUT_INSET_DECOR;
    wmParams.width=WindowManager.LayoutParams.MATCH_PARENT;
    wmParams.height= WindowManager.LayoutParams.MATCH_PARENT;
    mManager.addView(keyguardView, wmParams);
    mContext.startActivity(new Intent(mContext, KeyguardLiveActivity.class));
    return keyguardView;
}